LOINC Code 78688-9: 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.adenosine diphosphate+prostaglandin E1 induced

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 adenosine diphosphate+prostaglandin E1 induced
• Platelet aggregation
• Quantitative in vitro determination of platelet function in whole blood triggered by the addition of adenosine diphosphate (ADP) and prostaglandin E1 (PGE1). ADP induces platelet aggregation by two pathways mediated by the platelet receptors P2Y1 and P2Y12, respectively. The addition of PGE1 inhibits the P2Y1 activation pathway, which enables more specific evaluation of substances, such as clopidogrel, that affect platelet aggregation through the P2Y12 pathway. This term was created for, but not limited in use to, the Cobas Prostaglandin E1 Reagent used in conjunction with the ADPtest. The combination of the two is also known as ADPtest High Sensitivity (HS) assay.
• ADP+PGE1 induced; Agg; Aggr; ANED; Arbitrary concentration; Blood; COAGULATION; Hematology; Heme; Medication stress; PA; Pl; Platelets; Platelt; Plt; Point in time; QNT; Quan; Quant; Quantitative; Random; 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