Related Experiment Videos
[Effects induced hypothermia on hepatic portal circulation]
A Escalda1, L Silva Carvalho, L Laranjeira
1Instituto de Fisiologia, Faculdade de Medicina de Lisboa, Lisbonne.
Comptes Rendus Des Seances De La Societe De Biologie Et De Ses Filiales
|January 1, 1988
Summary
Hypothermia in dogs significantly reduces liver portal blood flow due to pre-capillary sphincter contraction. This vascular resistance occurs without notable changes in blood pressure during cooling.
Area of Science:
- Physiology
- Hepatology
- Cardiovascular Science
Context:
- Investigating the physiological responses of liver circulation during induced hypothermia in canine models.
- Understanding the impact of low body temperatures on splanchnic blood flow and hepatic hemodynamics.
Purpose:
- To elucidate the mechanisms behind altered portal blood flow during hypothermia.
- To determine the role of vascular resistance and sphincter activity in hepatic circulation under cold stress.
Summary:
- Studies in dogs demonstrated a reduction in portal blood flow during hypothermia.
- This decrease correlated with increased vascular resistance, likely caused by precapillary sphincter contraction.
- Mean arterial blood pressure remained largely unchanged, indicating a localized effect within the liver's vasculature.
Impact:
- Provides insights into the pathophysiology of hypothermia on organ perfusion.
- Informs potential therapeutic strategies for managing liver function during hypothermic conditions.
- Contributes to the understanding of vascular control mechanisms in the splanchnic system.