Sleep-related hypoventilation or hypoxemia disorders

Description

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).

Exclusions from above levels

KB2A – Apnoea of newborn

Child codes

7A42.0 – Obesity hypoventilation syndrome
7A42.1 – Congenital central alveolar sleep-related hypoventilation
7A42.2 – Non-congenital central hypoventilation with hypothalamic abnormalities
7A42.3 – Idiopathic central alveolar hypoventilation
7A42.4 – Sleep-related hypoventilation due to a medication or substance
7A42.5 – Sleep-related hypoventilation due to medical condition
7A42.6 – Sleep-related hypoxemia due to a medical condition
7A42.Y – Other specified sleep-related hypoventilation or hypoxemia disorders
7A42.Z – Sleep-related hypoventilation or hypoxemia disorders, unspecified

Sibling codes

7A40 – Central sleep apnoeas
7A41 – Obstructive sleep apnoea
7A4Y – Other specified sleep-related breathing disorders
7A4Z – Sleep-related breathing disorders, unspecified

Foundation entity

Part of: 07: Sleep-wake disorders