List of medical abbreviations: P
| Abbreviation | Meaning | 
|---|---|
| p̄ | after (from Latin post) [1] [letter p with a bar over it] | 
| P | parturition (total number of live births) phosphorus pulse[1] post | 
| POSM | plasma osmolality | 
| PA | posterior–anterior, posteroanterior pulmonary artery [[physician assistant or associate[2]]] psoriatic arthritis primary aldosteronism | 
| P&A | percussion and auscultation[1] phenol and alcohol matrixectomy | 
| PAC | premature atrial contraction pulmonary artery catheter, pulmonary artery catheterisation | 
| PACU | Post-anesthesia care unit[1] | 
| PAD | peripheral artery disease (aka peripheral artery occlusive disease) postadmission day (e.g. PAD 6 equals the sixth day of being in hospital) peripheral airspace disease Passively Acquired anti-D | 
| PAF | platelet-activating factor paroxysmal atrial fibrillation (meaning intermittent AF) | 
| PAH | pulmonary arterial hypertension phenylalanine hydroxylase | 
| PAI-1 | plasminogen activator inhibitor-1 | 
| PAL | posterior axillary line | 
| PALS | Pediatric advanced life support (training program) | 
| PAN | polyarteritis nodosa | 
| PAO | peak acid output | 
| PAOD | peripheral artery occlusive disease | 
| PAP | Papanicolaou stain positive airway pressure pulmonary artery pressure (see pulmonary hypertension) [1] pulmonary alveolar proteinosis | 
| Pap | Papanicolaou test (pap smear) | 
| PAPP-A | pregnancy-associated plasma protein A | 
| PARA I | indicating a woman with one child (partus = birth)[1] | 
| PARA II | indicating a woman with two children (partus = birth)[1] | 
| PASP | Pulmonary artery systolic pressure | 
| PASH | Pseudoangiomatous stromal hyperplasia | 
| PAT | paroxysmal atrial tachycardia | 
| PBC | primary biliary cirrhosis | 
| PBX | probiotics | 
| PBF | peripheral blood film | 
| p.c. | after food (from Latin post cibum) after meals | 
| PCA | patient-controlled analgesia | 
| PCa | prostate cancer | 
| PCD | postconcussional disorder primary ciliary dyskinesia | 
| Pcele | Pseudomeningocele | 
| PCI | percutaneous coronary intervention | 
| PCIOL | posterior chamber intraocular lens | 
| PCL | posterior cruciate ligament | 
| PCN | penicillin | 
| PCNL | Percutaneous nephrolithotomy | 
| PCNSL | primary CNS (central nervous system) lymphoma | 
| PCO | polycystic ovary (see polycystic ovary syndrome) | 
| PCOS | polycystic ovarian syndrome | 
| PCP | Pneumocystis carinii pneumonia (now called Pneumocystis pneumonia) primary care physician (also called primary care provider) | 
| PCR | patient care report polymerase chain reaction | 
| PCS | post-concussion syndrome | 
| PCT | progesterone challenge test Patient care technician | 
| PCV | packed cell volume (see hematocrit) polycythemia vera | 
| PCWP | pulmonary capillary wedge pressure | 
| PD | Parkinson's disease peritoneal dialysis physical diagnosis personality disorder program director | 
| PDA | patent ductus arteriosus posterior descending artery | 
| PDD | premenstrual dysphoric disorder | 
| PDE | phosphodiesterase | 
| PDGF | platelet-derived growth factor | 
| PDR | Physicians' Desk Reference | 
| PDT | photodynamic therapy | 
| PDVT | postoperative deep-vein thrombosis | 
| PE | pulmonary embolism[1] pre-eclampsia pleural effusion physical examination[1] | 
| PEA | pulseless electrical activity | 
| PERRLA | pupils equal, round and reactive to light[3] | 
| PEB | cisplatin, etoposide, and bleomycin (chemotherapy regimen) | 
| PEEP | positive end-expiratory pressure | 
| PEF | peak expiratory flow | 
| PEFR | peak expiratory flow rate | 
| PEG | percutaneous endoscopic gastrostomy | 
| PEM | protein/energy malnutrition (aka Kwashiorkor) | 
| pen | penicillin (Best practice is to avoid drug name abbreviations) | 
| PEP | Post-exposure prophylaxis[4] | 
| PERM | Progressive Encephalomyelitis with Rigidity and Myoclonus | 
