A client newly diagnosed with diabetes mellitus is having difficulty learning the technique of blood glucose measurement. The nurse should teach the client to do which action to perform the procedure properly?

• A. Wash the hands first using cold water.
• B. Puncture the center of the finger pad.
• C. Puncture the finger as deeply as possible.
• D. Let the arm hang dependently and milk the digit.

Answer: (D)

In fingerstick glucose testing, the goal is to obtain a usable blood sample quickly and accurately by promoting good peripheral blood flow and minimizing contamination. Allowing the arm to hang dependent uses gravity to increase capillary perfusion in the fingertips, while gently milking the finger helps push blood toward the fingertip to form a sufficient drop for testing. This combination reduces the chance of getting an insufficient sample or tissue fluid interference, which can skew readings. Avoid puncturing the center of the finger pad or inserting the needle deeply, since that increases pain and tissue trauma. Warm hands and a clean technique further support proper blood flow. So, letting the arm hang down and gently milking the digit best achieves a reliable drop for the glucose meter.