Platelets (also called thrombocytes) are small blood cell fragments made by your bone marrow. They help form blood clots to stop you from bleeding when you've been injured. Platelets are small cell ...

What Is the Platelet Aggregation Test? A platelet aggregation test is a blood test that looks at how well your blood cells called platelets clump together and clot. It is sometimes called a platelet ...

A platelet aggregation test checks how well your platelets clump together to form blood clots. Platelets are a type of blood cell. They help form blood clots by sticking together. A clot is what stops ...