American Medical Certification Association (AMCA) Phlebotomy Practice Exam 2025 - Free Phlebotomy Practice Questions and Study Guide

Question: 1 / 400

Why should anticoagulant tubes be filled to the indicated line?

To reduce air exposure

To maintain the correct blood-to-anticoagulant ratio

Filling anticoagulant tubes to the indicated line is crucial in maintaining the correct blood-to-anticoagulant ratio. Each type of anticoagulant tube contains a specific volume of anticoagulant that is designed to effectively prevent blood coagulation when mixed with a corresponding volume of blood. If the tube is underfilled or overfilled, the balance between the blood and the anticoagulant will be disrupted. This imbalance can lead to inaccurate test results, as the effectiveness of the anticoagulant may be compromised, resulting in either inadequate prevention of clotting or excessive dilution of the sample.

Maintaining the proper blood-to-anticoagulant ratio ensures that laboratory tests conducted on the blood sample yield reliable and accurate outcomes, which is essential for diagnosing and monitoring medical conditions.

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To ensure proper labeling

To control the temperature

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