| 1. |
- Chew, Michelle, et al.
(författare)
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Decreases in myocardial glucose and increases in pyruvate but not ischaemia are observed during porcine endotoxaemia
- 2008
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Ingår i: Acta Anaesthesiologica Scandinavica. - : Wiley. - 0001-5172 .- 1399-6576. ; 52:7, s. 959-968
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Tidskriftsartikel (refereegranskat)abstract
- Background: Myocardial dysfunction occurs commonly in septic shock. It is not known whether this is due to local ischaemia and metabolic disturbances. Our hypothesis was that endotoxaemic myocardial dysfunction may be associated with interstitial ischaemic and metabolic changes, measured using interstitial microdialysis (MD). Methods: Eighteen pigs were randomized to control (n=6) or endotoxin infusion (n=12). MD catheters were inserted into the myocardium for measurement of interstitial glucose, pyruvate and lactate concentrations. Plasma glucose and lactate concentrations and systemic haemodynamic parameters were measured simultaneously. Results: Compared with the control group, the endotoxaemic animals had significantly decreased left ventricular stroke work and venous oxygen saturation (SvO2), and increased mean pulmonary artery pressure and plasma lactate. In the endotoxaemic group, decreases in interstitial glucose were observed, occurring simultaneously with increases in interstitial pruvate. Interstitial lactate : pyruvate ratios decreased with time in all animals. Conclusions: Despite severe systemic and pulmonary haemodynamic changes, interstitial MD measurements revealed no evidence of anaerobic metabolism in the myocardium of endotoxaemic pigs. There were, however, changes in glucose and pyruvate concentrations, suggesting local energy metabolic disturbances. © 2008 The Authors.
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| 2. |
- Grände, Per-Olof, et al.
(författare)
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Active cooling in traumatic brain-injured patients: a questionable therapy?
- 2009
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Ingår i: Acta Anaesthesiologica Scandinavica. - : Wiley. - 0001-5172 .- 1399-6576. ; 53, s. 1233-1238
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Tidskriftsartikel (refereegranskat)abstract
- Hypothermia is shown to be beneficial for the outcome after a transient global brain ischaemia through its neuroprotective effect. Whether this is also the case after focal ischaemia, such as following a severe traumatic brain injury (TBI), has been investigated in numerous studies, some of which have shown a tendency towards an improved outcome, whereas others have not been able to demonstrate any beneficial effect. A Cochrane report concluded that the majority of the trials that have already been published have been of low quality, with unclear allocation concealment. If only high-quality trials are considered, TBI patients treated with active cooling were more likely to die, a conclusion supported by a recent high-quality Canadian trial on children. Still, there is a belief that a modified protocol with a shorter time from the accident to the start of active cooling, longer cooling and rewarming time and better control of blood pressure and intracranial pressure would be beneficial for TBI patients. This belief has led to the instigation of new trials in adults and in children, including these types of protocol adjustments. The present review provides a short summary of our present knowledge of the use of active cooling in TBI patients, and presents some tentative explanations as to why active cooling has not been shown to be effective for outcome after TBI. We focus particularly on the compromised circulation of the penumbra zone, which may be further reduced by the stress caused by the difference in thermostat and body temperature and by the hypothermia-induced more frequent use of vasoconstrictors, and by the increased risk of contusional bleedings under hypothermia. We suggest that high fever should be reduced pharmacologically.
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| 3. |
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| 4. |
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| 5. |
- Almgren, M, et al.
(författare)
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The Richmond Agitation-Sedation Scale: translation and reliability testing in a Swedish intensive care unit.
- 2010
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Ingår i: Acta Anaesthesiologica Scandinavica. - : Wiley. - 0001-5172 .- 1399-6576. ; 54, s. 729-735
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Tidskriftsartikel (refereegranskat)abstract
- Background: Awareness about adequate sedation in mechanically ventilated patients has increased in recent years. The use of a sedation scale to continually evaluate the patient's response to sedation may promote earlier extubation and may subsequently have a positive effect on the length of stay in the intensive care unit (ICU). The Richmond Agitation-Sedation Scale (RASS) provides 10 well-defined levels divided into two different segments, including criteria for levels of sedation and agitation. Previous studies of the RASS have shown it to have strong reliability and validity. The aim of this study was to translate the RASS into Swedish and to test the inter-rater reliability of the scale in a Swedish ICU. Methods: A translation of the RASS from English into Swedish was carried out, including back-translation, critical review and pilot testing. The inter-rater reliability testing was conducted in a general ICU at a university hospital in the south of Sweden, including 15 patients mechanically ventilated and sedated. Forty in-pair assessments using the Swedish version of the RASS were performed and the inter-rater reliability was tested using weighted kappa statistics (linear weighting). Result: The translation of the RASS was successful and the Swedish version was found to be satisfactory and applicable in the ICU. When tested for inter-rater reliability, the weighed kappa value was 0.86. Conclusion: This study indicates that the Swedish version of the RASS is applicable with good inter-rater reliability, suggesting that the RASS can be useful for sedation assessment of patients mechanically ventilated in Swedish general ICUs.
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| 6. |
- Bartha, Erzsebet, et al.
(författare)
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Could benefits of epidural analgesia following oesophagectomy be measured by perceived perioperative patient workload?
- 2008
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Ingår i: Acta Anaesthesiologica Scandinavica. - : Wiley. - 0001-5172 .- 1399-6576. ; 52:10, s. 1313-1318
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Tidskriftsartikel (refereegranskat)abstract
- Background: A controversy exists whether beneficial analgesic effects of epidural analgesia over intravenous analgesia influence the rate of post-operative complications and the length of hospital stay. There is some evidence that favours epidural analgesia following major surgery in high-risk patients. However, there is a controversy as to whether epidural analgesia reduces the intensive care resources following major surgery. In this study, we aimed at comparing the post-operative costs of intensive care in patients receiving epidural or intravenous analgesia.Methods: Clinical data and rates of post-operative complications were extracted from a previously reported trial following thoraco-abdominal oesophagectomy. Cost data for individual patients included in that trial were retrospectively obtained from administrative records. Two separate phases were defined: costs of pain treatment and the direct cost of intensive care.Results: Higher calculated costs of epidural vs. intravenous pain treatment, 1,037 vs. 410 Euros/patient, were outweighed by lower post-operative costs of intensive care 5,571 vs. 7,921 Euros/patient (NS).Conclusion: Higher costs and better analgesic effects of epidural analgesia compared with intravenous analgesia do not reduce total costs for post-operative care following major surgery.
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| 7. |
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| 8. |
- Björkman Björkelund, Karin, et al.
(författare)
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Reducing delirium in elderly patients with hip fracture: a multi-factorial intervention study.
- 2010
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Ingår i: Acta Anaesthesiologica Scandinavica. - : Wiley. - 0001-5172 .- 1399-6576. ; Apr 7, s. 678-688
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Tidskriftsartikel (refereegranskat)abstract
- Background: There is an evident need for improved management of elderly patients with trauma in order to avoid common and troublesome complications such as delirium. The aim of this study was to investigate whether an implementation of a multi-factorial program including intensified pre-hospital and perioperative treatment and care could reduce the incidence of delirium in elderly patients with hip fracture, cognitively intact at admission to the hospital. In addition, we explored the factors that characterize patients who developed delirium. Methods: A prospective, quasi-experimental design was used. A total of 263 patients with hip fracture (>/=65 years), cognitively intact at admission, were consecutively included between April 2003 and April 2004. On 1 October 2003, a new program was introduced. All patients were screened for cognitive impairment within 30 min after admission to the emergency department using The Short Portable Mental Status Questionnaire (SPMSQ). To screen for delirium, patients were tested within 4 h of admission and thereafter daily, using the Organic Brain Syndrome scale. Results: The number of patients who developed delirium during hospitalization was 74 (28.1%), with a decrease from 34% (45 of 132) in the control group to 22% (29 of 131) in the intervention group (P=0.031). Patients who developed delirium were statistically older, more often had >4 prescribed drugs at admission and scored less well in the SPMSQ test. Conclusion: The use of a multi-factorial intervention program in elderly hip fracture patients, lucid at admission, reduced the incidence of delirium during hospitalization by 35%.
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| 9. |
- Broman, M, et al.
