Puncture Sites CHOOSING THE RIGHT ONE Product Quick Finder close Product Quick Finder Show results Choose a category or subcategory Show categories B. Braun Sharing Expertise Patients Diabetes Care for Patients Capillary Blood Collection Puncture Sites Collecting capillary blood Optimal puncture sites Choose middle, ring or little finger of the non-dominant hand. Puncture at the fingertip, slightly off-center as circled in green. Note: A single drop of blood is enough. Frequent punctures of the fingertips require good skin care! Related topics Typical steps of capillary blood collection Tips and tricks