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Related Experiment Videos

Electromyography: do the diagnostic ends justify the means?

M J Kothari1, D C Preston, G M Plotkin

  • 1Division of Neurology, Brigham and Women's Hospital, Boston, MA 02115, USA.

Archives of Physical Medicine and Rehabilitation
|October 1, 1995
PubMed
Summary
This summary is machine-generated.

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Electromyography with nerve conduction studies (EMG/NCS) often provide alternative diagnoses. Patients found the electrodiagnostic test less painful and anxiety-provoking than anticipated, with most willing to undergo it again.

Area of Science:

  • Neurology
  • Diagnostic Medicine

Background:

  • Physician reluctance to refer for electrodiagnostic studies (EMG/NCS) due to perceived pain and limited benefit.
  • Patient apprehension regarding the discomfort and utility of EMG/NCS.

Purpose of the Study:

  • To assess the diagnostic benefit of EMG/NCS for referring physicians.
  • To compare pre-study patient anxiety with actual pain experienced during EMG/NCS.

Main Methods:

  • Two patient surveys conducted on 126 and 100 consecutive referrals.
  • Evaluation of diagnostic discordance between referral and electrodiagnostic findings.
  • Assessment of patient anxiety and pain levels pre- and post-EMG/NCS.

Main Results:

  • Electrodiagnosis was discordant from the referring diagnosis in 39% of abnormal EMG/NCS cases.

Related Experiment Videos

  • Pretest anxiety was low in 59% of patients; 82% reported the test was less painful than expected.
  • Ninety-three percent of patients indicated willingness to repeat the procedure.

    • Conclusions:

    • EMG/NCS frequently suggest alternative diagnoses, improving diagnostic accuracy.
    • The actual pain from EMG/NCS is significantly less than patient expectations.
    • Patient-reported outcomes suggest EMG/NCS is a valuable and tolerable diagnostic tool.