Editing Bleeding time (section)

===IVY method===

The IVY method is the traditional format for this test. While both the IVY and Duke's method require the use of a [[sphygmomanometer]], or blood pressure cuff, the IVY method is more invasive than the Duke method, utilizing an [[Incision and drainage|incision]] on the ventral side of the forearm, whereas the Duke method involves puncture with a [[Blood lancet|lancet]] or special needle.  In the IVY method, the blood pressure cuff is placed on the upper arm and inflated to 40 mmHg. A lancet or scalpel blade is used to make a shallow incision that is 1 millimeter deep on the underside of the forearm.<ref name="o137">{{cite journal | last1=Burns | first1=E. R. | last2=Lawrence | first2=C. | title=Bleeding time. A guide to its diagnostic and clinical utility | journal=Archives of Pathology & Laboratory Medicine | volume=113 | issue=11 | date=1989 | issn=0003-9985 | pmid=2535679 | pages=1219–1224}}</ref>

A standard-sized incision is made around 10&nbsp;mm long and 1&nbsp;mm deep. The time from when the incision is made until all bleeding has stopped is measured and is called the bleeding time. Every 30 seconds, filter paper or a paper towel is used to draw off the blood.

The test is finished when bleeding has stopped.<ref name="urlBlood Chemistries">{{cite web|url=http://www.obgyn.ufl.edu/obgyn101/Lab/Blood%20Chemistries.htm |title=Blood Chemistries |access-date=2009-01-02 |url-status=dead |archive-url=https://web.archive.org/web/20070814013421/http://www.obgyn.ufl.edu/obgyn101/Lab/Blood%20Chemistries.htm#Liver%20Function%20Tests |archive-date=August 14, 2007 }}</ref>

A prolonged bleeding time may be a result from decreased number of thrombocytes or impaired blood vessels. However, the depth of the puncture or incision may be the source of error.

[[Reference ranges for common blood tests|Normal values]] fall between 3&nbsp;– 10 minutes depending on the method used.

A disadvantage of Ivy's method is closure of puncture wound before stoppage of bleeding.<ref name=":0">{{Cite journal|url=https://www.bioscience.com.pk/topics/microbiology/item/151-bleeding-time-and-clotting-time|title=BLEEDING TIME (BT) AND CLOTTING TIME (CT)|last=Dg|first=Dayyal|year=2016|journal=BioScience|issn=2521-5760}}</ref>