CPT (Certified Phlebotomy Technician) Practice Exam

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What is the maximum depth for a heel-stick on an infant?

  1. 1mm

  2. 2mm

  3. 3mm

  4. 4mm

The correct answer is: 2mm

The correct answer is 2mm because when performing a heel stick on an infant, it is essential to minimize the risk of injury to sensitive tissues, including nerves and bones. The heel of an infant's foot is very thin and delicate, so a depth of 2mm is sufficient to obtain a blood sample from the capillaries without causing harm. Going deeper than this can potentially lead to complications such as puncturing the bone, which can cause pain or infection. Therefore, adhering to the guideline of a maximum depth of 2mm ensures both effective sample collection and the safety of the infant.

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