alexa Lateral plantar nerve neuropraxia after FHL tendoscopy: case report and anatomic evaluation.
Physicaltherapy & Rehabilitation

Physicaltherapy & Rehabilitation

International Journal of Physical Medicine & Rehabilitation

Author(s): Lui TH

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Abstract BACKGROUND: FHL tendoscopy has been described as minimally invasive method used to create some pathologies or facilitate some surgeries. As we have encountered lateral plantar nerve neurapraxia, we investigate the cause of lateral nerve injury during Zone 2 flexor digitorum longus (FHL) tendoscopy with a cadaveric model. MATERIAL AND METHOD: Eight feet of 4 embalmed cadavers were used for this study. Posterior ankle endoscopy (Zone 1 FHL tendoscopy) was performed with posteromedial and posterolateral portals. A 4.0-mm metal rod was inserted into the Zone 2 tendon health through the posteromedial portal. The distance between the posteromedial portal and the posterior tibial nerve was measured with the ankle in neutral position. Then, the shortest distance between the posterior tibial nerve and the rod was measured with the ankle in three positions: 20 degrees plan-tarflexion, neutral, and the 20 degrees dorsiflexion. RESULT: The average distance between the posterior tibial nerve and the posteromedial portal was 9.3 mm. The average shortest distance between the posterior tibial nerve and the metal rod was 5 mm with the ankle in 20 degrees dorsiflexion. CONCLUSION: Ankle dorsiflexion brings the posterior tibial nerve in contact with the arthroscope during Zone 2 tendoscopy. CLINICAL RELEVANCE: In order to avoid potential nerve injury during Zone 2 FHL tendoscopy, ankle dorsiflexion should be avoided. This article was published in Foot Ankle Int and referenced in International Journal of Physical Medicine & Rehabilitation

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