I need to measure my PT/INR levels regularly, at least once per week. I want to be able to do the test once and be done.

Tips for a Successful Fingerstick

When using the Coag-Sense® Meter to measure PT/INR levels, there are several simple steps you can take to ensure that your fingerstick is successful.

  • First, make sure you have all the supplies you will need.
  • Next, for obtaining blood from a fingerstick, increasing the flow of blood in the finger will help to capture a good drop. Before you prick your finger, wash your hand in warm water, hold it under your armpit, or use a hand warmer. Make sure your hand is completely dry prior to testing.
  • Do not select fingers with tight rings, scars, calluses, or other impediments that prevent good access to the blood. Use of one of the middle or index fingers on either hand.
  • Gently squeeze or massage the finger to be lanced, near the tip. Good circulation can be seen if your fingertip changes to a pinkish shade.
  • For best results, use a 21g 1.8-2.2 mm depth single-use auto-disabling lancet. Smaller gauge/shallow depth lancets (i.e., Diabetes 23g lancets) should not be used. 
  • Next, lance the fleshy part of the fingertip just slightly left or right of the center. Press the lancet firmly against the finger.
  • Finally, you may hold your hand below your heart for better blood flow. If necessary, squeeze the finger from the sides to open the wound and ensure the proper blood flow to produce a pea sized drop.

PT/INR Test Recommendations

It is commonly recommended that a PT/INR test be completed once per week for optimal warfarin monitoring. For the best medication management, PT/INR results should be shared with providers once the test is completed.

Learn more about the Coag-Sense® Monitoring System by visiting here. Experience the simplicity of testing at home with an easy-to-use device that provides clear, actionable results. Benefit from the ability to transmit results seamlessly to your provider via Bluetooth, WiFi, ethernet, or USB.