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Related to phlebotomies: hemochromatosis




Phlebotomy is the act of drawing or removing blood from the circulatory system through a cut (incision) or puncture in order to obtain a sample for analysis and diagnosis. Phlebotomy is also done as part of the patient's treatment for certain blood disorders.



Phlebotomy that is part of treatment (therapeutic phlebotomy) is performed to treat polycythemia vera, a condition that causes an elevated red blood cell volume (hematocrit). Phlebotomy is also prescribed for patients with disorders that increase the amount of iron in their blood to dangerous levels, such as hemochromatosis, hepatitis B, and hepatitis C. Patients with pulmonary edema may undergo phlebotomy procedures to decrease their total blood volume.


Phlebotomy is also used to remove blood from the body during blood donation and for analysis of the substances contained within it.


Patients who are anemic or have a history of cardiovascular disease may not be good candidates for phlebotomy.


Phlebotomy, which is also known as venesection, is performed by a nurse or a technician known as a phlebotomist. Blood is usually taken from a vein on the back of the hand or inside of the elbow. Some blood tests, however, may require blood from an artery. The skin over the area is wiped with an antiseptic, and an elastic band is tied around the arm. The band acts as a tourniquet, slowing the blood flow in the arm and making the veins more visible. The patient is asked to make a fist, and the technician feels the veins in order to select an appropriate one. When a vein is selected, the technician inserts a needle into the vein and releases the elastic band. The appropriate amount of blood is drawn and the needle is withdrawn from the vein. The patient's pulse and blood pressure may be monitored during the procedure.
For some tests requiring very small amounts of blood for analysis, the technician uses a finger stick. A lance, or small needle, makes a small cut in the surface of the fingertip, and a small amount of blood is collected in a narrow glass tube. The fingertip may be squeezed to get additional blood to surface.
The amount of blood drawn depends on the purpose of the phlebotomy. Blood donors usually contribute a unit of blood (500 mL) in a session. The volume of blood needed for laboratory analysis varies widely with the type of test being conducted. Therapeutic phlebotomy removes a larger amount of blood than donation and blood analysis require. Phlebotomy for treatment of hemochromatosis typically involves removing a unit of blood-or 250 mg of iron-once a week. Phlebotomy sessions are required until iron levels return to a consistently normal level, which may take several months to several years. Phlebotomy for polycythemia vera removes enough blood to keep the patient's hematocrit below 45%. The frequency and duration of sessions depends on the patient's individual needs.


Patients having their blood drawn for analysis may be asked to discontinue medications or to avoid food (to fast) for a period of time before the blood test. Patients donating blood will be asked for a brief medical history, have their blood pressure taken, and have their hematocrit checked with a finger stick test prior to donation.


After blood is drawn and the needle is removed, pressure is placed on the puncture site with a cotton ball to stop bleeding, and a bandage is applied. It is not uncommon for a patient to feel dizzy or nauseated during or after phlebotomy. The patient may be encouraged to rest for a short period once the procedure is completed. Patients are also instructed to drink plenty of fluids and eat regularly over the next 24 hours to replace lost blood volume. Patients who experience swelling of the puncture site or continued bleeding after phlebotomy should get medical help at once.


Most patients will have a small bruise or mild soreness at the puncture site for several days. Therapeutic phlebotomy may cause thrombocytosis and chronic iron deficiency (anemia) in some patients. As with any invasive procedure, infection is also a risk. This risk can be minimized by the use of prepackaged sterilized equipment and careful attention to proper technique.

Normal results

Normal results include obtaining the needed amount of blood with the minimum of discomfort to the patient.



Wolfe, Yun Lee. "Case of the Ceaseless Fatigue." Prevention Magazine July 1997: 88-94.

