There are multiple definitions:

1. per os(Latin)

   • by mouth, orally, oral gavage (E)
   • iv
   • Therapeutic approaches, Microbiology, Infection
   • https://doi.org…2879-015-0933-9

2. pressure overload(English)

   • LVH
   • Cardiology

3. pulse-oximeter(English)

   • may refer to an earlobe sensor to monitor heart rate (HR) and oxygen saturation
   • HR, CoRSA
   • Bioengineering, Monitoring, Erythrocyte, Oxygen
   • https://doi.org…3341163.3347720

4. postero-orbital [sinus](English)

   • HRP, IO, PHA-L, PrV, TB, WGA
   • Brain (dys)function, Neurology
   • https://pubmed.…ih.gov/9302107/

5. postoperative [revision](English)

   • delayed revision of residual lesions resulted in worse patient outcomes when compared to intraoperative revisions
   • IO, NO
   • Surgery, Cardiology
   • https://doi.org…cvs.2014.07.073

6. potassium oxonate(English)

   • induces hyperuricemia
   • NLRP3, CPE-E
   • Potassium, Nutrition, Experimental animal
   • https://doi.org…3390/nu13082665

7. painful ophthalmoplegia(English)

   • BCVA, IOP, MRA, RPON
   • Pain, Ophthalmology
   • https://doi.org…55/2021/9213852