FAQs
What are the hallmark OHS symptoms I should watch for?
The most common signs are persistent daytime sleepiness, shortness of breath that worsens when lying flat, frequent morning headaches, and loud, irregular snoring with pauses.
How does OHS differ from regular obesity‑related breathlessness?
OHS involves chronic carbon‑dioxide retention (high PaCO₂), which causes fatigue and headaches even at rest, whereas simple obesity‑related breathlessness is usually only exercise‑induced.
Which tests confirm an OHS diagnosis?
Key investigations include an overnight polysomnography (sleep study), arterial blood‑gas analysis to measure PaCO₂, and pulmonary function tests to assess lung mechanics.
What is the first‑line treatment for OHS?
Positive airway pressure therapy—typically CPAP, progressing to BiPAP if CO₂ remains elevated—is the cornerstone, combined with a structured weight‑loss program.
When should I consider bariatric surgery for OHS?
If lifestyle changes and PAP therapy fail to improve symptoms and you meet BMI criteria (≥ 35 kg/m² with comorbidities or ≥ 40 kg/m² with severe OHS), bariatric surgery may be recommended.