(författare)
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Malignant hyperthermia and central core disease causative mutations in Swedish patients.
- 2007
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Ingår i: Acta Anaesthesiologica Scandinavica. - : Wiley. - 0001-5172 .- 1399-6576. ; 51:Nov 1, s. 50-53
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Tidskriftsartikel (refereegranskat)abstract
- Background: Malignant hyperthermia (MH) susceptibility is a pharmacogenetic disorder of intracellular calcium homeostasis. In susceptible individuals, halogenated anaesthetics and/or suxamethonium may trigger an MH reaction. The diagnosis of MH susceptibility is made by an in vitro contracture test of biopsied muscle strips. Methods: In 27 MH susceptible (MHS) probands and four MH negative (MHN) probands, exons 17, 39, 40, 45 and 46 of the RYR1 gene were screened for MH causative mutations. In addition, in three patients with established central core disease (CCD), exons 17, 39, 40, 45 and 46 and exons 95, 100, 101 and 102 were screened for MH and CCD causative mutations. All screenings were performed by direct sequencing of the entire exons. Results: MH causative mutations were found in five of the 27 MHS probands (19%). CCD causative mutations were found in two of three CCD patients in the C-terminal exons. None of the CCD patients showed a mutation in N-terminal exon 17 or in the central exons. Conclusions: In a Swedish population, screening of N-terminal exon 17 and the central exons for MH causative mutations in the RYR1 gene covers 19% of families. Thus, other mutations must also be responsible for MH susceptibility in Sweden. Although the number of CCD patients in this study was small, screening of the C-terminal exons for CCD causative mutations seems to be a promising tool in the process of making a diagnosis.
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| 10. |
- Ciornei, Cristina
(författare)
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Vascular actions of antimicrobial peptides
- 2006
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Ingår i: Acta Anaesthesiologica Scandinavica. - : Wiley. - 0001-5172 .- 1399-6576. ; 50:5, s. 631-631
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Tidskriftsartikel (refereegranskat)
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| 11. |
- Covaciu, Lucian, et al.
(författare)
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Intranasal cooling with or without intravenous cold fluids during and after cardiac arrest in pigs
- 2010
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Ingår i: Acta Anaesthesiologica Scandinavica. - : Wiley. - 0001-5172 .- 1399-6576. ; 54:4, s. 494-501
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Tidskriftsartikel (refereegranskat)abstract
- Background: Intranasal balloon catheters circulated with cold saline have previously been used for the induction and maintenance of selective brain cooling in pigs with normal circulation. In the present study, we investigated the feasibility of therapeutic hypothermia initiation, maintenance and rewarming using such intranasal balloon catheters with or without addition of intravenous ice-cold fluids during and after cardiac arrest treatment in pigs. Material and methods: Cardiac arrest was induced in 20 anaesthetised pigs. Following 8 min of cardiac arrest and 1 min of cardiopulmonary resuscitation (CPR), cooling was initiated after randomisation with either intranasal cooling (N) or combined with intravenous ice-cold fluids (N+S). Hypothermia was maintained for 180 min, followed by 180 min of rewarming. Brain and oesophageal temperatures, haemodynamic variables and intracranial pressure (ICP) were recorded. Results: Brain temperatures reductions after cooling did not differ (3.8 +/- 0.7 degrees C in the N group and 4.3 +/- 1.5 degrees C in the N+S group; P=0.47). The corresponding body temperature reductions were 3.6 +/- 1.2 degrees C and 4.6 +/- 1.5 degrees C (P=0.1). The resuscitation outcome was similar in both groups. Mixed venous oxygen saturation was lower in the N group after cooling and rewarming (P=0.024 and 0.002, respectively) as compared with the N+S group. ICP was higher after rewarming in the N group (25.2 +/- 2.9 mmHg; P=0.01) than in the N+S group (15.7 +/- 3.3 mmHg). Conclusions: Intranasal balloon catheters can be used for therapeutic hypothermia initiation, maintenance and rewarming during CPR and after successful resuscitation in pigs.
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| 12. |
- Dubniks, Maris, et al.
(författare)
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The effects of activated protein C and prostacyclin on arterial oxygenation and protein leakage in the lung and the gut under endotoxaemia in the rat.
- 2008
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Ingår i: Acta Anaesthesiologica Scandinavica. - : Wiley. - 0001-5172 .- 1399-6576. ; 52, s. 381-387
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Tidskriftsartikel (refereegranskat)abstract
- Background: Based on the anti-adhesive/anti-aggregatory and permeability-reducing properties of activated protein C (APC) and prostacyclin (PGI(2)), we analysed and compared these substances regarding their efficacy in counteracting transcapillary leakage of albumin in the lung and the gut, and in improving arterial oxygenation under a condition of inflammation. Methods: The randomized and blinded study was performed on 31 adult male Sprague-Dawley rats. Inflammation was induced by continuous infusion of Escherichia coli endotoxin (lipopolysaccharide, LPS). Six hours after the start of the LPS infusion (240,000 U/kg/h), a simultaneous infusion of saline (control group) or 8 mug/kg/min of human recombinant APC or 2 ng/kg/min of PGI(2) was started and continued for 24 h (n=8 per group). The study also included a sham group. Transcapillary leakage of albumin was measured from the ratio between tissue radioactivity [counts per minute (cpm)/g tissue] and actual amount of radioactivity given (cpm/g body weight of (125)I-albumin). Oxygenation was assessed from arterial and central venous blood samples. Results: LPS induced albumin leakage in the gut and the lung, and impaired blood oxygenation. In the lung, the leakage was lower in the PGI(2) group than in the APC and the control groups (P<0.05). In the gut, it was lower in the APC and the PGI(2) groups than in the control group (P<0.05). Oxygenation was better in the APC and PGI(2) groups than in the control group. Conclusion: Our data suggest that both APC and low-dose PGI(2) are beneficial in LPS-induced inflammation in the rat, by reducing albumin leakage and improving blood oxygenation.
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| 13. |
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| 14. |
- Gardenfors, F, et al.
(författare)
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Adverse biochemical and physiological effects of prostacyclin in experimental brain oedema
- 2004
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Ingår i: Acta Anaesthesiologica Scandinavica. - : Wiley. - 0001-5172 .- 1399-6576. ; 48:10, s. 1316-1321
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Tidskriftsartikel (refereegranskat)abstract
- Background: Prostacyclin (PGI(2)) and its stable analogues are known to reduce capillary hydraulic permeability. This study explores the biochemical and physiological effects of i.v. infusion of low-dose PGI(2) in an experimental model of vasogenic brain oedema. Methods: Twenty-seven anaesthetized and mechanically ventilated piglets with brain oedema induced by intrathecal injection of lipopolysaccharide (LPS) were used. Five of the animals received a continuous infusion of PGI(2) (1 ng kg(-1) min(-1)) i.v. Four microdialysis catheters were placed in the brain to measure interstitial concentrations of glucose, lactate, and glycerol. Mean arterial pressure (MAP), intracranial pressure (ICP) and temperature were monitored continuously. Low-dose infusion of PGI(2) started 1 h before the LPS injection and was constant during the study period. Results: Intracranial pressure increased significantly in animals treated with PGI(2). The increase in ICP was associated with significant cerebral biochemical changes: decrease in glucose, increase in lactate, increase in lactate/glucose ratio and increase in glycerol. Conclusion: In LPS-induced brain oedema i.v. infusion of low-dose PGI(2) caused a further increase in ICP and a perturbation of energy metabolism, indicating cerebral ischemia and degradation of cellular membranes.
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| 15. |
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| 16. |
- Grände, Per-Olof
(författare)
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Mechanisms behind postspinal headache and brain stem compression following lumbar dural puncture - a physiological approach.
