American Medical Technologist (AMT) Practice Exam 2025 – All-in-One Resource to Guarantee Exam Success!

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Why is it necessary to wipe away the first drop of blood during a capillary procedure?

To obtain a larger sample size

To reduce interstitial fluid contamination

Wiping away the first drop of blood during a capillary procedure is done primarily to reduce interstitial fluid contamination. The first drop of blood that is released often includes not only blood but also interstitial fluid, which can dilute the blood sample and potentially affect the accuracy of laboratory tests. By discarding the first drop, healthcare providers ensure that the sample taken is predominantly blood, which is critical for obtaining reliable and valid results in tests, especially for glucose and other biochemical analyses.

Ensuring that interstitial fluid is minimized in the collected sample is essential, as excess fluid can introduce variables that compromise the integrity of the sample. This practice reinforces the importance of accurate testing in clinical settings, as even minor contamination can lead to misinterpretation of results and subsequent medical decisions.

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To prevent blood clotting

To ensure proper blood flow

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