Bonus Material-17_SD2_Collop_2025

Pdf Summary

This 2025 Pulmonary Medicine Board Review presentation by Dr. Nancy Collop covers key aspects of sleep disorders, focusing on central sleep apnea (CSA), obesity hypoventilation syndrome (OHS), circadian rhythm disorders, insomnia, hypersomnias, and movement disorders such as restless legs syndrome (RLS).<br /><br />Central Sleep Apnea (CSA) is diagnosed by specific apnea criteria and symptoms such as excessive sleepiness. CSA subtypes include Cheyne-Stokes breathing (frequent in heart failure), opioid-induced apnea, and primary forms. Management involves identifying underlying causes, optimizing medical therapy (especially in heart failure), and using treatments like CPAP, bilevel PAP, or phrenic nerve stimulation. Adaptive Servo Ventilation (ASV) is generally contraindicated in heart failure patients with reduced ejection fraction due to increased mortality risk.<br /><br />Obesity Hypoventilation Syndrome is defined by obesity (BMI≥30) with awake hypercapnia (pCO2 >45 mmHg), frequently linked with severe obstructive sleep apnea. OHS is associated with high morbidity, healthcare utilization, and mortality. Treatment includes positive airway pressure (PAP) therapy, often starting with CPAP and escalating to bilevel PAP or volume-assured pressure support.<br /><br />Circadian Rhythm Disorders arise from misalignment of the internal clock with the external environment, commonly presenting as delayed sleep phase syndrome. Diagnosis includes sleep diaries and actigraphy; treatments focus on timed light exposure and melatonin.<br /><br />Insomnia is characterized by difficulty initiating or maintaining sleep with daytime impairment. Cognitive Behavioral Therapy for Insomnia (CBT-I) is preferred for long-term benefits, while pharmacotherapy (including non-benzodiazepine receptor agonists and dual orexin receptor antagonists) can be useful short-term.<br /><br />Hypersomnias, including narcolepsy types 1 and 2 and idiopathic hypersomnia, involve excessive daytime sleepiness verified by sleep studies such as the Multiple Sleep Latency Test. Treatments include stimulants (modafinil, solriamfetol), sodium oxybate (approved also for idiopathic hypersomnia), and behavioral strategies.<br /><br />Restless Legs Syndrome is diagnosed clinically with the URGE mnemonic (Urge to move, Rest induced, Gets better with activity, Evening worsening). Evaluation includes iron studies; treatment favors alpha-2-delta ligands over dopamine agonists, with the latter reserved for short-term use or refractory cases.<br /><br />Overall, the presentation emphasizes tailored diagnosis and management strategies for various sleep disorders, highlighting recent advances and evidence-based treatments.

Meta Tag

Concept Obesity Hypoventilation Syndrome

Concept Central Sleep Apnea

Concept Chronic Insomnia

Concept Narcolepsy

Concept Restless Legs Syndrome

Keywords

central sleep apnea

obesity hypoventilation syndrome

circadian rhythm disorders

insomnia

hypersomnia

restless legs syndrome

adaptive servo ventilation

positive airway pressure

cognitive behavioral therapy for insomnia

multiple sleep latency test

Obesity Hypoventilation Syndrome

Central Sleep Apnea

Chronic Insomnia

Narcolepsy

Restless Legs Syndrome