MEDICAL AIR, USP
Clinical safety rating: caution
Comprehensive clinical and safety monograph for MEDICAL AIR, USP (MEDICAL AIR, USP).
Medical Air, USP is a mixture of gases (primarily oxygen and nitrogen) that provides physiological oxygen for cellular respiration.
| Metabolism | Not metabolized. |
| Excretion | Primarily exhaled unchanged via lungs; minimal non-pulmonary elimination (<5% metabolized or excreted renally as trace CO2 and water). |
| Half-life | Rapid washout; elimination half-life approximately 5-10 minutes with normal ventilation; clinically negligible accumulation. |
| Protein binding | Not applicable (gaseous agent; physiologically negligible binding). |
| Volume of Distribution | Not applicable (distributes primarily in lung gases and blood; apparent Vd ~ body water, ~0.5 L/kg, but clinically irrelevant as gas). |
| Bioavailability | Inhalation: near 100% (absorbed across alveolar-capillary membrane). |
| Onset of Action | Inhalation: within seconds to 1 minute for relief of hypoxia. |
| Duration of Action | Duration dependent on inspired concentration and ventilation; effects cease within minutes of discontinuation. |
Inhalation route: 1-15 L/min via mask or nasal cannula, titrated to maintain SpO2 ≥90%.
| Dosage form | GAS |
| Renal impairment | No adjustment required as renal function does not affect oxygen therapy. |
| Liver impairment | No adjustment required as hepatic function does not affect oxygen therapy. |
| Pediatric use | Inhalation: 0.5-2 L/min via mask or nasal cannula, titrated to maintain SpO2 ≥90%. |
| Geriatric use | Initiate at lower flow rates (e.g., 1-2 L/min) and titrate slowly due to increased risk of CO2 retention; monitor SpO2 and arterial blood gases. |
| 1st trimester | Consult provider |
| 2nd trimester | Consult provider |
| 3rd trimester | Consult provider |
Clinical note
Comprehensive clinical and safety monograph for MEDICAL AIR, USP (MEDICAL AIR, USP).
| Breastfeeding | Medical air is not excreted in breast milk; poses no risk to nursing infant. M/P ratio not applicable. |
| Teratogenic Risk | No teratogenic risk; medical air (21% oxygen, 79% nitrogen) is physiologic. No fetal harm at any trimester when administered at appropriate concentrations. |
| Fetal Monitoring | No specific monitoring required for medical air; monitor oxygen saturation if used as carrier for other gases. |
■ FDA Black Box Warning
None.
| Serious Effects |
Hypersensitivity to any component; use in hypoxic environments without proper oxygen supplementation.
| Precautions | Use only with medical-grade compressed air. Avoid contamination with oil or hydrocarbons. Use only in well-ventilated areas to prevent accumulation of expired carbon dioxide. |
Loading safety data…
| Fertility Effects | No known effects on fertility. |