| Ventilation (BTPS) | |
| Tidal volume (VT), L | 0.6 |
| Frequency (f), breaths/min | 12 |
| Minute ventilation (VE), L/min | 7.2 |
| Respiratory dead space (VD), mL | 150 |
| Alveolar ventilation, VA, L/min | 5.4 |
| Lung Volumes and Capacities (BTPS) | |
| Inspiratory capacity (IC), L | 3.0 |
| Expiratory reserve volume (ERV), L | 1.9 |
| Vital capacity (VC), L | 4.9 |
| Residual volume (RV), L | 1.4 |
| Functional residual capacity (FRC), L | 3.2 |
| Total lung capacity (TLC), L | 6.3 |
| Residual volume/total lung capacity × 100 (RV/TLC), % | 22 |
| Mechanics of Breathing | |
| Forced vital capacity (FVC), L | 4.9 |
| Forced expiratory volume, first second (FEV1), L | 4.0 |
| Maximum voluntary ventilation (MVV), L/min | 170 |
| Forced expiratory volume in 1 s/forced vital capacity × 100 (FEV1/FVC), % | 83 |
| Forced expiratory volume in 3 s/forced vital capacity × 100 (FEV3/FVC), % | 97 |
| Forced expiratory flow during middle half of FVC (FEF25–75), L/s | 4.7 |
| Forced inspiratory flow at the middle of forced inspiratory capacity (FIF50), L/s | 5.0 |
| Static compliance of the lungs (Cst, l), L/cm H2O | 0.2 |
| Compliance of lungs and thoracic cage (CRS, respiratory system compliance) L/cm H2O | 0.1 |
| Airway resistance at FRC (Raw), cm H2O/L/s | 1.5 |
| Pulmonary resistance at FRC, cm H2O/L/s | 2.0 |
| Airway conductance at FRC (Gaw), L/s/cm H2O | 0.66 |
| Specific conductance (Gaw/V1) | 0.22 |
| Maximum inspiratory pressure, mm Hg | – 75 |
| Maximum expiratory pressure, mm Hg | 120 |
| Distribution of Inspired Gas | |
| Single-breath N2 test (ΔN2 from 750 to 1250 mL in expired gas), % N2 | <1.5 |
| Alveolar N2 after 7 min of breathing O2, % N2 | <2.5 |
| Closing volume (CV), mL | 400 |
| CV/VC × 100, % | 8 |
| Closing capacity (CC), mL | 1900 |
| CC/TLC × 100,% | 30 |
| Slope of phase III in single-breath N2 test, % N2/L | <2 |
| Gas Exchange | |
| O2 consumption at rest (STPD), mL/min | 240 |
| CO2 output at rest (STPD), mL/min | 192 |
| Respiratory exchange ratio (R), CO2 output/O2 uptake | 0.8 |
| ALVEOLAR GAS | |
| PAO2, mm Hg | 105 |
| PACO2, mm Hg | 40 |
| ARTERIAL BLOOD | |
| PaO2, mm Hg | 95 |
| SaO2, % | 98 |
| pH | 7.40 |
| PaCO2, mm Hg | 40 |
| PaO2, while breathing 100% O2, mm Hg | 640 |
| Alveolar Ventilation and Gas Exchange | |
| Alveolar ventilation, L/min | 4.2 |
| Physiological dead space/tidal volume × 100 (VD/VT), % | <30 |
| Alveolar–arterial oxygen-gradient, (A-a) PO2, mm Hg | 10 |
| Diffusing Capacity | |
| Diffusing capacity at rest for CO, single-breath (DLCOsb), mL CO/min/mm Hg | 29 |
| Diffusing capacity per unit alveolar volume (DL/VA) | 4.8 |
| Control of Ventilation | |
| Ventilatory response to hypercapnia, L/min/per ΔPaCO2 mm Hg | >1.5 |
| Pulmonary Hemodynamics | |
| Pulmonary blood flow ... |