| AHCA | Agency for Health Care Administration; American Health Care Association |
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| HCPCS | Health Care Financing Administration common procedural collecting system; Health Care Financing Admi... |
| PC | avoirdupois weight [Lat. pondus civile]; packed cells; paper chromatography; paracortex; parent cell... |
| HPA | Health Care Practice Act; Health Policy Agenda for the American People; health promotion advocates; ... |
| IPA | immunoperoxidase assay; incontinentia pigmenti achromians; independent physician or practice associa... |
| cladistic classification | <zoology> Classification based on recency of common descent, i.e. Categories depend on the position of the branching points on the inferred phylogenetic tree. (09 Jan 1998) |
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| classification | <zoology> The systematic arrangement of similar entities on the basis of certain differing characteristics and the basis of their relationships. (09 Jan 1998) |
| multiaxial classification | A procedure used in DSM-III-R for diagnosing patients on five axes: 1) psychiatric syndrome present; 2) patient's history of personality and developmental disorders; 3) possible nonmental medical disorders; 4) severity of psychosocial stressors; 5) highest level of adaptive functioning in the past year. (05 Mar 2000) |
| portal hypertension: classification | <radiology> Presinusoidal, extrahepatic: portal vein obstruction (extrinsic compression, phlebitis, OC, coagulopathy, tumour invasion, pancreatitis, neonatal omphalitis), dynamic: traumatic/neoplastic arterioportal fistula, segmental portal hypertension: splenic/superior mesenteric vein occlusion, intrahepatic (obstruction of portal venules): congenital hepatic fibrosis, primary biliary cirrhosis, sarcoid, myelofibrosis, schistosomiasis, idiopathic noncirrhotic fibrosis, Wilson disease, reticuloendotheliosis, Felty syndrome, chronic malaria, toxic fibrosis (arsenic, copper, PVC vapors) sinusoidal, cirrhosis, sclerosing cholangitis postsinusoidal, Budd-Chiari syndrome, constrictive pericarditis, congestive heart failure (12 Dec 1998) |
| Cummer's classification | A listing of several types of removable partial dentures in accordance with the distribution of direct retainers. (05 Mar 2000) |
| Salter-Harris classification of epiphysial plate injuries | The classification of epiphysial plate injuries into five groups (I to V), according to the pattern of damage to epiphysis, physis, and/or metaphysis; the classification correlates with different prognoses regarding the effects of the injury on subsequent growth and subsequent deformity of the epiphysis. (05 Mar 2000) |
| horizontal classification | <zoology> Classification which stresses grouping together taxa in a similar stage of evolution, rather than location on the same phyletic line. See: Vertical classification. (09 Jan 1998) |
| natural classification | <zoology> Classification based on inferences concerning the phylogenetic relationships of animals. (09 Jan 1998) |
| New York Heart Association classification | A functional classification to assess cardiovascular disability. Class I: patients with cardiac disease without limitation of physical activity. Ordinary activity does not cause symptoms. Class II: patients with cardiac disease with slight limitation of activity; comfortable at rest. Ordinary physical activity results in fatigue, palpitation, dyspnea or angina. Class III: patients with cardiac disease producing marked limitation of activity: comfortable at rest. Less than ordinary physical activity causes symptoms. Class IV: patients with cardiac disease resulting in inability to carry on any physical activity without discomfort. Symptoms may be present even at rest. (05 Mar 2000) |
| DeBakey's classification | Consists of three types: Type I extends into the transverse arch and distal aorta and type II is confined to the ascending aorta. Type III dissections begin in the descending aorta, with type IIIA extending toward the diaphragm and type IIIB extending below it. (05 Mar 2000) |
| Denver classification | A system of nomenclature for human mitotic chromosomes, based on length and position of the centromere. Origin: Denver,, Colourado, where agreed upon (05 Mar 2000) |
| Dukes' classification | A classification of the extent of operable adenocarcinoma of the colon or rectum commonly modified as follows: A (Duke's A), confined to the mucosa; B1, into the muscularis mucosae; B2, through the muscularis mucosae; C1, limited to the bowel wall, with nodal metastases; C2, through the bowel wall, with nodal metastases. (05 Mar 2000) |
| Tessier classification | An anatomical classification of facial, craniofacial, and laterofacial clefts that utilises the orbit as the primary structure for reference. Fifteen locations for clefts are differentiated. (05 Mar 2000) |
| E classification | <biochemistry> Classification of enzymes based on the recommendations of the Committee on Enzyme Nomenclature of the International Union of Biochemistry. The first number indicates the broad type of enzyme (1 = oxidoreductase, 2 = transferase, 3 = hydrolase, 4 = lyase, 5 = isomerase, 6 = ligase (synthetase)). The second and third numbers indicate subsidiary groupings and the last number, which is unique, is assigned arbitrarily in numerical order by the Committee. (08 Mar 2000) |
| TNM classification | TNM classification provides a system for staging the occurrence of cancer., T refers to the primary tumour and is categorised as being 1-4 and a-d depending upon site, size and spread, N refers to the lymph nodes and they are categorised as being X,0, 1, 2, or 3 depending upon if any, some or all are involved metastasis, and M to the presence or absence of distant metasteses. Refer Staging. (16 Dec 1997) |