| PA | alveolar pressure |
|---|---|
| PACO | mean alveolar gas volume |
| PACO2 | partial pressure of carbon dioxide in alveolar gas |
| PACP | pulmonary alveolar-capillary permeability; pulmonary artery counterpulsation |
| PAH | para-aminohippurate; phenylalanine hydrolase; polycyclic aromatic hydrocarbon; predicted adult heigh... |