Which term corresponds to the technique when only a small amount of blood is needed as a specimen for a blood test?

• A. capillary puncture process
• B. capillary puncture equipment
• C. Sorting mail
• D. capillary puncture definition

Answer: (D)

The technique for obtaining a small blood sample is capillary puncture, performed as a quick, controlled puncture to access capillary blood from a fingertip or heel. The term that best matches this practice is capillary puncture process because it denotes the procedural aspect of performing capillary sampling.

Choosing the term that refers to the equipment would name the tools used, not the technique itself, and capillary puncture definition would describe what capillary puncture means rather than how to perform it. The unrelated option about sorting mail has no relevance to this medical procedure. Capillary puncture is commonly used when only a tiny volume of blood is needed, such as for certain point-of-care tests or newborn screening, where a small drop is sufficient.