Is pulse transit time a good indicator of blood pressure changes during short physical exercise in a young population?

Proença, Jorge; Muehlsteff, Jens; Aubert, Xavier L.; Carvalho, Paulo

doi:10.1109/iembs.2010.5626627

Cited by 73 publications

(53 citation statements)

References 11 publications

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“…Proença et al estimated SBP with this mathematical model Equation (6) using both PTT and PAT [82]. They determined PTT from two PPG sensors placed at the earlobe and at a finger, and PAT with PEP adjustment using the impedance cardiogram.…”

Section: Logarithmic Modelmentioning

confidence: 99%

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Cuff-Less and Continuous Blood Pressure Monitoring: A Methodological Review

et al. 2017

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Blood pressure (BP) is one of the most important monitoring parameters in clinical medicine. For years, the cuff-based sphygmomanometer and the arterial invasive line have been the gold standards for care professionals to assess BP. During the past few decades, the wide spread of the oscillometry-based BP arm or wrist cuffs have made home-based BP assessment more convenient and accessible. However, the discontinuous nature, the inability to interface with mobile applications, the relative inaccuracy with movement, and the need for calibration have rendered those BP oscillometry devices inadequate for next-generation healthcare infrastructure where integration and continuous data acquisition and communication are required. Recently, the indirect approach to obtain BP values has been intensively investigated, where BP is mathematically derived through the "Time Delay" in propagation of pressure waves in the vascular system. This holds promise for the realization of cuffless and continuous BP monitoring systems, for both patients and healthy populations in both inpatient and outpatient settings. This review highlights recent efforts in developing these next-generation blood pressure monitoring devices and compares various mathematical models. The unmet challenges and further developments that are crucial to develop "Time Delay"-based BP devices are also discussed.

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Section: Logarithmic Modelmentioning

confidence: 99%

“…Here, a and b are subject-specific constants and they can be obtained through a regression analysis between the reference BP and the corresponding "Time Delay" [82]. Proença et al estimated SBP with this mathematical model Equation (6) using both PTT and PAT [82].…”

Section: Logarithmic Modelmentioning

confidence: 99%

Cuff-Less and Continuous Blood Pressure Monitoring: A Methodological Review

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Although many studies have previously shown that PTT is capable of predicting changes in BP and vascular tone over a short period of time, its reliability as a marker for cardiovascular risks, its inverse relation to beat-to-beat blood pressure, and the accuracy of the methods used to calculate PTT are often questioned and are still being investigated [8], [9]. Also, the relative changes in PTTs measured from multiple sites simultaneously in response to a raise in BP has not been investigated previously.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Pulse Transit Times utilizing multisite reflectance photoplethysmography under conditions of artificially induced peripheral vasoconstriction

Budidha

Kyriacou

2014

2014 36th Annual International Conference of the IEEE Engineering in Medicine and Biology Society

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“…The ICG target proximal point is the ICG-B point, which indicates the opening of the aortic valve. The ICG-B point is however difficult to locate in individual cycles in ICG signals recorded during activity [21]. In this work, we have chosen an approach were the B-point is estimated based on the time gap (in ms) between the ECG-R wave and the ICG-C peak (the maxima on the ICG curve), TRC.…”

Section: B Calculation Of Pulse Transit Timementioning

confidence: 99%

“…We have considered an averaged PPT value, and, assuming the error in B detection had a random component, we found that the averaging decreased the error. A change in mean blood pressure of 10 mmHg is expected to give a change in PTT of about 8ms-16ms [21]. Their calculations were based on PTT values in the range 100ms to 200ms.…”

Section: B Calculation Of Pulse Transit Timementioning

confidence: 99%

A Novel Method for Continuous, Noninvasive, Cuff-Less Measurement of Blood Pressure: Evaluation in Patients With Nonalcoholic Fatty Liver Disease

Seeberg

Orr

Opsahl

et al. 2017

IEEE Trans. Biomed. Eng.

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Abstract-Objective: One promising approach for a continuous, non-invasive, cuff-less ambulatory BP monitor is to measure the pulse wave velocity or the inversely proportional pulse transit time (PTT), based on electrical and optical physiological measurements in the chest area. A device termed IsenseU-BP+ has been developed for measuring continuous BP, as well as other physiological data. The objective of this paper is to present results from the first clinical evaluation with a wide range of patients. The study was set up to verify whether IsenseU-BP+ can be used to measure raw signals with sufficient quality to derive PTT. Methods: The test protocol, run 23 times on 18 different patients with non-alcoholic fatty liver disease, includes both supine measurement at rest as well as measurements during indoor cycling. Changes in PTT were compared with the BP changes measured using validated reference sensors. Results: IsenseU-BP+ measured signals with good quality during rest on 17 of 18 patients despite the high diversity in age, body shape and BMI. Evaluation during cycling was difficult due to a lack of good reference measurements. Conclusion: IsenseU-BP+ measures PTT with high quality during supine rest and exercise and could therefore be suitable for deriving non-invasive continuous BP, although evaluation during exercise was limited due to inaccurate reference BP measurements. Significance: Continuous, non-invasive measurement of BP would be highly beneficial in a number of clinical settings. Systems currently considered gold-standard for the investigation of hypertension carry considerable limitations which could be overcome by the method proposed here.Index Terms-cuff-less blood pressure, pulse transit time, pulse wave velocity, unobtrusive sensing, hypertension

show abstract

Is pulse transit time a good indicator of blood pressure changes during short physical exercise in a young population?

Cited by 73 publications

References 11 publications

Cuff-Less and Continuous Blood Pressure Monitoring: A Methodological Review

Cuff-Less and Continuous Blood Pressure Monitoring: A Methodological Review

Investigation of Pulse Transit Times utilizing multisite reflectance photoplethysmography under conditions of artificially induced peripheral vasoconstriction

A Novel Method for Continuous, Noninvasive, Cuff-Less Measurement of Blood Pressure: Evaluation in Patients With Nonalcoholic Fatty Liver Disease

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