| Number | | Abbreviation | | Description | |
| 1. | | 17-OHS | | 17-hydroxysteroid (that is, 17-hydroxycorticosteroid) | |
| 2. | | 3TC | | lamivudine | |
| 3. | | 5-FU | | 5-fluorouracil | |
| 4. | | A Fib | | atrial fibrillation | |
| 5. | | A/a | | alveolar-arterial oxygen gradient | |
| 6. | | ABCs | | airway, breathing, circulation | |
| 7. | | ABG | | arterial blood gas | |
| 8. | | AC | | before meals (ante cibum) | |
| 9. | | AC | | acromioclavicular | |
| 10. | | ACE | | angiotensin-converting enzyme | |
| 11. | | ACLS | | Advanced Cardiac Life Support | |
| 12. | | ACOG | | American College of Obstetrics and Gynecology | |
| 13. | | ACTH | | adrenocorticotropic hormone | |
| 14. | | AD | | Alzheimer's dementia or disease | |
| 15. | | AFB | | acid-fast bacilli | |
| 16. | | AFP | | alpha-fetoprotein | |
| 17. | | AFV | | amniotic fluid volume | |
| 18. | | AGCUS | | atypical glandular cells of undetermined significance | |
| 19. | | AI | | amnioinfusion | |
| 20. | | AIDS | | acquired immunodeficiency syndrome | |
| 21. | | ALT | | alanine aminotransferase | |
| 22. | | ANA | | antinuclear antibody | |
| 23. | | ANCA | | antineutrophil cytoplasmic antibody | |
| 24. | | AP | | anteroposterior | |
| 25. | | APS | | antiphospholipid syndrome | |
| 26. | | APSAC | | anistreplase, anisoylated plasminogen-streptokinase activator complex | |
| 27. | | APTT | | activated partial thromboplastin | |
| 28. | | ARC | | AIDS-related complex | |
| 29. | | ARDS | | adult respiratory distress syndrome | |
| 30. | | ARF | | acute renal failure | |
| 31. | | ASA | | acetylsalicylic acid | |
| 32. | | ASAP | | as soon as possible | |
| 33. | | ASCUS | | atypical squamous cells of undetermined significance | |
| 34. | | ASO | | antistreptolysin O antibody | |
| 35. | | AST | | aspartate aminotransferase | |
| 36. | | ATN | | acute tubular necrosis | |
| 37. | | AV | | arteriovenous; atrioventricular | |
| 38. | | AZT | | zidovudine (Azidothymidine) | |
| 39. | | Atg | | anti-human thymocyte globulin | |
| 40. | | B12 | | vitamin B12 | |
| 41. | | BAER | | brainstem auditory evoked responses | |
| 42. | | BBT | | basal body temperature | |
| 43. | | BCG | | bacille Calmette-Guerin | |
| 44. | | BCP | | birth control pill | |
| 45. | | BHCG | | beta human chorionic gonadotropin | |
| 46. | | BID | | twice a day (bis in die) | |
| 47. | | BOOP | | bronchiolitis obliterans-organizing pneumonia | |
| 48. | | BP | | blood pressure | |
| 49. | | BPAD | | bipolar affective disorder | |
| 50. | | BPP | | biophysical profile | |
| 51. | | BPPV | | benign paroxysmal positional vertigo | |
| 52. | | BSA | | body surface area | |
| 53. | | BUN | | blood urea nitrogen | |
| 54. | | BV | | bacterial vaginosis | |
| 55. | | BVM | | bag valve mask | |
| 56. | | BiPAP | | bilevel positive airway pressure | |
| 57. | | C&S | | culture and sensitivity | |
| 58. | | C-peptide | | insulin chain C-peptide | |
| 59. | | C-section | | cesarean section | |
| 60. | | C-spine | | cervical spine | |
| 61. | | CABG | | coronary artery bypass graft | |
| 62. | | CACl2 | | calcium chloride | |
| 63. | | CAD | | coronary artery disease | |
| 64. | | CBC | | complete blood cell count | |
| 65. | | CD41 | | helper T cell (cluster of differentiation no. 41) | |
| 66. | | CDC | | Centers for Disease Control and Prevention, Atlanta, Ga. | |
| 67. | | CEA | | carcinoembryonic antigen | |
| 68. | | CFU | | colony-forming unit | |
| 69. | | CHF | | congestive heart failure | |
| 70. | | CIN | | cervical intraepithelial neoplasia (1 to 3: mild to severe) | |
