What is the proper technique for collecting a blood sample?

The proper technique for collecting a blood sample is to first clean the site, then apply the tourniquet, followed by inserting the needle, and finally collecting the sample. This sequence is essential for several reasons.

First, cleaning the site with an antiseptic helps to reduce the risk of infection by removing any contaminants or microorganisms on the skin’s surface. This is critical to ensure that the blood sample is not contaminated, which could lead to inaccurate test results.

Applying the tourniquet after cleaning the site helps to engorge the veins with blood, making them more prominent and easier to access. It is important to apply the tourniquet after the antiseptic has dried to avoid any chemical interference from the cleaning solution entering the blood sample.

Next, inserting the needle into the vein should be conducted with care and precision to minimize discomfort for the patient and ensure that the needle is correctly positioned to collect the blood efficiently. Following this, the blood sample is collected, completing the venipuncture procedure.

This systematic approach helps maintain sterility, ensures the accuracy of the test results, and minimizes discomfort for the patient.