AMCA Phlebotomy Practice Exam 2025 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 400

How long should a tourniquet not be left on during venipuncture?

30 seconds

The correct response is based on the standard practice guidelines for venipuncture. A tourniquet should ideally not be left on for more than one minute. If a tourniquet is applied for an extended period, it can lead to several complications, including hemoconcentration, which skews laboratory results by increasing the concentration of cellular components in the blood serum. This can affect the accuracy of certain tests and might necessitate a repeat venipuncture.

In clinical practice, one minute is generally considered the maximum time frame for which a tourniquet can safely remain applied before significantly impacting the blood composition and laboratory outcomes. This time limitation helps ensure that the specimen obtained for testing is as accurate and reliable as possible.

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