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Sökning: WFRF:(Jonsson Anders)

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  • Axelsson, Christer, et al. (författare)
  • The Early Chain of Care in Patients with Bacteraemia with the Emphasis on the Prehospital Setting
  • 2016
  • Ingår i: Prehospital and Disaster Medicine. - : Cambridge University Press. - 1049-023X .- 1945-1938. ; 31:3, s. 272-277
  • Tidskriftsartikel (refereegranskat)abstract
    • There is a lack of knowledge about the early phase of severe infection. This report describes the early chain of care in bacteraemia as follows: (a) compare patients who were and were not transported by the Emergency Medical Services (EMS); (b) describe various aspects of the EMS chain; and (c) describe factors of importance for the delay to the start of intravenous antibiotics. It was hypothesized that, for patients with suspected sepsis judged by the EMS clinician, the delay until the onset of antibiotic treatment would be shorter.All patients in the Municipality of Gothenburg (Sweden) with a positive blood culture, when assessed at the Laboratory of Bacteriology in the Municipality of Gothenburg, from February 1 through April 30, 2012 took part in the survey.In all, 696 patients fulfilled the inclusion criteria. Their mean age was 76 years and 52% were men. Of all patients, 308 (44%) had been in contact with the EMS and/or the emergency department (ED). Of these 308 patients, 232 (75%) were transported by the EMS and 188 (61%) had “true pathogens” in blood cultures. Patients who were transported by the EMS were older, included more men, and suffered from more severe symptoms and signs.The EMS nurse suspected sepsis in only six percent of the cases. These patients had a delay from arrival at hospital until the start of antibiotics of one hour and 19 minutes versus three hours and 21 minutes among the remaining patients (P =.0006). The corresponding figures for cases with “true pathogens” were one hour and 19 minutes versus three hours and 15 minutes (P =.009).Among patients with bacteraemia, 75% used the EMS, and these patients were older, included more men, and suffered from more severe symptoms and signs. The EMS nurse suspected sepsis in six percent of cases. Regardless of whether or not patients with true pathogens were isolated, a suspicion of sepsis by the EMS clinician at the scene was associated with a shorter delay to the start of antibiotic treatment.
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  • Barbateskovic, Marija, et al. (författare)
  • A new tool to assess Clinical Diversity In Meta-analyses (CDIM) of interventions
  • 2021
  • Ingår i: Journal of Clinical Epidemiology. - : Elsevier BV. - 0895-4356 .- 1878-5921. ; 135, s. 29-41
  • Tidskriftsartikel (refereegranskat)abstract
    • Objective: To develop and validate Clinical Diversity In Meta-analyses (CDIM), a new tool for assessing clinical diversity between trials in meta-analyses of interventions. Study design and setting: The development of CDIM was based on consensus work informed by empirical literature and expertise. We drafted the CDIM tool, refined it, and validated CDIM for interrater scale reliability and agreement in three groups. Results: CDIM measures clinical diversity on a scale that includes four domains with 11 items overall: setting (time of conduct/country development status/units type); population (age, sex, patient inclusion criteria/baseline disease severity, comorbidities); interventions (intervention intensity/strength/duration of intervention, timing, control intervention, cointerventions); and outcome (definition of outcome, timing of outcome assessment). The CDIM is completed in two steps: first two authors independently assess clinical diversity in the four domains. Second, after agreeing upon scores of individual items a consensus score is achieved. Interrater scale reliability and agreement ranged from moderate to almost perfect depending on the type of raters. Conclusion: CDIM is the first tool developed for assessing clinical diversity in meta-analyses of interventions. We found CDIM to be a reliable tool for assessing clinical diversity among trials in meta-analysis.
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4.
