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.
See also: Patch test (finite elements). A patch test is a method used to determine whether a specific substance causes allergic inflammation of a patient's skin. Any individual suspected of having allergic contact dermatitis or atopic dermatitis needs patch testing.Patch testing helps identify which substances may be causing a delayed-type allergic reaction in a patient, and may identify allergens not identified by blood testing or skin prick testing.atch testing helps identify which substances may be causing a delayed-type allergic reaction in a patient, and may identify allergens not identified by blood testing or skin prick testing.