24 Hour Blood Pressure Monitoring

Ambulatory Blood Pressure Monitor (ABP Monitor) measures a patient’s blood pressure at periodic intervals throughout a 24 hour period.

Ambulatory Blood Pressure Monitor (ABP Monitor) measures a patient’s blood pressure at periodic intervals throughout a 24 hour period.

What is a Blood Pressure Monitor?

An Ambulatory Blood Pressure Monitor (ABP Monitor) measures a patient’s blood pressure at periodic intervals throughout a 24 hour period as he / she goes about their normal activities.

The blood pressure is measured by a cuff which is placed around the arm in the same way that would done by your doctor.

Why perform a 24 Hour Blood Pressure Monitoring Test?

We perform this test to either diagnose or monitor hypertension (High Blood Pressure).

What happens during the Blood Pressure Monitor period?

The Monitor measures the blood pressure every 30 minutes between 8am and 10pm and every 60 minutes between 10pm and 8am.

To do this, the monitor inflates the cuff (so it becomes tight around the arm) and then deflates – this is when the measuring is taking place.  During times of measurement, if it is safe to do so, please sit or stand still with the arm that the cuff is on hanging freely by the side. 

Any tensing of muscles, shaking of hands or movement of the arm, could interfere with the measurement which will only cause the monitor to repeat the reading in a few minutes.

There may be times, such as when driving a vehicle, that the monitor commences a measurement.  At a time like this, it would not be safe to remove your hand from the steering wheel and dangle your arm down by your side.  Don’t be concerned about missing the occasional measurement for this reason.

If you have any difficulties with the equipment, please notify the office.

What you CAN NOT do during your Blood Pressure Monitoring test period

For the duration of your Ambulatory Blood Pressure Monitoring you can not:

  • Remove the Monitor from its pouch, or tamper with the tubing or battery as this may erase data from the device.

  • Have a bath / swim / shower with the monitor on - you cannot get the monitor wet

Preparation for an Ambulatory Blood Pressure (ABP) Monitor

On the day of the Blood Pressure Monitor Test we recommend the following:

  • That you bath or shower before your appointment as you will not be able to do so while the monitor is on.

  • There are no specific dietary preparations for this test.

What to wear during the Blood Pressure Monitoring period

When you enter the test room patients are required to:

  • Undress to the waist, so it is best if you choose to wear a two-piece outfit,

  • Manipulation of bras (on and off) during the monitoring period risks dislodging electrodes and / or leads, therefore women are asked to commit to either wearing no bra for the monitoring period, or wearing a bra for the whole 24 hours without removing it.  If “bra-on” is your preference, please wear your most comfortable one.

Blood Pressure Monitor Test Connections

Patients are prepared for the test by having the cuff connected by a rubber hose to a small monitor (about 10cm x 7cm x 2.5cm) which is worn on a belt around the waist.

Booking a Blood Pressure Monitor Test

You must attend on 2 consecutive days for this test. Patients - are required to return at the same time the next day, or a little earlier. Please check the time with the Technician

Day One: This is when the ABP Monitor is applied. This usually takes 15 to 30 minutes.

Day Two: The next day patients return to have the ABP Monitor removed. This usually takes 10 to 15 minutes.