- 2005
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Ingår i: Acta Anaesthesiologica Scandinavica. - : Wiley. - 0001-5172 .- 1399-6576. ; 49:5, s. 619-626
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Tidskriftsartikel (refereegranskat)abstract
- Background: The cause of postspinal headache and its specific characteristics are unknown, and whether lumbar dural puncture (LP) triggers brain-stem compression in patients with brain oedema is still controversial. Methods: Hydrostatic effects of distal opening of the dural sac towards the atmosphere are described and applied to the normal brain and the brain with disrupted BBB. Analogue analyses from previous results using an isolated skeletal muscle enclosed in a rigid shell were applied to the brain in an attempt to simulate and verify the haemodynamic effects of distal opening of the spinal canal. Results: The theoretical considerations and the experimental results are compatible with the hypothesis that hydrostatic effects of distal opening of the fluid-filled spinal canal may obliterate the normal subdural venous collapse after a change from the horizontal to vertical position, which may be compatible with postural postspinal headache as occurring close to pain-sensitive meningeal regions. The hydrostatic forces may also initiate transcapillary filtration and aggravate oedema when permeability is increased, which may cause a narrower situation in the brain stem region, perhaps aggravated by venous stasis and a Cushing reflex-induced increase in blood pressure. An magnetic resonance imaging (MRI) picture illustrates how this scenario may separate the subdural space into an upper high- and a lower low-pressure cavity, pressing the brain downwards with sagging of the brain. A life-threatening positive feedback situation for brain-stem compression may develop. Conclusion: The present study strongly suggests that postspinal headache and brain-stem compression and other LP-related effects are predictable following LP, without involving CSF leakage, and can be explained by hydrostatic effects triggered by distal opening of the normally closed dural space to the atmosphere.
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| 17. |
- Gullberg, N., et al.
(författare)
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Immediate and 5-year cumulative outcome after paediatric intensive care in Sweden
- 2008
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Ingår i: Acta Anaesthesiologica Scandinavica. - : Wiley. - 0001-5172 .- 1399-6576. ; 52:8, s. 1086-95
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Tidskriftsartikel (refereegranskat)abstract
- Background: Little has been reported about intensive care of children in Sweden. The aims of this study are to (I) assess the number of admissions, types of diagnoses and length-of-stay (LOS) for all Swedish children admitted to intensive care during the years 1998-2001, and compare paediatric intensive care units (PICUs) with other intensive care units (adult ICUs) (II) assess immediate (ICU) and cumulative 5-year mortality and (III) determine the actual consumption of paediatric intensive care for the defined age group in Sweden. Methods: Children between 6 months and 16 years of age admitted to intensive care in Sweden were included in a national multicentre, ambidirectional cohort study. In PICUs, data were also collected for infants aged 1-6 months. Survival data were retrieved from the National Files of Registration, 5 years after admission. Results: Eight-thousand sixty-three admissions for a total of 6661 patients were identified, corresponding to an admission rate of 1.59/1000 children per year. Median LOS was 1 day. ICU mortality was 2.1% and cumulative 5-year mortality rate was 5.6%. Forty-four per cent of all admissions were to a PICU. Conclusions: This study has shown that Sweden has a low immediate ICU mortality, similar in adult ICU and PICU. Patients discharged alive from an ICU had a 20-fold increased mortality risk, compared with a control cohort for the 5-year period. Less than half of the paediatric patients admitted for intensive care in Sweden were cared for in a PICU. Studies are needed to evaluate whether a centralization of paediatric intensive care in Sweden would be beneficial to the paediatric population.
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| 18. |
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| 19. |
- Holmström, Anders, et al.
(författare)
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Desflurane results in higher cerebral blood flow than sevoflurane or isoflurane at hypocapnia in pigs.
- 2004
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Ingår i: Acta Anaesthesiologica Scandinavica. - : Wiley. - 0001-5172 .- 1399-6576. ; 48:4, s. 400-404
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Tidskriftsartikel (refereegranskat)abstract
- Background: In clinical neuroanaesthesia, the increase in cerebral blood flow (CBF) and intracranial pressure caused by the cerebral vasodilative effects of an inhalational anaesthetic agent is counteracted by the cerebral vasoconstriction induced by hypocapnia. Desflurane and sevoflurane may have advantages over the more traditionally used isoflurane in neuroanaesthesia but their dose-dependent vasodilative effects at hypocapnia have not been compared in the same model using truly equipotent minimal alveolar concentrations (MACs). Method: Desflurane, sevoflurane and isoflurane were administered in a randomized order to six pigs at 0.5 and 1.0 MAC. The intra-arterial xenon clearance technique was used to calculate CBF. Blood pressure was invasively monitored. Cerebral and systemic physiological variables were recorded first at normocapnia (PaCO2 5.6 kPa) and then at hypocapnia (PaCO2 3.5 kPa). Electroencephalographic (EEG) activity was continuously recorded. Results: None of the three agents abolished cerebrovascular reactivity to hyperventilation, and at 0.5 MAC all had similar effects on CBF at hypocapnia. Desflurane at 1.0 MAC was associated with 16% higher CBF (P = 0.027) at hypocapnia than isoflurane, and with 24% higher CBF (P = 0.020) than sevoflurane. There was no seizure activity in the EEG. Conclusion: More cerebral vasodilation at hypocapnia with high doses of desflurane than with sevoflurane or isoflurane indicates that desflurane might be less suitable for neuroanaesthesia than sevoflurane and isoflurane.
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| 20. |
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| 21. |
- Ihrman, Lilian, et al.
(författare)
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Changes in blood lactate predict outcome better than absolute values in severe SIRS
- 2009
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Ingår i: Acta Anaesthesiologica Scandinavica. - : Wiley. - 0001-5172 .- 1399-6576. ; 53:s119, s. 54-54
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Konferensbidrag (refereegranskat)abstract
- Introduction: Serum lactate is considered to be a marker of tissue hypoxia (1) Cut-off values >4 mM predict poor outcome, yet many patients after resuscitation according Surviving Sepsis Campaign guidelines (SSCG) (2) have high mortality despite decreases in blood lactate. Our hypothesis was that dynamic, rather than absolute blood lactate concentrations predict survival. Further we tested the ability of microdialysis lactate (MD-lac) to follow dynamic changes in blood levels, and whether this was also predictive of survival. Methods: Prospective, observational, single-centre cohort study in a mixed-bed university hospital ICU. About 53 consecutive patients with SIRS and circulatory failure despite adequate fluid resuscitation according to the SSCG were included. Arterial blood lactate (B-lac) was measured 6- hourly and MD-lac in subcutaneous tissue measured 4- hourly. Changes in B- and MD-lac from baseline were also calculated. Results: There were no differences in absolute values of B- lac or MD-lac between survivors and non-survivors during the first 24 h, nor were there differences in the change in MD-lac. In contrast changes in B-lac were greater in survivors. Among patients who reached P-lac > 4 mM during the study period of 7 days, the mortality rate was 37% as compared to 21% in the others, although this did not reach statistical significance. Conclusions: Survivors of severe SIRS were characterized by greater changes in B-lac compared to baseline. This supports the concept of lactate clearance, rather than absolute values, as a useful end point for fluid resuscitation, as opposed to the traditional endpoints used in the SSCG. In contrast MD- lac was not a useful predictor of mortality in this population.
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| 22. |
- Islander, Gunilla, et al.
(författare)
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Male preponderance of patients testing positive for malignant hyperthermia susceptibility.
- 2007
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Ingår i: Acta Anaesthesiologica Scandinavica. - : Wiley. - 0001-5172 .- 1399-6576. ; 51:5, s. 614-620
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Tidskriftsartikel (refereegranskat)abstract
- Malignant hyperthermia susceptibility is diagnosed using an in vitro contracture test (IVCT). In families in which the mutation is known, genetic tests are also available. The inheritance pattern is regarded as autosomal dominant, which predicts equal proportions of men and women affected. The aim of this study was to investigate whether there were sex differences in the diagnostic outcome of the 1407 patients tested for malignant hyperthermia in Sweden between 1985 and 2005. Methods: Information about sex, diagnosis, IVCT result and kinship was analysed. Comparisons were made between the two sexes. Probands and relatives were analysed separately in order to eliminate bias caused by the type of surgery performed in the two sexes. Results: Males, more than females, revealed a pathological outcome in IVCT. Amongst male relatives, the fraction of pathological outcome in IVCT was 0.70 [95% confidence interval (CI), 0.66-0.74]; the corresponding value for females was 0.40 (95% CI, 0.36-0.44). Conclusion: A significant difference was observed in the sex distribution of outcome of IVCT, with significantly more males revealing a pathological IVCT. This indicates the influence of one or several factors related to sex in the outcome of IVCT, for example different expression of calcium handling proteins in the sexes, a complex pattern of inheritance or unknown environmental factors.
