Capillary collection tubes differ in that they...

• A. They are used for venipuncture only
• B. They cannot be used for finger sticks
• C. They are used for capillary collection and have wide mouths
• D. They are used for capillary collection and collect blood from a finger stick

Answer: (D)

Capillary collection tubes are made for obtaining blood from capillary punctures, such as a finger stick, and not for venipuncture. That combination—being used for capillary collection and drawing blood from a finger stick—is what sets them apart from tubes used for standard vein draws. So this option best describes their purpose. The other statements incorrectly limit or describe capillary tubes (they’re not restricted to venipuncture, they can be used with finger sticks, and a wide-mouth feature isn’t the defining trait).