Longer-than-normal bleeding time may be due to: Blood vessel defect. Platelet aggregation defect (clumping problem with platelets, which are parts of the blood that helps the blood clot) Thrombocytopenia (low platelet count)
Definition. An abnormal prolongation (delay) in the time required by whole blood to produce a visible clot. [
Hemophilia is a rare disorder in which the blood doesn't clot in the typical way because it doesn't have enough blood-clotting proteins (clotting factors). If you have hemophilia, you might bleed for a longer time after an injury than you would if your blood clotted properly.
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.
When performed with standardized methods and techniques, the bleeding time (BT) depends on variables that physiologically alter primary hemostasis. These variables include number of platelets and platelet function, white and red blood cell counts, vascular factors, hormones, and temperature.
Thrombocytopenia occurs when your bone marrow doesn't make enough platelets. Platelets are blood cells that form blood clots to help stop bleeding. People with this condition may bleed a lot and the bleeding may be hard to stop.
How fast your blood clots depends on the amount of clotting factors in your blood and whether they're working correctly. If your blood clots too slowly, you may bleed too much after an injury. If your blood clots too fast, dangerous clots may form in your arteries or veins.
These three types of bleeding, or hemorrhaging, differ not only in location but also in how they flow and their severity. Specifically, arterial bleeding comes out in spurts, venous bleeding flows steadily, and capillary bleeding trickles from the body. Bleeding from the arteries and veins can be severe.
The time from the beginning of incision until the termination of bleeding is considered as the BT. A standard filter paper should be used every 30 seconds to draw off it until the blood completely stops. The normal BT values run in the range of 2-9 minutes.
Bleeding manifestations in the most common type I von Willebrand disease (VWD) include bruising, mucosal bleeding, bleeding from small skin cuts that may stop and start over hours, increased menstrual bleeding, and sometimes bleeding after surgical procedures (eg, tooth extraction, tonsillectomy).
Von Willebrand disease (VWD), the most common inherited bleeding disorder, which has different types that are numbered based on how common the condition is and how severe the symptoms are.
Capillary bleeding is the least dangerous type of bleeding when compared to arterial and venous bleeding. It occurs when an individual faces an injury to their skin, and this kind of bleeding is much easier to control.
Coagulations disorders are conditions that affect the blood's clotting activities. Hemophilia, Von Willebrand disease, clotting factor deficiencies, hypercoagulable states and deep venous thrombosis are all coagulations disorders. Hemophilia and Von Willebrand disease are among the best known.
A lack of clot formation can result in dangerous and excessive bleeding. Blood clots are the main way the body protects against blood loss from injured vessels. Two blood elements, platelets and fibrin, are the primary ingredients in blood clots.
Certain cancers such as leukemia or lymphoma can lower your platelet count. The abnormal cells in these cancers can crowd out healthy cells in the bone marrow, where platelets are made. Less common causes of a low platelet count include: Cancer that spreads to the bone.
Some bleeding disorders, such as hemophilia, can be inherited or acquired. Others can occur from such conditions as anemia, cirrhosis of the liver, HIV, leukemia, and vitamin K deficiency. They also can result from certain medications that thin the blood, including aspirin, heparin, and warfarin.
Bleeding disorders are a group of conditions in which there is a problem with the body's blood clotting process. These disorders can lead to heavy and prolonged bleeding after an injury or surgery. Bleeding can also begin on its own and may be difficult to stop.
To find out if a person has von Willebrand disease (VWD), the doctor will ask questions about personal and family histories of bleeding. The doctor also will check for unusual bruising or other signs of recent bleeding and order some blood tests that will measure how the blood clots.