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| 23. |
- Kalliomäki, Maija-L, et al.
(författare)
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Persistent pain after groin hernia surgery : a qualitative analysis of pain and its consequences for quality of life
- 2009
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Ingår i: Acta Anaesthesiologica Scandinavica. - : Wiley. - 0001-5172 .- 1399-6576. ; 53:2, s. 236-246
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Tidskriftsartikel (refereegranskat)abstract
- Despite a high prevalence of persistent groin pain after hernia repair, the specific nature of the pain and its clinical manifestation are poorly known. The aim of this study was to determine the type of post-herniorrhaphy pain and its influence on daily life. In order to assess long-term pain qualitatively and to explore how it affects quality of life, 100 individuals with persisting pain, identified in a cohort study of patients operated for groin hernia, were neurologically examined, along with 100 pain-free controls matched for age, gender and type of operation. The patients were asked to answer the SF-36 questionnaire, the hospital anxiety and depression scale, the Swedish Scales of Personality (SSP) and a standardised questionnaire for assessing everyday life coping. The patients were approached approximately 4.9 years after surgery. Twenty-two patients from the pain group had become pain free by the time of examination, whereas 76 patients still had pain, of whom 47 (68%) suffered from neuropathic pain and 11 from nociceptive pain. The remaining patients suffered from mixed pain, neuropathic and nociceptive, or were found to have another reason for pain. All dimensions of SF-36 were poorer for the pain group than the control group. Persistent post-herniorrhaphy pain is mainly neuropathic and has a substantial impact on health-related quality of life.
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| 24. |
- Klarin, Bengt, et al.
(författare)
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Lactobacillus plantarum 299v reduces colonisation of Clostridium difficile in critically ill patients treated with antibiotics
- 2008
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Ingår i: Acta Anaesthesiologica Scandinavica. - : Wiley. - 0001-5172 .- 1399-6576. ; 52:8, s. 1096-1102
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Tidskriftsartikel (refereegranskat)abstract
- Background: The incidence of Clostridium difficile-associated disease (CDAD) in hospitalised patients is increasing. Critically ill patients are often treated with antibiotics and are at high risk of developing CDAD. Lactobacillus plantarum 299v (Lp299v) has been found to reduce recurrence of CDAD. We investigated intensive care unit (ICU) patients regarding the impact of Lp299v on C. difficile colonisation and on gut permeability and parameters of inflammation and infection in that context. Methods: Twenty-two ICU patients were given a fermented oatmeal gruel containing Lp299v, and 22 received an equivalent product without the bacteria. Faecal samples for analyses of C. difficile and Lp299v were taken at inclusion and then twice a week during the ICU stay. Other cultures were performed on clinical indication. Infection and inflammation parameters were analysed daily. Gut permeability was assessed using a sugar probe technique. Main Results: Colonisation with C. difficile was detected in 19% (4/21) of controls but in none of the Lp299v-treated patients (p < 0.05). Conclusions: Enteral administration of the probiotic bacterium Lp299v to critically ill patients treated with antibiotics reduced colonisation with C. difficile. Trial registration: Current Controlled Trials ISRCTN85655545
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| 25. |
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| 26. |
- Larsson, C., et al.
(författare)
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Confusion assessment method for the intensive care unit (CAM-ICU): translation, retranslation and validation into Swedish intensive care settings
- 2007
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Ingår i: Acta Anaesthesiologica Scandinavica. - : Wiley. - 0001-5172 .- 1399-6576. ; 51:7, s. 888-892
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Tidskriftsartikel (refereegranskat)abstract
- Background: Becoming critical ill or severely injured leads to a process of worry, anxiety and pain. Patients in intensive care sometimes have strange and frightening experiences and may show symptoms of acute confusion or delirium. CAM-ICU, the confusion assessment method for the intensive care unit, was based on the DSM IV, the Diagnostic and Statistic Manual of Mental Disorders IV, and today, healthcare professionals and researchers are increasingly accepting this concept of diagnosing ICU delirium. In Sweden, there is no commonly used, single instrument or method to test the development of ICU delirium. The aim of this study was to translate, retranslate and validate CAM-ICU for use in Swedish ICU settings. Methods: The translation of the instrument was done according to the guidelines suggested by The Translation and Cultural Adaptation group which includes preparation, forward translation/reconciliation, back translation, back translation review, harmonization, cognitive debriefing and validation. In the validation process, the applicability of the Swedish version of the instruments was tested in a Swedish intensive care unit. Results: Fourteen adult patients were included in the study, 40 paired tests were carried out, and 80 CAM-ICU instruments were completed. The participating patients were given CAM-ICU ratings using independent paired evaluations by two nurses, specialized in intensive care, at least twice during the patients' stay in the ICU. Interrater reliability was calculated using kappa statistics. In the 40 paired observations, interrater reliability was 'very good' (kappa statistics > 0.81). In our material, we recognized a delirium rate of 48%, which is in accordance with previous studies. Conclusion: The translation of the instrument CAM-ICU showed good correlation with the original version and could therefore be applicable in a Swedish ICU setting. In the 40 paired observations, interrater reliability was very good. Although there are limitations in using CAM-ICU, previous studies reveal a need for a homogeneous screening instrument making it possible to detect and determine ICU delirium; and from this basis are able to implement and make the necessary decisions required in medical and nursing care practice preventing ICU delirium.
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| 27. |
- Larsson, P, et al.
(författare)
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Thiopentone elimination in newborn infants: exploring Michaelis-Menten kinetics.
- 2011
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Ingår i: Acta Anaesthesiologica Scandinavica. - : Wiley. - 0001-5172 .- 1399-6576. ; 55, s. 444-451
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Tidskriftsartikel (refereegranskat)abstract
- Background: Thiopentone elimination has been described using Michaelis-Menten pharmacokinetics in adults after prolonged infusion or overdose, but there are few reports of elimination in neonates. Methods: Time-concentration profiles for neonates (n=37) given single-dose thiopentone were examined using both first-order (constant clearance) and mixed-order (Michaelis-Menten) elimination processes using nonlinear mixed effects models. These profiles included a 33-week post-menstrual age (PMA) neonate given an overdose. A two-compartment mamillary model was used to fit data. Parameter estimates were standardized to a 70 kg person using allometric models. Results: There were 197 observations available for analysis from neonates with a mean post-menstrual age of 35 (SD 4.5) weeks and a mean weight of 2.5 (SD 0.9) kg. They were given a mean thiopentone dose of 3 (SD 0.4) mg/kg as a rapid bolus. Clearance at 26 weeks PMA was 0.015 l/min/70 kg and increased to 0.119 l/min/70 kg by 42 weeks PMA. The maximum rate of elimination (V(max) ) at 26 weeks PMA was 0.22 mg/min/70 kg and increased to 4.13 mg/min/70 kg by 42 weeks PMA. These parameter estimates are approximately 40% adult values at term gestation. The Michaelis constant (K(m) ) was 28.3 [between subject variability (BSV) 46.4%, 95% confidence interval (CI) 4.49-99.2] mg/l; intercompartment clearance was 0.44 (BSV 97.5%, 95% CI 0.27-0.63) l/min/70 kg; central volume of distribution was 46.4 (BSV 29.2%, 95% CI 41.7-59.8) l/70 kg; peripheral volume of distribution was 95.7 (BSV 70.3%, 95% CI 61.3-128) l/70 kg. Conclusions: Both first-order and mixed-order processes satisfactorily described elimination. First-order elimination adequately described the time-concentration profile in the premature neonate given an overdose. Clearance is immature in the pre-term neonate although there is rapid maturation around 40 weeks PMA, irrespective of post-natal age.
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| 28. |
- Liljeroth, Elisabeth, et al.
