What type of shock is characterized by a change in blood vessels?

The type of shock characterized by a change in blood vessels is peripheral circulatory shock. This condition involves alterations in the blood vessel's ability to constrict or dilate appropriately, leading to inadequate blood flow to the tissues. Peripheral circulatory shock often arises from conditions that disrupt the vascular system, such as severe infections or anaphylaxis, where blood vessels widen excessively (vasodilation). This can result in decreased systemic vascular resistance and lead to inadequate perfusion of vital organs.

In this type of shock, the underlying cause is primarily related to the failure of the vascular system's ability to maintain adequate blood pressure and volume, rather than issues with the heart or blood volume itself. This distinguishes it from cardiogenic shock, which is related to heart function, and hypovolemic shock, which is directly tied to reduced blood volume. Anaphylactic shock, while often causing peripheral circulatory changes due to extreme allergic reactions, is considered a specific subtype of shock that includes systemic effects, such as vasodilation and increased permeability, making it less general than the broader category of peripheral circulatory shock.