Where can a skin puncture be performed?

Where can a skin puncture be performed?

• A. The index finger only
• B. The middle and ring fingers, as well as the heel of the foot
• C. The thumb only
• D. The pinky finger only

Answer: (B)

When performing a skin puncture, you want sites that give reliable capillary blood with minimal tissue damage. The middle and ring finger tips are ideal because they have good capillary networks and are easy to access, making sample collection straightforward. The heel of the foot is included as a site for newborns, since their hands are very small and a heel stick provides a safer, effective alternative for obtaining blood. The other options aren’t standard choices for routine capillary puncture: the thumb, index finger, or pinky are not typically used because of space, accessibility, or anatomical considerations that can make punctures more difficult or uncomfortable.

When performing a skin puncture, you want sites that give reliable capillary blood with minimal tissue damage. The middle and ring finger tips are ideal because they have good capillary networks and are easy to access, making sample collection straightforward. The heel of the foot is included as a site for newborns, since their hands are very small and a heel stick provides a safer, effective alternative for obtaining blood.

The other options aren’t standard choices for routine capillary puncture: the thumb, index finger, or pinky are not typically used because of space, accessibility, or anatomical considerations that can make punctures more difficult or uncomfortable.