| 71. | | CK | | creatine kinase | |
| 72. | | CLL | | chronic lymphocytic leukemia | |
| 73. | | CMV | | cytomegalovirus | |
| 74. | | CNS | | central nervous system | |
| 75. | | CO2 | | carbon dioxide | |
| 76. | | COPD | | chronic obstructive pulmonary disease | |
| 77. | | CPAP | | continuous positive airway pressure | |
| 78. | | CPD | | cephalopelvic disproportion | |
| 79. | | CPK | | creatine phosphokinase | |
| 80. | | CPPD | | calcium pyrophosphate dihydrate (crystals) (pseudogout) | |
| 81. | | CPR | | cardiopulmonary resuscitation | |
| 82. | | CRF | | chronic renal failure | |
| 83. | | CRP | | C-reactive protein | |
| 84. | | CSF | | cerebrospinal fluid | |
| 85. | | CST | | contraction stress fluid | |
| 86. | | CT | | computerized tomography | |
| 87. | | CVA | | cerebrovascular accident | |
| 88. | | CVAT | | costovertebral-angle tenderness | |
| 89. | | CVD | | cerebrovascular disease | |
| 90. | | CVN | | central venous nutrition | |
| 91. | | CVP | | central venous pressure | |
| 92. | | CVS | | cardiovascular system | |
| 93. | | CXR | | chest x-ray film or radiograph | |
| 94. | | Chol | | cholesterol | |
| 95. | | Cr | | creatinine | |
| 96. | | D&C | | dilatation and curettage | |
| 97. | | D/W | | dextrose in water | |
| 98. | | D4T | | stavudine | |
| 99. | | D5W | | 5% dextrose in water | |
| 100. | | DBP | | diastolic blood pressure | |
| 101. | | DDAVP | | 1-deamino-8-D-arginine vasopressin | |
| 102. | | DDC, ddC | | dideoxycytidine, zalcitabine, Hivid | |
| 103. | | DDI, ddI | | dideoxyinosine, didanosine | |
| 104. | | DHE | | dihydroergotamine | |
| 105. | | DHT | | dihydrotestosterone | |
| 106. | | DIC | | disseminated intravascular coagulation | |
| 107. | | DIP | | distal interphalangeal joint | |
| 108. | | DKA | | diabetic ketoacidosis | |
| 109. | | DM | | diabetes mellitus | |
| 110. | | DPL | | diagnostic peritoneal lavage | |
| 111. | | DPT | | diphtheria-pertussis-tetanus (vaccine) | |
| 112. | | DS | | double strength | |
| 113. | | DSM | | Diagnostic and Statistical Manual (of Mental Disorders) | |
| 114. | | DTR | | deep tendon reflexes | |
| 115. | | DTs | | delirium tremens | |
| 116. | | DVT | | deep venous thrombosis | |
| 117. | | EBV | | Epstein-Barr virus | |
| 118. | | ECF | | extracellular fluid | |
| 119. | | ECG | | electrocardiogram | |
| 120. | | ECMO | | extracorporeal membrane oxygenation | |
| 121. | | ED | | emergency department | |
| 122. | | EDC | | estimated date of confinement | |
| 123. | | EEG | | electroencephalogram | |
| 124. | | EES | | erythromycin ethylsuccinate | |
| 125. | | EGD | | esophagogastroduodenoscopy | |
| 126. | | EIA | | enzyme immunoassay | |
| 127. | | ELISA | | enzyme-linked immunosorbent assay | |
| 128. | | EM | | erythema multiforme | |
| 129. | | EMG | | electromyogram | |
| 130. | | ENG | | electronystagmography | |
| 131. | | ENT | | ear, nose, throat | |
| 132. | | ER | | emergency room | |
| 133. | | ERCP | | endoscopic retrograde cholangiopancreatography | |
| 134. | | ESR | | erythrocyte sedimentation rate | |
| 135. | | ET | | endotracheal tube | |
| 136. | | F/U | | follow-up (study, exam, test, care) | |
| 137. | | FB | | foreign body | |
| 138. | | FDA | | U.S. Food and Drug Administration | |
| 139. | | FEF | | forced expiratory flow | |
| 140. | | FENa | | fractional excretion of sodium | |
| 141. | | FEV1 | | forced expiratory volume at 1 second | |
| 142. | | FFP | | fresh frozen plasma | |
| 143. | | FH | | family history | |
| 144. | | FHR | | fetal heart rate | |
| 145. | | FSH | | follicle-stimulating hormone | |
