Nerve Blocks in Horses

Question 1

What is the block location for a palmar digital block?

Answer 1

Around medial and palmar digital nerves between proximal sesamoid bones and foot cartilages

Question 2

What areas are desensitized by a palmar digital block?

Answer 2

50-70% of palmar/plantar aspect of the foot

Question 3

What joint is blocked with a palmar digital nerve block?

Answer 3

Coffin joint (distal interphalangeal) - except the proximodorsal region

Question 4

What is the lowest nerve block you can do in a horse?

Answer 4

Palmar digital

Question 5

What is the next block up from a palmar digital block in a horse?

Answer 5

Abaxial

Question 6

What is the block location for an abaxial sesamoid block?

Answer 6

Around medial and lateral palmar digital nerves @ medial/lateral aspect of proximal sesamoid bones

Question 7

What areas are desensitized by an abaxial sesamoid block?

Answer 7

Skin @ distal pastern, foot

Question 8

What joints are blocked with an abaxial sesamoid block?

Answer 8

Pastern (proximal interphalangeal) and coffin joints

Question 9

Which block is proximal to the abaxial sesamoid block?

Answer 9

Low 4-point

Question 10

What is the block location for a low 4-point?

Answer 10

Dorsolateral/medial to DFT @ distal metacarpal bone proximal to fetlock joint + distal to end of each splint bone

Question 11

Which nerves are blocked with a low 4-point?

Answer 11

Palmar nerves and palmar metacarpal nerves

Question 12

What areas are desensitized by a low 4-point block?

Answer 12

Entire fetlock joint + everything distal to the joint

Question 13

What is the most proximal distal limb block used in a horse?

Answer 13

High 4-point (subcarpal)

Question 14

Which nerves are anesthetized with a high 4-point?

Answer 14

Palmar and palmar metacarpal nerves

Question 15

What is the block location of a high 4-point?

Answer 15

Between suspensory lig and DDF just distal to carpus + between suspensory lig and splint bones @ palmar cortex of cannon bone

Question 16

What areas are desensitized with a high 4-point block?

Answer 16

Metacarpal region, entire fetlock and digit

Question 17

If a horse blocks to a low 4-point, where is the lesion causing lameness?

Answer 17

Fetlock joint or below

Question 18

Which block blocks the palmar part of the food?

Answer 18

Palmar digital nerve block

Question 19

Which block desensitizes the foot, pastern, and fetlock joint?

Answer 19

Low 4 point block

Question 20

Which block desensitizes the leg distal to the carpus/tarsus (metacarpals and below)?

Answer 20

High 4 point block

Question 21

Which block is good to use if there is a problem at the pastern (prox interphalangeal) joint?

Answer 21

Abaxial block

Question 22

Which block desensitizes the deep branch of the lateral palmar nerve at the level of the carpometacarpal joint?

Answer 22

Suspensory lig block