Platelet Function and Aggregation Profile with Multiple Analyte Testing (Pooled Sample)

What This Test Measures

The test evaluates several platelet-related components, including: - Platelet aggregation responses to different stimuli (e.g., collagen, ADP, arachidonic acid). - Platelet activation markers that indicate whether platelets are already engaged in clotting. - Flow cytometry data to assess platelet size, distribution, and functional capacity. These measures are often combined into a pooled analysis for a comprehensive view.

Why It’s Done

This test may be recommended if you have symptoms like easy bruising, prolonged bleeding, unexplained nosebleeds, or if you’re undergoing treatments that affect blood clotting (e.g., certain medications or chemotherapy). It can also help monitor conditions like von Willebrand disease, thrombocytopenia, or platelet dysfunction.

Sample Collection and Preparation

A small amount of whole blood is drawn into a special tube. The blood is then processed to separate platelet-rich components, which are analyzed together in a pooled sample. This avoids individual variability and provides a broader assessment of platelet function.

What to Expect Before the Test

No special preparation is needed, but inform your healthcare provider about any medications (especially blood thinners) or recent injuries. Avoid vigorous exercise or aspirin-containing products for 48 hours before testing, as they can affect platelet function.