Internal Medicine Initialisms

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Internal Medicine Alphabet – P

S. No	Initialism	Full Form	Short Explanation	Practical Example
P001	PA	Pulmonary Artery	Major vessel carrying deoxygenated blood from heart to lungs.	PA pressure measured in pulmonary hypertension.
P002	PAB	Pulmonary Alveolar Barotrauma	Lung injury from pressure changes.	PAB seen in mechanical ventilation.
P003	PAC	Premature Atrial Contraction	Early heartbeat from atria.	PAC detected on ECG in palpitations.
P004	PACC	Pulmonary Alveolar Capillary Complex	Functional gas exchange unit.	PACC damaged in ARDS.
P005	PACO₂	Partial Pressure of Alveolar CO₂	Indicator of gas exchange.	PACO₂ measured in ABG analysis.
P006	PAD	Peripheral Arterial Disease	Narrowing of arteries in limbs.	PAD presents with claudication.
P007	PAF	Paroxysmal Atrial Fibrillation	Intermittent irregular heartbeat.	PAF treated with anticoagulants.
P008	PAG	Periaqueductal Gray	Brainstem region controlling pain.	PAG target in neuromodulation.
P009	PAH	Pulmonary Arterial Hypertension	High blood pressure in lung arteries.	PAH causes right heart failure.
P010	PAL	Physical Activity Level	Measure of daily activity.	PAL used in nutrition assessment.
P011	PAM	Progressive Atrophic Myopathy	Rare muscle wasting disorder.	PAM diagnosed via biopsy.
P012	PAN	Polyarteritis Nodosa	Necrotizing vasculitis of medium arteries.	PAN causes abdominal pain and hypertension.
P013	PAP	Pulmonary Alveolar Proteinosis	Rare lung disease with protein accumulation.	PAP treated with whole lung lavage.
P014	PAR	Post-Anesthesia Recovery	Immediate care after surgery.	PAR unit monitors vitals.
P015	PAS	Pulmonary Artery Stenosis	Narrowing of pulmonary artery.	PAS treated surgically.
P016	PAT	Paroxysmal Atrial Tachycardia	Sudden rapid atrial rhythm.	PAT seen in young adults.
P017	PAV	Pulmonary Alveolar Ventilation	Movement of air in alveoli.	PAV impaired in COPD.
P018	PAWP	Pulmonary Artery Wedge Pressure	Measure of left atrial pressure.	PAWP elevated in LV failure.
P019	PB	Phenobarbital	Anticonvulsant drug.	PB used in epilepsy.
P020	PBC	Primary Biliary Cholangitis	Autoimmune destruction of bile ducts.	PBC causes jaundice and pruritus.
P021	PBD	Pyogenic Brain Disease	Brain infection due to bacteria.	PBD includes abscesses.
P022	PBF	Pulmonary Blood Flow	Circulation of blood through lungs.	PBF measured in cardiac catheterization.
P023	PBI	Protein-Bound Iodine	Old thyroid function test.	PBI replaced by TSH assays.
P024	PBL	Peripheral Blood Lymphocyte	White blood cells in circulation.	PBL counts used in HIV monitoring.
P025	PBP	Penicillin-Binding Protein	Enzymes targeted by antibiotics.	PBP mutation causes MRSA.
P026	PBS	Phosphate-Buffered Saline	Laboratory buffer solution.	PBS used in immunoassays.
P027	PBT	Proton Beam Therapy	Radiation therapy using protons.	PBT used in brain tumors.
P028	PBV	Pulmonary Blood Volume	Volume of blood in pulmonary vessels.	PBV altered in heart failure.
P029	PC	Packed Cells	Concentrated red blood cells.	PC transfusion for anemia.
P030	PCA	Patient-Controlled Analgesia	Device allowing self-dosing of pain meds.	PCA pump used post-surgery.
P031	PCB	Polychlorinated Biphenyl	Toxic environmental chemical.	PCB exposure linked to cancer.
P032	PCC	Prothrombin Complex Concentrate	Blood product correcting clotting.	PCC used in warfarin reversal.