(författare)
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Less local pain on intravenous infusion of a new propofol emulsion
- 2005
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Ingår i: Acta Anaesthesiologica Scandinavica. - : Wiley. - 0001-5172 .- 1399-6576. ; 49:2, s. 248-251
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Tidskriftsartikel (refereegranskat)abstract
- Background: Local pain at the site of intravenous (iv) injection of propofol remains a considerable problem in clinical anaesthesiology, and particularly so in infants. The aim of the present study was to compare the influence of two different emulsions of propofol on local pain following iv administration. Methods: Eighty adult patients (ASA I-II) scheduled for ear-nose-throat or plastic surgery were randomly allocated into two study groups: A and B. A 1.0-mm teflon cannula (BD, Helsingborg, Sweden) was inserted into a dorsal vein on each hand. Each patient was given two 3.0-ml iv bolus injections of two different propofol emulsions of 10 mg ml(-1) over 2 s, one in each cannula, at 5-min intervals. The first study drug administered was Diprivan((R)) (AstraZeneca, Sodertalie, Sweden) in group A (n = 34) and Propofol-Lipuro (Braun, Melsungen, Germany) in group B (n = 39). Each patient was then asked by a blinded investigator to score maximal pain intensity on a visual analogue scale (VAS). Results: The maximal intensity of propofol-induced local pain was significantly (P < 0.0001) lower after Propofol-Lipuro than after Diprivan((R))- median 1 (25th percentile: 0; 75th percentile: 2) range 0-6 vs. 3 (0; 5) 0-9 VAS units. Conclusion: The considerably lower intensity of local pain found to be associated with iv administration of the new drug formula Propofol-Lipuro indicates that emulsions of propofol based on medium- and long-chain triglycerides have a clinical advantage over traditional ones for induction of anaesthesia.
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| 29. |
- Liljeroth, E., et al.
(författare)
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Low-dose propofol reduces the incidence of moderate to severe local pain induced by the main dose
- 2007
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Ingår i: Acta Anaesthesiologica Scandinavica. - : Wiley. - 0001-5172 .- 1399-6576. ; 51:4, s. 460-463
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Tidskriftsartikel (refereegranskat)abstract
- Background Local pain on injection of propofol remains a considerable problem in clinical anaesthesiology. As slow infusion of a low dose of propofol induces little or no pain at the site of injection, and as propofol-induced pain fades during prolonged exposure, this randomized, double-blind, clinical cross-over study was designed to test whether pain on injection of propofol is attenuated by initial slow injection of a low dose of propofol by the same intravenous line. Methods Seventy-seven adult surgical patients were cannulated in a dorsal vein on each hand. In each cannula, a 0.5-ml priming dose of either propofol 10 mg/ml dissolved in an emulsion of medium- and long-chain triglycerides or aqueous sodium chloride 9.0 mg/ml was injected over 30 s, and followed 120 s later by a main dose of 2.0 ml of the same propofol formula over 6 s. After each injection, the patients were asked by a blind investigator to score the maximal pain intensity on a visual analogue scale (VAS). Results Although the decrease in maximal pain intensity did not reach statistical significance (P = 0.070), significantly fewer patients reported moderate or severe pain intensity (corresponding to 3.0 VAS units or more) after the main dose of propofol was preceded by a priming dose of propofol than by sodium chloride (P = 0.041). Conclusions The incidence of moderate to severe local pain induced by intravenous propofol can be decreased by a readily applicable technique in which a low dose of propofol emulsion is slowly administered by the same intravenous route 2 min in advance.
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| 30. |
- Liljeroth, Elisabeth, et al.
(författare)
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Sustained intravascular exposure to propofol does not prolong pain at the site of injection
- 2007
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Ingår i: Acta Anaesthesiologica Scandinavica. - : Wiley. - 0001-5172 .- 1399-6576. ; 51:4, s. 456-459
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Tidskriftsartikel (refereegranskat)abstract
- Background Pain at the site of intravenous injection of propofol is a common clinical finding. This double-blind, randomized cross-over study was designed to evaluate whether venous occlusion applied during injection of a low dose of propofol reduces the intensity of pain at the site of injection compared with no occlusion. Methods Bilateral 0.5-ml injections of an emulsion containing 10 mg/ml of propofol were given over 30 s in 75 adult surgical patients. Each patient was given one injection with and one without 60-s occlusion of the cannulated vein with a 10-min interval, and asked to score the maximal pain intensity on a visual analogue scale (VAS). Results The maximal pain intensity [median (25th percentile; 75th percentile), range] at the site of injection was 0.5 (0; 3.5), 0-8.0 VAS units with venous occlusion and 0.5 (0; 1.4), 0-6.0 VAS units without occlusion (P = 0.042). Pain was first reported within 20 s regardless of the study regimen and was not prolonged by local venous occlusion. Conclusions Venous occlusion augments pain intensity at the site of propofol injection without prolonging pain, implying that propofol-induced pain is determined more by the blood concentration than by the duration of intravascular exposure. The low intensity of pain induced by low-dose propofol and the fading of pain despite sustained exposure suggest that initial low-dose administration of propofol should be evaluated for the attenuation of local pain induced by higher intravenous doses of propofol.
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| 31. |
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| 32. |
- Malmgren, W, et al.
(författare)
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Similar excitation after sevoflurane anaesthesia in young children given rectal morphine or midazolam as premedication.
- 2004
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Ingår i: Acta Anaesthesiologica Scandinavica. - : Wiley. - 0001-5172 .- 1399-6576. ; 48:10, s. 1277-1282
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Tidskriftsartikel (refereegranskat)abstract
- Background: Sevoflurane is a rapid-acting volatile anaesthetic agent frequently used in paediatric anaesthesia despite transient postoperative symptoms of cerebral excitation, particularly in preschool children. This randomised and investigator-blinded study was designed to evaluate whether premedication with an opioid might reduce non-divertible postoperative excitation more than premedication with a benzodiazepine in preschool children anaesthetized with sevoflurane. Methods: Ninety-two healthy two to six year-old children scheduled for nasal adenoidectomy were randomised to be given rectal atropine 0.02 mg kg-1 together with either morphine 0.15 mg kg-1 or midazolam 0.30 mg kg-1 approximately 30 min before induction and maintenance of sevoflurane anaesthesia. The patient groups were compared pre- and postoperatively by repeated clinical assessments of cerebral excitation according to a modified Objective Pain Discomfort Scale, OPDS. Results: There were no statistically significant postoperative differences in incidence, extent or duration of excitation between children given morphine or midazolam for premedication, whereas morphine was associated with more preoperative excitation than was midazolam. The study groups did not differ significantly with respect to age, weight, duration of surgery and anaesthesia, and time from tracheal extubation to arrival in and discharge from the postoperative ward. Conclusion: In this study morphine for premedication in young children anaesthetized with sevoflurane was associated with similar postoperative and higher preoperative OPDS scores compared with midazolam. These findings indicate that substitution of morphine for midazolam is no useful way of reducing clinical excitation after sevoflurane anaesthesia.
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| 33. |
- Metzsch, Carsten, et al.
(författare)
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Levosimendan cardioprotection in acutely beta-1 adrenergic receptor blocked open chest pigs.
- 2010
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Ingår i: Acta Anaesthesiologica Scandinavica. - : Wiley. - 0001-5172 .- 1399-6576. ; 54, s. 103-110
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Tidskriftsartikel (refereegranskat)abstract
- Background: Levosimendan and volatile anesthetics have myocardial pre-conditioning effects. beta-1 adrenergic receptor antagonists may inhibit the protective effect of volatile anesthetics. No information exists as to whether this also applies to the pre-conditioning effect of levosimendan. We therefore investigated whether levosimendan added to metoprolol would demonstrate a cardioprotective effect. Methods: Three groups of anesthetized open chest pigs underwent 30 min of myocardial ischemia and 90 min of reperfusion by temporary occlusion of the largest side branch from the circumflex artery or the left anterior descending artery. One group (CTRL) served as a control, in another group (BETA), a metoprolol-loading dose was intravenously injected 30 min before ischemia, and in a third group (BETA+L), a levosimendan infusion was added to metoprolol. Myocardial tissue concentrations of glucose, glycerol, and lactate/pyruvate ratio as the primary end-points were investigated with microdialysis in ischemic and non-ischemic tissues. Results: At the end of the ischemic period, statistically significant differences were only found between CTRL and BETA+L in the ischemic myocardium, with a lower lactate/pyruvate ratio, lower glycerol, and higher glucose concentrations in BETA+L as compared with CTRL. There were no differences in non-ischemic myocardium. From 10 to 90 min of reperfusion, no more differences were found between groups. Conclusion: The cardioprotective effect of levosimendan on ischemic metabolism with a reduction in the myocardial lactate/pyruvate ratio, less glycerol accumulation, and better preserved glucose concentration does not seem to be prevented by beta-1 adrenergic receptor antagonism with metoprolol.
