Review Note
Last Update: 12/13/2023 09:07 PM
Current Deck: 1 CRNA::Apex Ankisthesia::Ankisthesia::M&M::45 Spinal, Epidural, and Caudal Blocks
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Neuraxial blocks typically impact hemodynamics by causing {{c1::hypotension}} and {{c1::bradycardia}}.
Extra
- These effects are exagerated if venous pooling is further augmented by a head-up position or the weight of gravid uterus
more cephalad dermatomal levels and more extensive sympathectomy.
Vasomotor tone is primarily determined by sympathetic fibers arising from T5 - L1, innervating arterial and venous smooth muscle.
Blocking these nerves causes vasodilation of the venous capacitance vessels and pooling of blood in the viscera and lower extremities, thereby decreasing
the effective circulating blood volume and often decreasing cardiac output.
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