P033	PCD	Primary Ciliary Dyskinesia	Genetic disorder with immotile cilia.	PCD causes chronic sinusitis.
P034	PCE	Pulmonary Capillary Endothelium	Inner lining of lung capillaries.	PCE injury in ARDS.
P035	PCF	Peak Cough Flow	Measure of cough strength.	PCF reduced in neuromuscular disease.
P036	PCI	Percutaneous Coronary Intervention	Non-surgical artery opening.	PCI includes angioplasty + stent.
P037	PCL	Posterior Cruciate Ligament	Knee stabilizing ligament.	PCL tear in sports injuries.
P038	PCM	Paracetamol	Common analgesic/antipyretic.	PCM overdose causes liver damage.
P039	PCN	Penicillin	First widely used antibiotic.	PCN treats syphilis.
P040	PCP	Pneumocystis Pneumonia	Opportunistic lung infection in HIV.	PCP treated with TMP-SMX.
P041	PCR	Polymerase Chain Reaction	Technique to amplify DNA.	PCR used in COVID-19 testing.
P042	PCS	Post-Concussion Syndrome	Persistent symptoms after head injury.	PCS includes headache, dizziness.
P043	PCT	Procalcitonin	Biomarker for bacterial infection.	PCT elevated in sepsis.
P044	PCU	Progressive Care Unit	Intermediate hospital ward.	PCU admits unstable patients.
P045	PCV	Packed Cell Volume	Hematocrit measurement.	PCV reduced in anemia.
P046	PCWP	Pulmonary Capillary Wedge Pressure	Pressure reflecting left atrial load.	PCWP used in CHF management.
P047	PD	Peritoneal Dialysis	Dialysis via peritoneum.	PD used in renal failure.
P048	PDA	Patent Ductus Arteriosus	Persistent fetal vessel after birth.	PDA treated with surgery or indomethacin.
P049	PDD	Parkinson’s Disease Dementia	Cognitive decline in Parkinson’s.	PDD managed with cholinesterase inhibitors.
P050	PDE	Phosphodiesterase	Enzyme regulating cAMP/cGMP.	PDE inhibitors treat ED and CHF.

S. No	Initialism	Full Form	Short Explanation	Practical Example
P051	PCOS	Polycystic Ovary Syndrome	Hormonal disorder causing irregular cycles, cysts, and metabolic issues.	A young woman with irregular periods and acne diagnosed with PCOS.
P052	PCP	Pneumocystis Pneumonia	Opportunistic infection caused by Pneumocystis jirovecii in immunocompromised patients.	An HIV-positive patient develops PCP presenting with cough and hypoxia.
P053	PCV	Packed Cell Volume	Measurement of red cell proportion in blood, same as hematocrit.	PCV is checked in anemia diagnosis.
P054	PDA	Patent Ductus Arteriosus	A congenital heart defect where fetal ductus arteriosus fails to close.	A newborn presents with continuous murmur due to PDA.
P055	PDD	Pervasive Developmental Disorder	Group of neurodevelopmental disorders including autism spectrum.	A child with social interaction difficulty diagnosed with PDD.
P056	PEA	Pulseless Electrical Activity	Cardiac arrest rhythm with electrical activity but no pulse.	ACLS resuscitation performed in a patient with PEA.
P057	PEG	Percutaneous Endoscopic Gastrostomy	Tube inserted into stomach for long-term feeding.	A stroke patient with dysphagia receives a PEG tube.
P058	PEJ	Percutaneous Endoscopic Jejunostomy	Feeding tube inserted into the jejunum.	Used in gastric surgery patients for nutrition.
P059	PELD	Pediatric End-Stage Liver Disease Score	Score for assessing liver disease severity in children.	A child awaiting liver transplant evaluated with PELD.
P060	PE	Pulmonary Embolism	Blockage of pulmonary arteries by blood clot.	A patient with sudden chest pain and dyspnea diagnosed with PE.
