Roof Of Tunnel Of Guyon

The ulnar canal or ulnar tunnel also known as guyon s canal or tunnel is a semi rigid longitudinal canal in the wrist that allows passage of the ulnar artery and ulnar nerve into the hand.

Roof of tunnel of guyon.

Creation of working space three millimeter skin incisions are made at the portal sites. Guyon s canal left hand from the palmar side yellow. The pisohamate ligament forms the roof of that canal. The ligament heals by forming scar tissue.

The ulnar nerve and its sensory and motor branch. Once in view this ligament is released using a scalpel or scissors. It is formed by the following structures. Floor is formed by the flexor retinaculum extending transversely across carpal bones and roof is formed by the pisohamate ligament ligament attaching pisiform to hook of hamate.

Mentous roof of the guyon canal. The hook of hamate bone. Care is taken to make sure that the ulnar nerve is out of the way and protected. The most radical treatment option is surgery to relieve tension in the volar carpal ligament which forms the roof of guyon s canal thereby reducing compression on the ulnar nerve.

The needle is then withdrawn halfway and normal saline solution is injected. Once the ligament is cut the pressure on the nerve is relieved. Jean casimir félix guyon. The volar portion roof of the canal is created by the volar carpal ligament also known as the palmar carpal ligament.

The skin is then sewn back together. The roof of the canal is made up of the superficial palmar carpal ligament while the deeper flexor retinaculum and hypothenar muscles comprise the floor. Guyon s canal is a unique location where ulnar nerve is vulnerable to compressive injury although the more common location of the ulnar nerve injury occurs at the elbow which is known as cubital tunnel syndrome. Between the pisiform and the hook of the hamate is a depression known as the tunnel of guyon.

Volar carpal ligament the roof. Figure 1 volar wrist anatomy of floor and roof of guyon canal. Guyon canal serves as a protection for the ulnar nerve and ulnar artery as they traverse from the distal wrist into the hand. The ligament that forms the roof of guyon s canal is cut to relieve the pressure on the ulnar nerve.

Because the tunnel of guyon encloses the ulnar. This ligament forms the roof over the top of guyon s canal. This hydrodissection creates a space just superficial to the ligamentous roof of the guyon ca nal 15 blanching of the overlying skin can be observed fig 2.