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- Belachew, Johanna, 1976-
(författare)
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Retained Placenta and Postpartum Haemorrhage
- 2015
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- The aim was to explore the possibility to diagnose retained placental tissue and other placental complications with 3D ultrasound and to investigate the impact of previous caesarean section on placentation in forthcoming pregnancies.3D ultrasound was used to measure the volumes of the uterine body and cavity in 50 women with uncomplicated deliveries throughout the postpartum period. These volumes were then used as reference, to diagnose retained placental tissue in 25 women with secondary postpartum haemorrhage. All but three of the 25 women had retained placental tissue confirmed at histopathology. The volume of the uterine cavity in women with retained placental tissue was larger than the reference in most cases, but even cavities with no retained placental tissue were enlarged (Studies I and II).Women with their first and second birth, recorded in the Swedish medical birth register, were studied in order to find an association between previous caesarean section and retained placenta. The risk of retained placenta with heavy bleeding (>1,000 mL) and normal bleeding (≤1,000 mL) was estimated for 19,459 women with first caesarean section delivery, using 239,150 women with first vaginal delivery as controls. There was an increased risk of retained placenta with heavy bleeding in women with previous caesarean section (adjusted OR 1.61; 95% CI 1.44-1.79). There was no increased risk of retained placenta with normal bleeding (Study III).Placental location, myometrial thickness and Vascularisation Index were recorded on 400 women previously delivered by caesarean section. The outcome was retained placenta and postpartum haemorrhage (≥1,000 mL). There was a trend towards increased risk of postpartum haemorrhage for women with anterior placentae. Women with placenta praevia had an increased risk of retained placenta and postpartum haemorrhage. Vascularisation Index and myometrial thickness did not associate (Study IV).In conclusion: 3D ultrasound can be used to measure the volume of the uterine body and cavity postpartum, but does not increase the diagnostic accuracy of retained placental tissue. Previous caesarean section increases the risk of retained placenta in subsequent pregnancy, and placenta praevia in women with previous caesarean section increases the risk for retained placenta and postpartum haemorrhage.
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| 2. |
- Essving, Per, 1960-
(författare)
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Local infiltration analgesia in knee arthroplasty
- 2012
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Local infiltration analgesia (LIA) is a new technique for postoperative pain management following knee arthroplasty. LIA involves a long-acting local anesthetic (ropivacaine), a non-steroid anti-inflammatory drug (ketorolac) and epinephrine infiltrated into the knee joint during surgery and injected postoperatively via a catheter.In the first two studies, LIA was compared with placebo in unicompartmental (I) and total (II) knee arthroplasty. Postoperative pain levels, morphine consumption and the incidence of side effects were lower in the LIA groups. In addition, we found a shorter length of hospital stay in the LIA group following unicompartmental knee arthroplasty compared with placebo (I), while the time to home readiness was shorter in the LIA group following total knee arthroplasty (II). In this study, we found that the unbound venous blood concentration of ropivacaine was below systemic toxic blood concentrations in a sub-group of patients.In the third study, LIA was compared with intrathecal morphine for postoperative pain relief following total knee arthroplasty (III). Pain scores and morphine consumption were lower, length of hospital stay was shorter and patient satisfaction was higher in the LIA group.In the final study, we investigated the effect of minimally invasive surgery (MIS) compared with conventional surgery in unicompartmental knee arthroplasty (IV). Both groups received LIA. We found no statistically significant differences in postoperative pain, morphine consumption, knee function, home readiness, hospital stay or patient satisfaction.In conclusion, LIA provided better postoperative pain relief and earlier mobilization than placebo, both in unicompartmental and total knee arthroplasty. When compared to intrathecal morphine, LIA also resulted in improved postoperative pain relief and earlier mobilization. Minimally invasive surgery did not improve outcomes after unicompartmental knee arthroplasty, when both groups received LIA.
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| 3. |
- Fant, Federica, 1972-
(författare)
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Optimization of the perioperative anaesthetic care for prostate cancer surgery : clinical studies on pain, stress response and immunomodulation
- 2012
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Prostate cancer (PC) is the most common cancer form in men. Surgery is the treatment of choice for localized form of PC and half of all surgical procedures are radical retropubic prostatectomies (RRP). In the first two studies, we compared the efficacy of thoracic epidural analgesia to patientcontrolled analgesia (PCA) with intravenous morphine (I) and to patientcontrolled local analgesia by intra-abdominal injection of local anaesthetic(LA) (II) in treating postoperative pain after RRP. In studies III and IV we evaluated the effects of thoracic epidural analgesia compared to PCA with morphine in reducing the surgical stress reaction, inflammatory response (III) as well as the immune suppression (IV) following RRP. In studies I and II, we found better pain relief both at rest and on coughing, lower morphine consumption and better respiratory function postoperatively in patients having epidural analgesia. However, we did not register differences in time to home readiness or length of hospital stay. Painmanagement did not significantly affect health-related quality of life. In study III, early surgical stress response (plasma glucose and cortisol) was reduced two hours after the skin incision in patients having epidural analgesia compared with those having intravenous morphine analgesia but no differences in inflammatory mediators were seen except IL-17 which was lower in the epidural group. In study IV, no differences were found between epidural and PCA groups in leucocyte subpopulations, immunecell activation after mitogen stimulation or in natural killer cell cytotoxicityas a measure of innate immunity. We observed a low incidence of side effects and postoperative complications in all studies with no differences between the groups. In summary, thoracic epidural analgesia provided better postoperative pain relief, improved respiratory function and reduction in early stress response to radical retropubic prostatectomy, without any significant effects on inflammation or immune suppression.
