In a placenta previa patient with hypotension and active bleeding, which induction agent would be preferred to maintain hemodynamics?

In a placenta previa patient with hypotension and active bleeding, which induction agent would be preferred to maintain hemodynamics?

• A. Thiopental
• B. Propofol
• C. Ketamine
• D. Etomidate

Answer: (C)

In this situation the priority is preserving maternal blood pressure to maintain uteroplacental perfusion during a bleeding obstetric emergency. Ketamine stands out because its induction effect is accompanied by sympathetic stimulation that increases heart rate, blood pressure, and systemic vascular resistance. This helps counteract the hypotension from血 loss and supports stable perfusion to both mother and fetus, which is crucial in placenta previa with active bleeding. Ketamine also tends to preserve airway reflexes and spontaneous breathing to some extent, which can be advantageous in a unstable patient. Other agents tend to lower blood pressure. Thiopental and propofol cause vasodilation and myocardial depression, often worsening hypotension in a patient who is actively bleeding. Etomidate is hemodynamically stable, but it does not provide the same protective effect on blood pressure as ketamine, and it carries concerns about adrenal suppression with repeated use. Therefore, ketamine is the best choice to maintain hemodynamics in this scenario.

In this situation the priority is preserving maternal blood pressure to maintain uteroplacental perfusion during a bleeding obstetric emergency. Ketamine stands out because its induction effect is accompanied by sympathetic stimulation that increases heart rate, blood pressure, and systemic vascular resistance. This helps counteract the hypotension from血 loss and supports stable perfusion to both mother and fetus, which is crucial in placenta previa with active bleeding. Ketamine also tends to preserve airway reflexes and spontaneous breathing to some extent, which can be advantageous in a unstable patient.

Other agents tend to lower blood pressure. Thiopental and propofol cause vasodilation and myocardial depression, often worsening hypotension in a patient who is actively bleeding. Etomidate is hemodynamically stable, but it does not provide the same protective effect on blood pressure as ketamine, and it carries concerns about adrenal suppression with repeated use. Therefore, ketamine is the best choice to maintain hemodynamics in this scenario.