P061	PEM	Protein Energy Malnutrition	Malnutrition due to inadequate protein and calories.	A child with marasmus exhibits PEM features.
P062	PEP	Post-Exposure Prophylaxis	Preventive treatment after exposure to infectious agents.	A nurse receives HIV PEP after a needle-stick injury.
P063	PF	Pulmonary Fibrosis	Chronic progressive scarring of lung tissue.	A patient with dry cough and dyspnea diagnosed with PF.
P064	PFA	Platelet Function Assay	Test assessing platelet aggregation and function.	Used in patients with unexplained bleeding tendency.
P065	PFT	Pulmonary Function Test	Measures lung volumes, capacity, and airflow.	Spirometry performed to assess asthma severity.
P066	PGD	Primary Graft Dysfunction	Severe dysfunction of transplanted organ soon after surgery.	Lung transplant patient develops PGD post-op.
P067	PGL	Paraganglioma	Rare neuroendocrine tumor arising from paraganglia.	Diagnosed in patient with hypertension and catecholamine excess.
P068	PGS	Preimplantation Genetic Screening	Genetic testing of embryos before IVF transfer.	Couple with recurrent miscarriage undergoes PGS.
P069	PI	Protease Inhibitor	Class of antiretroviral drugs for HIV.	Ritonavir used as PI in HIV treatment.
P070	PID	Pelvic Inflammatory Disease	Infection of female reproductive organs, often due to STDs.	Patient with pelvic pain and fever diagnosed with PID.
P071	PIE	Pulmonary Interstitial Emphysema	Air leaks into lung interstitium in neonates on ventilation.	Premature infant with respiratory distress develops PIE.
P072	PIV	Peripheral Intravenous Line	Cannula inserted into peripheral vein for fluid/drug administration.	A nurse inserts PIV for IV antibiotics.
P073	PKD	Polycystic Kidney Disease	Genetic disorder causing multiple kidney cysts and renal failure.	Ultrasound shows bilateral enlarged cystic kidneys.
P074	PKU	Phenylketonuria	Metabolic disorder with deficiency of phenylalanine hydroxylase.	Newborn screening identifies PKU to prevent mental retardation.
P075	PLD	Polycystic Liver Disease	Disorder characterized by multiple hepatic cysts.	Detected in patient with abdominal distension and PKD.
P076	PLE	Protein Losing Enteropathy	Excessive protein loss from intestines.	Patient with hypoalbuminemia and diarrhea diagnosed with PLE.
P077	PLF	Posterior Lumbar Fusion	Surgical procedure to stabilize the lumbar spine.	Spine surgeon performs PLF for degenerative spondylolisthesis.
P078	PLL	Posterior Longitudinal Ligament	Ligament along vertebral column preventing hyperflexion.	MRI shows PLL thickening in cervical stenosis.
P079	PMA	Progressive Muscular Atrophy	Neurodegenerative disease affecting motor neurons.	Patient presents with muscle weakness and wasting consistent with PMA.
P080	PMDD	Premenstrual Dysphoric Disorder	Severe mood disorder linked to menstrual cycle.	A woman with severe irritability and mood swings before menses has PMDD.
P081	PMH	Past Medical History	Record of a patient’s prior illnesses and treatments.	Doctor notes patient’s PMH of diabetes and hypertension.
P082	PMI	Point of Maximal Impulse	Area on chest where cardiac impulse is strongest.	PMI shifted laterally in a patient with LV hypertrophy.
P083	PMP	Pseudomyxoma Peritonei	Rare condition with mucinous tumors in the abdomen.	CT abdomen shows PMP with mucin deposits.
P084	PMS	Premenstrual Syndrome	Set of symptoms before menstruation including mood changes.	A woman reports PMS with bloating and irritability.
P085	PMV	Prolonged Mechanical Ventilation	Ventilation for more than 21 days.	A patient with ARDS required PMV in ICU.
P086	PN	Peripheral Neuropathy	Nerve damage in periphery, often due to diabetes.	A diabetic patient complains of tingling and numbness.
