Question 48

Warming the heel prior to puncture is the best technique to avoid hemolysis of the specimen.

Warming the heel prior to puncture increases blood flow to the area, which can help minimize hemolysis during the collection of a capillary blood specimen.

A) Squeeze the heel with a generous amount of pressure

Squeezing the heel with excessive pressure can cause hemolysis by damaging red blood cells and forcing interstitial fluid into the blood sample, leading to inaccurate results. This technique is not recommended as it can compromise the integrity of the specimen.

B) Puncture after alcohol preparation while the heel is still wet

Puncturing the heel while it is still wet from alcohol can lead to hemolysis, as the alcohol can irritate the tissue and affect the blood sample. It is important to allow the alcohol to dry completely to prevent any potential interference with the sample quality.

C) Warm the heel prior to puncture

Warming the heel prior to puncture is an effective technique to promote better blood flow. This can help reduce the risk of hemolysis by ensuring that the blood specimen is collected more easily and with less trauma to the blood cells.

D) Scrape the blood off the heel immediately with a microtube

Scraping the blood off the heel can lead to hemolysis due to the mechanical disruption of blood cells. This method is not advisable as it can compromise the sample quality and result in erroneous test results.

Conclusion

Warming the heel prior to the puncture is essential for minimizing hemolysis, as it enhances blood flow and reduces the risk of damaging red blood cells during collection. All other options either increase the risk of hemolysis or compromise the quality of the blood specimen, reinforcing that warming is the superior technique in this scenario.