A phlebotomist is drawing a capillary blood specimen on a 2monthold infant Which of the following techniques should the phlebotomist use to avoid hemolysis of the specimen
Warm the heel prior to puncture.
Warming the heel before puncture increases blood flow to the area, which helps to minimize hemolysis by ensuring a smoother blood draw and reducing the likelihood of damaging red blood cells during collection.
Applying excessive pressure when squeezing the heel can cause trauma to the blood cells, leading to hemolysis. This technique can also force interstitial fluid into the blood sample, diluting it and affecting test results negatively.
If the heel is punctured while still wet with alcohol, the residual alcohol can contaminate the blood sample and potentially lead to hemolysis. Proper technique requires allowing the alcohol to dry completely before puncturing to ensure the sample's integrity.
Scraping blood from the heel can damage red blood cells, resulting in hemolysis. This method is not appropriate as it interferes with the cellular structure of the blood, compromising the quality of the specimen.
To avoid hemolysis during capillary blood collection in infants, warming the heel prior to puncture is crucial as it enhances blood flow and reduces the risk of cell damage. In contrast, other techniques such as excessive squeezing, using wet alcohol, or scraping the blood can lead to contamination and hemolysis, ultimately compromising the quality of the specimen. Proper techniques are essential for obtaining reliable blood samples, especially in vulnerable populations like infants.
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