| 146. | | FTA | | fluorescent treponemal antibody | |
| 147. | | FTA-ABS | | fluorescent treponemal antibody absorption (test) | |
| 148. | | FUO | | fever of unknown origin | |
| 149. | | Fe | | iron | |
| 150. | | G | | gauge | |
| 151. | | G6PD | | glucose-6-phosphate dehydrogenase | |
| 152. | | GBS | | group B Streptococcus bacteria, or group B streptococcal infection | |
| 153. | | GC | | gonococcus | |
| 154. | | GCS | | Glasgow Coma Scale | |
| 155. | | GCT | | glucose challenge test | |
| 156. | | GDM | | gestational diabetes mellitus | |
| 157. | | GE | | gastroesophageal | |
| 158. | | GFR | | glomerular filtration rate | |
| 159. | | GI | | gastrointestinal | |
| 160. | | GM-CSF | | granulocyte-macrophage colony-stimulating factor | |
| 161. | | GN | | glomerulonephritis | |
| 162. | | GODM | | gestational onset diabetes mellitus | |
| 163. | | GTT | | glucose tolerance test | |
| 164. | | GU | | genitourinary | |
| 165. | | GXT | | graded exercise stress test | |
| 166. | | GYN | | gynecologic | |
| 167. | | GnRH | | gonadotropin-releasing hormone | |
| 168. | | H&P | | history and physical examination | |
| 169. | | HA | | headache | |
| 170. | | HC/AC | | head circumference-to-abdominal circumference (ratio) | |
| 171. | | HCG | | human chorionic gonadotropin | |
| 172. | | HCT | | hematocrit | |
| 173. | | HCTZ | | hydrochlorothiazide | |
| 174. | | HDL | | high-density lipoprotein | |
| 175. | | HELLP | | hemolysis, elevated liver enzymes, and low platelet count (syndrome) | |
| 176. | | HGE | | human granulocytic ehrlichiosis | |
| 177. | | HIV | | human immunodeficiency virus | |
| 178. | | HME | | human monocytic erlichiosis | |
| 179. | | HMG | | human menopausal gonadotropin | |
| 180. | | HPF | | high-power field | |
| 181. | | HRT | | hormone replacement therapy | |
| 182. | | HS | | at bedtime (hora somni) | |
| 183. | | HSV | | herpes simplex virus | |
| 184. | | HTN | | hypertension | |
| 185. | | HUS | | hemolytic uremic syndrome | |
| 186. | | HZV | | herpes zoster virus | |
| 187. | | Hb | | hemoglobin | |
| 188. | | HepBsAg | | hepatitis B surface antigen | |
| 189. | | I&D | | incision and drainage | |
| 190. | | I&O | | intake and output | |
| 191. | | ICF | | intracellular fluid | |
| 192. | | ICP | | intracranial pressure | |
| 193. | | ICU | | intensive care unit | |
| 194. | | ID | | infectious disease | |
| 195. | | IDDM | | insulin-dependent diabetes mellitus | |
| 196. | | IFA | | immunofluorescence assay | |
| 197. | | IHSS | | idiopathic hypertrophic aortic stenosis | |
| 198. | | IM | | intramuscular | |
| 199. | | IMV | | intermittent mandatory ventilation | |
| 200. | | IN | | intranasally | |
| 201. | | INH | | isoniazid, isonicotinc acid hydrazide | |
| 202. | | INR | | International Normalized Ratio | |
| 203. | | IO | | intraosseous | |
| 204. | | IPPV | | intermittent positive-pressure ventilation | |
| 205. | | ISA | | intrinsic stimulating activity | |
| 206. | | ITP | | idiopathic thrombocytopenia purpura | |
| 207. | | IU | | International Unit | |
| 208. | | IUD | | intrauterine device | |
| 209. | | IUFD | | intrauterine fetal demise | |
| 210. | | IUGR | | intrauterine growth retardation | |
| 211. | | IUP | | intrauterine pregnancy | |
| 212. | | IV | | intravenous | |
| 213. | | IVDA | | intravenous drug abuser | |
| 214. | | IVP | | intravenous pyelogram | |
| 215. | | IgG | | immunoglobulin G | |
| 216. | | JRA | | juvenile rheumatoid arthritis | |
| 217. | | JVD | | jugular venous distension | |
| 218. | | K, K1 | | potassium | |
