Difference in Pulse Arrival Time at Forehead and at Finger as a Surrogate of Pulse Transit Time

Lázaro, Jesús; Bailón, Raquel; Laguna, Pablo; Marozas, Vaidotas; Rapalis, Andrius; Gil, Eduardo

doi:10.22489/cinc.2016.079-432

Cited by 6 publications

(12 citation statements)

References 11 publications

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“…This Mayer wave, being very powerful at forehead but not at finger, are reflected in the PTTD as a consequence. A similar finding was obtained in [3] for 14 subjects that performed a tilt-table test. During tilt stage, the power in the LF band at forehead was substantially increased with respect to the one at finger, thus in the LF power of the PTTD.…”

Section: Discussionsupporting

confidence: 85%

“…Actually, the PTTD has already been reported in the literature as a measure correlated with the PTT [3,5]. In addition, results in [3] showed higher correlation between PTTD and PAT during rest stages than during tilt stage, when the PEP dynamics have stronger effect in PAT dynamics. In this work, changes in PTTD during accute mental stress are studied in order to assess the potential of PTTD as stress detector.…”

Section: Introductionmentioning

confidence: 65%

“…However, the use of PAT as PTT surrogate is limited since it includes the pre-ejection period (PEP) [3]. The PEP is defined as the time between the ventricular depolarization and the opening of the aortic valve, that varies beat-to-beat and uncorrelates the PAT-based blood pressure estimation in the current techniques [4].…”

Section: Introductionmentioning

confidence: 99%

“…It can be estimated as the difference between two PATs, or as the time between the pulse occurrence in a PPG signal and the pulse occurrence in a second PPG signal recorded in another place of the body [5]. Actually, the PTTD has already been reported in the literature as a measure correlated with the PTT [3,5]. In addition, results in [3] showed higher correlation between PTTD and PAT during rest stages than during tilt stage, when the PEP dynamics have stronger effect in PAT dynamics.…”

Section: Introductionmentioning

confidence: 99%

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Cardiovascular Changes Induced by Acute Emotional Stress Estimated from the Pulse Transit Time Difference

Armañac¹,

Kontaxis²,

Lázaro³

et al. 2019

2019 Computing in Cardiology Conference (CinC)

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In the present work, the difference between arrival times of photoplethysmographic (PPG) pulses from two different sites of the arterial tree (PTTD) is calculated. As the PTTD is considered to be related with arterial pulse wave velocity, an evaluation of it's usefulness to identify states of acute mental stress is performed. A subset of fourteen healthy volunteers undergoing a stress protocol was analysed and a statistical test was carried out to evaluate the validity of the proposed method. The results showed that the standard deviation of the PTTD had sufficient statistical capacity to discern between states of stress and relaxation. Furthermore, a generalised descending trend of the mean PTTD can be seen from relaxation to stress.

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Section: Discussionsupporting

confidence: 85%

Section: Introductionmentioning

confidence: 65%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Cardiovascular Changes Induced by Acute Emotional Stress Estimated from the Pulse Transit Time Difference

Armañac¹,

Kontaxis²,

Lázaro³

et al. 2019

2019 Computing in Cardiology Conference (CinC)

Self Cite

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“…An alternative to CTA may become PPG technology, which is non-invasive, safe for the patient, cheap and easily available [15]. Yali Zheng et al [22], in their research on PAD diagnostics, focused on one of the characteristics that can be read by means of ECG and PPG -pulse arrival time (PAT). PAT is the time that elapses between the appearance of the R waveform in ECG and the detection of a pulse wave by a sensor placed above one of the peripheral arteries [22].…”

Section: Current Application Of Photoplethysmography In Angiology Diamentioning

confidence: 99%

The latest applications of photoplethysmography

et al. 2019

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The development of medicine and the ability to conduct effective therapy in increasingly severe cases create the need to develop new methods of continuous and non-invasive monitoring of the patient's condition. One of the techniques that is widely used in many fields of medicine is photoplethysmography (PPG). The analysis of the latest research indicates that PPG can have much more applications than the measurement of heart rate and arterial saturation of the patient-as shown by the latest research, it can be used in the measurement of many other key parameters. The optimism is the multitude of areas in which PPG monitoring is attempted. There are more and more attempts to use photoplethysmography in diagnosis and evaluation of peripheral vascular diseases, assessment of circulation in diabetic patients and assessment of endothelial function. Authors are focusing on new applications of PPG, its advantages and limitations. Most of them agree that PPG can provide useful knowledge about the patient's condition while being a quick, easy-to-use and cost-effective technique. The following review was created to critically analyze the latest technical developments and uses of PPG in clinical practice. Sources for the following article were found using the PubMed database using keywords such as "photoplethysmography", "oxygen saturation" and "pulse oximeter".

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A flexible organic reflectance oximeter array

Khan

Han

Pierre

et al. 2018

Proc. Natl. Acad. Sci. U.S.A.

229

265

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SignificanceThe optical method to determine oxygen saturation in blood is limited to only tissues that can be transilluminated. The status quo provides a single-point measurement and lacks 2D oxygenation mapping capability. We use organic printed optoelectronics in a flexible array configuration that senses reflected light from tissue. Our reflectance oximeter is used beyond conventional sensing locations and accurately measures oxygen saturation on the forehead. In a full system implementation, coupled with a mathematical model, we create 2D oxygenation maps of adult forearms under pressure-cuff–induced ischemia. Our skin-like flexible sensor system has the potential to transform oxygenation monitoring of tissues, wounds, skin grafts, and transplanted organs.

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Difference in Pulse Arrival Time at Forehead and at Finger as a Surrogate of Pulse Transit Time

Abstract: Pulse transit time (PTT)

Cited by 6 publications

References 11 publications

Cardiovascular Changes Induced by Acute Emotional Stress Estimated from the Pulse Transit Time Difference

Cardiovascular Changes Induced by Acute Emotional Stress Estimated from the Pulse Transit Time Difference

The latest applications of photoplethysmography

A flexible organic reflectance oximeter array

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