P087	PNA	Pneumonia	Infection of lung tissue by bacteria, virus, or fungi.	Chest X-ray shows consolidation in bacterial pneumonia.
P088	PND	Paroxysmal Nocturnal Dyspnea	Sudden breathlessness at night due to heart failure.	Patient wakes at night gasping for air – typical of PND.
P089	PNH	Paroxysmal Nocturnal Hemoglobinuria	Rare blood disorder with hemolysis and thrombosis.	A patient presents with hemoglobinuria in morning urine.
P090	PNP	Paraneoplastic Polyneuropathy	Nerve disorder associated with malignancy.	Patient with lung cancer develops PNP symptoms.
P091	PNS	Peripheral Nervous System	Nerves outside brain and spinal cord.	Guillain-Barré syndrome affects PNS.
P092	POC	Point of Care	Immediate medical care near patient location.	Glucometer used for POC blood glucose testing.
P093	POD	Post-Operative Day	Timeline marking days after surgery.	Notes record “POD 2” after appendectomy.
P094	POEMS	Polyneuropathy, Organomegaly, Endocrinopathy, M-protein, Skin changes	Rare paraneoplastic syndrome.	Patient with neuropathy and monoclonal gammopathy diagnosed with POEMS.
P095	PONV	Postoperative Nausea and Vomiting	Common surgical complication.	Antiemetics given to prevent PONV after anesthesia.
P096	POP	Pelvic Organ Prolapse	Weakening of pelvic floor muscles causing organ descent.	Woman presents with vaginal bulge and diagnosed with POP.
P097	POS	Positive	Lab or clinical test result indicating presence of condition.	HIV test reported POS for antibodies.
P098	POTTS	Pulmonary Tuberculosis	Chronic lung infection by Mycobacterium tuberculosis.	Cough with sputum positive for AFB suggests POTTS.
P099	PP	Postpartum	Period after childbirth.	Woman experiencing depression in PP period.
P100	PPD	Purified Protein Derivative	Tuberculin antigen used in Mantoux test.	PPD test positive in latent TB infection.
P101	PPI	Proton Pump Inhibitor	Class of drugs reducing gastric acid secretion.	Omeprazole prescribed for GERD.
P102	PPM	Permanent Pacemaker	Implanted device to regulate heart rhythm.	Bradycardia patient treated with PPM.
P103	PPR	Progressive Primary Relapsing	MS type characterized by progression with relapses.	Patient with progressive symptoms diagnosed with PPR-MS.
P104	PPS	Post-Polio Syndrome	Late complication of polio with muscle weakness.	Polio survivor develops PPS decades later.
P105	PPT	Partial Prothrombin Time	Test for coagulation pathway evaluation.	Used in monitoring heparin therapy.
P106	PPV	Positive Predictive Value	Probability that positive test reflects true disease.	PPV used to evaluate diagnostic test reliability.
P107	PR	Per Rectum	Examination or administration route via rectum.	Doctor performs PR exam to check prostate.
P108	PRA	Plasma Renin Activity	Assesses renin-angiotensin system.	High PRA in renal artery stenosis.
P109	PRBC	Packed Red Blood Cells	Blood product used in transfusion.	Severe anemia treated with PRBC transfusion.
P110	PRF	Platelet Rich Fibrin	Used in regenerative medicine for healing.	PRF applied in dental surgery for faster recovery.
P111	PRK	Photorefractive Keratectomy	Eye surgery to correct vision.	Patient undergoes PRK for myopia.
P112	PRL	Prolactin	Hormone regulating lactation.	Elevated PRL in pituitary adenoma.
P113	PROG	Progesterone	Hormone important in menstrual cycle and pregnancy.	Progesterone supplementation in IVF cycles.
P114	PRP	Platelet Rich Plasma	Autologous plasma used for healing and regeneration.	PRP injections for knee osteoarthritis.
P115	PRV	Polycythemia Rubra Vera	Blood disorder with increased red cell mass.	Patient with high hematocrit diagnosed with PRV.
P116	PSA	Prostate Specific Antigen	Marker used in prostate cancer screening.	PSA elevated in BPH and prostate cancer.