Key terms

Finger stick — A technique for collecting a very small amount of blood from the fingertip area.
Hemochromatosis — A genetic disorder known as iron overload disease. Untreated hemochromatosis may cause osteoporosis, arthritis, cirrhosis, heart disease, or diabetes.
Thrombocytosis — A vascular condition characterized by high blood platelet counts.
Tourniquet — Any device that is used to compress a blood vessel to stop bleeding or as part of collecting a blood sample. Phlebotomists usually use an elastic band as a tourniquet.
Venesection — Another name for phlebotomy.
Gale Encyclopedia of Medicine. Copyright 2008 The Gale Group, Inc. All rights reserved.


incision of a vein for the removal or withdrawal of blood; called also venesection and venotomy.
arterial blood sample phlebotomy in the nursing interventions classification, a nursing intervention defined as obtaining a blood sample from an uncannulated artery to assess oxygen and carbon dioxide levels and acid-base balance.
phlebotomy: blood unit acquisition in the nursing interventions classification, a nursing intervention defined as procuring blood and blood products from donors.
phlebotomy: venous blood sample in the nursing interventions classification, a nursing intervention defined as removal of a sample of venous blood from an uncannulated vein.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.


Incision into or needle puncture of a vein for the purpose of drawing blood.
Synonym(s): venesection, venotomy
[phlebo- + G. tomē, incision]
Farlex Partner Medical Dictionary © Farlex 2012


n. pl. phleboto·mies
1. The removal of blood from a vein, usually with a needle and syringe or other container, for diagnostic or therapeutic purposes, as in the treatment of hemochomatosis.
2. The removal of blood from a vein with a cutting instrument, formerly done to reduce blood volume as a treatment of disease. In both senses also called venesection.

phleb′o·tom′ic (flĕb′ə-tŏm′ĭk), phleb′o·tom′i·cal (-ĭ-kəl) adj.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.


Venesection Lab medicine
1. The obtention by venipuncture of blood for a diagnosis.
2. The surgical opening of a vein to withdraw blood–eg, to ↓ blood volume, as in hemochromatosis. See Pharmacologic phlebotomy, Therapeutic phlebotomy. Cf Venipuncture.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.


Incision into a vein for the purpose of drawing blood.
Synonym(s): venesection, venotomy.
[phlebo- + G. tomē, incision]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012


(fle-bot'o-me) [ phlebo- + -tomy]
Enlarge picture
The puncturing of a vein or the surgical opening of a vein to withdraw blood. Synonym: blood draw See: illustration

bloodless phlebotomy

Medical Dictionary, © 2009 Farlex and Partners


Cutting into, or puncture of, a vein, usually for the purpose of removing blood.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005
References in periodicals archive ?
Overall, rejected specimens accounted for 0.3% of all outpatient phlebotomies. No ordering, patient preparation, or specimen collection practices were associated with rejection rates (Table 1).
(3) Most unsuccessful inpatient phlebotomies were unsuccessful because the patient was unavailable for collection.
In HH subjects, blood cadmium was highly related to the number of years of treatment by phlebotomy (Figure 2), the total amount of blood removed by phlebotomy, and the total number of phlebotomies. When we controlled for covariance through a stepwise multiple regression analysis, only years of treatment (adjusted [r.sup.2] = 0.48) and age, but not the amount of blood loss or the number of phlebotomies, were significantly correlated to blood cadmium.
(25) found no difference in blood lead between phlebotomized and nonphlebotomized subjects, and no correlation between blood lead and the number of phlebotomies. However, they did not investigate an association between blood lead and the number of years of treatment, which was the only association with lead in the present study.
Evaluation of three safety devices(*) used in phlebotomies based on surveillance and surveys of health-care workers (HCWs)([dagger]), by characteristic -- Minneapolis-St.
phlebotomies performed Conventional device 2,540,500 Safety device 1,875,995 Estimated no.
Time your personnel in the performance of phlebotomies according to your chosen parameters.
While not explicitly condoning the nonuse of gloves, one carefully worded passage of the CDC update says: "Institutions that judge that routine gloving for all phlebotomies is not necessary should periodically reevaluate their policy.