Related Experiment Videos
Median nerve excursion during endoscopic carpal tunnel release
Serdar Tuzuner1, Sibel Ozkaynak, Cem Acikbas
1Department of Orthopedics and Traumatology, Akdeniz University School of Medicine, Antalya, Turkey. tuzuner@akdeniz.edu.tr
Neurosurgery
|April 29, 2004
Summary
Endoscopic carpal tunnel release (ECTR) effectively resolves symptoms by improving median nerve gliding within the carpal tunnel. This study found ECTR did not alter median nerve excursion with wrist movement, suggesting improved nerve mobility post-surgery.
Area of Science:
- Orthopedics
- Neurosurgery
- Biomechanics
Background:
- Carpal tunnel syndrome (CTS) is often linked to restricted median nerve movement.
- Understanding median nerve excursion is crucial for CTS pathogenetic evaluation.
Purpose of the Study:
- To quantify median nerve excursion in the carpal tunnel.
- To assess changes in nerve excursion before and after endoscopic carpal tunnel release (ECTR).
- To correlate nerve excursion with wrist position.
Main Methods:
- A prospective clinical study involving 28 hands from 22 patients undergoing ECTR.
- Radiographic measurement of markers embedded in the median nerve at three wrist positions.
- Measurements were taken before and after single-portal ECTR using Menon's technique.
Main Results:
- 93% of patients reported symptom resolution post-ECTR.
- Median nerve excursion was linear and influenced by wrist position, averaging 28.8 mm from full dorsiflexion to palmar flexion before ECTR.
- No statistically significant difference in median nerve excursion was observed after ECTR compared to pre-operative measurements.
Conclusions:
- Single-portal ECTR does not appear to significantly alter median nerve excursion across the studied wrist positions.
- In vivo median nerve gliding was found to be twice that observed in in vitro studies.
- The findings suggest that while ECTR relieves symptoms, it may not directly change the biomechanics of median nerve excursion within the carpal tunnel.