What is the goal of vasopressor therapy?

Choice A rationale Vasopressors are used to increase blood pressure in hypotensive patients, not to decrease it in hypertensive ones. Medications used to lower blood pressure are called antihypertensives or vasodilators. Administering a vasopressor to a hypertensive patient would be dangerous, as it would further increase systemic vascular resistance and could lead to a stroke or myocardial infarction. The therapeutic goal is always to move the pressure toward a normal range from a low state. Choice B rationale The standard clinical goal for vasopressor therapy in most shock states is to achieve a Mean Arterial Pressure of at least 65 mmHg. This value is considered the minimum threshold necessary to ensure adequate perfusion to vital organs, particularly the kidneys and the brain. Maintaining a MAP ≥ 65 mmHg helps prevent the transition from reversible cellular injury to irreversible organ damage. This goal is supported by major clinical guidelines, including the Surviving Sepsis Campaign. Choice C rationale While maintaining normothermia is important for enzyme function and coagulation, it is not the primary goal of vasopressor therapy. Vasopressors work by causing vasoconstriction or increasing heart contractility to improve hemodynamics. While peripheral vasoconstriction might slightly reduce heat loss through the skin, the intended effect is purely circulatory. Temperature control is managed through external warming devices or cooled fluids, depending on the specific needs of the patient and their clinical condition. Choice D rationale While a MAP of 70 mmHg is certainly healthy, aiming for a MAP greater than 70 specifically is not the standard minimum requirement for vasopressor titration in general shock protocols. Setting the target too high can lead to unnecessary complications, such as excessive vasoconstriction, which can cause digital ischemia or increased afterload on the heart. Clinical evidence suggests that targeting a MAP of 65 is sufficient for most patients to maintain organ function without causing these harmful side effects.