| 219. | | KOH | | potassium hydroxide | |
| 220. | | KS | | Kaposi's sarcoma | |
| 221. | | L/S | | lecithin-to-sphingomyelin (ratio) | |
| 222. | | LA | | lupus anticoagulant | |
| 223. | | LAT | | preparation of lidocaine, epinephrine (adrenaline), tetracaine | |
| 224. | | LBBB | | left bundle branch block | |
| 225. | | LDH | | lactate dehydrogenase | |
| 226. | | LDL | | low-density lipoprotein | |
| 227. | | LE | | lupus erythematosus | |
| 228. | | LES | | lower esophageal sphincter | |
| 229. | | LFT | | liver function tests | |
| 230. | | LGI | | lower GI (gastrointestinal) | |
| 231. | | LH | | luteinizing hormone | |
| 232. | | LLQ | | left lower quadrant | |
| 233. | | LMP | | last menstrual period | |
| 234. | | LMW | | low molecular weight | |
| 235. | | LOC | | loss of consciousness | |
| 236. | | LP | | lumbar puncture | |
| 237. | | LR | | lactated Ringer's solution | |
| 238. | | LSIL | | low-grade squamous intraepithelial lesion | |
| 239. | | LUQ | | left upper quadrant | |
| 240. | | LV | | left ventricular | |
| 241. | | MAI/MAC | | Mycobacterium avium-intracellulare/M. avium complex | |
| 242. | | MAO | | monoamine oxidase | |
| 243. | | MAOI | | monoamine oxidase inhibitors | |
| 244. | | MAST | | military antishock trousers | |
| 245. | | MCP | | metacarpophalangeal joint | |
| 246. | | MCV | | mean corpuscular volume | |
| 247. | | MDD | | major depressive disorder | |
| 248. | | MDI | | metered dose inhaler | |
| 249. | | MEE | | middle ear effusion | |
| 250. | | MI | | myocardial infarction | |
| 251. | | MMPI | | Minnesota Multiphasic Personality Inventory | |
| 252. | | MMR | | measles-mumps-rubella (vaccine) | |
| 253. | | MMSE | | Mini-Mental State examination | |
| 254. | | MR | | measles and rubella (vaccine) | |
| 255. | | MRI | | magnetic resonance imaging | |
| 256. | | MS | | multiple sclerosis | |
| 257. | | MTP | | metatarsophalangeal joint | |
| 258. | | MVP | | mitral valve prolaspe | |
| 259. | | N&V | | nausea and vomiting | |
| 260. | | NCV | | nerve conduction velocity | |
| 261. | | NG | | nasogastric | |
| 262. | | NHL | | non-Hodgkin's lymphoma | |
| 263. | | NIDDM | | non-insulin dependent diabetes mellitus | |
| 264. | | NPH | | neutral protamine Hagedorn | |
| 265. | | NPO | | nothing by mouth (nulla per os) | |
| 266. | | NS | | normal saline solution | |
| 267. | | NSAID | | nonsteroidal anti-inflammatory drug | |
| 268. | | NST | | nonstress test | |
| 269. | | NSVD | | normal spontaneous vaginal delivery | |
| 270. | | NTD | | neural tube defect | |
| 271. | | NTG | | nitroglycerin | |
| 272. | | O&P | | ova and parasites | |
| 273. | | OA | | osteoarthritis | |
| 274. | | OCD | | obsessive-compulsive disorder | |
| 275. | | OCP | | oral contraceptive pill | |
| 276. | | OM | | otitis media | |
| 277. | | OPV | | oral poliovirus | |
| 278. | | ORS | | WHO oral rehydration solution | |
| 279. | | OTC | | over the counter | |
| 280. | | PA | | posteroanterior | |
| 281. | | PAC | | premature atrial contraction | |
| 282. | | PALS | | Pediatric Advanced Life Support | |
| 283. | | PAS | | para-aminosalicylic acid | |
| 284. | | PCA | | patient-controlled analgesia | |
| 285. | | PCN | | penicillin | |
| 286. | | PCOD | | polycystic ovarian disease | |
| 287. | | PCP | | Pneumocystis pneumonia | |
| 288. | | PCR | | polymerase chain reaction | |
| 289. | | PCWP | | pulmonary capillary wedge pressure | |
| 290. | | PD | | Parkinson's disease | |
| 291. | | PDA | | patent ductus arteriosus | |
| 292. | | PE | | physical examination | |
| 293. | | PE | | pulmonary embolism | |
