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When is a blood pressure measurement on the upper arm not suitable?

In general, both upper arm and wrist devices for blood pressure measurement at home are suitable. When used correctly, both types of devices are also sufficiently accurate. However, it is possible that not every device is equally sensible for everyone.

cuff size for blood pressure devices for the upper arm
For upper arm devices, it is important to pay attention to a suitable upper arm cuff. The included cuff may be too short for a strong upper arm. Therefore, it is advisable to measure the upper arm circumference in a relaxed state before purchasing. Some measuring devices come with cuffs that have a maximum width of 36 cm (sometimes even less). For strong upper arms, this may not be sufficient, and one should opt for a device with a longer cuff or a wrist device instead.

Some manufacturers offer longer cuffs as purchasable accessories. Cuffs that are too short, which may just barely fit around the arm but are not approved for the arm circumference and therefore fit poorly, can display falsely elevated values. Similarly, cuffs that are too narrow can lead to incorrect measurement results.

For particularly slender upper arms, it is also important to ensure that the cuff is not too wide and can be applied correctly. If this is not possible, the cuff may slip during the measurement, or due to the loose fit, incorrect measurement values may occur.
Cuff-style cuffs are easy to apply but can slip - especially when the upper arm tapers significantly towards the elbow. This often makes the measurement uncomfortable, and the values can be distorted. Similar issues can occur with this upper arm shape with pre-shaped cuffs that do not fit well. Here, the tissue could also be uncomfortably pinched.

People with a large upper arm circumference - for example, in cases of severe obesity - are now advised to measure at the wrist. The same should be heeded by individuals who have a large upper arm circumference due to muscle mass.

However, even with very slender arms, it is advisable to measure the upper arm circumference before purchasing a blood pressure monitor and to pay attention to a suitable cuff.

Please note that a blood pressure measurement with a cuff always compresses the arm or wrist. This is necessary because the blood flow must be temporarily restricted for the measurement. However, there is a difference between the normal, somewhat uncomfortable pressure, which is necessary, and a pinching sensation because the cuff does not fit.

Just as an upper arm measurement is not always advisable, measuring at the wrist is also not suitable for everyone. You can read why this is the case in our article „When is a blood pressure measurement at the wrist not suitable“.

Sources:

This article is published by BloodPressureDB.
The BloodPressureDB team has been known for its high expertise on the topic of high blood pressure on the German internet since 2009. The associated app is consulted daily by hundreds of thousands of users. All articles are extensively researched and created based on scientific facts. These facts are regularly checked and articles are updated to the latest standards.
Last update 12/2023

We hope you found the article on the topic helpful. Correct measurement is very important for good blood pressure management. Our app BloodPressureDB helps with that. Concrete explanations guide you through a guideline-compliant measurement. The app also reminds you if you wish. These features are also fully available in the free version. Get the free app now.


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