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The Human Phenotype Ontology (HPO) is downloaded weekly from The file downloaded is considered the "last stable build" available for the ontology. For more about the HPO, view their website at

Term:Prolonged bleeding time
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Accession:HP:0003010 term browser browse the term
Definition:Prolongation of the time taken for a standardized skin cut of fixed depth and length to stop bleeding.
Comment:The bleeding time test measures the time taken for blood vessel constriction and platelet plug formation to occur. No clot is allowed to form, so that the arrest of bleeding depends exclusively on blood vessel constriction and platelet action. To perform the test, pressure is maintained throughout the test by inflating a sphygmomanometer cuff on the upper arm. The dorsal surface of the forearm is then cleaned, and the bleeding time device placed onto the skin and the trigger is depressed. At 30-second intervals, the flow of blood is blotted with filter paper. The time from puncture to cessation of bleeding is then recorded as the bleeding time. Normal values depend on the device used and other parameters, but are around 2 to 9 minutes.
Synonyms:exact_synonym: Increased bleeding time
 alt_id: HP:0008294;   HP:0008337
 xref: UMLS:C0151529

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  Human phenotype 0
    Phenotypic abnormality 0
      Abnormality of blood and blood-forming tissues 0
        Abnormal bleeding 0
          Prolonged bleeding time 0
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