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Clinical Chemistry 47: 794-795, 2001;
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(Clinical Chemistry. 2001;47:794-795.)
© 2001 American Association for Clinical Chemistry, Inc.

Letters

Effects of Blood-Collection Systems and Tubes on Hematologic, Chemical, and Coagulation Tests and on Plasma Hemoglobin

Miriam Almagora and Ofri Lavid-Levy

Division of Clinical Laboratories, Bikur Cholim Hospital, 5 Strauss Street, Jerusalem 91004, Israel
a Author for correspondence. Fax 972-2-6464289; e-mail almagors@hotmail.com.


To the Editor:

Numerous preanalytical variables may affect the outcome of clinical laboratory tests (1)(2)(3). Blood-collection procedures are considered an important impact factor because they are associated with several possible sampling problems, including the use of a tourniquet with hand-clenching, the site of venipuncture, hemolysis because of venipuncture, and the inappropriate use of sample tubes.

In our hospital, two systems are used for venous blood collection: the Becton Dickinson (BD) VacutainerTM system and the Greiner Vacuette® system (Greiner Labortechnik GmbH). The BD product includes a specific blood-collection needle, a holder into which the needle is assembled before phlebotomy, and evacuated blood collection tubes. The Greiner product consists of a sterile holder (Holdex®) with a luer adapter to fit regular needles and evacuated blood collection tubes. The design of the BD needle holder enables direct linear flow of blood from the venipuncture site into the blood collection tubes. The Greiner Holdex was designed with an offset luer adapter to enable a convenient puncture angle. Therefore, the straight path within the Holdex is interrupted twice by angles of 90°, thus forming three consecutive flow segments. These changes in the linear flow of blood might . . . [Full Text of this Article]


References




The following articles in journals at HighWire Press have cited this article:


Home page
 Clin. Chem.Home page
G. Lippi and G. C. Guidi
Effect of Specimen Collection on Routine Coagulation Assays and D-Dimer Measurement
Clin. Chem., November 1, 2004; 50(11): 2150 - 2152.
[Full Text] [PDF]


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