Accuracy and Precision of Train-of-Four Ratios Obtained With Acceleromyography and Electromyography in Restricted-Movement Settings in the Absence of Neuromuscular Blocking Drugs

Accuracy and precision

Accuracy and precision of train-of-four ratios measured simultaneously by two quantitative neuromuscular monitors every minute among 40 patients undergoing surgery of at least 30 min duration (roughly 1200 measurements) in which the arms are tucked and in the absence of neuromuscular blocking agents. In the absence of neuromusuclar blocking agents, the expected train-of-four ratio is 1.0. Accuracy of each monitor will be assessed by how close measuremetns are to 1.0 while precision will be assessed by the variability of the measured responses in all patients undergoing procedure.

Time frame: 120 minutes