Neurectomy Flashcards Preview

Large Animal Surgery > Neurectomy > Flashcards

Flashcards in Neurectomy Deck (23):
1

What is sweeny?

A layterm for paralysis of the suprascapular nerve which innervates the supra- and infraspinatus muscles.

2

Describe the appearance of sweeny.

Supra- and infraspinatus muscles atrophy, revealing the spine of the scapula.

3

How soon after nerve damage do you see muscle atrophy associated with Sweeny?

7-14 days

4

What is the basic idea behind treating sweeny?

Decompress the nerve

5

How is decompression of the suprascapular nerve achieved?

Remove a small bit of the edge of the scapula to allow more space for the nerve.

6

What 3 things is a palmar digital neurectomy used to relieve pain from?

Navicular dz
Fx of navicular bone
Selected fractures of the distal phalanx

7

What animals can you not perform a palmar digital neurectomy on?

Any animal that is a professional athlete, considered a form of doping.

8

What is navicular dz?

Chronic, progressive dz affecting the navicular bone, bursa and sometimes the DDF.

9

What are 3 signs you might see with navicular dz?

Short stride
Toe bruising (toe of hoof capsule will be more worn down)
Response to hoof testers

10

How might hoof trimming help navicular dz?

Helps balance the foot.

11

Why can we not give phenylbutazone to horses in the UK?

Because they are food animals and if it's in the meat, it can cause aplastic anemia in people.

12

What are two things to look for when surgically approaching a nerve?

The nerve will pucker
Surface will reveal striation

13

Briefly describe the guillotine technique for a palmar digital neurectomy.

Nerve is cut distally, stretched and then while still stretched, it is cut proximally.

14

How many days do you treat with antibiotics post neurectomy?

3 days

15

What are 4 complications of a palmar digital neurectomy?

Painful neuroma
Reinnervation
Persistence of sensation
Loss of hoof wall

16

Post neurectomy, what must you emphasize to the owner about checking their horse?

REALLY need to check the feet every day, if they step on a nail or anything, the horse won't feel it and this can be catastrophic.

17

How soon might a neurectomy reinnervate?

As soon as 1 year to as long as 3 years.

18

What is a stringhalt?

Hyperflexion of the hock and stifle joints.

19

What is the surgical treatment for stringhalt?

Lateral digital extensor tenotomy.

20

What is the purpose of the peroneus tertius muscle?

Part of the reciprocal apparatus (simultaneous hock and stifle flexion)

21

What can you see in a horse with a ruptured peroneus tertius, that you would not see in a normal horse?

Stifle can flex without hock flexion.

22

What is the treatment of a ruptured peroneus tertius?

Stall rest for 2 months.

23

What is the prognosis of a horse with a ruptured peroneus tertius?

Guarded