Using the correct size is important for an accurate reading. With your arm hanging at the side of your body, measure the circumference of your upper arm at the midpoint between shoulder and elbow. Based on that information, you can determine what size cuff would work for you using the chart below (also available in the instruction manual):
- Small Cuff 6.3 - 9.4" (16-24cm)
- Medium Cuff 9.4 - 14.2" (24 - 36cm)
- Large Cuff 14.2 - 17.7" (26 - 45cm)
- Extra Large Cuff 16.5-23.6" (42 - 60cm)
Also please be sure to consult your physician immediately if you have any doubt about your readings. Should a mechanical problem occur, contact LifeSource.