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| 34. |
- Metzsch, Carsten, et al.
(författare)
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Levosimendan cardioprotection reduces the metabolic response during temporary regional coronary occlusion in an open chest pig model.
- 2007
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Ingår i: Acta Anaesthesiologica Scandinavica. - : Wiley. - 0001-5172 .- 1399-6576. ; 51, s. 86-93
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Tidskriftsartikel (refereegranskat)abstract
- Background: Inotropic and myocardial anti-ischemic effects have been demonstrated with levosimendan. The comparison of levosimendan started before an ischemia-reperfusion event as compared with levosimendan started during ischemia has not been studied. Methods: In anesthetized pigs, a major branch of the circumflex artery was completely occluded for 30 min and then reperfused. The metabolism in the ischemic myocardium and in non-ischemic control myocardium was studied with microdialysis concomitantly with monitoring of global hemodynamics and coronary artery flow in the chosen artery. In the protection group (PRO, n = 6), a levosimendan infusion was started 30 min before coronary artery occlusion, and in the treatment group (TRE, n = 6), a levosimendan infusion was started 10 min after the coronary artery occlusion with a loading dose of 13.3 mu g/kg followed by an infusion of 0.67 mu g/kg/min. A two-way repeated measures ANOVA completed with Bonferroni's multiple comparison procedure was applied to the data. A P < 0.05 was considered significant. Results: During the ischemic period, the cardiac output and contractility (dp/dt(max)) were higher in the PRO as compared with the TRE and the systemic vascular resistance was lower. The myocardial microdialysate glucose concentration in the ischemic area during ischemia was higher in the PRO as compared with the TRE, and the lactate/pyruvate ratio and the lactate concentration were lower. The differences in the metabolites persisted into the first 10 min of reperfusion. No differences were found for the non-ischemic areas. Conclusions: Levosimendan used throughout myocardial ischemia-reperfusion might have a cardioprotective affect on the response to myocardial ischemia as compared with levosimendan started during the ischemia.
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| 35. |
- Naredi, S., et al.
(författare)
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An outcome study of severe traumatic head injury using the "Lund therapy" with low-dose prostacyclin
- 2001
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Ingår i: Acta Anaesthesiologica Scandinavica. - : Wiley-Blackwell. - 0001-5172 .- 1399-6576. ; 45:4, s. 402-406
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Tidskriftsartikel (refereegranskat)abstract
- Background: There are two independent head injury outcome studies using the “Lund concept”, and both showed a mortality rate of about 10%, and a favourable outcome (Glasgow outcome scale, GOS 4 and 5) of about 70%. The Lund concept aims at controlling intracranial pressure, and improving microcirculation around contusions. Intracranial pressure is controlled by maintaining a normal colloid osmotic pressure and reducing the hydrostatic capillary pressure. Microcirculation is improved by ensuring strict normovolaemia and reducing sympathetic discharge. The endogenous substance prostacyclin with its antiaggregatory/antiadhesive effects may further improve microcirculation, which finds support from a microdialysis‐based clinical study and an experimental brain trauma study. The present clinical outcome study aims at evaluating whether the previously obtained good outcome with the Lund therapy can be reproduced, and whether the addition of prostacyclin has any adverse side‐effects.Methods: All 31 consecutive patients with severe head injury, Glasgow coma scale (GCS) ≤8, admitted to the University Hospital of Umeå during 1998 were included. The Lund therapy including prostacyclin infusion for the first three days at a dose of 0.5 ng kg−1 min−1. Outcome was evaluated according to the GOS >10 months after the injury.Results: One patient died, another suffered vegetative state and 7 severe disability. Of the 22 patients with favourable outcome, 19 showed good recovery and 3 moderate disability. No adverse side‐effects of prostacyclin were observed.Conclusion: The outcome results from previous studies using the Lund therapy were reproduced, and no adverse side‐effects of low‐dose prostacyclin were observed.
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| 36. |
- Nielsen, Niklas, et al.
(författare)
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Outcome, timing and adverse events in therapeutic hypothermia after out-of-hospital cardiac arrest
- 2009
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Ingår i: Acta Anaesthesiologica Scandinavica. - : Wiley. - 0001-5172 .- 1399-6576. ; 53:7, s. 926-34
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: Therapeutic hypothermia (TH) after cardiac arrest protects from neurological sequels and death and is recommended in guidelines. The Hypothermia Registry was founded to the monitor outcome, performance and complications of TH. METHODS: Data on out-of-hospital cardiac arrest (OHCA) patients admitted to intensive care for TH were registered. Hospital survival and long-term outcome (6-12 months) were documented using the Cerebral Performance Category (CPC) scale, CPC 1-2 representing a good outcome and 3-5 a bad outcome. RESULTS: From October 2004 to October 2008, 986 TH-treated OHCA patients of all causes were included in the registry. Long-term outcome was reported in 975 patients. The median time from arrest to initiation of TH was 90 min (interquartile range, 60-165 min) and time to achieving the target temperature (< or =34 degrees C) was 260 min (178-400 min). Half of the patients underwent coronary angiography and one-third underwent percutaneous coronary intervention (PCI). Higher age, longer time to return of spontaneous circulation, lower Glasgow Coma Scale at admission, unwitnessed arrest and initial rhythm asystole were all predictors of bad outcome, whereas time to initiation of TH and time to reach the goal temperature had no significant association. Bleeding requiring transfusion occurred in 4% of patients, with a significantly higher risk if angiography/PCI was performed (2.8% vs. 6.2%P=0.02). CONCLUSIONS: Half of the patients survived, with >90% having a good neurological function at long-term follow-up. Factors related to the timing of TH had no apparent association to outcome. The incidence of adverse events was acceptable but the risk of bleeding was increased if angiography/PCI was performed.
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| 37. |
- Nilsson, Eric, et al.
(författare)
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Effect of local anaesthetics on wound healing - An experimental study with special reference to Carbocain
- 2007
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Ingår i: Acta Anaesthesiologica Scandinavica. - : Wiley. - 0001-5172 .- 1399-6576. ; 51:8, s. 991-1003
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Tidskriftsartikel (refereegranskat)abstract
- Recent research has improved the possibilities of assessing the influence of various factors on wound healing. Thus, PH. SANDBLOM (1944)(4), PH. SANDBLOM and A. MUREN (1953, 1954)(6,7) and B. ZEDERFELDT (1957)(8) and others have elucidated the effect of technical, local and physiological factors on the rate of healing of skin wounds. It has been shown (e.g. by B. ZEDERFELDT (1957)(8)) that various types of distant trauma retard healing, G. BJORLIN (1954)(2), who investigated the effect of local anaesthesia in the operative field, found this effect to vary considerably with the type of anaesthetic used. He also demonstrated considerable differences between a given anaesthetic solution with and without admixture of adrenaline. B. AF EKENSTAM et. al. (1956)(3) presented the results of the first clinical trial of a new local anaesthetic, Carbocain (R), belonging to a type of chemical compounds which had until then not been known to possess any local anaesthetic effect. It belongs to a group of cyclic acids with pipecolic acid as its acid component. The nitrogen in the piperidin ring is methylated and its aromatic component consists of a bond with the dimethyl analide, and its aromatic component is bonded to the dimethyl. The base is not readily dissolved in water, but is highly soluble and stable in aqueous solutions of hydrochlorides. As to the toxicity of the substance, B. AF EKENSTAM et. al. (1956)(3) found it to compare favourably with that of procaine and lignocaine. G. BJORLIN (1954)(2) found that the use of lignocaine retarded wound healing more than did procaine in corresponding concentrations. This difference was statistically significant. He also found that admixture of adrenaline to the anaesthetic solution delayed wound healing. The retarding effect of a local anaesthetic on the rate of wound healing can be taken as a measure of the local toxicity of the agent. The toxic effect may by composed of various components, such as a direct toxic action on the cells with disturbed scar formation as a, consequence, or vascular constriction in the region involved, with consequent ischaemia disturbing the healing process. The purpose of the present investigation was to assess the tissue toxicity of carbocain in comparison with that of procaine and lignocaine.
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| 38. |
- Nilsson, Lena, et al.
