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Related Experiment Videos

Scaphoid shift in the uninjured wrist

K J Easterling1, S W Wolfe

  • 1Department of Orthopaedics & Rehabilitation, Yale University School of Medicine, New Haven, CT 06510.

The Journal of Hand Surgery
|July 1, 1994
PubMed
Summary

A positive scaphoid shift occurs in 32% of people without wrist injuries. This finding, often painless, is linked to greater generalized ligamentous laxity, not carpal malalignment.

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Area of Science:

  • Orthopedics
  • Anatomy
  • Biomechanics

Background:

  • The scaphoid shift maneuver is a clinical test used to assess wrist instability.
  • Understanding the prevalence of a positive scaphoid shift in an uninjured population is crucial for accurate diagnosis.

Purpose of the Study:

  • To determine the prevalence of a positive scaphoid shift in individuals without a history of wrist trauma or instability.
  • To investigate the correlation between a positive scaphoid shift and generalized ligamentous laxity.
  • To assess the relationship between a positive scaphoid shift and radiographic carpal alignment.

Main Methods:

  • Physical and radiographic evaluation of 100 patients presenting with non-traumatic wrist symptoms.
  • Bilateral performance of the scaphoid shift maneuver and assessment of generalized ligamentous laxity.
  • Radiographic analysis including measurement of radiolunate and scapholunate angles.

Main Results:

  • A positive scaphoid shift was observed in 32% of the study population, and it was consistently painless.
  • A positive scaphoid shift was significantly associated with increased generalized ligamentous laxity.
  • No correlation was found between a positive scaphoid shift and radiographic carpal malalignment.

Conclusions:

  • The scaphoid shift maneuver can be positive in a significant portion of the asymptomatic population.
  • Generalized ligamentous laxity is a key factor associated with a positive scaphoid shift.
  • A positive scaphoid shift should be interpreted in the context of overall ligamentous laxity and not solely as an indicator of carpal malalignment.

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