Scribd
Upload
17 views11 pages

Bleeding Time

The bleeding time test measures how fast small blood vessels in the skin stop bleeding by evaluating how quickly vessels constrict and platelets seal cut holes. It is done to evaluate vascular and platelet factors and detect coagulation disorders, with normal values being 2-7 minutes and prolonged times indicating issues.

Uploaded by

Ahmed
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
17 views11 pages

Bleeding Time

The bleeding time test measures how fast small blood vessels in the skin stop bleeding by evaluating how quickly vessels constrict and platelets seal cut holes. It is done to evaluate vascular and platelet factors and detect coagulation disorders, with normal values being 2-7 minutes and prolonged times indicating issues.

Uploaded by

Ahmed
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
You are on page 1/ 11

Bleeding Time

Assist Lecture Ammar Yasir


Bleeding time
⚫ Bleeding time is a medical test that measures how fast
small blood vessels in the skin stop bleeding.

⚫ The bleeding time test evaluates how well a person's blood


is clotting. The test evaluates how long the vessels cut to
constrict and how long it takes for platelets in the blood to
seal off the hole.
Normal Values of Bleeding Time
(BT)
⚫ Bleeding time normal: 2 to 7 minutes
⚫ Borderline: 7 to 11 minutes.
⚫ Abnormal value: 10 to 15 minutes.
Indications For Bleeding Time (BT)
⚫ This test is done to evaluate vascular and platelet factors.

⚫ This test may be done Preoperatively to rule out the possibility of


bleeding, e.g., in patients for tonsillectomy, etc.

⚫ A bleeding test may be done to detect the presence of various


coagulation disorders.

⚫ This may be advised to monitor the treatment of active hemorrhage in


patients with prolonged bleeding time due to uremia, von Willebrand
disease, severe anemia, and congenital platelets functional
abnormalities.
Aim
⚫ To calculate the time required to stop bleeding in the skin
resulting from a small blood vessel wound.
Principle
⚫ The time from the beginning of incision until the
termination of bleeding is considered as the BT.
Materials
⚫ Sterilizing Alcohol
⚫ Cotton
⚫ Lancet
⚫ Filter Paper
⚫ Stopwatch.
Procedure
⚫ A standard filter paper should be used every 30 seconds to
draw off it until the blood completely stops.
Result
⚫ Then calculate the spots of blood and collect them to find
the total bleeding time.
Diseases that cause prolonged
bleeding time
⚫ 1. Thrombocytopenia.
⚫ 2. Disseminated intravascular coagulation (DIC).
⚫ 3. Bernard-Soulier disease.
⚫ 4. Glanzmann's thrombasthenia.
⚫ 5. Aspirin and other cyclooxygenase inhibitors can significantly
prolong bleeding time.
Thank You

You might also like