p-CSIproton craniospinal irradiation
P&Apercussion & auscultation
PACpremature atrial complexes
PACAPpituitary adenylate cyclase-activating polypeptide
PAco2alveolar carbon dioxide partial pressure
PACUpost anesthesia care unit
PADperipheral arterial disease
PAEProstate Artery Embolization
PAFparoxysmal atrial fibrillation
PAHpulmonary arterial hypertension
PAI-1plasminogen activator inhibitor-1
pAIRparaneoplastic autoimmune retinopathy
PALphenylalanine ammonia lyase
PALB2Partner and Localizer of BRCA2
PAMprotospacer adjacent motif
PAMG-1placental alpha microglobulin-1
PAMMparacentral acute middle maculopathy
PANDASPediatric Autoimmune Neuropsychiatric Disorders Associated with Streptococcal Infections
PANSPediatric Acute-onset Neuropsychiatric Syndrome
PAo2alveolar oxygen partial pressure
PAODPeripheral Arterial Occlusive Disease
PAPpositive airway pressure
PAPRPowered Air Purifying Respirator
PAR-1protease-activated receptor-1
PARDSpediatric acute respiratory distress syndrome
PARPpoly ADP ribose polymerase
PASpersonal assistance service(s)
PASCPost-Acute Sequelae of SARS-CoV-2 infection
PASIPsoriasis Area and Severity Index
PAUPenetrating Aortic Ulcer
PAVETPatient Assessment Validation Evaluation Test
PAWPpulmonary arterial wedge pressure
PAWSpost-acute-withdrawal syndrome
PBCprimary biliary cholangitis
pBNPNT-Pro B-Type Natriuretic Peptide
PBPpenicillin-binding protein
PBRTproton beam radiation therapy
PBTperioperative blood transfusion
PCApatient controlled analgesia
PCCMPediatric Critical Care Medicine
PCDpneumatic compression device
PCDAIPediatric Crohn’s Disease Activity Index
PCIpercutaneous coronary intervention
PCKDpolycystic kidney disease
PCLposterior cruciate ligament
PCNLPercutaneous Nephrolithotomy
PCNSLprimary central nervous system lymphoma
pCO2partial pressure of carbon dioxide
PCOSpolycystic ovarian syndrome
PCPphenylcyclohexyl piperidine
PCRpolymerase chain reaction
PCR-RFLPpolymerase chain reaction–restriction fragment length polymorphism
PCSpelvic congestion syndrome
PCSK9proprotein convertase subtilisin kexin 9
PD-L1programmed death-ligand 1
PDAposterior descending artery
PDACPricing, Data Analysis, and Coding
PDE5Phosphodiesterase-5 Inhibitor
PDGFplatelet derived growth factor
PDGFRAplatelet derived growth factor receptor alpha
PEApulseless electrical activity
PEAKPromoting Emergence of Advanced Knowledge
PEAK-DTPromoting Emergence of Advanced Knowledge Direct Training
PECARNPediatric Emergency Care Applied Research Network
PEDpigment epithelial detachment
PEEPpositive end expiratory pressure
PEFRpeak expiratory flow rate
PEGpercutaneous endoscopic gastrostomy
PEG-Jpercutaneous endoscopic gastro-jejunal
PEGylationattachment of polyethylene glycol
PEMpolidocanole endovenous microfoam
PEMSPoult Enteritis and Mortality Syndrome
PEPpositive expiratory pressure
PEQProsthesis Evaluation Questionnaire
PeRPplatelet-enriched plasma
PERRLpupils equal round and reactive to light
PERRLApupils equal, round, and reactive to light and accommodation
PERSpersonal emergency response system
PETpositron emission tomography
PFDpediatric feeding disorder
PFHplasma-free hemoglobin
PFPTpelvic floor physical therapy
PFSprogression-free survival
PFS6progression-free survival at six months
PFTpulmonary function test
pg/mLpicograms per milliliter
PGAPhysician Global Assessment
PGCGperipheral giant cell granuloma
PGDpreimplantation genetic diagnosis
PGSpreimplantation genetic screening
PGTPreimplantation Genetic Testing
PGT-APreimplantation Genetic Testing for Aneuploidy
PGT-Mpreimplantation genetic testing for monogenic disorder
PHEICPublic Health Emergency of International Concern
PHMMposterior horn of the medial meniscus
PHNpostherpetic neuralgia
PHPpartial hospitalization program
PHQpatient health questionnaire