  • Otero, Jaime, et al. (författare)
  • Basin-scale phenology and effects of climate variability on global timing of initial seaward migration of Atlantic salmon (Salmo salar)
  • 2014
  • Ingår i: Global Change Biology. - : Wiley. - 1354-1013 .- 1365-2486. ; 20:1, s. 61-75
  • Tidskriftsartikel (refereegranskat)abstract
    • Migrations between different habitats are key events in the lives of many organisms. Such movements involve annually recurring travel over long distances usually triggered by seasonal changes in the environment. Often, the migration is associated with travel to or from reproduction areas to regions of growth. Young anadromous Atlantic salmon (Salmo salar) emigrate from freshwater nursery areas during spring and early summer to feed and grow in the North Atlantic Ocean. The transition from the freshwater ('parr') stage to the migratory stage where they descend streams and enter salt water ('smolt') is characterized by morphological, physiological and behavioural changes where the timing of this parr-smolt transition is cued by photoperiod and water temperature. Environmental conditions in the freshwater habitat control the downstream migration and contribute to within- and among-river variation in migratory timing. Moreover, the timing of the freshwater emigration has likely evolved to meet environmental conditions in the ocean as these affect growth and survival of the post-smolts. Using generalized additive mixed-effects modelling, we analysed spatio-temporal variations in the dates of downstream smolt migration in 67 rivers throughout the North Atlantic during the last five decades and found that migrations were earlier in populations in the east than the west. After accounting for this spatial effect, the initiation of the downstream migration among rivers was positively associated with freshwater temperatures, up to about 10 °C and levelling off at higher values, and with sea-surface temperatures. Earlier migration occurred when river discharge levels were low but increasing. On average, the initiation of the smolt seaward migration has occurred 2.5 days earlier per decade throughout the basin of the North Atlantic. This shift in phenology matches changes in air, river, and ocean temperatures, suggesting that Atlantic salmon emigration is responding to the current global climate changes.
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5.
  • Vukusic, Kristina, 1979, et al. (författare)
  • The Atrioventricular Junction: A Potential Niche Region for Progenitor Cells in the Adult Human Heart
  • 2019
  • Ingår i: Stem Cells and Development. - : Mary Ann Liebert Inc. - 1547-3287 .- 1557-8534. ; 28:16, s. 1078-1088
  • Tidskriftsartikel (refereegranskat)abstract
    • A stem cell niche is a microenvironment where stem cells reside in a quiescent state, until activated. In a previous rat model, we combined 5-bromo-2-deoxy-uridine labeling with activation of endogenous stem cells by physical exercise and revealed a distinct region, in the atrioventricular junction (AVj), with features of a stem cell niche. In this study, we aim to investigate whether a similar niche exists in the human heart. Paired biopsies from AVj and left ventricle (LV) were collected both from explanted hearts of organ donors, not used for transplantation (N = 7) and from severely failing hearts from patients undergoing heart transplantation (N = 7). Using antibodies, we investigated the expression of stem cell, hypoxia, proliferation and migration biomarkers. In the collagen-dense region of the AVj in donor hearts, progenitor markers, MDR1, SSEA4, ISL1, WT1, and hypoxia marker, HIF1-alpha, were clearly detected. The expression gradually decreased with distance from the valve. At the myocardium border in the AVj costaining of the proliferation marker Ki67 with cardiomyocyte nuclei marker PCM1 and cardiac Troponin-T (cTnT) indicated proliferation of small cardiomyocytes. In the same site we also detected ISL1(+)/WT1(+)/cTnT cells. In addition, heterogeneity in cardiomyocyte sizes was noted. Altogether, these findings indicate different developmental stages of cardiomyocytes below the region dense in stem cell marker expression. In patients suffering from heart failure the AVj region showed signs of impairment generally displaying much weaker or no expression of progenitor markers. We describe an anatomic structure in the human hearts, with features of a progenitor niche that coincided with the same region previously identified in rats with densely packed cells expressing progenitor and hypoxia markers. The data provided in this study indicate that the adult heart contains progenitor cells and that AVj might be a specific niche region from which the progenitors migrate at the time of regeneration.
