Experimental Model of Partially Recovered Blood Loss in Awake Rats.

Abstract

We propose a new model of blood loss in awake rats with volume loss up to 40% of total blood volume in the phase of hemorrhagic shock and partial blood replacement up to final blood loss up to 30% of total blood volume. During blood withdrawal, the rats showed manifestation of baroreflex, increased blood levels of glucose and lactate, and decreased concentration of oxyhemoglobin. Partial blood volume compensation was followed by recovery of hemodynamics the levels of glucose and oxyhemoglobin. Thus, taking into account the awake status of rats and compensatory mechanisms, our model of blood loss with a fixed volume of blood drawing and its partial compensation is a relevant model for studying the efficacy of blood substitutes.