Sleep-related hypoventilation or hypoxemia disorders

Definition

The primary feature of these disorders is insufficient sleep related ventilation, resulting in abnormally elevated arterial partial pressure of carbon dioxide (PaCO2) during sleep. Sleep-related hypoxemia is diagnosed when overnight monitoring reveals sustained (> 5 minutes) decline in oxygen saturation to ≤ 88% in adults (or ≤ 90% in children) for ≥ 5 minutes. Note: A definitive diagnosis requires objective evidence based on polysomnography as well as carbon dioxide (CO2) monitoring during sleep (by arterial, end-tidal or transcutaneous measures).

9 subordinate codes

• 7A42.0Obesity hypoventilation syndrome
• 7A42.1Congenital central alveolar sleep-related hypoventilation
• 7A42.2Non-congenital central hypoventilation with hypothalamic abnormalities
• 7A42.3Idiopathic central alveolar hypoventilation
• 7A42.4Sleep-related hypoventilation due to a medication or substance
• 7A42.5Sleep-related hypoventilation due to medical condition
• 7A42.6Sleep-related hypoxemia due to a medical condition
• 4B4YOther specified diseases of the immune system
• 4B4ZDiseases of the immune system, unspecified

Nearby in Sleep-related breathing disorders

• 7A40Central sleep apnoeas
• 7A41Obstructive sleep apnoea
• 4B4YOther specified diseases of the immune system
• 4B4ZDiseases of the immune system, unspecified