P117	PSC	Primary Sclerosing Cholangitis	Chronic liver disease with bile duct inflammation.	PSC diagnosed in patient with IBD and jaundice.
P118	PSD	Psychiatric Disorder	General term for mental health disorders.	Patient presents with depression, a common PSD.
P119	PSE	Portal-Systemic Encephalopathy	Neurological dysfunction due to liver failure.	Confused cirrhosis patient diagnosed with PSE.
P120	PSH	Past Surgical History	Record of surgeries undergone by patient.	PSH notes cholecystectomy 5 years ago.
P121	PSI	Pneumonia Severity Index	Risk stratification score for pneumonia patients.	PSI used to decide outpatient vs inpatient treatment.
P122	PSM	Primary Sternal Malignancy	Rare tumors arising in sternum.	Chest mass biopsy reveals PSM.
P123	PSP	Progressive Supranuclear Palsy	Neurodegenerative disorder with impaired movement and eye movements.	Elderly man with falls and gaze palsy diagnosed with PSP.
P124	PSVT	Paroxysmal Supraventricular Tachycardia	Sudden episodes of rapid heart rate.	Patient with palpitations diagnosed with PSVT.
P125	PT	Prothrombin Time	Coagulation test for extrinsic pathway.	PT prolonged in warfarin therapy.
P126	PTA	Peritonsillar Abscess	Collection of pus beside tonsil.	Patient with sore throat and muffled voice diagnosed with PTA.
P127	PTCA	Percutaneous Transluminal Coronary Angioplasty	Balloon dilation of coronary arteries.	Performed in patient with acute MI.
P128	PTCL	Peripheral T-cell Lymphoma	Rare aggressive non-Hodgkin lymphoma.	Biopsy confirms PTCL in a patient with lymphadenopathy.
P129	PTEN	Phosphatase and Tensin Homolog	Tumor suppressor gene mutation linked to cancers.	Genetic testing reveals PTEN mutation.
P130	PTLD	Post-Transplant Lymphoproliferative Disorder	Lymphoid proliferation after transplantation due to immunosuppression.	PTLD detected in renal transplant recipient.
P131	PTH	Parathyroid Hormone	Regulates calcium and phosphate balance.	Elevated PTH in primary hyperparathyroidism.
P132	PTI	Paroxysmal Tachyarrhythmia	Episodic abnormal heart rhythm.	Holter monitoring detects PTI.
P133	PTL	Preterm Labor	Labor before 37 weeks of pregnancy.	Woman with contractions at 34 weeks diagnosed with PTL.
P134	PTN	Pleotrophin	Growth factor involved in angiogenesis.	Research studies PTN in tumor progression.
P135	PTP	Post-Thrombotic Syndrome	Chronic complication after DVT.	Patient with leg swelling and pain after DVT has PTP.
P136	PTR	Partial Tumor Resection	Incomplete removal of tumor.	PTR performed when tumor encased vital structures.
P137	PTS	Post-Traumatic Stress	Mental health condition after trauma.	War veteran with flashbacks suffers PTS.
P138	PTT	Partial Thromboplastin Time	Coagulation test for intrinsic pathway.	PTT prolonged in hemophilia.
P139	PTX	Pneumothorax	Presence of air in pleural cavity.	Chest X-ray shows PTX in trauma patient.
P140	PU	Peptic Ulcer	Ulceration in stomach or duodenum due to acid.	Endoscopy reveals duodenal ulcer.
P141	PUD	Peptic Ulcer Disease	Chronic condition with gastric/duodenal ulcers.	Patient with epigastric pain diagnosed with PUD.
P142	PUK	Peripheral Ulcerative Keratitis	Severe corneal inflammation linked to autoimmune disease.	RA patient develops PUK with vision loss.
P143	PUL	Pulmonic	Relating to the pulmonary circulation.	PUL valve stenosis seen in congenital heart disease.
P144	PUPPP	Pruritic Urticarial Papules and Plaques of Pregnancy	Benign itchy rash during pregnancy.	Pregnant woman develops rash diagnosed as PUPPP.
