Table 2.
Chest wall strapping, expiratory flows, and lung mechanics in healthy subjects
| First Author, Year (Ref.) | n | FEF at 50% TLC | Conductance | Lung Compliance 50% TLC | Lung Elastic Recoil 50% TLC |
|---|---|---|---|---|---|
| Caro, 1960 (3) | 25 | — | +9% (overall) | −38%* | +185* |
| Butler, 1960 (2) | 10 | — | ↑↑† | ↓↓† | — |
| Stubbs, 1972 (8) | 8 | +188% | +43% (50% TLC) | −33% | +164% |
| Sybrecht, 1975 (9) | 5 | +133% | −43% | ||
| Bradley, 1980 (1) | 8 | +150%‡ | −59% | +244% | |
| Douglas, 1981 (4) | 6 | +148%§ | ↑↑ | — | +139%‡ |
| Klineberg, 1981 (5) | 7 | +181% | −48% | +151% | |
| Scheidt, 1981 (7) | 10 | +167%‡ | +188% | ||
| Noord, 1986 (10) | 14 | +147% | +24% (50% TLC) | ||
| O’Donnell, 2000 (6) | 12 | — | +35% (sGaw) | ||
| Weighted mean, % (SE) | +159% (2.3) | +32% (1.3) | −42% (1.1) | +182% (3.6) |
Definition of abbreviations: FEF = forced expiratory airflow; FRC = functional residual capacity; sGaw = specific conductance; TLC = total lung capacity.
*
Measured at control FRC.
†
Graphic display of conductance and compliance over the entire lung volume range. At each lung volume, conductance and compliance were significantly higher/lower, respectively.
‡
At 40% TLC.
§
At 30% of vital capacity.