Choosing a cuff · Canada
Blood pressure cuff size and monitor compatibility
Measure your upper arm before you choose a blood pressure monitor. The cuff’s printed range and the monitor’s exact model number are the two checks that matter when buying a replacement.
Measure around the middle of your upper arm
- Find the midpoint between your shoulder and elbow on the arm you use for readings.
- Wrap a flexible tape around your bare arm at that point. Keep the tape level and snug without pressing into the skin.
- Write down the circumference in centimetres. Compare it with the range printed on the cuff or in the monitor’s manual.
If the measurement is close to the end of the range or the cuff slips or gaps on your arm, ask a pharmacist to check the fit.
Read the printed cuff range
| Arm circumference | Example label | What to check |
|---|---|---|
| 21 cm | 17–22 cm | A cuff labelled 22–42 cm starts above this measurement. |
| 32 cm | 22–42 cm | This measurement falls within that cuff’s range. |
| 47 cm | 32–52 cm | Confirm that this range is available for your monitor and included in the box or sold separately. |
These are examples of ranges found on Canadian device listings. Labels such as regular, large and wide range can cover different measurements across models.
Check a replacement against the exact device
Find the full model number on the monitor, including its suffix. Look up the permitted replacement cuff and its part number in the model’s manual or the manufacturer’s Canadian support information. Cuff range, connector and monitor compatibility all matter. A connector that fits can still leave uncertainty about whether the manufacturer supports that cuff.
Before ordering, check whether the listing includes the size you need. A product family may have several cuff packages. For a shared monitor, measure both users and check the range for each person.
Why fit affects the measurement
A randomized crossover study found that using a regular cuff on people who needed a larger cuff tended to raise the systolic reading. It tended to lower the reading for people who needed a smaller cuff. Choose the correct size before looking for differences between devices.
Hypertension Canada favours a validated upper-arm monitor for home use. Its device list reserves wrist monitors for people who cannot be fitted with a suitable upper-arm cuff. A healthcare provider or pharmacist can help if fit remains difficult.
Compare upper-arm blood pressure monitors in Canada