| HPO | high-presure oxygen; hydroperoxide; hydrophilic ointment; hypertrophic pulmonary osteoarthropathy |
|---|---|
| HPPO | high partial pressure of oxygen; hydroxyphenyl pyruvate oxidase |
| IPPO | intermittent positive-pressure inflation with oxygen |
| JSATO2 | jugular vein oxygen saturation |
| METS | metabolic equivalents [of oxygen consumption] |