Sunday, January 4, 2009

Chemical sympathectomy-induced changes in TH-, VIP-, and CGRP-immunoreactive fibers

Journal of Cellular Physiology

Volume 194 Issue 3, Pages 341 - 348

Published Online: 10 Jan 2003

http://www3.interscience.wiley.com/journal/102523100/abstract

Heat loss due to sympathectomy-induced vasodilation

Hypothermia (a decrease in core temperature) is common in patients undergoing surgery with epidural anesthesia an is thought to result from heat loss to the cold environment due to sympathectomy-induced vasodilation.
Sympathectomy-induced vasodilation produced central hypothermia via net convection of the heat from the warmer central to cooler peripheral tissues. The net effect is an increase in peripheral tissue temperature at the expense of decreased central temperature.

Neural Blockade in Clinical Anesthesia and Management of Pain
By Michael J. Cousins, Phillip O. Bridenbaugh
Contributor Michael J. Cousins
Published by Lippincott Williams & Wilkins, 1997
p. 277