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A new test for superficialis flexor tendon function.
T Doğan1, O Celebiler, R Gürünlüoğlu
1Department of Plastic and Reconstructive Surgery, Marmara University School of Medicine, Istanbul, Turkey.
Annals of Plastic Surgery
|August 5, 2000
Summary
Diagnosing flexor digitorum superficialis tendon injuries is challenging. A new DIP extension test effectively identifies these injuries, especially in the index finger, by assessing distal interphalangeal joint hyperextension.
Area of Science:
- Orthopedic Surgery
- Hand Surgery
- Musculoskeletal Diagnostics
Background:
- Isolated flexor digitorum superficialis (FDS) tendon injuries present diagnostic challenges when the flexor digitorum profundus (FDP) tendon remains functional.
- Accurate diagnosis is crucial for appropriate treatment and patient outcomes in hand injuries.
Observation:
- A novel diagnostic method, the Distal Interphalangeal (DIP) extension test, has been developed for isolated FDS tendon injuries.
- The test involves flexing the proximal interphalangeal (PIP) joint in a precision pinch, requiring DIP joint hyperextension for normal function.
Findings:
- Inability to achieve DIP joint hyperextension during the test indicates an isolated FDS tendon injury.
- The DIP extension test demonstrated high diagnostic accuracy in a study of 15 isolated FDS injuries across 10 patients.
- Surgical exploration confirmed the diagnosis in all 9 patients who underwent the procedure.
Implications:
- The DIP extension test offers a simple, reliable clinical tool for diagnosing challenging isolated FDS tendon injuries.
- This diagnostic advancement can lead to earlier and more accurate treatment of superficialis tendon injuries.
- Improved diagnostic capabilities can enhance surgical planning and patient recovery in hand surgery.