Knowledge Base Carpal Tunnel Decompression How long does the Carpal Tunnel Decompression procedure take? On average the carpal tunnel procedure takes about 20 minutes, but you will be at the surgery for around an hour. Last Updated: 7 months ago in Carpal Tunnel Decompression Did this article answer your question? Related Articles How soon will I be able to return to work after Carpal Tunnel Decompression? Will Carpal Tunnel Decompression hurt? What happens during Carpal Tunnel Decompression surgery? What is Carpal Tunnel Syndrome?