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Journal of Hand Surgery (British and European Volume)
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Articles

Touch Allodynia Following Endoscopic (Single Portal) or Open Decompression for Carpal Tunnel Syndrome

B. POVLSEN
I. TEGNELL
M. REVELL
L. ADOLFSSON

From the Department of Plastic Surgery, Hand Surgery and Burns, University of Linköping, Linköping, Sweden and the Department of Orthopaedic Surgery, St Thomas' Hospital, London, UK

Correspondence: B. Povlsen MD, Department of Orthopaedic Surgery, St Thomas' Hospital, Lambeth Palace Road, London SE1 7EH, UK.

We investigated if single-portal endoscopic carpal tunnel decompression equipment (Agee®, 3M, USA) would cause increased carpal tunnel pressure during the release and if endoscopic release would reduce postoperative touch allodynia. Measurements on cadavers of the pressure produced during endoscopic release showed similar pressures to those produced during maximal range of motion. One hundred patients underwent either open or endoscopic decompressions. Twenty normal individuals served as controls. At 1 month after surgery both groups had significant allodynia compared with the controls, but at 3 months the endoscopic group had returned to normal though the open group was still significantly abnormal. The reported endoscopic release may therefore be of particular advantage to patients who would seriously be disadvantaged if postoperative touch allodynia should develop. The Agee® endoscope is unlikely to cause disturbance of the nerve function due to increased carpal pressure during the release.

Journal of Hand Surgery (British and European Volume), Vol. 22, No. 3, 325-327 (1997)
DOI: 10.1016/S0266-7681(97)80395-6
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