Question 41

A phlebotomist should remove the tourniquet after 30 seconds of blood flow into the syringe.

Removing the tourniquet after 30 seconds of blood flow into the syringe is critical to prevent hemoconcentration and ensure optimal sample quality.

A) As soon as blood starts flowing into the syringe

This option is incorrect because removing the tourniquet immediately as blood starts to flow can lead to potential complications such as hemolysis or inaccurate results. It is important to allow for a brief period of blood flow to ensure a proper sample.

B) After 2 min of blood flow into the syringe

This choice is incorrect as it suggests a much longer duration for keeping the tourniquet on, which can increase the risk of hemoconcentration and negatively impact the quality of the blood sample.

C) After the last sample is collected

This option is also incorrect because it implies that the tourniquet should remain in place until all samples are drawn, which can lead to complications and affect the results of the samples collected.

D) After 30 seconds of blood flow into the syringe

This is the correct option as it aligns with best practices for venipuncture, allowing enough time for adequate blood collection while minimizing the risk of hemoconcentration.

Conclusion

The correct answer, removing the tourniquet after 30 seconds of blood flow, is essential for maintaining sample integrity and preventing complications. Other options either suggest inadequate timing or prolong the use of the tourniquet, which can compromise the quality of the blood sample. Thus, adhering to the 30-second guideline is crucial for effective venipuncture.