Used to dx qualitative platelet function

  1. Put on a BP cuff and inflate to about 40mm Hg
  2. Make a small incision
  3. Blot q30sec
  4. Measure time of bleeding; nl = 5-9min

"Aspirin stress test" use if strongly suspect qualitative platelet defect and bleeding time is nl (can unmask a qualitative platelet deficiency; give pt ASA; shouldn't prolong bleeding time to > 10min)