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California introduced phlebotomy licensure after an on-the-job trained phlebotomist at a Palo Alto phlebotomy draw station for SmithKline Beecham Clinical Laboratory (SBCL) was found to be re-using needles, sometimes after washing them with diluted hydrogen peroxide, in an effort to save supplies and run a cost-efficient lab.
The practice has now been abandoned by modern-style medicine for all except a few very specific medical conditions. [3] In the beginning of the 19th century, studies had begun to show the harmful effects of bloodletting. [4] Today, the term phlebotomy refers to the drawing of blood for laboratory analysis or blood transfusion. [5]
Phlebotomy is the process of making a puncture in a vein, usually in the arm, with a cannula for the purpose of drawing blood. [1] The procedure itself is known as a venipuncture , which is also used for intravenous therapy .
The test tubes in which blood is collected may contain one or more of several additives. In general, tests requiring whole blood call for blood samples collected in test tubes containing some form of the anticoagulant EDTA. EDTA chelates calcium to prevent clotting. EDTA is preferred for hematology tests because it does minimum damage to cell ...
While much information can be gleaned by testing the blood itself (drawn from a vein by phlebotomy), it is sometimes necessary to examine the source of the blood cells in the bone marrow to obtain more information on hematopoiesis; this is the role of bone marrow aspiration and biopsy.
Venography (also called phlebography or ascending phlebography) is a procedure in which an X-ray of the veins, a venogram, is taken after a special dye is injected into the bone marrow or veins.