Equine Respiratory: Pt 2

Question 1

Which intrinsic laryngeal muscle provides arytenoid abduction by drawing the dorsomedial margins of the arytenoid cartilages together?

a. the cricoarytenoideus lateralis
b. the arytenoideus transversus
c. the thyroarytenoideus
d. the cricoarytenoideus dorsalis

Answer 1

B

Question 2

Which intrinsic laryngeal muscle is not innervated by the recurrent laryngeal branch of the vagus nerve?

a. the cricoarytenoideus dorsalis
b. the arytenoideus transversus
c. the cricothyroideus
d. the thyroarytenoideus

Answer 2

C

Question 3

A remnant of the thyroglossal duct is thought to cause

a. dorsal epiglottic abscessation
b. subepiglottic granulomas
c. epiglottitis
d. subepiglottic cysts

Answer 3

D

Question 4

Alone, which recommended treatment for RLN does not improve upper airway noise or return the upper respiratory airflow mechanics to baseline values?

a. laryngoplasty
b. bilateral ventriculocordectomy
c. unilateral laser vocal cordectomy
d. none of the above

Answer 4

C

Question 5

Laryngoplasty failure can be corrected by

a. partial arytenoidectomy
b. ventriculectomy
c. bilateral ventriculocordectomy
d. unilateral laser vocal cordectomy

Answer 5

A

Question 6

What is the approximate success rate of partial arytenoidectomy in treating arytenoid chondritis in a racing TB?

a. 20%-30%
b. 40%-50%
c. 60%-80%
d. 85%-95%

Answer 6

C

Question 7

Which upper airway disturbance is thought to be caused by a developmental abnormality of the fourth branchial arch?

a. a subepiglottic cyst
b. axial deviation of the aryepiglottic folds
c. epiglottic retroversion
d. rostral displacement of the palatopharyngeal arch

Answer 7

D

Question 8

Which nerve/muscle combination is used when performing a neuromuscular-pedicle graft to treat RLN?

a. hypoglossal nerve/hyoepiglotticus muscle
b. first cervical nerve/omohyoideus muscle
c. external branch of the cranial laryngeal nerve/cricothyroideus muscle
d. external branch of the cranial laryngeal nerve/thyrohyoideus muscle

Answer 8

B

Question 9

Which of the following is not a complication of surgical correction of the epiglottic entrapment?

a. reentrapment
b. dorsal displacement of the soft palate
c. laceration of the epiglottis
d. epiglottic retroversion

Answer 9

D

Question 10

Which of the following disorders results in distortion of the corniculate process of the arytenoid cartilage, causing decreased arytenoid cartilage abduction, axial displacement of the arytenoid cartilage, and rostral displacement of the palatopharyngeal arch?

a. axial deviation of the aryepiglottic folds
b. rostral displacement of the palatopharyngeal arch
c. arytenoid chondritis
d. dorsal epiglottic abscessation

Answer 10

C