Which induction agent is preferred for a patient who is hypotensive or has bronchospasm?

Which induction agent is preferred for a patient who is hypotensive or has bronchospasm?

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

Answer: (B)

In a patient who is hypotensive or has bronchospasm, you want an induction agent that both preserves or increases hemodynamic stability and provides bronchodilation. Ketamine fits this well because it tends to increase blood pressure and cardiac output by stimulating sympathetic activity and inhibiting norepinephrine reuptake, which helps counteract hypotension. It also has bronchodilatory properties, easing airway resistance and helping to treat bronchospasm during induction. It typically preserves spontaneous respiration, which can be advantageous in a reactive airway or unstable patient. Other agents tend to lower blood pressure or depress respiration. Propofol and midazolam cause vasodilation and myocardial depression, which can worsen hypotension and potentially worsen bronchospasm. Etomidate is hemodynamically stable but does not provide bronchodilation, making it less ideal when bronchospasm is a major concern.

In a patient who is hypotensive or has bronchospasm, you want an induction agent that both preserves or increases hemodynamic stability and provides bronchodilation. Ketamine fits this well because it tends to increase blood pressure and cardiac output by stimulating sympathetic activity and inhibiting norepinephrine reuptake, which helps counteract hypotension. It also has bronchodilatory properties, easing airway resistance and helping to treat bronchospasm during induction. It typically preserves spontaneous respiration, which can be advantageous in a reactive airway or unstable patient.

Other agents tend to lower blood pressure or depress respiration. Propofol and midazolam cause vasodilation and myocardial depression, which can worsen hypotension and potentially worsen bronchospasm. Etomidate is hemodynamically stable but does not provide bronchodilation, making it less ideal when bronchospasm is a major concern.