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Plausible reasons for lack of hypotensive responses after neuraxial anesthesia in infants include

a) Immaturity of sodium channels causing weaker local anesthetic effects

b) Sympathetic predominance in infants

c) Parasympathetic activity withdrawal

d) All the above

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Answer

Answer c. In addition to blockade of parasympathetic outflow, experts have theorized that the decreased blood volume in the lower half of the body in infants as compared to adults contributes to the observed lack of hypotension even with thoracic neuraxial blockade.

Notes

This question originally printed in the Pediatric Anesthesiology Review Topics kindle book series, and appears courtesy of Naerthwyn Press, LLC.

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