| PERRL | pupils equal, round, reactive to light | 
| PERLA | pupils equal and reactive to light and accommodation[3] | 
| PERRLA | pupils equal, round, reactive to light and accommodation[3] | 
| Per Vag | per vagina | 
| PET | positron emission tomography (cerebral metabolic scan) | 
| PFO | patent foramen ovale | 
| PFT | pulmonary function test (see spirometry) | 
| PGCS | Paediatric Glasgow Coma Scale | 
| PH | Pulmonary hypertension Past history (see also medical history) | 
| PHx | past history (see also medical history) | 
| PHG | Portal hypertensive gastropathy | 
| PHN | postherpetic neuralgia | 
| PHP | Partial Hospitalization Program | 
| PHQ | Patient Health Questionnaire | 
| PHTLS | prehospital trauma life support | 
| PI | present illness | 
| PICC | peripherally inserted central catheter | 
| PID | pelvic inflammatory disease prolapsed intervertebral disc | 
| PIG-A | phosphatidyl inositol glycan A | 
| PIH | pregnancy induced hypertension | 
| PIP | proximal interphalangeal joint | 
| PJS | Peutz-Jeghers syndrome | 
| PK | protein kinase | 
| PKA | protein kinase A | 
| PKD | polycystic kidney disease | 
| PKP | penetrating keratoplasty | 
| PKU | phenylketonuria (PKU card—see Guthrie test) | 
| PLAT | tissue plasminogen activator | 
| PLIF | posterior lumbar interbody fusion (a type of spinal fusion) | 
| PLT | platelets | 
| PM | post meridiem (in the afternoon) | 
| PMB | post-menopausal bleeding (bleeding after menopause) | 
| PMD | primary medical doctor | 
| PMDD | premenstrual dysphoric disorder | 
| PMH | past medical history (see also medical history) perimesencephalic subarachnoid hemorrhage progressive macular hypomelanosis | 
| PMI | point of maximal impulse or apical beat point of maximal intensity | 
| PML | polyoma virus progressive multifocal leukoencephalopathy | 
| PMP | Pseudomyxoma peritonei | 
| PMN | polymorphonuclear leukocytes, that is, neutrophils | 
| PMR | percutaneous myocardial revascularization polymyalgia rheumatica proportionate mortality rate | 
| PM&R | physical medicine and rehabilitation | 
| PMS | premenstrual syndrome | 
| PNA | pneumonia | 
| PNA | postnatal age | 
| PND | paroxysmal nocturnal dyspnea postnasal drip | 
| PNET | primitive neuroectodermal tumor | 
| PNH | paroxysmal nocturnal hemoglobinuria | 
| PNM | perinatal mortality | 
| PNV | Prenatal vitamin | 
| PO | by mouth, that is, orally (from Latin per os) | 
| POA | (Health Care) Power of Attorney | 
| POC | postoperative care products of conception Plan of Care | 
| POCT | Point-Of-Care testing[5] | 
| POD | postoperative days | 
| POLST | Physician Orders for Life-Sustaining Treatment | 
| poly | polymorphonuclear cells, that is, neutrophils | 
| PONV | postoperative nausea and vomiting | 
| POP | pain on palpation, Plaster of Paris, Pelvic Organ Prolapse, Progestin Only Pills | 
| Post | posterior (see anatomical terms of location) | 
| POT | plan of treatment | 
| POTS | postural orthostatic tachycardia syndrome | 
| POX | peroxidase | 
| PP | pulse pressure postpartum, that is, postnatal postprandial | 
| PPCS | prolonged post-concussion syndrome | 
| PPD | packs per day (cigarettes) postpartum depression, that is, postnatal depression purified protein derivative or Mantoux test, for tuberculosis testing | 
| PPE | personal protective equipment | 
| PPF | posterior pharyngeal flap | 
| PPH | postpartum haemorrhage primary pulmonary hypertension procedure for prolapse and hemorrhoids | 
| PPI | proton pump inhibitor | 
| PPMS | Primary Progressive Multiple Sclerosis | 
| PPROM | preterm prelabor rupture of membranes | 
| PPS | post-polio syndrome | 
| Ppt | precipitate precipitating | 
| PPTCT | prevention of parent-to-child transmission (of HIV) (government of India initiative) | 
| PPTL | postpartum tubal ligation | 
| PPTP | Pediatric preclinical testing program | 
