Comparison of the ToFscan and TetraGraph During Recovery of Neuromuscular Function in the Post Anesthesia Care Unit

TetraGraph device is a neuromuscular transmission monitor capable of estimating the depth of neuromuscular block in anesthetized patients who received neuromuscular blocking agents. TetraGraph uses EMG to measure the muscle action potentials that are generated in response to percutaneous electrical neurostimulation. Following simultaneous ulnar nerve stimulation on each arm, the response of the adductor pollicis will be measured.

ToFscan is a nerve stimulator module used for the measurement of neuromuscular transmission via accelerometry. ToFscan was developed by Drager Technologies, Canada, and it uses a three-dimensional piezoelectric sensor that attaches to the thumb via a hand adapter to measure acceleration in multiple planes (Murphy et al, 2018). Following simultaneous ulnar nerve stimulation on each arm, the response of the adductor pollicis will be measured.