CPT (Certified Phlebotomy Technician) Practice Exam

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What can cause petechiae?

  1. A. Prolonged tourniquet placement

  2. B. Excessive pressure during needle insertion

  3. C. Allergic reaction to the antiseptic

  4. D. Tourniquet left on for too long

The correct answer is: D. Tourniquet left on for too long

Prolonged tourniquet placement can indeed lead to the development of petechiae. When a tourniquet is applied and left on for an extended period, it can cause increased pressure in the blood vessels, particularly in the capillaries. This excessive pressure can lead to small capillaries breaking, resulting in petechiae, which are tiny red or purple spots that appear on the skin. It is essential for phlebotomy professionals to be aware of the potential for petechiae and to mitigate this risk by adhering to recommended guidelines for tourniquet application duration.

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