Twitcher: A Device to Simulate Thumb Twitch Response to Ulnar Nerve Stimulation

Abstract

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.

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REFERENCES

  1. 1.

    Lampotang S, Good ML, van Meurs WL, Carovano RG, Azukas J, Rueger EM, Gravenstein JS. The University of Florida/Loral human patient simulator, abstracted. J Anesthesia 1995; 9: SS1-5

    Google Scholar 

  2. 2.

    van Meurs WL, Good ML, Lampotang S. Functional anatomy of full-scale patient simulators. J Clin Monit, 1997; 13: 317-324

    Google Scholar 

  3. 3.

    Gaba DM, Deanda A. A comprehensive anesthesia simulation environment: re-creating the operating room for research and training. Anesthesiology 1988; 69: 387-394

    Google Scholar 

  4. 4.

    Atwater RJ, Good ML. A low-cost laboratory data acquisition and control system, abstracted. Int J Clin Monit Comput 1990; 7(1): 2-3

    Google Scholar 

  5. 5.

    Lampotang S, Good ML, Gravenstein JS, Carovano RG. Method and apparatus for simulating neuromuscular stimulation during medical surgery. US Patent 5,391,081, issued Feb 21, 1995

  6. 6.

    Lampotang S, Good ML, Heijnen PMAM. Low battery characteristic of the Professional Instruments NS-2CA nerve stimulator. J Clin Monit 1994; 10: 276

    Google Scholar 

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Lampotang, S., Good, M.L., Heijnen, P.M.A.M. et al. Twitcher: A Device to Simulate Thumb Twitch Response to Ulnar Nerve Stimulation. J Clin Monit Comput 14, 135–140 (1998). https://doi.org/10.1023/A:1007492922193

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  • simulation
  • peripheral nerve stimulation
  • neuromuscular blockade
  • thumb adduction