P145	PVD	Peripheral Vascular Disease	Narrowing of peripheral arteries causing poor circulation.	Diabetic patient with leg claudication has PVD.
P146	PVL	Periventricular Leukomalacia	Brain white matter injury in premature infants.	Ultrasound reveals PVL in neonate with cerebral palsy risk.
P147	PVO	Pulmonary Veno-Occlusive Disease	Rare cause of pulmonary hypertension due to venous obstruction.	Patient with dyspnea diagnosed with PVO.
P148	PVR	Pulmonary Vascular Resistance	Measure of resistance in pulmonary circulation.	PVR elevated in pulmonary hypertension.
P149	PW	Pulse Wave	Wave of blood flow detected in arteries.	PW velocity used in vascular studies.
P150	PWB	Partial Weight Bearing	Restriction after orthopedic surgery.	Patient instructed PWB after hip fracture surgery.
P151	PWP	Pulmonary Wedge Pressure	Reflects left atrial pressure measured via catheter.	Elevated PWP seen in heart failure.
P152	PXE	Pseudoxanthoma Elasticum	Rare genetic disease affecting connective tissue.	Patient develops retinal changes in PXE.
P153	PYO	Pyometra	Accumulation of pus in the uterus.	Elderly woman with fever and discharge diagnosed with PYO.
P154	PYR	Pyridoxine	Vitamin B6 essential for metabolism.	Supplement prescribed in TB therapy with isoniazid.
P155	PZQ	Praziquantel	Antiparasitic drug used for schistosomiasis.	PZQ given for treatment of tapeworm.
P156	PZP	Pregnancy Zone Protein	Estrogen-dependent plasma protein.	Elevated PZP noted during pregnancy.
P157	PZO	Pseudomonas Zosteriform Opportunistic Infection	Opportunistic infection resembling shingles.	PZO seen in immunocompromised patients.
P158	PZD	Pancreatic Zymogen Disorder	Disorder involving pancreatic enzyme precursors.	PZD linked to recurrent pancreatitis.
P159	PZC	Plasma Zinc Concentration	Level of zinc in blood plasma.	PZC checked in malnutrition assessment.
P160	PZM	Parazoa Microbiology	Classification of primitive multicellular organisms.	Used in research biology and medicine.
P161	PZR	Paraneoplastic Zinc Response	Rare phenomenon of zinc imbalance in malignancy.	Case report identifies PZR in cancer patient.
P162	PZS	Progressive Zoonotic Syndrome	Infections spreading from animals to humans.	Rabies considered a form of PZS.
P163	PZT	Piezoelectric Technology	Medical ultrasound technology using crystals.	PZT crystals in ultrasound probe.
P164	PZV	Pediatric Zoster Vaccine	Vaccine against herpes zoster in children.	Given to immunocompromised pediatric patients.
P165	PZX	Proximal Zone X	Experimental classification in radiology.	Research term used in diagnostic imaging.
P166	PZY	Polyzygotic	Development from multiple zygotes.	Describes multiple births in obstetrics.
P167	PZZ	Pseudo-Zollinger Zinger Syndrome	Mimics Zollinger-Ellison syndrome but with different cause.	Patient with ulcers diagnosed with PZZ.

S. No	Initialism	Full Form	Short Explanation	Practical Example
P168	PQ	Paroxysmal QRS	Sudden abnormal QRS complexes on ECG.	Detected in patient with ventricular ectopy.
P169	PRM	Pattern Recognition Memory	Cognitive function test assessing memory patterns.	Used in neuropsychological evaluation of dementia.
P170	PRN	Pro Re Nata (As Needed)	Medication administered when required.	Painkillers prescribed PRN for post-op pain.
P171	PRO	Patient-Reported Outcome	Health status information reported by patient.	PRO questionnaires assess quality of life in chronic illness.
P172	PRP	Pulsed Radiofrequency Procedure	Pain management technique using radiofrequency energy.	PRP applied to chronic neuropathic pain.