(författare)
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Adverse events are common on the intensive care unit: results from a structured record review
- 2012
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Ingår i: Acta Anaesthesiologica Scandinavica. - Hoboken, USA : Wiley-Blackwell. - 0001-5172 .- 1399-6576. ; 56:8, s. 959-965
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND:Intensive care is advanced and highly technical, and it is essential that, despite this, patient care remains safe and of high quality. Adverse events (AEs) are supposed to be reported to internal quality control systems by health-care providers, but many are never reported. Patients on the intensive care unit (ICU) are at special risk for AEs. Our aim was to identify the incidence and characteristics of AEs in patients who died on the ICUduring a 2-year period.METHODS:A structured record review according to the Global Trigger Tool (GTT) was used to review charts from patients cared for at the ICU of a middle-sized Swedish hospital during 2007 and 2008 and who died during or immediately after ICU care. All identified AEs were scored according to severity and preventability.RESULTS:We reviewed 128 records, and 41 different AEs were identified in 25 patients (19.5%). Health care-associated infections, hypoglycaemia, pressure sores and procedural complications were the most common harmful events. Twenty two (54%) of the AEs were classified as being avoidable. Two of the 41AEs were reported as complications according to the Swedish Intensive Care Registry, and one AE had been reported in the internal AE-reporting system.CONCLUSION:Almost one fifth of the patients who died on the ICU were subjected to harmful events. GTT has the advantage of identifying more patient injuries caused by AEs than the traditional AE-reporting systems used on many ICUs.
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| 39. |
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| 40. |
- Olofsson, K, et al.
(författare)
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Abolished circadian rhythm of melatonin secretion in sedated and artificially ventilated intensive care patients
- 2004
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Ingår i: Acta Anaesthesiologica Scandinavica. - : Wiley. - 0001-5172 .- 1399-6576. ; 48:6, s. 679-684
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Tidskriftsartikel (refereegranskat)abstract
- Background: Sleep disturbance is common in intensive care patients. Aside from its unpleasantness, there is a correlation with intensive care unit (ICU) syndrome/delirium. Reasons for sleep deprivation appear to be multifactorial, including the underlying illness, an acute superimposed disturbance, medications, and the ICU environment itself. There are reasons to believe that alterations of the 'biological clock' might contribute. Melatonin secretion is one reflection of this internal sleep/wake mechanism. Melatonin levels are normally high during the night and low during daytime, being suppressed by bright light. Methods: Melatonin levels in blood and urine were studied over 3 consecutive days in eight critically ill patients during deep sedation and mechanical ventilation. Sedation was assessed with the sedation-agitation (SAS) scale and bispectral index (BIS) monitor. Results: The circadian rhythm of melatonin release was abolished in all but one patient, who recovered much more quickly than the others. There was no correlation between melatonin levels and levels of sedation. Conclusions: This study indicates that dyssynchronization of the melatonin secretion rhythm is common in critically ill and mechanically ventilated patients. It could be hypothesized that an impairment of the melatonin rhythm may play a role in the development of sleep disturbances and delirium in intensive care patients, and that melatonin supply could reduce the incidence of these phenomena.
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| 41. |
- Oscarsson, Anna, et al.
(författare)
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The effect of propofol on actin, ERK-1/2 and GABAA receptor content in neurones
- 2007
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Ingår i: Acta Anaesthesiologica Scandinavica. - : Wiley. - 0001-5172 .- 1399-6576. ; 51:9, s. 1184-1189
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Tidskriftsartikel (refereegranskat)abstract
- Aim: Interaction with the ?-aminobutyric acid receptor (GABA AR) complex is recognized as an important component of the mechanism of many anaesthetic agents, including propofol. The aims of this study were to investigate the effect of propofol on GABAAR, to determine whether exposure of neurones to propofol influences the localization of GABA AR within the cell and to look for cytoskeletal changes that may be connected with activation, such as the mitogen-activated protein kinase (MAPK) pathway. Methods: Primary cortical cell cultures from rat, with and without pre-incubation with the GABAAR antagonist bicuculline, were exposed to propofol. The cells were lysed and separated into membrane and cytosolic fractions. Immunoblot analyses of filamentous actin (F-actin), the GABA A ß2-subunit receptor and extracellular signal-regulated kinase-1/2 (ERK-1/2) were performed. Results: Propofol triggers an increase in GABAAR, actin content and ERK-1/2 phosphorylation in the cytosolic fraction. In the membrane fraction, there is a decrease in GABAA ß2-subunit content and an increase in both actin content and ERK-1/2 phosphorylation. The GABAAR antagonist bicuculline blocks the propofol-induced changes in F-actin, ERK and GABA A ß2-subunit content, and ERK-1/2 phosphorylation. Conclusion: We believe that propofol triggers a dose-dependent internalization of the GABAA ß2-subunit. The increase in internal GABAA ß2-subunit content exhibits a close relationship to actin polymerization and to an increase in ERK-1/2 activation. Actin contributes to the internalization sequestering of the GABAA ß2-subunit. © 2007 Acta Anaesthesiol Scand.
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| 42. |
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| 43. |
- Pikwer, Andreas, et al.
(författare)
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Routine chest X-ray is not required after a low-risk central venous cannulation.
- 2009
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Ingår i: Acta Anaesthesiologica Scandinavica. - : Wiley. - 0001-5172 .- 1399-6576. ; 53, s. 1145-1152
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Tidskriftsartikel (refereegranskat)abstract
- Background: Knowledge of the radiographic catheter tip position after central venous cannulation is normally not required for short-term catheter use. Detection of a possible iatrogenic pneumothorax may nevertheless justify routine post-procedure chest X-ray. Our aim was to design a clinical decision rule to select patients for radiographic evaluation after central venous cannulation. Methods: A total of 2230 catheterizations performed using external jugular, internal jugular or subclavian venous approaches during a 4-year period were included consecutively. Information on patient data and corresponding procedures was recorded prospectively. A post-procedure chest X-ray was obtained after each cannulation. Results: Thirteen cases (0.58%) of cannulation-associated pneumothorax were identified. The risk of pneumothorax after a technically difficult (1.8%) or subclavian (1.6%) cannulation was significantly higher than after cannulation not considered as difficult (0.37%) or performed using other routes (0.33%). Clinical signs of pneumothorax within 8 h of cannulation were found in all seven patients with pneumothorax requiring specific treatment. A new clinical decision rule for radiographic evaluation after central venous cannulation based on the results of the present study shows that 48% of the post-procedure chest X-rays performed in our patients were clinically redundant. Conclusion: Clinical symptoms were reported in all patients with pneumothorax requiring specific treatment. Approximately half of the post-procedure chest X-ray controls could be avoided using the proposed clinical decision rule to select patients for radiographic evaluation after central venous cannulation. A large prospective multi-centre study should be carried out to further evaluate this decision rule.
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| 44. |
- Roscher, Roger, et al.
(författare)
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Effects of dopamine on porcine myocardial action potentials and contractions at 37 degrees C and 32 degrees C
- 2001
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Ingår i: Acta Anaesthesiologica Scandinavica. - : Wiley. - 0001-5172 .- 1399-6576. ; 45:4, s. 421-426
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: Little information exists on the effects of drugs with cardiovascular action in hypothermia, and some findings have indicated paradoxic effects of dopamine in this setting. As we have not found any data on the electrophysiologic and contractile effects of dopamine on the heart in hypothermia, we decided to study this in pig myocardium, since pigs have a cardiovascular system more similar to that of humans than other animals. METHODS: Excised muscle strips from pig ventricular septum were mounted in an organ bath. After 45 min of equilibration at 37 degrees C or 32 degrees C, resting and action potentials, time to peak contraction and contractile force were recorded during pacing with a frequency of 60/min. Dopamine at 4 microM or 8 microM was added and new recordings were made after 15 min. RESULTS: Cooling to 32 degrees C caused a prolongation of contraction by 48% and the contractile force increased by 39%. The membrane action potential duration at 50% and 90% repolarization levels increased at 32 degrees C by 28% and 16% respectively. Dopamine significantly (P<0.05) increased the contractile force and membrane action potential duration at 50% and 90% repolarization levels both in normothermia and in hypothermia, whereas the duration of the contraction was not significantly changed. CONCLUSION: Cooling to 32 degrees C significantly prolongs the myocardial action potential and the contraction duration. Dopamine increases the contractile force and prolongs the action potential both at 37 degrees C and at 32 degrees C.
