Shock is a common manifestation of many forms of critical illness. Although a patient with hypotension can have shock, shock is not necessarily defined by hypotension. That is, a patient can have a “normal” blood pressure and have shock concurrently. Accordingly, the definition of shock is based upon the concepts of oxygen delivery, the circulation-related factors that govern oxygen delivery, and tissue oxygen requirements. When tissue oxygen requirements are not met by the circulatory system, be it due to poor myocardial function, hypovolemia, and/or hypotension, a patient is said to be in shock.
KeywordsSeptic Shock Cardiogenic Shock Oxygen Delivery Hemorrhagic Shock Pulmonary Artery Catheter
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