The NCCLS has recommended that a red-topped "waste" tube be drawn before a light blue-topped Vacutainer tube, because thromboplastin released from cells during the venipuncture can interfere with coagulation tests.
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Q73: Describe the postexposure management of a needle
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Q76: It is important to shake a Vacutainer
Q77: The smaller the gauge of the venipuncture
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Q80: Under OSHA guidelines, needle holders for Vacutainers
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