Measuring your upper arm circumference helps ensure that you select the correct cuff size and obtain accurate blood pressure readings. The Hilo Cuff is designed for upper arm circumferences between 8¾ in and 16½ in; if your measurement falls outside this range, the cuff should not be used.
What you need:
A flexible measuring tape (or a string and a ruler)
Your bare upper arm (no clothing)
Step-by-step instructions:
Relax your arm: Let your arm hang naturally by your side, relaxed and not flexed.
Find the midpoint of your upper arm: Locate the middle point between:
The top of your shoulder (acromion), and
The tip of your elbow (olecranon)
Wrap the measuring tape around your arm
Place the tape around your upper arm at the midpoint
Ensure the tape is snug but not tight
It should lie flat against the skin without compressing it
Read the measurement
Read the circumference in inches (in)
If using a string, mark the length and measure it against a ruler
Disclaimer: This FAQ is intended as supplementary guidance only and does not replace the Instructions for Use (IFU), User Manual, or Quick Start Guide. In case of any inconsistency or conflict, the IFU, User Manual, or Quick Start Guide contact support.