Figures
- Figure 1
Evolution of the identification and definition of OHS. AASM: American Academy of Sleep Medicine.
Tables
- Table 1
Staging of hypoventilation in obesity
0 At risk BMI >30 kg·m−2 No hypercapnia 1 Obesity-associated sleep hypoventilation BMI >30 kg·m−2 Intermittent nocturnal hypercapnia; serum bicarbonate <27 mmol·L−1 2 Obesity-associated sleep hypoventilation BMI >30 kg·m−2 Intermittent nocturnal hypercapnia; serum daytime bicarbonate ≥27 mmol·L−1 3 Obesity hypoventilation BMI >30 kg·m−2 Sustained daytime hypercapnia (PaCO2 >45 mmHg) 4 Obesity hypoventilation syndrome BMI >30 kg·m−2 Sustained daytime hypercapnia with cardiometabolic abnormalities Reproduced and modified from [20] with permission.
- Table 2
Proposed classification system for obesity hypoventilation syndrome
Mild Moderate Severe PaCO2 (mmHg) 46–60 60–80 >80 PaO2 (mmHg) >70 60–70 <60 BMI (kg·m−2) 30–40 40–50 >50 Apnoea/hypopnoea index (events·h−1) <5 5–15 >15 Comorbidities No No Yes Reproduced from [21] with permission.
Vol 17 Issue 3
Table of Contents
Defining obesity hypoventilation syndrome
