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Abaxial (Basisesamoid) Nerve Block Minimize

Prepare skin as discussed previously

  1.  Elevate foot
  2.  Palpate neurovascular bundle as it courses over the abaxial surfaces of the proximal sesamoid bones.
  3.  Insert needle at basisesamoid level on axial side of n-v bundle. (25gx5/8") Point needle slightly abaxial and distally. Do medial and lateral nerves.
  4. Attach needle to syringe. With one hand support the hub of the needle and with the other hand check for blood and then inject 2-3mL mepivicaine per site.
  5. Wait 5-10 minutes, check for skin sensation, and reassess lameness.


Structures Anaesthetized

  • All of structures anaesthetized by PD n.block
  • Three phalanges
  • Coffin and Pastern joints
  • Entire corium
  • Entire sole
  • Dorsal branches of suspensory ligament
  • Digital extensor tendon
  • Distal sesamoidean ligaments
  • +/- Proximal sesamoid bones
  • +/- Palmar fetlock joint

Common Conditions Diagnosed

  • Laminitis
  • Ring bone
  • Soft tissue injuries of pastern
  • Occasionally block fetlock or sesamoid problems
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