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TWITCHER: a device to stimulate thumb twitch response to ulnar nerve stimulation
S Lampotang1, M L Good, P M Heijnen
1Department of Anesthesiology, University of Florida College of Medicine, University of Florida Brain Institute, Gainesville 32610-0254, USA. sem@anest4.anest.ufl.edu
Objective:
To design and fabricate a device to simulate evoked thumb adduction in response to ulnar nerve stimulation.
Methods:
We implemented a computer-controlled, motorized thumb (TWITCHER) that responds to ulnar nerve stimulation by an unmodified peripheral nerve stimulator. Clinically realistic response patterns are generated for both depolarizing and non-depolarizing muscle relaxants and three modes of stimulation (single twitch, train-of-four, tetanus).
Results:
The device has been used in a full-scale patient simulator for the last six years.
Discussion:
TWITCHER has been well received by participants in simulation exercises including the use of neuromuscular blocking drugs.
