The term 'shock' is used to describe a complex, life-threatening clinical condition that arises from acute circulatory failure. Shock is a pathological state that results when the circulation is unable to deliver sufficient oxygen and nutrients to the cells and tissues. The resulting hypoxia, tissue hypoperfusion and cellular dysfunction can lead to multi-organ failure; if this is not treated in a timely and appropriate manner, it can lead to death. This article gives an introduction to shock with an overview of the condition and its physiological impact on patients. Focusing on the aetiology and underlying causes, discussion will highlight the different types, stages and general pathophysiology of shock, as well as providing a guide to treatment options and nursing interventions.
Keywords: Acute circulatory failure; Compensatory mechanisms; Hypovolaemia; Shock; Sympathetic response.