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Optimal Concentration of Epinephrine for Vasoconstriction in Neck Surgery
Author(s) -
Dunlevy Timothy M.,
O'Malley Timothy P.,
Postma Gregory N.
Publication year - 1996
Publication title -
the laryngoscope
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.181
H-Index - 148
eISSN - 1531-4995
pISSN - 0023-852X
DOI - 10.1097/00005537-199611000-00020
Subject(s) - epinephrine , vasoconstriction , anesthesia , medicine , lidocaine , hemostasis , blood flow , cardiology , surgery
The addition of epinephrine to local anesthetics decreases bleeding, reduces systemic toxicity, and increases duration of action. However, epinephrine has significant side effects. Four concentrations of epinephrine were compared to determine the minimum concentration required for maximal vasoconstriction. Eighty‐one subjects undergoing surgical procedures with general anesthesia were injected with 1% lidocaine containing varying concentrations of epinephrine. Blood flow measurements were then made at 1‐minute intervals for 10 minutes using a laser Doppler flowmeter. There were no differences in blood flow reduction between epinephrine concentrations of 1:100,000, 1:200,000, and 1:400,000. However, epinephrine 1:800,000 provided significantly less vasoconstriction. We recommend using an epinephrine concentration of 1:200,000 or 1:400,000 to provide optimal initial hemostasis while minimizing potential side effects.