Coagulation factor VIII.recombinant.bound/von Willebrand factor (vWf) Ag in Plasma by Immunoassay 90919-2
LOINC Code
| LOINC code | 90919-2 | ||
|---|---|---|---|
| name | Coagulation factor VIII.recombinant.bound/von Willebrand factor (vWf) Ag in Plasma by Immunoassay | ||
| description | This test measures the binding activity of von Willebrand factor (vWF) to Factor VIII as the ratio of the amount of exogenous recombinant Factor VIII bound to vWF in the patient sample to the amount of vWF in the patient sample. It is used to differentiate between various bleeding disorders including hemophilia A and type 2N von Willebrand disease (2N vWD, VWD2N, or Type 2 Normandy). Type 2N vWD is caused by mutations to the Factor VIII binding site of vWF, which results in reduced binding and faster clearance of Factor VIII. Patients with type 2N vWD usually have reduced Factor VIII activity with normal VWF levels. [PMID: 19298374] | ||
| status | ACTIVE | ||
Fully-Specified Name | |||
| component | Coagulation factor VIII.recombinant.bound/von Willebrand factor Ag | ||
| property | RelRto = Relative Ratio | ||
| time | Pt = Point in time: To identify measures at a point in time. This is a synonym for “spot” or “random” as applied to urine measurements. | ||
| system | Plas = Plasma | ||
| scale | Qn = Quantitative: The result of the test is a numeric value that relates to a continuous numeric scale. Reported either as an integer, a ratio, a real number, or a range. The test result value may optionally contain a relational operator from the set {<=, <, >, >=}. Valid values for a quantitative test are of the form "7", "-7", "7.4", "-7.4", "7.8912", "0.125", "<10", "<10.15", ">12000", 1-10, 1:256 | ||
| method | IA = Immunoassay: Encompasses all immunoassays with a few exceptions, including Immune Blot and Immune Fluorescence, which were created based on historic usage. | ||
Additional Names | |||
| short name | Fact VIII.recomb.bound/vWF Ag Plas IA | ||
Basic Attributes | |||
| class | COAG | ||
| type | 1 Laboratory | ||
| order vs. observation | Both | ||
| example UCUM units | {ratio} The Unified Code for Units of Measure (UCUM) is a code system intended to include all units of measures being contemporarily used in international science, engineering, and business (www.unitsofmeasure.org) | ||
| example unit | ratio | ||
Associated Observations | |||
LOINC codes that represent optional associated observation(s) for a clinical observation or laboratory test. A LOINC term may represent a single associated observation or panel containing several associated observations. | |||
History/Usage | |||
| first released | |||
| last updated | 2.68 | ||
| last change type | MIN - change to field other than name | ||
| change reason | Release 2.68: LONG_COMMON_NAME: Removed extra "Ag" | ||
Related Names | |||
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