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Understanding the recurrent pulled elbow.

Ugur Bezirgan1, Göksel Vatansever2, Yener Yoğun1

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Summary

Joint hyperlaxity, not bone anatomy, is linked to recurrent nursemaid elbow dislocations in children. This finding helps understand the causes of repeated radial head subluxation.

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Area of Science:

  • Pediatric Orthopedics
  • Radiology
  • Clinical Epidemiology

Background:

  • Nursemaid elbow, a common pediatric injury, involves radial head subluxation.
  • The exact causes of recurrent dislocations and the influence of patient-specific factors remain unclear.

Purpose of the Study:

  • To investigate the epidemiology of recurrent nursemaid elbow dislocations.
  • To assess the impact of joint hyperlaxity and bone anatomy on recurrent injuries.

Main Methods:

  • Retrospective study of 329 pediatric patients diagnosed with nursemaid elbow.
  • Radiographic measurement of the radius head-neck ratio.
  • Evaluation of joint hyperlaxity using the Beighton score in patients with recurrent dislocations.

Main Results:

  • A significant association was found between Beighton scores and the number of dislocations in cases of multiple dislocations (P=0.002).
  • No significant relationship was identified between the number of dislocations and the lateral radius head/neck ratio (P=0.061).

Conclusions:

  • Joint hyperlaxity syndrome is a key factor in the etiology of recurrent nursemaid elbow dislocations.
  • Bone anatomy, specifically the radius head-neck ratio, does not appear to be a significant predictor of recurrent dislocations.