Hematoma risk after needle electromyography

Andrea Boon, Jon T. Gertken, James Watson, Ruple S. Laughlin, Jeffrey A. Strommen, Michelle M Mauermann, Eric James Sorenson

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

Introduction: Although needle electromyography (EMG) appears to be a relatively safe procedure based primarily on clinical experience, no evidence-based guidelines exist for EMG procedures in patients taking anticoagulant or antiplatelet medications. We sought to determine whether there is an increased risk of hematoma formation after EMG of potentially high-risk muscles in patients taking anticoagulant or antiplatelet agents. Methods: After undergoing routine EMG, if any of seven predetermined high-risk muscles were tested, study subjects then underwent ultrasound to evaluate for hematoma formation. Results: Patients were divided into three groups based on medication (warfarin, aspirin/clopidogrel, no blood-thinning medication), with at least 100 muscles examined per group. Two small, subclinical hematomas were seen on ultrasound; there was no difference in hematoma risk between groups (P = 0.43). Conclusions: Our findings suggest that hematoma formation from standard needle EMG is rare even in high-risk muscles, which have been avoided historically in anticoagulated patients.

Original languageEnglish (US)
Pages (from-to)9-12
Number of pages4
JournalMuscle and Nerve
Volume45
Issue number1
DOIs
StatePublished - Jan 2012

Fingerprint

Electromyography
Hematoma
Needles
Muscles
clopidogrel
Anticoagulants
Platelet Aggregation Inhibitors
Warfarin
Aspirin
Guidelines

Keywords

  • Aspirin
  • Clopidogrel
  • Electromyography
  • Hematoma
  • Ultrasound
  • Warfarin

ASJC Scopus subject areas

  • Clinical Neurology
  • Cellular and Molecular Neuroscience
  • Physiology (medical)
  • Physiology

Cite this

Hematoma risk after needle electromyography. / Boon, Andrea; Gertken, Jon T.; Watson, James; Laughlin, Ruple S.; Strommen, Jeffrey A.; Mauermann, Michelle M; Sorenson, Eric James.

In: Muscle and Nerve, Vol. 45, No. 1, 01.2012, p. 9-12.

Research output: Contribution to journalArticle

Boon, Andrea ; Gertken, Jon T. ; Watson, James ; Laughlin, Ruple S. ; Strommen, Jeffrey A. ; Mauermann, Michelle M ; Sorenson, Eric James. / Hematoma risk after needle electromyography. In: Muscle and Nerve. 2012 ; Vol. 45, No. 1. pp. 9-12.
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