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How to Monitor your Blood pressure?

There are two types of blood pressure monitors:

  • Automatic monitors. These are easier to use. They do the listening for you.
  • Manual monitors. This is the kind of device you usually see at the doctor's office. It involves using a stethoscope to listen to the heartbeat.

Buying and maintaining a monitor

When you first get a blood pressure device, check its accuracy. Do this by comparing its readings with those you get at the doctor's office. Ask your doctor or nurse to watch you use your device to make sure that you are doing it right and that it works right. It's a good idea to have your device checked every year at the doctor's office.

The size of the and where you place it can greatly affect how accurate your device is. If the cuff is or , the results won't be right. You may have to measure your arm and choose a monitor that comes in the right size.

A monitor that measures blood pressure in your arm is recommended for most people. Blood pressure monitors used on the wrist aren't as reliable as those that use arm cuffs. Wrist monitors should be used only by people who can't use arm cuffs for physical reasons. And devices that use finger monitors aren't recommended at all.

Check your blood pressure cuff often. Make sure all of the parts of your monitor are in good condition. Even a small hole or crack in the tubing can lead to inaccurate results.

Getting ready

Before you take your blood pressure:

  • Don't eat, smoke, or exercise for at least 30 minutes. And don't use any medicines that can raise blood pressure, such as certain nasal sprays.
  • Rest at least 5 minutes before you take a reading. Sit in a comfortable, relaxed position with both feet on the floor. Don't move or talk while you are measuring your blood pressure.
  • Try not to take your blood pressure if you are nervous or upset.
  • If you can, use the same arm for every reading. Readings may be 10 to 20 mm Hg different between your right arm and your left arm.

Remember that blood pressure readings vary throughout the day. They usually are highest in the morning after you wake up and move around. They decrease throughout the day and are lowest in the evening.

When you first start taking your blood pressure at home, always take your blood pressure 3 times. Wait 1 to 2 minutes between recordings to let the blood flow back into your arm. After you get better at doing it, you probably will need to do it only once or twice each time.

Using an automatic blood pressure monitor

  1. Sit with your arm slightly bent and resting comfortably on a table so that your upper arm is on the same level as your heart.
  2. Wrap the blood pressure cuff around your bare upper arm. The lower edge of the cuff should be about 1 inch (2.5 cm) .
  3. Press the on/off button.
  4. Wait until the ready-to-measure "heart" symbol appears next to zero in the display window.
  5. Press the start button. The cuff will inflate.
  6. After a few seconds, the cuff will begin to deflate. The numbers on the screen will begin to drop.
  7. When the measurement is complete, the heart symbol stops flashing. The numbers tell you your blood pressure and pulse.

Using a manual blood pressure monitor

If you're not familiar with using a stethoscope, you may want to get help from someone who is. The accuracy of a blood pressure recording depends on putting the stethoscope in just the right place.

  1. Close the valve on the rubber inflating bulb. Squeeze the bulb rapidly with your opposite hand to inflate the cuff. Keep squeezing until the dial or column of mercury reads about 30 mm Hg higher than your usual . (If you don't know your usual pressure, inflate the cuff to 210 mm Hg.) The pressure in the cuff will temporarily stop all blood flow in your arm.
  2. Put the stethoscope over the large artery slightly above the inside of your elbow. You can find this artery by feeling for its pulse with the fingers of your other hand. If you are using a cuff with a built-in stethoscope, be sure the part of the cuff with the stethoscope is over the artery. Don't let the stethoscope rub on the cuff or your clothing. This may cause noises that make your pulse hard to hear.
  3. Open the valve on the bulb just slightly. The numbers on the pressure dial or mercury tube should fall gradually—about 2 to 3 mm Hg per second. Some devices automatically control the fall at this rate.
  4. Listen through the stethoscope. As you watch the pressure slowly fall, note the number on the dial or tube when you first start to hear a pulsing or tapping sound. The sound is caused by the blood starting to move through the closed artery. This is your systolic blood pressure.
  5. Continue letting the air out slowly. The sounds will become muffled and finally will disappear. Note the number when the sounds completely disappear. This is your diastolic blood pressure. Finally, let out all the remaining air to take the cuff off.

Keep a blood pressure diary

Keep a blood pressure diary. Your records may help explain changes in your blood pressure readings and help your doctor make sure you get the right treatment.

Everyone's blood pressure changes from day to day and even from minute to minute sometimes. Blood pressure tends to be higher in the morning and lower at night. Stress, smoking, eating, exercise, cold, pain, noise, medicines, and even talking can affect it.

Record your blood pressure numbers with the date and time. You might use a home blood pressure log (What is a document?) or a spreadsheet on your computer. Your monitor might have a feature that will record your numbers for you. Some monitors can transfer this information to your computer.

Also record your daily activities, such as the time you take medicine or if you feel upset or feel stressed.

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