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| 45. |
- Samuelson, KA, et al.
(författare)
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Light vs. heavy sedation during mechanical ventilation after oesophagectomy : a pilot experimental study focusing on memory.
- 2008
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Ingår i: Acta Anaesthesiologica Scandinavica. - : Wiley. - 0001-5172 .- 1399-6576. ; 52:8, s. 1116-1123
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: To assess and compare the feasibility and stressful memories of light vs. heavy sedation during post-operative mechanical ventilation. METHODS: Randomized clinical trial in one general intensive care unit (ICU) in a Swedish university hospital. Thirty-six adults were randomly assigned to receive either light [Motor Activity Assessment Scale (MAAS) 3-4] or heavy (MAAS 1-2) sedation with continuous i.v. infusion of propofol during post-operative invasive mechanical ventilation after oesophagectomy. The patients were interviewed at the general ward 5 days post-ICU using the ICU Memory Tool and the ICU Stressful Experience Questionnaire, and 2 months post-ICU using the Impact of Event Scale Revised. Patient data and hourly recorded MAAS values were collected after the interviews. RESULTS: Seventy-four per cent of the 139 MAAS values in the light sedation group (n=18) and 79% of the 142 in the heavy sedation group (n=18) were within the targeted levels, and the median MAAS scores were 3.0 vs. 1.25, respectively. Intention-to-treat analyses showed no significant difference in the prevalence of stressful memories between groups, including endotracheal tube discomfort, presenting wide 95% confidence intervals for the difference in outcome estimates. Excluding the patients with a prolonged ICU stay (n=3), a higher prevalence of delusional memories was found in the heavy sedation group (31% vs. 0%, P=0.04). CONCLUSIONS: This small randomized-controlled pilot study suggests that a light sedation regimen during short-term post-operative mechanical ventilation after major surgery is feasible without increasing patient discomfort.
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| 46. |
- Samuelson, Karin, et al.
(författare)
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Stressful memories and psychological distress in adult mechanically ventilated intensive care patients - a 2-month follow-up study
- 2007
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Ingår i: Acta Anaesthesiologica Scandinavica. - : Wiley. - 0001-5172 .- 1399-6576. ; 51:6, s. 671-678
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Tidskriftsartikel (refereegranskat)abstract
- Aim: To investigate patients' psychological distress in relation to memory and stressful experiences in the intensive care unit (ICU), and to identify early predictors for the development of high levels of acute post-traumatic stress disorder (PTSD)-related symptoms. Methods: A prospective cohort study was performed over 18 months in two general ICUs, including 313 intubated mechanically ventilated adults admitted for more than 24 h, 226 of whom completed the study. Patients were interviewed 5 days and 2 months post-ICU concerning their memories and psychological distress. The instruments used were the ICU Memory Tool, ICU Stressful Experience Questionnaire, Hospital Anxiety and Depression Scale and Impact of Event Scale-Revised (IES-R). Results: High symptom levels of anxiety, depression and acute PTSD 2 months post-ICU were present in 4.9%, 7.5% and 8.4% of the 226 patients, respectively. Psychological distress 2 months post-ICU was associated with experiences of the ICU rated as extremely stressful and with high levels of anxiety and depression 5 days post-ICU, but not with amnesia or delusional memories without factual recall of the ICU. Female sex, signs of agitation (increasing proportion of Motor Activity Assessment Scale scores of 4-6) and feelings of extreme fear during the ICU stay were significantly and independently associated with IES-R scores of 30 or more. Conclusions: Extremely stressful experiences of the ICU are associated with subsequent psychological distress. Female sex, agitation and extreme fear during the ICU stay seem to increase the risk of developing high levels of acute PTSD-related symptoms.
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| 47. |
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| 48. |
- Slots, P, et al.
(författare)
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One way to ventilate patients during fibreoptic intubation
- 2001
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Ingår i: Acta Anaesthesiologica Scandinavica. - : Wiley. - 0001-5172 .- 1399-6576. ; 45:4, s. 507-509
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Tidskriftsartikel (refereegranskat)abstract
- Occasionally anaesthesiologists find themselves in situations where ventilation during intubation with a fibreoptic bronchoscope (FOB) is desirable. In order to ventilate the patient during the FOB intubation, we used a 90 degree angle swivel connector, normally used for fibreoptic bronchoscopia in an intubated patient. After a nasotracheal tube is placed with the tip in the oropharynx, ventilation of the patient is possible via this tube by closing the mouth and other nostril. The fibrescopic procedure is done through the right-angle connector with suction port and the tube is used to guide the tip of the FOB to the aditus laryngis. The method has been used in 7 patients who were impossible to intubate with a conventional procedure. In all patients ventilation was possible and intubation was performed in 5 min (range 1-15).
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| 49. |
- Tunblad, K, et al.
(författare)
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Altered brain exposure of morphine in experimental meningitis studied with microdialysis
- 2004
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Ingår i: Acta Anaesthesiologica Scandinavica. - : Wiley. - 0001-5172 .- 1399-6576. ; 48:3, s. 294-301
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Tidskriftsartikel (refereegranskat)abstract
- Background: During pathologic conditions such as meningitis and traumatic brain injury the function of the blood-brain barrier (BBB) is disturbed. In the present study we examined the cerebral pharmacokinetic pattern of morphine in the intact brain and during experimentally induced meningitis using a pig model. Secondly, the use of intracerebral microdialysis as a potential tool for monitoring damage in the BBB by studying the pharmacokinetics of morphine is addressed. Methods: Six pigs were studied under general anaesthesia. One occipital and two frontal microdialysis probes and one pressure transducer were inserted into the brain tissue. Another probe was placed into the jugularis interna. Morphine 1 mg kg(-1) was administered as a 10-min infusion, and morphine concentrations were then measured for 3 h. Meningitis was subsequently induced by injecting lipopolysaccharide into the cisterna magna. When meningitis was established, the morphine experiment was repeated. Results: The unbound area under the concentration-time curve (AUC(u)) ratio of morphine in brain to blood was 0.47 (0.19) during the control period, and 0.95 (0.20) (P<0.001) during meningitis. The increase in the brain/blood AUC(u) ratio during meningitis implies decreased active efflux and increased passive diffusion of morphine over the BBB. The half-life of morphine in brain was longer than in blood during both periods, and was unaffected by meningitis. Conclusion: This study demonstrates that the morphine exposure to the brain is significantly increased during meningitis as compared with the control situation.
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| 50. |
- Wernerman, J., et al.
(författare)
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Scandinavian glutamine trial: a pragmatic multi-centre randomised clinical trial of intensive care unit patients
- 2011
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Ingår i: Acta Anaesthesiologica Scandinavica. - : Blackwell Publishing Ltd. - 0001-5172 .- 1399-6576. ; 55:7, s. 812-818
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Tidskriftsartikel (refereegranskat)abstract
- Background: Low plasma glutamine concentration is an independent prognostic factor for an unfavourable outcome in the intensive care unit (ICU). Intravenous (i.v.) supplementation with glutamine is reported to improve outcome. In a multi-centric, double-blinded, controlled, randomised, pragmatic clinical trial of i.v. glutamine supplementation for ICU patients, we investigated outcomes regarding sequential organ failure assessment (SOFA) scores and mortality. The hypothesis was that the change in the SOFA score would be improved by glutamine supplementation. Methods: Patients (n = 413) given nutrition by an enteral and/or a parenteral route with the aim of providing full nutrition were included within 72 h after ICU admission. Glutamine was supplemented as i.v. L-alanyl-L-glutamine, 0.283 g glutamine/kg body weight/24 h for the entire ICU stay. Placebo was saline in identical bottles. All included patients were considered as intention-to-treat patients. Patients given supplementation for greater than3 days were considered as predetermined per protocol (PP) patients. Results: There was a lower ICU mortality in the treatment arm as compared with the controls in the PP group, but not at 6 months. For change in the SOFA scores, no differences were seen, 1 (0,3) vs. 2 (0.4), P = 0.792, for the glutamine group and the controls, respectively. Conclusion: In summary, a reduced ICU mortality was observed during i.v. glutamine supplementation in the PP group. The pragmatic design of the study makes the results representative for a broad range of ICU patients.
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