Table 2 Respiratory changes with obesity [119–124]
From: Obesity: physiologic changes and implications for preoperative management
Parameter | Obesity-Related Change |
|---|---|
Work of breathing (WOB) | Increased |
Functional residual capacity (FRC) | Decreased |
Expiratory reserve volume (ERV) | Decreased |
Total lung capacity (TLC) | Unchanged, though decreased in severe obesity |
Vital capacity (VC) | Decreased |
Forced expiratory volume in 1Â s (FEV1) | Unchanged, though decreased in severe obesity |
Forced vital capacity (FVC) | Unchanged, though decreased in severe obesity |
FEV1/FVC | Unchanged, though decreased in severe obesity |
Diffusing capacity of the lung for carbon monoxide (DLCO) | Unchanged in simple obesity |