LOINC Code 78686-3: Platelet aggregation Qn (Bld)

What is this code?

LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Platelet aggregation. It is commonly used with the system or sample type Bld.

When is it used?

• Used in lab systems, EHRs, and clinical data exchange.
• May identify a test, observation, survey item, or clinical document request rather than a diagnosis.
• Status: ACTIVE
• Order vs observation: Both
• Method: Aggregometry.ristocetin induced.high dose

What it does not mean

• The code identifies the observation or test, not the actual result.

Key facts

• Platelet aggregation [Units/volume] in Blood by ristocetin induced High dose
• Platelet aggregation
• Assay for the quantitative in vitro determination of platelet function triggered by a high concentration of ristocetin. In the presence of ristocetin, platelets bind to von Willebrand Factor (VWF) by means of glycoprotein Ib (GPIb) receptors and triggers platelet activation and aggregation. This term was created for, but not limited in use to, the Cobas RISTOtest, a quantitative in vitro assay using a high concentration of ristocetin (0.77 mg/mL) to stimulate strong platelet aggregation in whole blood samples by impedance aggregometry.
• Agg; Aggr; Arbitrary concentration; Blood; COAGULATION; Hematology; Heme; PA; Pl; Platelets; Platelt; Plt; Point in time; QNT; Quan; Quant; Quantitative; Random; Rist hi dose; Thrombocyte; Thrombocytes; WB; Whole blood

Where you may see this code

You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges.

Common synonyms

Frequently asked questions