NHA Certified Phlebotomy Technician (CPT)Collection RoutineEasy
A phlebotomy technician is performing a capillary puncture on an infant. Which of the following sites is appropriate for this procedure?
- AThe earlobe, to minimize discomfort.
- BThe antecubital fossa, using a micro-collection device.
- CThe central fleshy part of the finger.
- DThe heel, specifically the medial or lateral plantar surface.
Show answer & explanationAnswer & explanation
Correct answer: D. The heel, specifically the medial or lateral plantar surface.
For infants, capillary punctures are performed on the heel, specifically the medial or lateral plantar surfaces, to avoid injury to bone or nerves in other areas.
Why the other options are wrong
- A. The earlobe is not a standard or recommended site for capillary puncture in infants due to poor circulation and potential for inadequate sample.
- B. The antecubital fossa is used for venipuncture, not capillary puncture, and is not appropriate for infants using micro-collection devices.
- C. Finger punctures are not recommended for infants due to the risk of bone injury.
Infant Capillary Puncture Site
For infants (typically under 12 months), capillary punctures are safely performed on the heel to prevent bone damage and ensure adequate blood flow.
- Medial or lateral plantar surface of the heel.
- Avoid central arch of the foot.
- Depth of puncture should not exceed 2.0 mm.
Memory trick: For the littlest, stick to the heel!