Ballistocardiogram-Based Approach to Cuffless Blood Pressure Monitoring: Proof of Concept and Potential Challenges

Kim, Chang‐Sei; Carek, Andrew M.; Inan, Omer T.; Mukkamala, Ramakrishna; Hahn, Jin‐Oh

doi:10.1109/tbme.2018.2797239

Cited by 74 publications

(59 citation statements)

References 26 publications

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“…However, our study, instead, suggests that it may be necessary to obtain innovative PTTs to improve the correlation with BP via novel sensors and/or waveform detections. Innovative sensors may include ballistocardiography 16 , seismocardiography 17 , 18 , wrist bioimpedance 19 , ultrasound 20 , and radar sensors 21 . Unlike ECG and PPG waveforms, these sensors may afford true PTT rather than dPTT or PAT.…”

Section: Discussionmentioning

confidence: 99%

Conventional pulse transit times as markers of blood pressure changes in humans

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Yavarimanesh

Natarajan

et al. 2020

Sci Rep

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Pulse transit time (PTT) represents a potential approach for cuff-less blood pressure (BP) monitoring. Conventionally, PTT is determined by (1) measuring (a) ECG and ear, finger, or toe PPG waveforms or (b) two of these PPG waveforms and (2) detecting the time delay between the waveforms. The conventional PTTs (cPTTs) were compared in terms of correlation with BP in humans. Thirty-two volunteers [50% female; 52 (17) (mean (SD)) years; 25% hypertensive] were studied. The four waveforms and manual cuff BP were recorded before and after slow breathing, mental arithmetic, cold pressor, and sublingual nitroglycerin. Six cPTTs were detected as the time delays between the ECG R-wave and ear PPG foot, R-wave and finger PPG foot [finger pulse arrival time (PAT)], R-wave and toe PPG foot (toe PAT), ear and finger PPG feet, ear and toe PPG feet, and finger and toe PPG feet. These time delays were also detected via PPG peaks. The best correlation by a substantial extent was between toe PAT via the PPG foot and systolic BP [− 0.63 ± 0.05 (mean ± SE); p < 0.001 via one-way ANOVA]. Toe PAT is superior to other cPTTs including the popular finger PAT as a marker of changes in BP and systolic BP in particular.

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Section: Discussionmentioning

confidence: 99%

Conventional pulse transit times as markers of blood pressure changes in humans

Block

Yavarimanesh

Natarajan

et al. 2020

Sci Rep

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“…Although PAT or PTT based approach for continuous BP monitoring has already shown remarkable progress through numerous studies [8,10,14,19,[21][22][23][24], it has not yet been widely accepted for ubiquitous NCBPM due to its limited accuracy. One of the reasons for this may be that PAT alone cannot fully reflect the complex BP dynamics and that conventionally measured PAT in ubiquitous BP monitoring involves PAT measured at peripheral arteries rather than central arteries.…”

Section: A Ppg Morphology Features As Predictors Of Bp In Ubiquitousmentioning

confidence: 99%

“…PAT is defined as the time difference between the R-peak of the electrocardiogram (ECG) and a point on distal pulse waveform such as the photoplethysmogram (PPG) measured at the fingertips. Although some studies have shown remarkable results in NCBPM using PAT and/or PTT methods [8,10,14,21,22], the results are still widely varied in terms of accuracy [19,23,24].…”

Section: Introductionmentioning

confidence: 99%

Estimation and Validation of Arterial Blood Pressure Using Photoplethysmogram Morphology Features in Conjunction With Pulse Arrival Time in Large Open Databases

Yang

Sohn

Lee

et al. 2021

IEEE J. Biomed. Health Inform.

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Although various predictors and methods for BP estimation have been proposed, differences in study designs have led to difficulties in determining the optimal method. This study presents analyses of BP estimation methods using 2.4 million cardiac cycles of two commonly used non-invasive biosignals, electrocardiogram (ECG) and photoplethysmogram (PPG), from 1376 surgical patients. Feature selection methods were used to determine the best subset of predictors from a total of 42 including PAT, heart rate (HR), and various PPG morphology features, and BP estimation models constructed using linear regression (LR), random forest (RF), artificial neural network (ANN), and recurrent neural network (RNN) were evaluated. 28 features out of 42 were determined as suitable for BP estimation, in particular two PPG morphology features outperformed PAT, which has been conventionally seen as the best non-invasive indicator of BP. By modelling the low frequency component of BP using ANN and the high frequency component using RNN with the selected predictors, mean errors of 0.05 ± 6.92 mmHg for systolic BP, and-0.05 ± 3.99 mmHg for diastolic BP were achieved. External validation of the model using another biosignal database consisting of 334 intensive care unit patients led to similar results, satisfying three standards for accuracy of BP monitors. The results indicate that the proposed method can contribute to the realization of ubiquitous non-invasive continuous BP monitoring.

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“…Although it is necessary to press the finger manually to apply the oscillometric principle, recent studies have shown potential to use smartphones as blood pressure monitors [34, 35]. Among the nonocclusive techniques, tonometry [36–38], pulse wave velocity (PWV) [39–50], and photoplethysmography (PPG) [51, 52] have been extensively studied and developed for ambulatory blood pressure monitoring (ABPM).…”

Section: Discussionmentioning

confidence: 99%

Current Status and Prospects of Health-Related Sensing Technology in Wearable Devices

Cho

2019

Journal of Healthcare Engineering

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The healthcare-related functions of wearable devices are very useful for continuous monitoring of biological information. Wearable devices equipped with communication function can be used for additional healthcare services. Among the wearable devices, the wristband type is most suitable for acquiring biological signals, and the wear preference of the user is high, so it is highly likely to be used more in the future. In this paper, the health-related functions of wristband were investigated and the technical limitations and prospects were also reviewed. Most current wristband-type devices are equipped with the combination of accelerometer, optical sensor, and electrodes for their health functions, and continuously measured data are expanding the possibility of discovering new medical meanings. The blood pressure measurement function without using cuff is the most useful and expected function among the health-related functions expected to be mounted on the wrist wearable device, in spite of its technical limits and difficulties.

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Ballistocardiogram-Based Approach to Cuffless Blood Pressure Monitoring: Proof of Concept and Potential Challenges

Cited by 74 publications

References 26 publications

Conventional pulse transit times as markers of blood pressure changes in humans

Conventional pulse transit times as markers of blood pressure changes in humans

Estimation and Validation of Arterial Blood Pressure Using Photoplethysmogram Morphology Features in Conjunction With Pulse Arrival Time in Large Open Databases

Current Status and Prospects of Health-Related Sensing Technology in Wearable Devices

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