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This Concept Map, created with IHMC CmapTools, has information related to: Abaxial sesamoid nerve block, Advantages The ASNB blocks conditions related to Toe of foot (MO), Abaxial sesamoid nerve block (MO) Technique 1. The site of arthrocentesis is aspectically prepared (refer to Skin preparation)., Advantages The ASNB blocks conditions related to Coffin joint (MO), Disadvantages Using a small volume of local anaesthetic solution and directing the needle distally, rather than proximally, may also decrease the likelihood of partially anaesthetising the MC\MT-P joint, Disadvantages If the nerve is blocked at the base of the proximal sesamoidean bone, the likelihood of partially desensitizing the metacarpo-metatarsophalangeal (MC\MT-P) is decreased., Abaxial sesamoid nerve block (MO) Advantages, Abaxial sesamoid nerve block (MO) Areas desensitized - The foot, - Middle phalanx, - Proximal interphalangeal joint, - Distopalmar aspects of the proximal phalanx, - Distal portion of the superficial and deep flexor tendons, - Distal sesamoidean ligaments, - Digital annular ligament, * The palmar portion of the metacarpophalangeal joint is sometimes desensitized., 3. The palmar digital nerves are anesthetized at this level with the needle directed dorsally followed by the administration of the anaesthetic agent. Equipment 25ga 5\8 inch needle Hypodermic syringe, 3. The palmar digital nerves are anesthetized at this level with the needle directed dorsally followed by the administration of the anaesthetic agent. Volume of anaesthetic agent 2-2.5mls, Abaxial sesamoid nerve block (MO) Technique Successful nerve block (MO), Abaxial sesamoid nerve block (MO) Disadvantages, Advantages The ASNB blocks conditions related to Pastern joint (MO), Advantages The ASNB blocks conditions related to Pastern area (MO), Abaxial sesamoid nerve block (MO) Requires prerequisite knowledge Anatomy