Laryngeal Paralysis and BAOS Flashcards
what are the functions of the larynx?
regulate airflow, protect trachea from aspiration, and control phonation
what muscles are responsible for laryngeal function?
the intrinsic muscles of the larynx
T/F: the cranial laryngeal nerve is the terminal segment of the recurrent laryngeal n. and innervates all the intrinsic laryngeal muscles except the cricothyroid muscle
FALSE, caudal laryngeal nerve
what nerve innervates the cricothyroid muscle?
cranial laryngeal nerve
T/F: contraction of the cricoarytenoideus dorsalis muscle results in adduction of the arytenoid cartilages
FALSE, abduction
what are the common causes of acquired laryngeal paralysis?
polyneuropathy (MC), polymyopathy, trauma, mass, and idiopathic
what is the most common breed predisposed to early-onset laryngeal paralysis-polyneuropathy?
young rottweilers
what breed is predisposed to geriatric-onset laryngeal paralysis-polyneuropathy?
labs
what clinical signs would you see in a patient with laryngeal paralysis?
noisy inspiration, exercise intolerance, voice change, coughing or “gagging”
what neuro deficits can you see in a patient with LP due to polyneuropathy?
pelvic limb and esophageal dysfunction
what is stridor localized to in a patient with laryngeal paralysis?
larynx or extrathoracic trachea
why would you include a thyroid test in a patient with LP?
hypothyroidism is common in dogs with LP
what test will give you the definitive diagnosis of laryngeal paralysis?
laryngeal exam
what is the surgical treatment for laryngeal paralysis?
unilateral arytenoid lateralization
how would you treat respiratory distress due to LP or BAOS?
supplemental O2, corticosteroid (dex), sedation (ace), minimize handling/stress, cooling, severe > intubate, mechanical ventilation, surgery
