This is an automatically translated article.
Blood time test in hematology helps to partially assess the body's ability to stop bleeding.
1. The role of the bleeding time test
Doctors often ask you to perform this bleeding time test when you need surgery or need to stop bleeding urgently in the event of an injury. The results of a coagulation test will accurately reflect whether your blood clotting is working properly or not.
In addition to the information of the clinical diagnosis along with the medical history of the patient and the patient's family, coagulation testing plays an extremely important role in detecting abnormal coagulation problems. .
According to the study, the main principle of the test is based on the main mechanisms in the stages of hemostasis, including: primary hemostasis, plasma coagulation, coagulation inhibition and fibrinolysis. Currently, in hospitals, blood clotting tests are almost all performed automatically by modern equipment, under the close supervision of doctors.
The performance of this test will contribute to helping doctors make faster, more accurate diagnoses about the degree and type of blood clotting disorder that the patient has. This will help speed up the treatment of the patient with the most appropriate treatment regimen.
Xét nghiệm thời gian chảy máu giúp xác định chính xác về mức độ và loại rối loạn đông máu
2. Who needs what tests?
Patients who are suffering from one of the following symptoms are often indicated for testing:
Before undergoing surgery, blood clotting tests will help accurately assess blood clotting, in order to avoid important complications during the intervention. The patient is taking anticoagulants. Some subjects did not take anticoagulants but showed signs of bleeding disorders, which can be manifested by symptoms such as bleeding gums, nosebleeds, and spots. unusual bruising, bleeding in stool or urine, even heavy menstrual bleeding, bleeding in joints, decreased vision.
3. Some testing methods
3.1. Duke method Test principle
Measure the time from creating a vascular wound in the center of the earlobe with a blood lancet until the wound stops bleeding.
Phương pháp Duke đo thời gian từ lúc tạo ra vết thương mạch máu ở vùng dái tai
Means, chemicals
Needle (Blood lancet) Stopwatch Blotting paper Absorbent cotton swab Disinfectant solution (Ete, alcohol 70o) Procedure for testing blood time according to Duke method
Use gentle rubbing alcohol earlobe area, then wait 1-2 minutes for the alcohol to evaporate. Use a needle to puncture the center of the earlobe firmly to create a 2mm long 2.5mm deep wound. Start the stopwatch. Every 30 seconds, blot the drop of blood from the sting with paper towels until the bleeding stops. Press the stopwatch. Read result
Normal bleeding time is less than 5 minutes. This value varies from laboratory to laboratory. When creating a sting, after 2 minutes of no bleeding, repeat the procedure in the opposite ear. If both ears do not bleed, then the bleeding time is concluded to be normal. If the contralateral ear is re-examined for prolonged bleeding, re-examine with the Ivy method. If bleeding time persists for more than 10 minutes, re-examine in the opposite ear or perform Ivy method. False cause
The sting size is not standard: too shallow or too deep. The act of absorbing the blood from the sting is too strong, causing the newly formed platelet plug to fall off. There is a vascular abnormality in the earlobe.
Kích thước vết chích không đạt tiêu chuẩn có thể khiến kết quả xét nghiệm bị sai lệch
Clinical significance
Diseases of the vascular wall such as vitamin C deficiency, allergic capillaritis, prolonged bleeding time is common and especially the deficiency in platelet quantity and quality (decreased hemorrhagic disease) platelets, Glanzmann's thrombocytopenia, etc.).
3.2. Ivy Method Principle
Under positive pressure, blood flows spontaneously through the wound wall until it forms a hemostatic plug.
Means of implementation
Blood pressure monitor. Needle, alcohol cotton or ether. Stopwatch (3 pieces). Procedure for testing blood flow time according to Ivy method
Using a sphygmomanometer, pump at a pressure of 40mmHg and keep it stable. Select an area on the front of the forearm without hair, without visible blood vessels, and disinfect with ether. Wait 1-2 minutes for the ethene to evaporate, making 3 equally sized stings about 2cm apart and about 3mm deep. Start the watch as soon as the wound is created. Every 30 seconds, using blotting paper, gently blot the bleeding from the wound similar to the Duke method. Record the bleeding time of each wound.
Phương pháp Ivy thực hiện xét nghiệm ở vùng mặt trước cẳng tay
Read results
Bleeding time in this case is the average time of all 3 wounds. However, there are also laboratories that record the bleeding time of each wound separately. Ivy bleeding time is usually less than 5 minutes.
The cause of the error
The cause of the error is the same in the Duke method. In addition, by poking a deep blood vessel, it will prolong the bleeding time. This case is detected if the bleeding time of the remaining 2 stains is within normal limits.
Periodic health check-ups help to detect diseases early, so that there are treatment plans for optimal results. Currently, Vinmec International General Hospital has general health checkup packages suitable for each age, gender and individual needs of customers with a reasonable price policy.
The patient's examination results will be returned to the home. After receiving the results of the general health examination, if you detect diseases that require intensive examination and treatment, you can use services from other specialties at the Hospital with quality treatment and services. outstanding customer service.
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