Under physiological conditions, the function of adhering to platelet granules or lumps between platelets and platelets is called platelet aggregation. The method for measuring platelet aggregation function is called platelet aggregation test (PAgT), which is commonly used for turbidimetry.

Basic Information

Specialist classification: cardiovascular examination classification: blood examination

Applicable gender: whether men and women apply fasting: fasting

Tips: Do not eat too greasy, high-protein foods the day before the blood draw, avoid heavy drinking. The alcohol content in the blood directly affects the test results. Normal value

1.0 μmol.

Note: The maximum aggregation rate of ADP is 62.7±16.1%, and the aggregation curve varies depending on the method and the inducer.

Clinical significance

The platelet aggregation test mainly reflects the aggregation function of platelets.

The results were found in diabetes, acute myocardial infarction, venous thrombosis, high beta lipoproteinemia, antigen-antibody complex response, prosthetic valves, oral contraceptives, high-fat diets, and smoking.

The results were reduced in platelet weakness, giant platelet syndrome, storage pool disease, May-Heegglin abnormality, low (no) fibrinogenemia, cirrhosis, uremia, infective endocarditis, taking antiplatelet drugs, and the like.

Low results may be diseases: pediatric platelet release dysfunction, high incidence of platelet weakness in children may be diseases: pediatric hemorrhagic shock and encephalopathy syndrome, hemorrhagic shock and encephalopathy syndrome, simple purpura matters needing attention

First, the precautions before blood draw

1, do not eat too greasy, high-protein food the day before the blood, to avoid heavy drinking. The alcohol content in the blood directly affects the test results.

2. After 8 pm on the day before the medical examination, you should start fasting for 12 hours to avoid affecting the test results.

3, should relax when taking blood, to avoid the contraction of blood vessels caused by fear, increase the difficulty of blood collection.

Second, should pay attention after blood draw

1. After blood is drawn, local compression is required at the pinhole for 3-5 minutes to stop bleeding. Note: Do not rub, so as not to cause subcutaneous hematoma.

2, the pressing time should be sufficient. There is a difference in clotting time for each person, and some people need a little longer to clotting. Therefore, when the surface of the skin appears to be bleeding, the compression is stopped immediately, and the blood may be infiltrated into the skin due to incomplete hemostasis. Therefore, the compression time is longer to completely stop bleeding. If there is a tendency to bleed, the compression time should be extended.

3, after the blood draw symptoms of fainting such as: dizziness, vertigo, fatigue, etc. should immediately lie down, drink a small amount of syrup, and then undergo a physical examination after the symptoms are relieved.

4. If there is localized congestion, use a warm towel after 24 hours to promote absorption.

3. Please inform the doctor about the recent medication and special physiological changes before the test.

Inspection process

blood test.

Not suitable for the crowd

Inappropriate people: Generally there are no people who are not suitable.

Adverse reactions and risks

1, local subcutaneous hemorrhage: after the blood collection should be pressed for a sufficient time, especially those with bleeding tendency, so as not to cause subcutaneous oozing and bruising due to no blood coagulation.

2, infection: attention to aseptic operation during venous blood collection, so as not to cause local infection.