Which finger on the dominant hand is preferred for fingerstick collection?

• A. 3rd or 4th finger on the dominant hand
• B. Thumb
• C. Index finger on the dominant hand
• D. Little finger

Answer: (A)

The fingerstick should be done on a finger that has good blood flow, is easy to access, and is least likely to be callused or injured. The ring finger (third finger) or the little finger (fourth finger) on the dominant hand fits this well. These fingers typically have reliable capillary perfusion and smoother skin, which helps produce a clean, visible blood drop with a shallow puncture. Using the dominant hand also gives you better control and dexterity during the stick, making the procedure steadier for the patient and more efficient for the collector. The thumb and index finger are less ideal because they often have thicker skin and more movement, which can hinder blood flow and increase discomfort, while the ring or pinky finger on the dominant hand provides a stable, accessible site for a quick, proper puncture.