| 294. | | PEEP | | positive end-expiratory pressure | |
| 295. | | PEFR | | peak expiratory flow rate | |
| 296. | | PET | | positron emission tomography | |
| 297. | | PFTs | | pulmonary function tests | |
| 298. | | PG | | phosphatidylglycerol | |
| 299. | | PID | | pelvic inflammatory disease | |
| 300. | | PIH | | pregnancy-induced hypertension | |
| 301. | | PIP | | proximal interphalangeal joint | |
| 302. | | PMNs | | polymorphonuclear lymphocytes | |
| 303. | | PMR | | polymyalgia rheumatica | |
| 304. | | PMS | | premenstrual syndrome | |
| 305. | | PO | | per mouth (per os) | |
| 306. | | POD | | postoperative day | |
| 307. | | PPD | | protein purified derivative | |
| 308. | | PR | | per rectum | |
| 309. | | PRN | | as needed (pro re nata) | |
| 310. | | PROM | | premature rupture of membranes | |
| 311. | | PSA | | prostate specific antigen | |
| 312. | | PSVT | | paroxysmal supraventricular tachycardia | |
| 313. | | PT | | prothrombin time | |
| 314. | | PTCA | | percutaneous transluminal coronary angioplasty | |
| 315. | | PTL | | premature labor | |
| 316. | | PTSD | | post-traumatic stress disorder | |
| 317. | | PTT | | partial thromboplastin time | |
| 318. | | PTU | | propylthiouracil | |
| 319. | | PUD | | peptic ulcer disease | |
| 320. | | PVC | | premature ventricular contraction | |
| 321. | | Pap | | Papanicolaou test or smear | |
| 322. | | QD | | every day (quaque die) | |
| 323. | | QHS | | properly "every hour of sleep," but usually "at every bedtime" (quaque hora somni) | |
| 324. | | QID | | four times per day (quater in die) | |
| 325. | | QOD | | every other day (tertio quoque die) | |
| 326. | | R/O, r/o | | rule out | |
| 327. | | RA | | rheumatoid arthritis | |
| 328. | | RBC | | red blood cell | |
| 329. | | RCA | | right coronary artery | |
| 330. | | REM | | rapid eye movement | |
| 331. | | RF | | renal failure | |
| 332. | | RFI | | renal failure index | |
| 333. | | RIA | | radioimmunoassay | |
| 334. | | RIND | | reversible ischemic neurologic deficit | |
| 335. | | RLQ | | right lower quadrant | |
| 336. | | RMSF | | Rocky Mountain spotted fever | |
| 337. | | ROM | | rupture of membranes; range-of-motion (exercise) | |
| 338. | | RPR | | rapid plasma reagin | |
| 339. | | RSI | | rapid-sequence intubation | |
| 340. | | RSV | | respiratory syncytial virus | |
| 341. | | RUQ | | right upper quadrant | |
| 342. | | RVMI | | right ventricular myocardial infarction | |
| 343. | | SAARD | | slow-acting antirheumatic drug(s) | |
| 344. | | SAH | | subarachnoid hemorrhage | |
| 345. | | SBP | | systolic blood pressure | |
| 346. | | SCIWORA | | spinal cord injury without radiologic abnormality | |
| 347. | | SGA | | small for gestational age | |
| 348. | | SGOT | | See AST | |
| 349. | | SGPT | | See ALT | |
| 350. | | SIL | | squamous intraepithelial lesions | |
| 351. | | SK | | streptokinase | |
| 352. | | SL | | sublingual | |
| 353. | | SLE | | systemic lupus erythematosus | |
| 354. | | SLR | | straight-leg raising (test) | |
| 355. | | SOB | | shortness of breath | |
| 356. | | SPECT | | single-photon emission computerized tomography | |
| 357. | | SQ | | subcutaneous | |
| 358. | | SR | | slow release | |
| 359. | | SROM | | spontaneous rupture of membrane | |
| 360. | | SS | | single strength | |
| 361. | | SSKI | | saturated solution of potassium iodide | |
| 362. | | SSRI | | selective serotonin reuptake inhibitors | |
| 363. | | STD | | sexually transmitted disease | |
| 364. | | T3 | | triiodothyronine | |
| 365. | | T4 | | thyroxine | |
