24 Hour Blood Pressure Monitors

Ambulatory Blood Pressure Monitors for 24-Hour Blood Pressure Monitoring

Ambulatory blood pressure monitors (ABPM devices) measure a patient's blood pressure continuously over an extended period outside the clinical setting. During 24-hour ambulatory blood pressure monitoring (ABPM), the patient wears a compact recorder and an upper arm cuff while going about their normal daily activities. The device automatically performs measurements at pre-programmed intervals and records the systolic and diastolic blood pressure values as well as, depending on the system, the heart rate.

This creates a comprehensive 24-hour blood pressure profile that reflects both daytime and nighttime blood pressure patterns. Compared with a single blood pressure measurement taken in a surgery or clinic, or occasional self-monitoring at home, ambulatory blood pressure monitoring provides additional insights into blood pressure fluctuations over the course of a full day and night.

When is ambulatory blood pressure monitoring used?

24-hour ambulatory blood pressure monitoring (ABPM) is primarily used when elevated blood pressure readings in a clinical setting require further investigation or when suspected hypertension needs to be confirmed. It can also help identify differences between blood pressure values measured in a practice or clinic and those recorded during everyday activities.

Typical applications include:

further assessment of elevated blood pressure readings in a clinical setting
investigation of possible white coat hypertension
assessment of possible masked hypertension
evaluation of blood pressure patterns during the day and night
monitoring of antihypertensive therapy
identification of possible blood pressure peaks or hypotensive episodes
assessment of the nocturnal blood pressure dip

For confirming persistent suspected hypertension following blood pressure measurements taken in a clinical setting, 24-hour ambulatory blood pressure monitoring is the preferred method recommended by the German National Disease Management Guideline for Hypertension. International guidelines also emphasise the importance of out-of-office blood pressure measurements. The specific indication and clinical interpretation of the blood pressure profile depend on the individual patient's situation.

How a 24-hour blood pressure monitor works

A 24-hour blood pressure monitor generally consists of a portable recorder, a connecting tube, an upper arm cuff and software for data analysis. Before monitoring begins, the device is programmed in the medical practice and then fitted to the patient.

Throughout the recording period, the cuff automatically inflates at pre-set intervals. Many devices use the oscillometric method: they detect pressure fluctuations within the cuff caused by the pulse and calculate the corresponding blood pressure values. The measurement data is stored in the recorder's internal memory and transferred to analysis software after the device is returned via cable, USB connection or Bluetooth.

Set daytime and nighttime intervals individually

The flexibility of the programmable measurement intervals is crucial for obtaining meaningful results while ensuring patient comfort. Shorter intervals are generally required during the day than at night. Depending on the device, different time periods, fixed intervals or, in some cases, randomised measurement times can be configured.

What are the differences between ambulatory blood pressure monitors?

The available systems fulfil the same basic purpose but differ in terms of software, data transfer, analysis options, operation and expandability. When selecting a device, the complete system should therefore be considered rather than just the recorder. This includes the device itself, cuffs, interfaces and analysis software.

Complete system or additional recorder?

For medical practices starting with ambulatory blood pressure monitoring, a complete system including software, connection accessories, carrying case and suitable cuffs is generally the best choice. When expanding an existing range of devices, an additional recorder without the need for another software licence may be a more economical option.

Before ordering, the following points should be checked:

Is the required analysis software included?
Is a compatible software licence already available in the medical practice?
Which cables, adapters or interfaces are included in the scope of delivery?
Are all required cuff sizes supplied?
Can the system be expanded with additional recorders at a later stage?

For example, the boso TM-2450 is available in several versions, including options with or without software as well as a secondary device with reduced accessories. The TONOPORT VI is available with or without CardioSoft software. This allows both new workstations to be set up and existing device environments to be expanded.

USB, Bluetooth and integration into clinical workflows

The type of data transfer determines how the recorder is read out after monitoring has been completed. A USB connection enables direct wired data transfer, while Bluetooth can simplify the transfer process if the existing IT environment and the relevant software support this connection.

The Walk200b ABPM is available in versions with Bluetooth or a combination of Bluetooth and USB. Its internal memory stores up to 300 measurements. The device can also be ordered with or without Cubeabpm readout and analysis software.

When selecting a system, it is important to consider not only the available interface but also compatibility with the operating system, software version and existing clinical workflow.

Standard analysis or advanced haemodynamic analysis?

Classic ambulatory blood pressure monitors provide, among other things, individual readings, average values and the progression of systolic and diastolic blood pressure over time. Depending on the software, daytime and nighttime phases can be analysed separately, making it easier to assess irregularities in the measurement profile.

For cardiology or vascular medicine practices, additional analysis functions may be relevant. Some systems can optionally be expanded with pulse wave analysis. This provides additional parameters relating to central haemodynamics and arterial stiffness. Different software configurations are also available for the Welch Allyn ABPM 7100, including a version with PWA software.

Such an extension is not required for every routine application. It should primarily be considered when the corresponding parameters form part of the facility's diagnostic services and appropriate clinical interpretation can be ensured.

