A protocol design for evaluation of wearable cuff-less blood pressure measuring devices

Yan, Iris Renfei; Poon, Chi‐Sang; Zhang, Yuan-Ting

doi:10.1109/iembs.2009.5333380

Cited by 7 publications

(2 citation statements)

References 15 publications

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“…Therefore, it is well documented that there is a need to be able to continuously monitor BP without the use of a cuff. 4 One potential way to achieve this is by using pulse transit time (PTT) method that is able to track BP over a short period of time, after an initial calibration reading. 5 After this period, which is usually of the order of minutes, the BP needs to be measured again.…”

Section: Introductionmentioning

confidence: 99%

An examination of calibration intervals required for accurately tracking blood pressure using pulse transit time algorithms

et al. 2013

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Pulse transit time (PTT) is defined as the time it takes the blood pressure (BP) wave to propagate from the heart to a specified point on the body. After an initial BP measurement, PTT can track BP over short periods of time. This paper evaluates two PTT algorithms: Chen's and Poon's algorithm; two of the most cited works in the area. The criteria for evaluating them were: which was capable of best tracking changes in BP and which provided the longest time between subsequent BP measurements. These establish the suitability of the PTT method for practical applications, which has not been examined previously. Accuracy was evaluated using the Association of Advancement of Medical Instrumentation (AAMI) and the British Hypertension Society's (BHS) standards. Results show that Chen's algorithm is dependent on its lookup table at short intervals but remains accurate using a 6-min calibration interval, with r ¼ 0.96 and r 2 ¼ 0.98. Poon's algorithm fails when using a 2-min calibration interval, but is more capable of reflecting changes in BP. The short calibration interval and accuracy limit the usefulness of calculating BP using PTT. Therefore, neither of the algorithms can be recommended because of their shortcomings when estimating BP.

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Section: Introductionmentioning

confidence: 99%

An examination of calibration intervals required for accurately tracking blood pressure using pulse transit time algorithms

et al. 2013

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“…An important limitation is that methods for inducing the BP changes were not specified, rendering this standard to be more theoretical than implementable. Indeed, few studies have attempted to implement this standard, and they failed to properly address the key step of inducing BP changes (especially BP lowering) [20,21]. Thus, it is crucial to explicitly define methods for inducing BP changes which are reproducible and applicable for all device types and feasible for many validation centers.…”

Section: Institute Of Electrical and Electronics Engineers (Ieee) Sta...mentioning

confidence: 99%

European Society of Hypertension recommendations for the validation of cuffless blood pressure measuring devices: European Society of Hypertension Working Group on Blood Pressure Monitoring and Cardiovascular Variability

Stergiou,

Avolio,

Palatini

et al. 2023

Journal of Hypertension

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Background:There is intense effort to develop cuffless blood pressure (BP) measuring devices, and several are already on the market claiming that they provide accurate measurements. These devices are heterogeneous in measurement principle, intended use, functions, and calibration, and have special accuracy issues requiring different validation than classic cuff BP monitors. To date, there are no generally accepted protocols for their validation to ensure adequate accuracy for clinical use.Objective:This statement by the European Society of Hypertension (ESH) Working Group on BP Monitoring and Cardiovascular Variability recommends procedures for validating intermittent cuffless BP devices (providing measurements every >30 sec and usually 30–60 min, or upon user initiation), which are most common.Validation procedures:Six validation tests are defined for evaluating different aspects of intermittent cuffless devices: static test (absolute BP accuracy); device position test (hydrostatic pressure effect robustness); treatment test (BP decrease accuracy); awake/asleep test (BP change accuracy); exercise test (BP increase accuracy); and recalibration test (cuff calibration stability over time). Not all these tests are required for a given device. The necessary tests depend on whether the device requires individual user calibration, measures automatically or manually, and takes measurements in more than one position.Conclusion:The validation of cuffless BP devices is complex and needs to be tailored according to their functions and calibration. These ESH recommendations present specific, clinically meaningful, and pragmatic validation procedures for different types of intermittent cuffless devices to ensure that only accurate devices will be used in the evaluation and management of hypertension.

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Design of Clinical Trials to Validate Cuffless Blood Pressure Monitors

Verberk

2019

The Handbook of Cuffless Blood Pressure Monitoring

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A protocol design for evaluation of wearable cuff-less blood pressure measuring devices

Cited by 7 publications

References 15 publications

An examination of calibration intervals required for accurately tracking blood pressure using pulse transit time algorithms

An examination of calibration intervals required for accurately tracking blood pressure using pulse transit time algorithms

European Society of Hypertension recommendations for the validation of cuffless blood pressure measuring devices: European Society of Hypertension Working Group on Blood Pressure Monitoring and Cardiovascular Variability

Design of Clinical Trials to Validate Cuffless Blood Pressure Monitors

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