Examkin

Question

Difficulty: EasyPharmacologic Interventions

A 72-year-old man is transferred to the intensive care unit with septic shock secondary to a severe intra-abdominal infection. Blood cultures have been drawn and broad-spectrum antimicrobial therapy has been initiated. However, his mean arterial pressure remains below 65 mmHg, and he exhibits signs of poor tissue perfusion. The clinical team proceeds to manage his hemodynamic instability according to standard sepsis resuscitation guidelines. Arrange the following pharmacologic interventions in the correct sequential order of escalation for the treatment of his persistent hypotension.

  1. 1Administer a rapid bolus of intravenous crystalloids
  2. 2Initiate an intravenous norepinephrine continuous infusion
  3. 3Add an intravenous vasopressin continuous infusion
  4. 4Administer intravenous hydrocortisone

Answer

The correct sequence of escalation is: 1) intravenous crystalloids, 2) intravenous norepinephrine, 3) intravenous vasopressin, and 4) intravenous hydrocortisone.
Hemodynamic stabilization in septic shock follows a standardized protocol. The foundation of treatment is restoring intravascular volume with a rapid bolus of intravenous crystalloids. If target perfusion is not met, the first-line vasopressor, norepinephrine, is initiated. For patients who require escalating doses of norepinephrine, a second vasopressor, typically vasopressin, is added to augment blood pressure and spare catecholamine toxicity. Finally, if the patient remains hypotensive despite adequate fluids and vasopressors, intravenous hydrocortisone is administered to treat suspected critical illness-related corticosteroid insufficiency.

Step-by-Step Solution

1
Identify the primary intervention for volume depletion and hypotension in sepsis.
Intravenous crystalloids.
Sepsis causes widespread vasodilation and capillary leak. Filling the intravascular space with fluids is the mandatory first step before initiating vasoactive agents.
2
Determine the first-line vasopressor for fluid-refractory shock.
Intravenous norepinephrine continuous infusion.
If the mean arterial pressure remains <65 mmHg after initial fluid boluses, norepinephrine is the preferred initial vasopressor due to its potent alpha-1 adrenergic effects.
3
Determine the adjunctive vasopressor for escalating support.
Intravenous vasopressin continuous infusion.
When norepinephrine alone is insufficient, adding vasopressin can help achieve the target blood pressure without increasing the toxicity of high-dose catecholamines.
4
Identify the intervention for vasopressor-refractory shock.
Intravenous hydrocortisone.
In cases of refractory septic shock, relative adrenal insufficiency is often present, making hydrocortisone the final pharmacologic step in the standard hemodynamic escalation pathway.

Key Concept

The hemodynamic escalation protocol for septic shock progresses sequentially from fluid resuscitation (crystalloids) to a first-line vasopressor (norepinephrine), followed by an adjunctive vasopressor (vasopressin), and finally corticosteroids (hydrocortisone) for refractory shock.
Rate this question

Topics

Pharmacologic Interventions

More questions from this topic