Quoted from the NIH: Normally, the immune system helps protect the body, but with Crohn's disease the immune system can't tell the difference between normal body tissue and foreign substances. The result is an overactive immune response that leads to chronic inflammation. This is called an autoimmune disorder..
Platelet Aggregation Test. A platelet aggregation test checks how well your platelets clump together. Platelets are types of blood cells. They help form blood clots by sticking together. A clot stops the bleeding when you have a wound. A platelet aggregation test requires a blood sample.The sample will be examined to see how the platelets are distributed through the plasma. Plasma is the liquid part of the blood. The lab technician will also add certain chemicals to your blood sample to test how quickly your platelets form a clot.latelets are types of blood cells. They help form blood clots by sticking together. A clot stops the bleeding when you have a wound. A platelet aggregation test requires a blood sample. The sample will be examined to see how the platelets are distributed through the plasma.
Note: testing is labor intensive and must be scheduled in advance because a normal control must be drawn simultaneously. A platelet function assay (e.g. PFA-100) may be used to assess platelet function; although easier to perform, it is not as robust as platelet aggregation and must be interpreted with caution.