What distinguishes septic shock from other types of shock?

• A. Low heart rate
• B. Increased oxygen saturation and cardiac output
• C. Elevated central venous pressure
• D. Cold, clammy extremities

Answer: (B)

Septic shock is characterized by a distinct pathophysiological response to infection, which significantly differentiates it from other types of shock. In septic shock, the body responds to infection with systemic inflammation, leading to vasodilation and increased permeability of blood vessels. This process typically results in high cardiac output as the body attempts to maintain tissue perfusion despite systemic hypotension.

One of the hallmark features of septic shock is the presence of a high or normal cardiac output, contrary to other types of shock such as cardiogenic or hypovolemic shock, where cardiac output is often decreased. Additionally, in septic shock, patients may exhibit increased oxygen saturation due to improved pulmonary perfusion and mixed venous oxygen saturation. This contrasts with other forms of shock where oxygen delivery to tissues is compromised.

The other choices reflect characteristics common in different shock states. Low heart rate is more typically seen in cardiogenic shock. Elevated central venous pressure can also occur in various types of shock, but it does not uniquely distinguish septic shock. Cold, clammy extremities are indicative of peripheral vasoconstriction, which is more common in hypovolemic or cardiogenic shock rather than in septic shock, where the opposite (warm, flushed skin) often presents due to