| 366. | | TAC | | preparation of tetracycline, epinephrine (adrenaline), cocaine | |
| 367. | | TBG | | thyroxine-binding globulin | |
| 368. | | TBSA | | total body surface area | |
| 369. | | TBW | | total body water | |
| 370. | | TCA | | tricyclic antidepressant | |
| 371. | | TEDS | | thromboembolic disease support (stockings, hose) | |
| 372. | | TEE | | transesophageal echocardiography | |
| 373. | | TENS | | transcutaneous electrical nerve stimulation | |
| 374. | | TFT | | thyroid function test | |
| 375. | | TG | | triglycerides | |
| 376. | | TIA | | transient ischemic attack | |
| 377. | | TIBC | | total iron-binding capacity | |
| 378. | | TM | | tympanic membrane | |
| 379. | | TMJ | | temporomandibular joint | |
| 380. | | TMP/SMX | | trimethoprim-sulfamethoxazole (complex) | |
| 381. | | TORCHS | | toxoplasmosis, rubella, cytomegalovirus, herpes simplex, syphilis (infection) | |
| 382. | | TPA | | tissue plasminogen activator | |
| 383. | | TPN | | total parenteral nutrition | |
| 384. | | TRH | | thyrotropin-releasing hormone | |
| 385. | | TSH | | thyroid-stimulating hormone | |
| 386. | | TTP | | thrombotic thrombocytopenic purpura | |
| 387. | | TURP | | transurethral prostatectomy | |
| 388. | | TWAR | | Taiwan acute respiratory disease | |
| 389. | | Tb, TB | | tuberculosis | |
| 390. | | U | | unit | |
| 391. | | U/P | | urine-to-plasma ratio | |
| 392. | | U/S | | ultrasound, ultrasonogram, ultrasonography | |
| 393. | | UA | | urinalysis | |
| 394. | | UC | | ulcerative colitis | |
| 395. | | UGI | | upper gastrointestinal (tract) | |
| 396. | | URI | | upper respiratory infection | |
| 397. | | UTI | | urinary tract infection | |
| 398. | | UV | | ultraviolet (radiation); B refers to the shorter-wave, more damaging range | |
| 399. | | V Fib | | ventricular fibrillation | |
| 400. | | V Tach | | ventricular tachycardia | |
| 401. | | V/Q | | ventilation-perfusion ratio | |
| 402. | | VBAC | | vaginal birth after cesarean section | |
| 403. | | VCUG | | voiding cystourethrogram | |
| 404. | | VDRL | | Venereal Disease Research Laboratories (test) | |
| 405. | | VSD | | ventricular septal defect | |
| 406. | | VT | | vestibular training | |
| 407. | | Vt | | tidal volume | |
| 408. | | WBC | | white blood cell (count) | |
| 409. | | aCL | | anticardiolipin (antibody) | |
| 410. | | bpm | | beats per minute | |
| 411. | | c-ANCA | | central antineutrophil cytoplasmic antibody | |
| 412. | | c/w | | consistent with | |
| 413. | | cap | | capsule | |
| 414. | | cc | | cubic centimeter (for solids and gases but ml for liquids) | |
| 415. | | cm | | centimeter | |
| 416. | | dl | | deciliter | |
| 417. | | dsDNA | | double-stranded deoxyribonucleic acid | |
| 418. | | g | | gram | |
| 419. | | gtt | | drops (guttae) | |
| 420. | | h, hr | | hour | |
| 421. | | h/o | | history of | |
| 422. | | ht, Ht | | height | |
| 423. | | kg | | kilogram | |
| 424. | | mEq | | milliequivalent | |
| 425. | | mOsm | | milliosmole | |
| 426. | | mcg | | microgram | |
| 427. | | min | | minute | |
| 428. | | mm Hg | | millimeters of mercury | |
| 429. | | mmg | | milligram | |
| 430. | | mmol | | millimole | |
| 431. | | osm, Osm | | osmole; osmolality | |
| 432. | | pH | | hydrogen-ion concentration; pH 7, normal; less is acidic; more is alkaline (or basic) | |
| 433. | | plt | | platelet | |
| 434. | | rt-PA | | tissue-type plasminogen activator (recombinant) (Alteplase, Recombinant) | |
| 435. | | sp. gr. | | specific gravity | |
| 436. | | vWF | | von Willebrand's factor | |
| 437. | | wt, Wt | | weight | |