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Sökning: swepub > Larsson Anders > Tidskriftsartikel > Övrigt vetenskapligt

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  • Lipcsey, Miklós, et al. (författare)
  • Inflammatory, coagulatory and circulatory responses to logarithmic increases in the endotoxin dose in the anaesthetised pig
  • 2006
  • Ingår i: Journal of Endotoxin Research. - 0968-0519. ; 12:2, s. 99-112
  • Tidskriftsartikel (övrigt vetenskapligt)abstract
    • Although porcine intravenous endotoxin shock models are widely employed in experimental sepsis, endotoxin dose-effect studies are scarce. Our primary aim was to establish the dose response to increasing endotoxin doses in inflammatory, coagulatory and haemodynamic effect variables, as well as to determine the optimal time point for assessment in a pig model. A secondary aim was to study pathophysiological covariations between the different responses. Twenty anaesthetised piglets received endotoxin intravenously in doses of 0.063 (n = 3), 0.25 (n = 3), 1.0 (n = 3), 4.0 (n = 3), 8 (n = 3) and 16 microg/kg/h (n = 2). In addition, non-endotoxin piglets constituted a control group (n = 3). Physiological variables were registered and blood samples analysed for TNF-alpha, IL-6, leukocyte, platelet and haemoglobin concentrations hourly for 6 h. Increases in the endotoxin dose induced significant log-log cytokine responses as well as log-linear leukocyte and platelet responses. Significant log-linear responses were observed for circulatory parameters, plasma leakage, hypoperfusion and pulmonary compliance. Significant covariations in the responses were noted. In conclusion, there were log-log or log-linear responses to endotoxin suggesting a greater effect of a given dose at lower pre-existing endotoxin concentrations and lower doses of < or = 1 microg/kg/h may be of advantage in experiments designed to study potential anti-endotoxin effects of experimental drugs or measures.
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  • Akhter, Tansim, et al. (författare)
  • Changes in the Artery Wall Layer Dimensions in Women with Preeclampsia : an investigation using non-invasive high frequency ultrasound
  • 2012
  • Ingår i: Acta Obstetricia et Gynecologica Scandinavica. - 0001-6349. ; 91:S159, s. 28-28
  • Tidskriftsartikel (övrigt vetenskapligt)abstract
    • Background:Preeclampsia (PE) is associated with increased risk for cardiovascular disease later in life. Whether, the artery wall layer dimensions differ between PE and normal pregnancy is unclear. The aim of this study was to estimate if women with PE have different common carotid artery wall layer dimensions than women with normal pregnancy, both during pregnancy and about one year postpartum.Methods:By using high-frequency (22MHz) ultrasound (Collagenoson, Meudt, Germany) separate estimates of the common carotid artery intima and media layers were obtained and the I/M ratio was calculated in women with PE (n=55 during pregnancy and n=48 at postpartum) and with normal pregnancy (n=65 during pregnancy and n=59 at postpartum). Thick intima, thin media and a high intima/media ratio are signs of less healthy artery wall and vice versa.Results:In women with PE, the intima was thicker (0.18 } 0.03 vs. 0.11 } 0.02; p < .001), the media was thinner (0.47 } 0.12 vs. 0.55 } 0.14; p = .001) and the I/M ratio was higher (0.41 } 0.14 vs. 0.20 } 0.05; p < .001) compared to women with normal pregnancy. Further, for changes from pregnancy to postpartum, both for PE and normal pregnancy, the intima and the I/M ratio had improved but still significantly higher in women with PE than in women with normal pregnancy.Conclusion:In women with PE, we found a thicker intima, thinner media and a higher I/M ratio compared to women with normal pregnancy, indicating a more negatively affected artery wall layer dimensions. Persisting negative effects of PE on artery wall at postpartum, despite improvement of artery wall layers compared to values during pregnancy, indicates a permanent damage of the vascular system in this group of women.
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