Key Steps for Accurate At-Home Blood Pressure Readings

by Dr. Grace Downs

If you have had an elevated blood pressure reading during a visit, your doctor may have recommended measuring your blood pressure at home. When measuring your blood pressure, there are a lot of factors that can cause the reading to be inaccurate. If you are not getting accurate readings, it is hard to tell how well your treatment for high blood pressure may be working.

Below are 7 ways to make sure you are getting the MOST accurate at home blood pressure reading!

1. Use an arm cuff rather than a wrist cuff:

Arm cuffs are generally more accurate than wrist cuffs, so making sure to measure with an arm cuff can be an easy way to get a more accurate reading. 

2. Use correct cuff size:

One of the keys to getting an accurate reading is making sure that you are using the correct cuff size for your arm. Using too small a cuff can increase the reading by 2-10 mmHg (for example: if a normal reading for you is 130/80, if you have the wrong size cuff it could give you a false reading of 132/82 up to 140/90!).

3. Put the cuff on bare skin:

Measuring blood pressure over your clothes can increase the blood pressure measurement anywhere from 5 to 50 mmHg! This can be huge in making sure the reading is accurate! 

4. Don’t talk while taking the reading:

You may find yourself having conversations while taking your blood pressure, but this can increase the reading by 10 mmHg. Some sources even say active listening can also increase the reading. So make sure to pause any conversations before measuring your blood pressure. 

5. Have proper posture:

Having proper posture while taking a blood pressure measurement is a very important component to getting an accurate reading. First, make sure that your back and feet are supported. This means having your back rest against the back of a chair and your feet flat on the ground. Second, keep your legs uncrossed. Third, rest your arm on the arm of a chair or a table so that it is relaxed and at heart level. Having incorrect posture can affect blood pressure readings anywhere from 2 to 10 mmHg. 

6. Have an empty bladder:

Before you measure your blood pressure, make sure to empty your bladder. A full bladder can increase a blood pressure reading by 10 mmHg.

7. Calibrate your blood pressure monitor:

It can be helpful to bring your blood pressure monitor to your doctors appointment with you to make sure your monitor is calibrated properly and not giving inaccurate readings. 

Pro tip: sit for 5 minutes quietly taking deep calming breaths before measuring your blood pressure. Doctors want to see what your blood pressure is at your calmest, so it can be helpful to take the time to calm your mind and body before checking your blood pressure! 

If you have questions or want more information on treating high blood pressure, you can always schedule an appointment with me or one of the other providers to learn more! 

warmly,

Dr. Downs

Information adapted from the American Medical Association.