assay

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assay

1. 
a. an analysis, esp a determination of the amount of metal in an ore or the amounts of impurities in a precious metal
b. (as modifier): an assay office
2. a substance undergoing an analysis
3. a written report on the results of an analysis

assay

[′a‚sā]
(analytical chemistry)
Qualitative or quantitative determination of the components of a material, as an ore or a drug.
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References in periodicals archive ?
Using an Anti-Xa assay to monitor UFH has reduced blood transfusions by 4.
Innovative hemostasis assays improve quality and reduce cost of patient care
The American College of Chest Physicians approved use of the anti-Xa assay (Garcia, Baglin, Weitz, & Sanama, 2012).
Which lab test is best to monitor heparin therapy? What the evidence says
Evaluate the local utility and practicality of validating currently available methods to quantify the anticoagulant activity of DTI (dilute thrombin time or ecarin time calibrated with dabigatran) and DFXaI (chromogenic anti-Xa assay calibrated with rivaroxaban or apixaban).
Warfarin replacements: good for patients, challenging for laboratories
The anti-Xa assay is currently available for enoxaparin and nadroparin at the Charlotte Maxeke Johannesburg Hospital NHLS haematology laboratory ((011) 488-3068 or (011) 489-8534) as well as in private laboratories.
Venous thromboembolism: prophylactic and therapeutic practice guideline
LMWH levels cannot be monitored by the aPTT, but require a specialised anti-Xa assay, which is currently available at Johannesburg Hospital Haematology Laboratory (tel (011) 488-3068).
Heparin is a widely used drug--just about any health worker will deal with patients on the drug
Rivaroxaban has been shown to prolong the prothrombin time, (7,8) activated partial thromboplastin time, (9) and dilute Russell viper venom time (DRVVT) (10) in a concentration-dependent manner, but measuring drug activity by chromogenic anti-Xa assay may be preferred.
Comparison of Anti-Xa and Dilute Russell Viper Venom Time Assays in Quantifying Drug Levels in Patients on Therapeutic Doses of Rivaroxaban
INR responses vary widely depending on the thromboplastin assay reagent, but a calibrated anti-Xa assay appears to be a suitable method for determination of Riva concentration (13-16).
Laboratory assessment of novel oral anticoagulants: method suitability and variability between coagulation laboratories

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