Nerve blocks and Neurectomies in Fore Limb

NERVE BLOCK AND NEURECTOMIES IN FORE LIMB

Illustration- I

Illustration- II

Median nerve block and neurectomy

  • The median nerve passes below the elbow beneath the pronator teres. It then runs down along the forearm between the radius and flexor carpi radialis muscle. Median nerve supplies pronator teres, flexor carpi radialis, superficial digital flexor, humeral and radial heads of deep digital flexor muscles.
  • Site: Below the medial tuberosity of the radius at the groove between caudal border of the radius and flexor carpi radialis muscle.

Ulnar nerve block and neurectomy

  • At the lower one third of the forearm this nerve lies relatively superficial between the flexor carpi ulnaris and ulnaris lateralis muscle. Ulnar nerve supplies the flexor carpi ulnaris, superficial digital flexor and ulnar head of deep digital flexor.
  • Site: A few inches above accessory carpal.

Volar nerve block and neurectomy

  • The volar or metacarpal nerves are terminal branches of the median nerve. The lateral volar nerve merges with the deep branch of the ulnar nerve. The medial volar nerve is accompanied by the medial volar metarcarpal artery, the lateral volar nerve is accompanied by the lateral volar metacarpal artery. Each volar metacarpal nerve continues as respective volar abaxial digital nerve where as volar common digital nerve is formed by union of middle branches of median nerve.
  • Site:
    • High volar block: 5 to 7 cm above the fetlock in the depression between suspensory ligament and deep flexor tendon both on medial and lateral aspects.
    • Low volar block: Midway between the fetlock and coronet in between deep digital flexor and superficial digital flexor both on medial and lateral aspects.
Last modified: Thursday, 3 May 2012, 7:02 AM