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| 4. |
- Perniola, Andrea, 1968-
(författare)
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A new technique for postoperative pain management with local anesthetic after abdominal hysterectomy
- 2013
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- An abdominal hysterectomy (AH) is associated with moderate to severe postoperative pain. In this thesis, a new technique for postoperative pain managment has been studied in 200 patients: local anesthetic (LA) was administered intraperitoneally (IP) after elective AH.In study I, the efficacy of an IP continuous infusion of LA given postoperatively via a catheter was compared with a placebo. The conclusion was that the postoperative pain relief was significantly improved when LA was used. The plasma concentration of LA was far below toxic concentrations.In study II, when three different doses of LA were given at a constant infusion rate, the conclusion was that satisfactory analgesia could be achieved with low doses of LA and that no advantages were seen when higher doses of LA were administered. The highest dose of infused LA did not result in toxic plasma concentration.Study III compared a continuous IP infusion and a patient-controlled bo-lus IP injection of LA. A significant opioid-sparing effect combined with lower required amount of LA was found when the patient-controlled LA was administered compared to the continuous infusion. This was associated with a faster return of gastrointestinal function and home readiness.Study IV tested the hypothesis that the analgesic effect of LA given intermittently IP was superior compared to the same dose administered continuously by intravenous (IV) infusion. A significant opioid-sparing effect was found when an intermittent IP injection of lidocaine was administered. The venous blood concentration of LA was significantly lower in the IP intermittent group versus the IV group. The lower supplemental morphine consumption, coupled with the lower plasma lidocaine concentration, may confirm a local peripheral rather than a systemic effect of LA administered IP.In conclusion, when the LA was injected continuously IP, a significant opioid- sparing effect was found, which did not increase by increasing the LA dose. The opioid-sparing effect was greater when the intermittent IP injection of LA was compared to a continuous infusion. When LA was administered IP, the mechanism of pain relief seemed to be a local rather than a central effect.
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| 5. |
- Seilitz, Jenny, 1978-
(författare)
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The gastrointestinal tract in cardiac anaesthesia and intensive care : Clinical and experimental studies
- 2021
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Gastrointestinal (GI) complications after cardiac surgery have a substantial impact on outcome. The aims were to investigate the frequency of, and methods for detecting, GI dysfunction after cardiac surgery and its relation to outcome, and the impact of vasoactive drugs on the GI tract in experimental cardiogenic shock. Paper I investigated the intraabdominal metabolism, using intraperitoneal microdialysis, during and after routine cardiac surgery in six patients. The results imply that, even during a normal perioperative course, the GI tract may be subjected to a subclinical anaerobic state. In Paper II the impact of stepwise reductions of cardiac output (CO) on the metabolism and circulation in the GI tract was studied in anaesthetised pigs using cardiac tamponade (n=6) or partial inflation of a caval vein balloon (n=6). The two models had similar haemodynamic effects and the intraabdominal metabolism became increasingly anaerobic when the CO was reduced by 50%. In Paper III the caval vein balloon model was utilised to examine the GI effects of two inodilators (levosimendan and milrinone) and two vasoconstrictors (vasopressin and norepinephrine) at 40% CO reduction (n=7/group). Negligible splanchnic vasodilation by the inodilators in fixed low CO, and possible GI specific side effects of high dose vasopressors, were demonstrated. Paper IV included 501 cardiac surgery patients assessed using the Acute Gastrointestinal Injury (AGI) grade. Only 32.7% were asymptomatic during the first three postoperative days. At least GI dysfunction, i.e. AGI grade ≥2, developed in 2.2% and was associated with more complex surgeries and higher postoperative frequencies of GI complications and mortality. In Paper V a biomarker for enterocyte damage, intestinal fatty acid-binding protein (IFABP), was investigated in relation to AGI grade. The group with AGI ≥2 (n=11) was compared to a matched group without GI symptoms (n=22). An I-FABP concentration in the fourth quartile on day one was associated with higher frequencies of organ dysfunction and 365-day mortality. In conclusion, this thesis provides evidence for an association between intraoperative GI injury, postoperative GI dysfunction and manifest complications, and that the effects of inodilators and vasoconstrictors must be considered.
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