What should be done immediately after collecting a blood sample to avoid contamination?

The immediate action of ensuring proper labeling after collecting a blood sample is crucial in preventing contamination and ensuring the integrity of the sample. Proper labeling includes recording the patient's information, the date and time of collection, and any other relevant identifiers. This step not only helps in avoiding mix-ups between samples but also minimizes the risk of contamination that can occur if the sample is not clearly identified. Clear labeling ensures that the sample can be traced back to the correct patient, ultimately maintaining the reliability of test results.

Handling the sample with care, such as avoiding vigorous mixing or unnecessary temperature changes, is also important for preserving sample integrity, which is why proper labeling is prioritized first, as it lays the groundwork for all subsequent actions regarding the sample.