Respiratory Surgery II Flashcards Preview

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Flashcards in Respiratory Surgery II Deck (14)
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1
Q

What nerve innervates the cricoarytenoideus dorsalis muscle?

A
  • Left recurrent pharyngeal nerve
2
Q

Where is the soft palate in the horse?

A

Tucked under the epiglottis unless the horse is swallowing –> moves dorsal so that ingesta can enter the esophagus

3
Q

What is recurrent laryngeal hemiplegia/ “roarer”?

A
  • Uni/ bi lateral paralysis of the cricoarytenoid muscle

- Left side most common

4
Q

Where is roaring most commonly seen?

A
  • 1-10 years old
  • large breed horses
  • Thoroughbred yearling
5
Q

What is the etiology of roaring?

A
Perivascular injection
Guttaral pouch mycosis
Trauma
Strangles
Organophosphate toxicity
Plant poisoning
Lead Toxicity
CNS disease
Liver disease
6
Q

How can you diagnose roaring?

A

History –> noise and exercise intolerance
Palpation
Endoscopy –> slap test, videoendoscopy during treadmill exercise

7
Q

What is the slap test?

A

A way to evaluate the recurrent laryngeal nerve and portion of spinal cord

  1. Slap withers during endoscopy
  2. Observe adduction of contralateral arytenoid cartilage

What occurs is spinal cervical cord –> medulla decussation –> recurrent laryngeal nerve

** If nerve is damaged, you won’t see a response**

8
Q

What is a grade 1 laryngeal paralysis?

A

Normal full abduction of left and right

9
Q

What is a grade 2 laryngeal paralysis?

A

Asynchronous abduction but full abduction can be achieved

10
Q

What is a grade 3 laryngeal paralysis?

A

Symmetry at rest some movement, abduction can be achieved

11
Q

What is a grade 4 laryngeal paralysis?

A

Asymmetry at rest and no movement

12
Q

What is the treatment for laryngeal paralysis?

A

Laryngoplasty (tieback)

- right lateral recumbency (because L side usually affected)

13
Q

Why is it important to tie a tight know when tying the cricoarytenoideus dorsalis muscle?

A

The tighter you tie the muscle, the more it opens the arytenoid cartilage

14
Q

What are some complications of tieback?

A

Seroma