Important selection criteria for an ambulatory blood pressure monitor

Validated measurement accuracy

For professional blood pressure diagnostics, devices should be used that have been tested for measurement accuracy according to recognised protocols. Information on validation, measurement methods and the intended patient group are therefore important factors when comparing products.

Validation for adults cannot automatically be applied to specific patient groups. If the device is intended for use in children, pregnant patients or patients with particular clinical requirements, it should be checked whether the manufacturer has approved the device for these applications and whether corresponding validation data is available.

Suitable cuff size

The cuff must match the patient's upper arm circumference. An unsuitable size can affect measurement accuracy and reduce wearing comfort. For use in medical practices, a range of cuffs from small to large and extra-large sizes is therefore beneficial.

The following aspects should be considered:

available circumference range
clear size identification
artery marking
secure tube connection
skin-friendly and comfortable material
availability of replacement cuffs
manufacturer instructions for cleaning and disinfection

For practices with a diverse patient population, it is advisable to check which cuffs are included in the set and which sizes need to be purchased separately when selecting a system.

Weight, dimensions and operating noise

The recorder is worn on the body for many hours. A compact, lightweight and quiet device can improve patient acceptance, particularly during nighttime measurements. A carrying case with an adjustable strap facilitates close-to-body positioning and protects the device during everyday use.

The inflation control is also an important factor. The Welch Allyn ABPM 7100, for example, uses Auto Feedback Logic, which is designed to help prevent unnecessary overinflation of the cuff. The device has a compact, lightweight and low-noise design.

Power supply and storage capacity

Before the device is fitted, it must be ensured that the batteries or rechargeable batteries provide sufficient power for the planned monitoring period. Rechargeable batteries can reduce ongoing consumable costs during regular use but require a reliable charging process within the clinical workflow.

In addition to the power supply, storage capacity should also be considered. It must be sufficient to save all programmed measurements, including any repeat measurements.

Operation and analysis software

Clear and intuitive programming reduces preparation time and the risk of incorrect settings. Useful features include well-structured menus, clearly visible status indicators and software that provides an easy-to-understand overview of measurement gaps, daytime and nighttime values as well as statistical parameters.

For facilities with multiple users, it is also important to consider how easily standardised measurement protocols can be created and reused. A consistent approach simplifies preparation by the practice team and supports reproducible workflows.

Which ambulatory blood pressure monitor is suitable for a medical practice?

For general practice or internal medicine applications, a compact ABPM system with individually programmable intervals, clear standard analysis functions and a suitable range of cuffs is usually appropriate. The boso TM-2450 combines individually adjustable measurement intervals with a manual sleep button and is available in different software and accessory configurations.

For practices requiring an easy-to-program device with optional CardioSoft integration, the TONOPORT VI is a suitable option. Availability with or without software allows adaptation to existing GE system environments.

The Walk200b ABPM is particularly suitable when Bluetooth or combined Bluetooth and USB data transfer is required. The option to choose a version with or without Cubeabpm software allows the system to be adapted to existing workstations.

For facilities requiring advanced haemodynamic assessment, systems such as the appropriately equipped versions of the Welch Allyn ABPM 7100 offer additional analysis options. The decisive factor is not the largest possible range of functions, but rather which parameters are actually required within the individual diagnostic concept and can be professionally interpreted.

Accessories for ambulatory blood pressure monitoring

Typical accessories for an ambulatory blood pressure monitoring system include:

reusable cuffs in various sizes
connecting tubes
carrying cases and straps
batteries or rechargeable batteries
chargers
USB or interface cables
software licences and expansion modules
adapters and replacement parts, where applicable

Accessories are generally device- or manufacturer-specific. Cuffs, cables and software modules should therefore not be selected based solely on their appearance. The decisive factor is confirmed compatibility with the respective recorder and device generation.

Cleaning and hygienic reprocessing

Recorders, tubes, carrying cases and cuffs come into contact with the patient or their clothing during monitoring. Hygienic reprocessing must therefore be carried out according to the manufacturer's instructions and the applicable requirements of the facility.

Before cleaning, it should be checked which surfaces can be disinfected by wiping, whether cuffs are washable and which cleaning or disinfecting agents are approved. Electronic components must not be immersed in liquids unless explicitly permitted by the manufacturer. Damaged cuffs, leaking tubes or unreliable hook-and-loop fasteners should be replaced.

Select ambulatory blood pressure monitors at Praxisdienst

At Praxisdienst, you will find professional ambulatory blood pressure monitors from Bosch + Sohn, Welch Allyn, Cardioline and IEM. The range includes devices for 24-hour ambulatory blood pressure monitoring as well as suitable software versions, cuffs, carrying cases and other device-specific accessories.

Before purchasing, compare factors such as measurement method, validation information, software features, interfaces, cuff selection and possible analysis extensions. When setting up a new system, it should also be considered whether a complete starter set is required or whether existing software and accessory components can continue to be used.