Open AccessEffects of Ephedrine on Indocyanine Green Clearance During Spinal Anesthesia
Author(s) -
Masayasu Nakayama,
Noriaki Kanaya,
Satoshi Fujita,
Akiyoshi Namiki
Publication year - 1993
Publication title -
anesthesia and analgesia/anesthesia and analgesia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.404
H-Index - 201
eISSN - 1526-7598
pISSN - 0003-2999
DOI - 10.1213/00000539-199311000-00013
Subject(s) - medicine , indocyanine green , ephedrine , anesthesia , blood pressure , hemodynamics , heart rate , blood flow , stroke volume , cardiac index , cardiac output , surgery , cardiology
We measured indocyanine green (ICG) clearance in 20 patients scheduled for elective surgery during spinal anesthesia to determine whether ephedrine affects the hepatic circulation during spinal anesthesia. The clearance was measured by a new noninvasive finger piece method. We found that a decrease in arterial blood pressure secondary to spinal anesthesia significantly reduced ICG, whereas there were no significant changes in ICG clearance in the patients whose arterial blood pressures were maintained at preanesthetic levels by ephedrine. Other hemodynamic variables, heart rate, cardiac index, and stroke volume index, did not change significantly in either group. We conclude that hepatic blood flow is decreased by hypotension due to spinal anesthesia and can be attenuated by ephedrine administration.