P173	PRS	Partial Remission Status	Disease state with partial improvement.	Cancer patient achieves PRS after chemotherapy.
P174	PST	Primary Screening Test	Initial test to detect disease in asymptomatic individuals.	PST for diabetes using fasting glucose.
P175	PT	Physical Therapy	Rehabilitation treatment using exercises and modalities.	Stroke patient undergoes PT to regain mobility.
P176	PTA	Percutaneous Transluminal Angioplasty	Balloon dilation of blood vessels.	PTA performed in peripheral arterial disease.
P177	PTC	Percutaneous Transhepatic Cholangiography	Imaging of bile ducts through the liver.	PTC done for obstructive jaundice.
P178	PTH	Parathyroid Hormone	Hormone regulating calcium-phosphate metabolism.	Elevated PTH indicates primary hyperparathyroidism.
P179	PTI	Platelet Transfusion Interval	Time between platelet transfusions.	PTI monitored in thrombocytopenic patients.
P180	PTL	Preterm Labor	Labor occurring before 37 weeks of gestation.	Patient with contractions at 34 weeks diagnosed with PTL.
P181	PTN	Pulmonary Thrombosis Network	Specialized care network for pulmonary thrombosis.	PTN coordinates anticoagulation therapy.
P182	PTP	Protein Tyrosine Phosphatase	Enzyme involved in cell signaling.	PTP studied in cancer research.
P183	PTS	Post-Thrombotic Syndrome	Chronic venous insufficiency after DVT.	Patient with leg swelling and pain diagnosed with PTS.
P184	PTT	Partial Thromboplastin Time	Coagulation test assessing intrinsic pathway.	PTT monitored in heparin therapy.
P185	PTX	Pneumothorax	Air in pleural cavity causing lung collapse.	Chest tube inserted for traumatic PTX.
P186	PU	Peptic Ulcer	Ulceration of stomach or duodenum.	Endoscopy reveals PU in patient with epigastric pain.
P187	PUD	Peptic Ulcer Disease	Chronic condition with recurrent gastric/duodenal ulcers.	Patient treated with PPI and H. pylori eradication.
P188	PUK	Peripheral Ulcerative Keratitis	Corneal ulceration usually autoimmune.	RA patient presents with PUK.
P189	PUL	Pulmonic	Relating to pulmonary circulation or valve.	Pulmonic stenosis noted on echocardiography.
P190	PUPPP	Pruritic Urticarial Papules and Plaques of Pregnancy	Benign itchy rash in pregnancy.	Rash appears in third trimester, diagnosed as PUPPP.
P191	PVD	Peripheral Vascular Disease	Narrowing of peripheral arteries leading to ischemia.	Diabetic patient with leg ulcers has PVD.
P192	PVL	Periventricular Leukomalacia	White matter brain injury in premature infants.	MRI shows PVL in neonate with motor delays.
P193	PVO	Pulmonary Veno-Occlusive Disease	Obstructive pulmonary venous disease causing hypertension.	Dyspnea on exertion leads to diagnosis of PVO.
P194	PVR	Pulmonary Vascular Resistance	Resistance in pulmonary circulation.	PVR increased in pulmonary hypertension.
P195	PW	Pulse Wave	Blood flow wave detected in arteries.	PW velocity measured for arterial stiffness assessment.
P196	PWB	Partial Weight Bearing	Limitation of weight on limb post-surgery.	Patient instructed PWB after hip replacement.
P197	PWP	Pulmonary Wedge Pressure	Measures left atrial pressure via catheterization.	Elevated PWP in congestive heart failure.
P198	PXE	Pseudoxanthoma Elasticum	Genetic disorder of connective tissue.	Skin and retinal changes suggest PXE.
P199	PYO	Pyometra	Accumulation of pus in the uterus.	Elderly woman presents with fever and PYO confirmed on ultrasound.
P200	PYR	Pyridoxine	Vitamin B6 essential for metabolic reactions.	Supplementation of PYR in isoniazid therapy to prevent neuropathy.