Get the most out of home blood pressure monitoring

Checking your blood pressure at home is an important part of managing high blood pressure. Find out how to use home monitors accurately.

By Mayo Clinic Staff

Checking your blood pressure at home is an important part of managing high blood pressure (hypertension).

The American Heart Association (AHA) and other organizations recommend that anyone with high blood pressure monitor his or her blood pressure at home. Home monitoring can help you keep tabs on your blood pressure in a familiar setting, make certain your medication is working, and alert you and your doctor to potential health complications.

Blood pressure monitors are available widely and without a prescription, so home monitoring is an easy step toward improving your condition. Before you start, it's important to know the right technique and to find a good home blood pressure monitor.

Why do I need to monitor my blood pressure at home?

Monitoring your blood pressure at home can:

  • Help with early diagnosis. Self-monitoring can help your doctor diagnose high blood pressure earlier than if you have only occasional blood pressure readings in a medical office. Home monitoring is especially important if you have slightly elevated blood pressure (prehypertension) or another condition that could contribute to high blood pressure, such as diabetes or kidney problems.
  • Help track your treatment. The only way to know whether your lifestyle changes or medications are working is to check your blood pressure regularly. Monitoring blood pressure changes at home can help you and your doctor make decisions about your treatment, such as adjusting dosages or changing medications.
  • Encourage better control. Self-monitoring can give you a stronger sense of responsibility for your health. You may feel even more motivated to control your blood pressure with an improved diet, physical activity and proper medication use.
  • Cut your health care costs. Self-monitoring might decrease your number of visits to your doctor or clinic.
  • Check if your blood pressure differs outside the doctor's office. Some people experience spikes in blood pressure due to anxiety associated with seeing a doctor (white coat hypertension). Other people have normal blood pressure at a clinic but elevated pressure elsewhere (masked hypertension). Monitoring blood pressure at home can help determine if you have true high blood pressure.

Not everyone can track blood pressure at home. If you have an irregular heartbeat, home blood pressure monitors might not give you an accurate reading.

Types of home monitors

Most pharmacies, medical supply stores and some websites sell home blood pressure monitors. An automatic or electronic device is recommended. Discuss the choices with your doctor so that you pick the monitor that's best for your situation.

Monitors generally have the same basic parts:

  • Inflatable cuff. The cuff's inner layer fills with air and squeezes your arm. The cuff's outer layer has a fastener to hold the cuff in place. Heart rate and blood flow are automatically calculated by measuring the changes in the motion of your artery as the blood flows through while the cuff deflates.
  • Gauge for readouts. Some blood pressure monitors can take multiple readings and report the averages.

Digital monitors that are fitted on the upper arm are generally the most accurate.

If you can't find a cuff big enough for your upper arm, ask your doctor about fitting a cuff to your lower arm or wrist. These types of cuffs can be difficult to use correctly. Ask your doctor if they might be options for you and how they should be used.

Devices that measure your blood pressure at your finger aren't recommended.

Public blood pressure machines

Public blood pressure machines, such as those found in pharmacies, have generally not been recommended because of concerns about accuracy.

Some public blood pressure machines — including A&D TM-2655, Keito K6 and Pharma-Smart PS-2000 — are listed by the Dabl Educational Trust and have been approved by the Food and Drug Administration. However, there hasn't been clear evidence of accurate results from these machines. Also, their locations and availability differ.

Ask your doctor for advice on using public blood pressure machines.

May 23, 2015 See more In-depth