Bleeding time is a medical test done on someone to assess their platelet function. A medical test is any kind of diagnostic procedure performed for health reasons. ... A 250 ml bag of newly collected platelets. ...

It involves cutting the underside of the subject's forearm, in an area where there is no hair or visible veins. The cut is of a standardised width and depth, and is done quickly by an automatic device. In geology, a vein is a finite volume within a rock, having a distinct shape, filled with mono or poly mineralic crystal aggregates, which were precipitated from an (aqueous) fluid or melt. ...

A blood pressure cuff is used above the wound, to maintain venous pressure at 40 mmHg.

The time it takes for bleeding to stop (as thus the time it takes for a platelet plug to form) is measured. Cessation of bleeding can be determined by blotting away the blood constantly until the site looks 'glassy'.

Bleeding time is affected by platelet function, and not by other coagulation factors so in haemophilia it is normal. The coagulation of blood is a complex process during which blood forms solid clots. ... Haemophilia or hemophilia is the name of any of several hereditary genetic illnesses that impair the bodys ability to control bleeding. ...

Aspirin and other anticoagulants, like coumadin and heparin, can prolong bleeding time significantly. Aspirin or acetylsalicylic acid is a drug in the family of salicylates, often used as an analgesic (against minor pains and aches), antipyretic (against fever), and anti-inflammatory. ...

Normal values fall between 2 - 8 minutes. A reference range is a set of values used by a health professional to interpret a set of medical test results. ...