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Percutaneous A1 pulley release: a cadaveric study

G I Bain1, J Turnbull, M N Charles

  • 1Department of Orthopaedic Surgery, University of Western Ontario, London, Canada.

The Journal of Hand Surgery
|September 1, 1995
PubMed
Summary
This summary is machine-generated.

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Percutaneous A1 pulley release is a viable treatment for trigger digits in the index, long, and ring fingers. However, caution is advised for thumb trigger digit release due to potential digital nerve injury.

Area of Science:

  • Orthopedics
  • Hand Surgery
  • Anatomy

Background:

  • Trigger digits, or stenosing tenosynovitis, affect the A1 pulley, causing painful finger locking.
  • Percutaneous release is a minimally invasive alternative to open surgery for trigger digits.

Purpose of the Study:

  • To evaluate the safety and efficacy of percutaneous A1 pulley release using a 14-gauge angiocath needle in cadaveric hands.
  • To assess the adequacy of A1 pulley release and identify potential injuries to adjacent structures.

Main Methods:

  • Seventeen fresh-frozen cadaveric hands underwent percutaneous A1 pulley release with a 14-gauge angiocath needle.
  • Cadaveric hands were dissected post-procedure to evaluate A1 pulley release completeness and adjacent structure integrity (tendons, nerves).

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Main Results:

  • Complete A1 pulley release was achieved in 68% of fingers (45/66) and 59% of thumbs (10/17).
  • Two flexor tendon injuries were noted, occurring along the line of fibers; no digital nerve injuries were observed.
  • Proximity to digital nerves was noted in thumbs (7/17) and little fingers (2/17), indicating potential risks.

Conclusions:

  • Percutaneous A1 pulley release is safe and effective for index, long, and ring fingers.
  • The thumb presents a higher risk for digital nerve injury during percutaneous release.
  • Abducting the little finger may reduce risks associated with percutaneous release in that digit.