Train-of-Four Fade and Edrophonium Antagonism of Neuromuscular Block by Succinylcholine in Man
- 1 September 1976
- journal article
- clinical trial
- Published by Wolters Kluwer Health in Anesthesia & Analgesia
- Vol. 55 (5) , 663???667-7
- https://doi.org/10.1213/00000539-197609000-00009
Abstract
Thumb twitch in response to train-of-four stimulation (2 Hz for 2 sec) of the ulnar nerve was measured in 36 patients anesthetized with halothane and N2O and paralyzed with succinylcholine chloride (SCC). Train-of-four fade was detected whenever a block was produced. The train-of-four ratio decreased with continued exposure to SCC. Edrophonium effect was predictable by the train-of-four ratio in a semiquantitative manner, a high ratio predicting block enhancement and a low ratio, antagonism. When calculated at 30 to 50 percent recovery (from complete black), a train-of-four ratio of 0.4 or less reliably predicts antagonism. The magnitude of antagonism is also predictable in a semiquantitative manner, although complete antagonism cannot be ascertained. The lower the ratio, the more effective the antagonism becomes. Train-of-four fade, therefore, appears to be a consistent and sensitive quantitative sign of phase II neuromuscular block by SCC in man.Keywords
This publication has 0 references indexed in Scilit: