You or your doctor’s office could be making mistakes in testing
Sometimes, people make mistakes in testing at home. Bring your home unit to your appointment and show it to your doctor to make sure it’s operating correctly. Make sure your arm cuff is the appropriate size for you. When you take readings at home, start by sitting quietly for five minutes. Then, be sure your back is supported, your feet are on the ground, and your arm is at heart level to get an accurate blood pressure reading.
Misreadings can also happen at your doctor’s office, says Dr. Thomas. The cuff might be the wrong size, or they might be taking a reading before you’re fully at rest.
To get a more accurate reading, Dr. Thomas takes six blood pressure readings in a row, each one minute apart, using an automated blood pressure machine. He or his staff observes the first reading but then you are alone in the room for the remaining five readings. They use the average of the last five readings to get the result.