Feline Shock Study Guide

Overview and Clinical Importance

Shock is defined as a state of inadequate cellular energy production due to insufficient oxygen delivery to tissues. In cats, shock represents a critical emergency with unique species-specific manifestations that differ significantly from dogs. Understanding these feline-specific presentations is essential for NAVLE success and clinical practice.

The feline response to shock is characterized by the classic triad of bradycardia, hypotension, and hypothermia, which contrasts sharply with the tachycardic compensatory response typically seen in dogs. This unique presentation occurs because cats have vagal fibers located close to sympathetic fibers, and hypotension can stimulate both pathways simultaneously.

Pathophysiology of Shock

At the cellular level, shock occurs when oxygen delivery (DO2) is insufficient to meet tissue oxygen consumption (VO2). Oxygen delivery depends on three critical factors: cardiac output (CO), hemoglobin concentration (Hb), and arterial oxygen saturation (SaO2).