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What is the Bleeding / Clotting Time Test?
Bleeding / Clotting Time Tests are used to identify any disorders related to blood hemostasis. Bleeding time is the measure of the time taken for the bleeding to stop as a function of the platelet aggregation to form a plug and constriction of blood vessels. Bleed time test helps identify any disorder associated with the functioning of the platelets.
Clotting time is the measure of the time taken in the formation of a clot after the bleeding has started. Clotting is the function of the enzyme thrombin, its precursor prothrombin, and clotting factors; hence, the clotting time test helps in the diagnosis of various disorders related to clotting factors or deficiency of vitamin K.
Book your appointment with Yashoda Hospital today to get the bleeding test done. You can opt for a free consultation with us as well.
Frequently Asked Questions:
What is the Bleeding / Clotting Time Test used for?
One of the major uses of the bleeding/clotting time tests includes identifying various disorders related to blood clotting, deficiency of vitamin K, issues with clotting factors, genetic coagulation disorders, delayed clotting time, prolonged bleeding, easy bleeding, etc. These tests are also recommended before undergoing surgeries to identify the risk of bleeding and the need for additional interventions.
Understanding the test results of the Bleeding / Clotting Time Test
The bleeding time normal range is approximately 2-7 minutes, and the clotting time normal range is 8-15 minutes. Abnormal bleeding test results could indicate platelet-related disorders, such as thrombocytopenia, genetic bleeding disorder, increased risk of haemorrhages, and epistaxis. Abnormal clotting time means clotting-related disorders, such as defects in coagulation pathways, genetic disorders, vitamin K deficiency, etc.
Why do I need a Bleeding / Clotting Time Test?
You may need bleeding / clotting time tests if you are experiencing issues with blood clot formation or are prone to easy bruising and bleeding. Clotting disorders can lead to prolonged bleeding, causing a significant loss of blood and further complications. People with thalassemia, platelet disorders, thrombocytopenia, or undergoing surgery also need to undergo these tests.
What happens during the Bleeding / Clotting Time Test?
During the test, small and shallow cuts are made on the lower arm while applying pressure on the upper arm via an arm cuff. After cuts are made, the cuff is removed. and the bleeding /clotting time is noted using a stopwatch. Blood is wiped using blotting paper every 30 seconds.
What test is used to assess clotting time for bleeding?
The following tests can be used to assess the clotting time for bleeding:
- Prothrombin time (PT) test
- Activated partial thromboplastin time (aPTT) test
- Platelet count for measuring thrombocytopenia or thrombocytosis
- Presence of coagulation factor V
- Fibrinogen level test
- Factor VIII test
- Complete blood count
How do I prepare for a bleeding time test?
Before the bleeding test, it is important to inform your doctor about the medications you are taking, especially if you are on aspirin or anticoagulants such as warfarin. You should also notify your doctor if you are taking any vitamins or herbal supplements. It is recommended to discontinue such medications and supplements within a few days in consultation with your doctor.
How long does it take for the blood to clot?
Usually, it takes around 8-15 minutes for the blood to clot. This clotting time can vary among people. Females take more time for blood clotting due to estrogen levels and reduced fibrinogen levels. Delayed clotting time can occur in various disorders, such as defects in clotting factors, genetic defects, etc.
What happens after a bleeding time test?
After the bleeding test, the site of the shallow cuts will heal completely in a few days. Usually, there is negligible risk of any infection or inflammation as the site is sterilized before making the cuts; however, in case of any potential infection, your doctor may prescribe anti-inflammatory medications or antibiotics.
Can a blood test detect a blood clot?
Yes, blood tests can be used to identify blood clotting disorders and also detect blood clots. D-dimer is a protein found in the blood associated with clot breakdown and high levels of D-dimer in blood suggest that you might have a big clot in your blood vessels, such as deep vein thrombosis.
What are the risks associated with a bleeding time test?
Usually, a bleeding time test is a safe test with minimal side effects. The area is sterilized before making the cuts; however, there is a risk of excessive bleeding or infection at the site of the cuts. Some amount of bleeding is normal as it is the requirement for the test.
References:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4925339/
https://www.webmd.com/a-to-z-guides/prothrombin-time-test
https://medlineplus.gov/lab-tests/prothrombin-time-test-and-inr-ptinr/
https://emedicine.medscape.com/article/2085022-overview
http://njppp.com/fulltext/28-1528542228.pdf
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