Sleep Medicine
Sleep disorder evaluation, polysomnography interpretation, and CPAP management
Patient: Suresh Patil, 52M
UHID: UH-2026-0822
BMI: 34.2 (Obese Grade I)
Epworth Sleepiness Scale: 18/24 — Severe daytime sleepiness
STOP-BANG Score: 6/8 — High OSA risk
Referral: Cardiologist — pre-CABG OSA screening
Polysomnography (PSG) Results
| Parameter | Value | Reference | Interpretation |
|---|---|---|---|
| AHI (Apnoea-Hypopnoea Index) | 48 events/hr | < 5/hr | Severe OSA |
| Obstructive Apnoeas | 62% of events | — | Predominantly obstructive |
| Central Apnoeas | 12% of events | — | Minor central component |
| Oxygen Desaturation Index (ODI) | 44/hr | < 5/hr | Severe nocturnal hypoxaemia |
| SpO₂ nadir | 78% | > 90% | Severe — review cardiac risk |
| Total sleep time | 6h 12min | 7–9h | Mildly reduced |
| Sleep efficiency | 78% | > 85% | Reduced |
| REM sleep | 14% | 20–25% | REM suppressed — OSA effect |
Diagnosis:
Severe OSA (AHI 48)