| PPV | positive predictive value positive pressure ventilation | 
| PPx | prophylaxis | 
| PR | prothrombin ratio | 
| p.r. | per rectum (as noun: rectal examination) | 
| PRA | plasma renin activity | 
| PRBC PRBCs | packed red blood cells | 
| PREA | Pediatric Research Equity Act | 
| Preme | premature infant (see premature birth) | 
| Prep PrEP | preparation | 
| PRES | Posterior reversible encephalopathy syndrome | 
| PRIND | prolonged reversible ischemic neurologic deficit | 
| PRL | prolactin | 
| prn PRN | as necessary (from Latin pro re nata) (if used in chronic pain control, sometimes disparagingly termed "pain relief nil") as needed | 
| Prog | prognosis | 
| PROM | prelabor rupture of membranespartial range of motion[1] | 
| PRP | panretinal photocoagulation platelet-rich plasma progressive rubella panencephalitis | 
| PRRE | purine-rich response element | 
| PRV | polycythemia rubra vera (see polycythemia vera) | 
| PSA | prostate-specific antigen | 
| PBSO | partial small bowel obstruction | 
| PSC | primary sclerosing cholangitis | 
| PSCH | preoperative systemic chemotherapy | 
| PSGN | poststreptococcal glomerulonephritis | 
| PSH | Paroxysmal sympathetic hyperactivity Past surgical history psychosocial history Past medical history (see also medical history) | 
| PSI | Pneumonia severity index | 
| PSP | phenylsulphtalein | 
| PSS | progressive systemic sclerosis (see scleroderma) | 
| PSVT | paroxysmal supraventricular tachycardia | 
| PT | prothrombin time physical therapy (physiotherapy) | 
| Pt. | patient (from Latin patiens, meaning "one who endures" or "one who suffers") | 
| PTA | percutaneous transluminal angioplasty post-traumatic amnesia prior to admission Peritonsillar abscess | 
| PTB | pulmonary tuberculosis | 
| PTC | percutaneous transhepatic cholangiography | 
| PTCA | percutaneous transluminal coronary angioplasty | 
| PTD | prior to discharge preterm delivery | 
| PTH | parathyroid hormone | 
| PTHC | percutaneous transhepatic cholangiography | 
| PTL | preterm labor | 
| PTSD | posttraumatic stress disorder | 
| PTSS | posttraumatic stress syndrome (see posttraumatic stress disorder) | 
| PTT | partial thromboplastin time | 
| PTU | propylthiouracil | 
| PTx | pneumothorax | 
| PU | palindromic unit | 
| PUBS | percutaneous umbilical blood sample | 
| PUD | peptic ulcer disease | 
| PUO | pyrexia of unknown origin | 
| PUVA | psoralen UV A (photochemical ultraviolet light A waves) | 
| p.v. | per vagina (as noun: vaginal examination with manual examination and speculum inspection) | 
| PV | polycythemia vera | 
| PVC (VPC) | premature ventricular contraction | 
| PVD | peripheral vascular disease | 
| PVFS | post-viral fatigue syndrome | 
| PVI | Peripheral vascular insufficiency Pulmonary vein isolation | 
| PVOD | Pulmonary venoocclusive disease | 
| PVR | pulmonary vascular resistance Postvoid residual urine volume | 
| PVS | persistent vegetative state pulmonary valve stenosis Plummer–Vinson syndrome | 
| PVT | Paroxysmal ventricular tachycardia | 
| PWD | Pink, warm, and dry (skin assessment) | 
| PWP | pulmonary wedge pressure | 
| Px px | physical examination prognosis patient | 
| P-Y | Pack-year (years of smoking multiplied by average number of packs, or fraction thereof, per day) | 
| PZA | pyrazinamide | 
References
    
- "Abbreviation List for Medical Record Documentation V20" (PDF). Madison Memorial Hospital.
- "Title Change".
- Hanley, Sharita. "PERRLA Eye Assessment: What It Is and How It Works". WebMD. Retrieved 2022-11-21.
- "PEP (post-exposure prophylaxis)". CDC.gov. CDC. May 25, 2021.
- "Definitions - Point-of-care testing". Australian Government Department of Health and Aged Care. May 14, 2013.
- "Pre-Exposure Prophylaxis (PrEP)". CDC.gov. CDC. July 5, 2022.
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