PHVpercutaneously implanted heart valve
PI3Kphosphoinositide 3-kinase
PiB-PETPittsburgh compound B-positron emission tomography
PICAposterior inferior cerebellar artery
PICCperipherally inserted central catheter
PICOpopulation, intervention, comparator, and outcomes
PICUpediatric intensive care unit
PIDprimary immunodeficiency
PIDDprimary immunodeficiency disease
PIPpenile improvement protocol
PIVENSPioglitazone versus Vitamin E versus Placebo for the Treatment of Non-diabetic patients with Nonalcoholic steatohepatitis
PiZZprotease inhibitor ZZ
pJIApolyarticular Juvenile Idiopathic Arthritis
PKDparoxysmal kinesigenic dyskinesia
PKD1polycystic kidney disease 1
PKPpenetrating keratoplasty
PKRPartial Knee Replacement
PLApigmented lesion assay
PLA2RPhospholipase A2 Receptor
PLIFPosterior Lumbar Interbody Fusion
PLS-5Preschool Language Scale, Fifth edition
PLVposterolateral ventricular
PMApilomyxoid astrocytoma
PMATplasma membrane monoamine transporter
PMCpolymer-matrix composites
PMDBPrescription Monitoring Database
PMIpoint of maximum impulse (of the heart)
PMLprogressive multifocal leukoencephalopathy
PMNPolymorphonuclear Leukocyte
PMOphosphorodiamidate morpholino oligomer
PMPpyridoxamine phosphate
PMRTpostmastectomy radiation therapy
PNBprostate needle biopsy
PNDParoxysmal Nocturnal Dyspnea
PNESpsychogenic non-epileptic seizure
PNETprimitive neuroectodermal tumor
PNHParoxysmal Nocturnal Hemoglobinuria
PNIperipheral nerve injury
PNKDparoxysmal non-kinesigenic dyskinesia
PNSperipheral nerve stimulation
pO2partial pressure of oxygen
POAGprimary open-angle glaucoma
POBAplain old balloon angioplasty
POCpost-operative complications
POEMPer-Oral Endoscopic Myotomy
PONVpostoperative nausea and vomiting
POPpelvic organ prolapsed
POTSpostural orthostatic tachycardia syndrome
POU1F1Pituitary-Specific Positive Transcription Factor 1
POVPower-Operated Vehicle
pPCIprimary percutaneous coronary intervention
PPDpurified protein derivative
PPEpersonal protective equipment
PPGpterygopalatine ganglion
PPHProcedure for Prolapsed Hemorrhoids
PPIprotein-protein interaction
PPLprimary pancreatic lymphoma
PPROMpreterm premature rupture of membranes
PPSposterior probability of superiority
PPVpositive predictive value
PRBCpacked red blood cells
PRCplatelet-rich concentrate
PRCoVporcine respiratory coronavirus
PRESposterior reversible encephalopathy syndrome
PRGFPlatelet-Released Growth Factor
PRIPatient Review Instrument
PRISMAPreferred Reporting Items for Systematic Reviews and Meta-Analyses
PRKphotorefractive keratectomy
PRNpro re nata (as needed)
PROMpatient-reported outcome measure
PROP1homeobox protein prophet of pituitary-specific positive transcription factor 1
PRRT2Proline Rich Transmembrane Protein 2
PRVplanning at-risk volume
PSAprostate specific antigen
PSARPposterior sagittal anorectoplasty
PSCPapanicolaou Society of Cytopathology
PSFposterior spinal fusion
PSIpneumonia severity index
PSMpositive surgical margins
PSMAprostate-specific membrane antigen
PSPprogressive supranuclear palsy
PSPTpassive scattering proton therapy
PSVpressure support ventilation
PTCAPercutaneous Transluminal Coronary Angioplasty
PTEpulmonary thromboembolism
PTENphosphatase and tensin homolog
PTFEpolytetrafluoroethylene
PTHrPparathyroid hormone-related protein
PTKphototherapeutic keratectomy
PTPprotein tyrosine phosphatase
PTSParsonage-Turner syndrome
PTSDpost traumatic stress disorder
PTTpartial thromboplastin time
PTVplanning target volume
PULprostatic urethral lift
PUPpreviously untreated patient
PUVApsoralen and ultraviolet A
PVCpremature ventricular contraction
PVDperipheral vascular disease
PVIpulmonary vein isolation
PVPPhotoselective Vaporization of the Prostate
PVRpostvoid residual urine volume
PVSpulmonary vein stenosis