Signal Analysis in a New Optical Pulse Waveform Profiler for Cardiovascular Applications

Oliveira, Tatiana; Cabeleira, Manuel; Matos, Patrícia; Pereira, Helena; Almeida, Vânia; Borges, Elisabeth; Santos, Hélder; Pereira, Tânia; Cardoso, J. M. R.; Correia, C.M.B.A.

doi:10.2316/p.2011.738-067

Cited by 10 publications

(16 citation statements)

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“…The signals were stored for offline analysis by MATLAB ® [41,43]. Previously, a comparison test was carried out between an ultrasound image system GE Vivid e ® (30 Hz of sampling rate), as source of reference data, and the optical system with higher-resolution acquisition signals (20 kHz), adequate to feed feature extraction algorithms [40]. A large study was performed in 131 young subjects, and the results showed that the use of this new technique is a trustworthy method to determine pulse wave velocity (PWV) and for pulse waveform analysis [44,45].…”

Section: Measurement Systemmentioning

confidence: 99%

An automatic method for arterial pulse waveform recognition using KNN and SVM classifiers

Pereira

Paiva

Correia

et al. 2015

Med Biol Eng Comput

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Section: Measurement Systemmentioning

confidence: 99%

An automatic method for arterial pulse waveform recognition using KNN and SVM classifiers

Pereira

Paiva

Correia

et al. 2015

Med Biol Eng Comput

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“…This distension can be used to generate an optical signal correlated with the passing blood pressure wave. Several studies have shown that the distension waveform and the pressure waveform have an analogous wave contour and, therefore, can reciprocally be used for pulse wave analysis [16][17][18].…”

Section: Description Of the Optical Systemmentioning

confidence: 99%

“…Previously, a comparison test was carried out between an ultrasound image system GE Vivid e ® (30 Hz), as a source of reference data, and the optical sensors that allow a higher resolution (20 kHz), adequate to feed feature extraction algorithms [16]. The clinical use of these optical probes includes vast applications, as they provide enough resolution for features extraction with higher accuracy, and they are an inexpensive and a non-invasive diagnostic method for the detection and monitoring of the pressure wave profile.…”

Section: Description Of the Optical Systemmentioning

confidence: 99%

Pulse pressure waveform estimation using distension profiling with contactless optical probe

Pereira

Santos

Oliveira

et al. 2014

Medical Engineering & Physics

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The pulse pressure waveform has, for long, been known as a fundamental biomedical signal and its analysis is recognized as a non-invasive, simple, and resourceful technique for the assessment of arterial vessels condition observed in several diseases. In the current paper, waveforms from non-invasive optical probe that measures carotid artery distension profiles are compared with the waveforms of the pulse pressure acquired by intra-arterial catheter invasive measurement in the ascending aorta. Measurements were performed in a study population of 16 patients who had undergone cardiac catheterization. The hemodynamic parameters: area under the curve (AUC), the area during systole (AS) and the area during diastole (AD), their ratio (AD/AS) and the ejection time index (ETI), from invasive and non-invasive measurements were compared. The results show that the pressure waveforms obtained by the two methods are similar, with 13% of mean value of the root mean square error (RMSE). Moreover, the correlation coefficient demonstrates the strong correlation. The comparison between the AUCs allows the assessment of the differences between the phases of the cardiac cycle. In the systolic period the waveforms are almost equal, evidencing greatest clinical relevance during this period. Slight differences are found in diastole, probably due to the structural arterial differences. The optical probe has lower variability than the invasive system (13% vs 16%). This study validates the capability of acquiring the arterial pulse waveform with a non-invasive method, using a non-contact optical probe at the carotid site with residual differences from the aortic invasive measurements.

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“…This affects the artery compliance and therefore the distension waveform characteristics, allowing the determination of the risk of cardiovascular diseases [1].…”

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confidence: 99%

“…Information on the interaction between the left ventricle ejection and the physical properties of the arterial circulation can be determined by the descriptive and quantitative analysis of the arterial pulse pressure waveform [1].…”

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Development of optical probes for arterial pulse wave assessment

Oliveira

Correia

2012

2012 IEEE 2nd Portuguese Meeting in Bioengineering (ENBENG)

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Three optical probes based on different photo-diodes: lateral effect (LEP), planar (PPD) and avalanche (APD) photodiodes, were developed to measure the arterial pressure waveform and access clinically relevant information. The pressure wave propagates through the arterial tree and is measured in the peripheral arteries.The probes were evaluated in dedicated test setups and in vivo, at the carotid. For the PPD and APD probes, an ultrasound system was used as a source of data for comparison. Two different light sources were tested: visible and infrared, which performance was evaluated in a test setup, simulating the fatty deposits seen in the obese.Although the LEP probe lacks of temporal resolution, PPD and APD probes show a good overall performance, measuring waveforms with <8% error, with higher resolution than the ultrasound system. The probes lit with infrared light show better resolution and definition in the test setup and at in vivo conditions.

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Signal Analysis in a New Optical Pulse Waveform Profiler for Cardiovascular Applications

Cited by 10 publications

References 0 publications

An automatic method for arterial pulse waveform recognition using KNN and SVM classifiers

An automatic method for arterial pulse waveform recognition using KNN and SVM classifiers

Pulse pressure waveform estimation using distension profiling with contactless optical probe

Development of optical probes for arterial pulse wave assessment

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