Management of Obstructive Sleep Apnea in Patients with Huntington's Disease

Diagnostic Approach

A comprehensive sleep history should evaluate for common OSA symptoms including snoring, witnessed apneas, gasping/choking at night, excessive daytime sleepiness, nonrefreshing sleep, sleep fragmentation, nocturia, morning headaches, decreased concentration, memory loss, and irritability, as recommended by the American Academy of Sleep Medicine 1, 2
Physical examination should focus on features suggesting OSA: increased neck circumference, BMI >30 kg/m², Modified Mallampati score of 3-4, retrognathia, lateral peritonsillar narrowing, macroglossia, tonsillar hypertrophy, and nasal abnormalities, according to the American Academy of Sleep Medicine 1
Objective testing is required to establish OSA diagnosis and severity in HD patients, with in-laboratory polysomnography (PSG) being the standard diagnostic method, as stated by the American Academy of Sleep Medicine 1, 2
PSG should measure electroencephalogram, electrooculogram, chin electromyogram, airflow, oxygen saturation, respiratory effort, and electrocardiogram, as recommended by the American Academy of Sleep Medicine 2

To ensure optimal benefit, patients should undergo PSG with CPAP titration to determine appropriate pressure settings, according to the American Academy of Sleep Medicine 2
Preoperative CPAP should be continued and used during sedation when appropriate, and general anesthesia with a secure airway is preferable to deep sedation without a secure airway, as recommended by the American Society of Anesthesiologists 3
Full reversal of neuromuscular block should be verified before extubation, and patients should be extubated while awake unless medically contraindicated, as stated by the American Society of Anesthesiologists 3
For patients who cannot tolerate CPAP, consider oral appliances if the patient has adequate healthy teeth, no significant temporomandibular joint disorder, and adequate manual dexterity, as recommended by the American Academy of Sleep Medicine 4

Regular follow-up PSG is indicated to assess treatment efficacy, especially if symptoms return despite initial good response to treatment, as recommended by the American Academy of Sleep Medicine 2

Don't rely on portable monitoring devices for diagnosis in HD patients due to their neuromuscular disease, as stated by the American Academy of Sleep Medicine 1
Don't overlook the need for regular reassessment as both HD and OSA can progress over time, according to the American Academy of Sleep Medicine 2

Medications that worsen obstructive sleep apnea or promote weight gain should be avoided, as they can aggravate airway obstruction and sympathetic overactivity in affected individuals. 5

“Z‑drugs” and sodium oxybate should be used with caution in OSA patients because existing evidence shows conflicting impacts on respiratory stability during sleep. 5