Abstract
This study aimed to evaluate the variations of infrared thermography according to rapid hemodynamic changes, by measuring the peripheral skin temperature in a porcine model. Eight healthy piglets were anesthetized and exposed to different levels of arterial pressure. Thermography was performed on the left forelimb to measure carpus and elbow skin temperature and their associated gradient with the core temperature. Changes in skin temperature in response to variations of blood pressure were observed. A negative correlation between arterial pressure and temperature gradients between peripheral and core temperature and a negative correlation between cardiac index and these temperature gradients were observed. Thermography may serve as a tool to detect early changes in peripheral perfusion.
Highlights
Shock is defined as a life-threatening, generalized form of acute circulatory failure associated with inadequate oxygen utilization by the cells [1]
This study aimed to evaluate the potential interest of Infrared thermography (IT) as a tool to detect variations of peripheral perfusion associated with pharmacologically induced rapid hemodynamic changes, in a porcine model
The current study provides new insights on the correlation between systemic hemodynamic parameters and the peripheral to central temperature gradients
Summary
Shock is defined as a life-threatening, generalized form of acute circulatory failure associated with inadequate oxygen utilization by the cells [1] In this critical condition, circulation fails to deliver sufficient oxygen to meet the tissues demand. In the time-course of circulatory failure, compensatory mechanisms occur to redistribute blood from non-vital organs to vital organs [1,4]. This leads to signs of poor peripheral perfusion including decreased capillary refill time, cold extremities, skin mottling and decreased peripheral pulses [1,4,5,6]. The mortality rate associated with septic shock is about 30 to 80% [7]
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