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  • Akerstrom, Finn, et al. (författare)
  • Association between catheter ablation of atrial fibrillation and mortality or stroke
  • 2024
  • Ingår i: Heart. - : BMJ PUBLISHING GROUP. - 1355-6037 .- 1468-201X. ; 110, s. 163-169
  • Tidskriftsartikel (refereegranskat)abstract
    • Objective Catheter ablation of atrial fibrillation effectively reduces symptomatic burden. However, its long-term effect on mortality and stroke is unclear. We investigated if patients with atrial fibrillation who undergo catheter ablation have lower risk for all-cause mortality or stroke than patients who are managed medically. Methods We retrospectively included 5628 consecutive patients who underwent first-time catheter ablation for atrial fibrillation between 2008 and 2018 at three major Swedish electrophysiology units. Control individuals with an atrial fibrillation diagnosis but without previous stroke were selected from the Swedish National Patient Register, resulting in a control group of 48 676 patients. Propensity score matching was performed to produce two cohorts of equal size (n=3955) with similar baseline characteristics. The primary endpoint was a composite of all-cause mortality or stroke. Results Patients who underwent catheter ablation were healthier (mean CHA(2)DS(2)-VASc score 1.4 +/- 1.4 vs 1.6 +/- 1.5, p<0.001), had a higher median income (288 vs 212 1000 Swedish krona [KSEK]/year, p<0.001) and had more frequently received university education (45.1% vs 28.9%, p<0.001). Mean follow-up was 4.5 +/- 2.8 years. After propensity score matching, catheter ablation was associated with lower risk for the combined primary endpoint (HR 0.58, 95% CI 0.48 to 0.69). The result was mainly driven by a decrease in all-cause mortality (HR 0.51, 95% CI 0.41 to 0.63), with stroke reduction showing a trend in favour of catheter ablation (HR 0.75, 95% CI 0.53 to 1.07). Conclusions Catheter ablation of atrial fibrillation was associated with a reduction in the primary endpoint of all-cause mortality or stroke. This result was driven by a marked reduction in all-cause mortality.
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9.
  • Ambjörnsson, Joakim, et al. (författare)
  • Prehospital suspicion and identification of adult septic patients : Experiences of a screening tool
  • 2016
  • Ingår i: 2nd Global Conference on Emergency Nursing and Trauma Care, Melia Sitges, September 22-24, 2016.
  • Konferensbidrag (refereegranskat)abstract
    • Introduction: Sepsis is life threatening and requires urgent healthcare to reduce suffering and death. Therefore it is important that septic patients are identified early to enable treatment. Aim: To investigate to what extent EMS personnel identified patients with sepsis using the “BAS 90-30-90” model, and to describe assessments and medical procedures that were undertaken by the personnel.Methods: This was a retrospective study where 185 EMS medical records were reviewed. The inclusion was based on patients who were later diagnosed with sepsis in the hospital. Results: A physician assessed the patients in 74 of the EMS cases, which lead to exclusion of these records in regard to the EMS personnel’s ability to identify sepsis. The personnel documented suspicion of severe sepsis in eight (n=8) of the remaining 111 records (7.2%). The proportion of patients ˃65 years of age was 73% (n=135) of which 37% (n=50) were over 80 years old. Thirty-nine percent (39%, n=72) were females. The personnel documented blood pressure in 91% (n=168), respiratory rate in 76% (n=140), saturation in 100% (n=185), temperature in 76% (n=141), and heart rate in 94% (n=174) of the records. Systolic blood pressure <90 mmHg was documented in 14,2% (n=24), respiratory rate ˃30 in 36% (n=50), saturation <90 in 49%  (n=91), temperature >38°C in 37.6% (n=53), and heart rate ˃90 in 70% (n=121) of the records. Documented medical procedures and treatments were intravenous lines (70%, n=130), intravenous fluids (10%, n=19) and administration of oxygen (72%, n=133).Conclusion: The EMS personnel identified only a few septic patients with the help of the BAS 90-30-90 model when all three criteria would be met for severe sepsis. Either advanced age (>65 years), fever (>38°C) or tachypnea (˃20 breaths/min) appeared to increase the personnel’s suspicion of sepsis. Oxygen, but not intravenous fluids, was given in an adequate way.
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