Difficulty: Medium

Average Score: 74%

When a phlebotomist performs a heel stick for the purposes of obtaining a PKU test, it is important to

Rationale

wipe away the first drop of blood.

Wiping away the first drop of blood is crucial during a heel stick for a PKU test to ensure that the sample is not contaminated with interstitial fluid, which can affect the accuracy of the test results. This step helps in obtaining a pure blood sample that reflects the true metabolic state of the infant.

A (wrap the site with a heel warmer for 30 min.) YOUR ANSWER

While warming the heel can help increase blood flow and make the procedure easier, it is not a required step for obtaining a PKU test. The primary focus should be on ensuring the integrity of the blood sample, which is achieved by wiping away the first drop of blood.

C (keep a pressure dressing on the site for the day.) YOUR ANSWER

A pressure dressing is not necessary after a heel stick for a PKU test. Typically, the heel should be left open to air after the procedure to promote healing and prevent any unnecessary pressure, which could lead to discomfort or complications.

D (target the central arch area of the foot for the least amount of discomfort.) YOUR ANSWER

The central arch area is not the recommended site for a heel stick. The lateral aspect of the heel is the preferred location to minimize discomfort and avoid damaging any nerves or blood vessels. Proper site selection is important, but it does not take precedence over the need to wipe away the first drop of blood.

Conclusion

In performing a heel stick for a PKU test, the most critical step is to wipe away the first drop of blood to ensure a clean sample, free from contamination. While other considerations such as site selection and warming may enhance the procedure, they do not replace the necessity of obtaining an uncontaminated blood sample, which is vital for accurate testing results.

Related Questions

View all