Journal of Clinical Monitoring and Computing

, Volume 14, Issue 2, pp 135–140 | Cite as

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

  • Samsun Lampotang
  • Michael L. Good
  • Pascal M. A. M. Heijnen
  • Joachim S. Gravenstein


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.

simulation peripheral nerve stimulation neuromuscular blockade thumb adduction 


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Copyright information

© Kluwer Academic Publishers 1998

Authors and Affiliations

  • Samsun Lampotang
    • 1
    • 2
    • 3
    • 4
  • Michael L. Good
    • 1
    • 2
    • 5
  • Pascal M. A. M. Heijnen
    • 6
  • Joachim S. Gravenstein
    • 1
  1. 1.Department of AnesthesiologyUniversity of Florida College of MedicineFloridaU.S.A.
  2. 2.University of Florida Brain InstituteFloridaU.S.A.
  3. 3.Department of Mechanical EngineeringUniversity of Florida College of EngineeringFloridaU.S.A.
  4. 4.Department of Electrical and Computer EngineeringUniversity of Florida College of EngineeringFloridaU.S.A.
  5. 5.Veterans Affairs Medical CenterGainesvilleU.S.A.
  6. 6.PTT TelecomThe Netherlands

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