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Metacarpal Small Incision for Carpal Tunnel Syndrome
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Trigger Fingers After Open Carpal Tunnel Release.

Duffield Ashmead1, Haruko Okada1, Jonathan Macknin1

  • 1The Hand Center, Glastonbury, CT, USA.

Plastic Surgery (Oakville, Ont.)
|November 20, 2020
PubMed
Summary

Trigger finger (TF) can develop after carpal tunnel release (CTR) surgery. Trigger thumb is more common and occurs earlier than triggering in other digits post-surgery.

Keywords:
carpal tunnel releaseoccurrencesurgerytimingtrigger finger

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Area of Science:

  • Orthopedics
  • Hand Surgery
  • Musculoskeletal Disorders

Background:

  • Trigger finger (TF) and carpal tunnel syndrome (CTS) are prevalent conditions.
  • The relationship between TF and CTS, particularly post-carpal tunnel release (CTR), remains unclear.
  • Existing research offers conflicting conclusions regarding a causal link between CTR and TF development.

Purpose of the Study:

  • To determine the prevalence and timing of new-onset trigger finger in the same hand following open carpal tunnel release.
  • To investigate potential risk factors associated with trigger finger development after carpal tunnel surgery.

Main Methods:

  • Retrospective review of 497 patients who underwent open carpal tunnel release by a single surgeon.
  • Detailed analysis of 229 patient charts, including demographics, BMI, and comorbidities.
  • Tracking the incidence, affected digit, and time to onset of trigger finger post-operatively.

Main Results:

  • 13.5% of patients developed trigger finger after open carpal tunnel release.
  • The thumb was the most frequently affected digit (42.22%), followed by the ring and middle fingers.
  • Trigger thumb onset was significantly earlier (mean 3.5 months) compared to other digits (mean 7.5 months), P = .022.
  • No specific risk factors were identified for trigger finger development post-surgery.

Conclusions:

  • Open carpal tunnel release is associated with a notable incidence of new-onset trigger finger.
  • Trigger thumb appears to be more common and develops earlier than trigger digits in other fingers after carpal tunnel release.
  • Further research is warranted to elucidate the underlying mechanisms and inform potential preventative or therapeutic strategies, including patient education.