Virtual Instrument for the Measurement of Haemo-dynamic Parameters Using Photoplethysmograph

Reddy, K. Ashoka; Bai, Jingang; George, Boby; Mohan, Naveen; Kumar, V. Jagadeesh

doi:10.1109/imtc.2006.328443

Cited by 17 publications

(9 citation statements)

References 10 publications

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“…If the light that is transmitted by the stream is detected, the sensor is called the Transmittance type of sensor whereas if the light that is reflected is detected, the sensor is termed as the Reflectance type of PPG sensor. It is this PPG signal that carries a lot of useful diagnostic information which needs to be explored to calculate the blood flow [6]. The proposed method involves acquisition of real time PPG signal from a reflectance type of optical sensor with two LED's of wavelengths 660nm (red) and 860nm (IR) as sources and OPT 101 as the optical detector.…”

Section: Overview Of Proposed Methdology For Measuring the Bloodmentioning

confidence: 99%

Application of photoplethysmography in blood flow measurement

Sangurmath¹,

Daimiwal²

2015

2015 International Conference on Industrial Instrumentation and Control (ICIC)

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Blood flow measurement has gained much importance over the years as it has a vital role to play in understanding the functionality of heart. There are many principles on which the blood flow measurements are based. This work aims at developing a non-invasive technique for measuring the blood flow using the optical sensors. Among the many optical sensors available, the photoplethysmography (PPG) sensors are capable of measuring blood volumetric changes in the subcutaneous vessels. The proposed method involves acquisition of a real time photoplethysmography (PPG) signal from a reflectance type of optical sensor designed and developed with light emitting diode (LED) as source and OPT 101 as the detector. After the acquisition, the signal is conditioned using appropriate circuitry. The conditioned signal is then displayed on to MATLAB via the microcontroller. The PPG signal so acquired will be analyzed on MATLAB in time domain to estimate the parameters related to heart like the stroke volume which is the area under the curve and the heart rate and thus calculate the blood flow/cardiac output. The proposed method of blood flow measurement is advantageous when compared to the traditional methods of measurement as this is a non-invasive technique and does not require any surgical intervention, it can be used to estimate the blood flow in subjects of different age groups, gender and infants as well. Keywords-photoplethysmography; optical sensor; blood flow; heart rate; stroke volume;cardiac output 2015 International Conference on Industrial Instrumentation and Control (ICIC) College of Engineering Pune, India. May 28-30, 2015 978-1-4799-7165-7/15/$31.00 ©2015 IEEE 929

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Section: Overview Of Proposed Methdology For Measuring the Bloodmentioning

confidence: 99%

Application of photoplethysmography in blood flow measurement

Sangurmath¹,

Daimiwal²

2015

2015 International Conference on Industrial Instrumentation and Control (ICIC)

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“…The pixel intensities of the extracted images are then normalized with respect to their mean as well as the average intensity of the selected portion of the control area. It has been observed earlier [7] that the outputs of the two channels vary widely in their intensities, owing to the large differences that exist between the extinction coefficients of blood at these two wavelengths. The normalized NIR and Red images are therefore separately amplified.…”

Section: A Hardwarementioning

confidence: 99%

Virtual instrument for assessing dermal perfusion

Mohan

Kumar

2009

2009 IEEE Intrumentation and Measurement Technology Conference

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Determining the extent of dermal perfusion is crucial in assessing the healing of chronic wounds, of the kind encountered in diabetic ulcers and burns. An automated, contactless, non-invasive means of analyzing the dermal perfusion in selected areas would be useful in this process. Such a technique is presented in this paper. It describes a virtual instrument developed for acquiring a series of visual and near infrared images of the affected area and subsequent off-line analysis and presentation of the results. The virtual instrument has been tested with satisfying results for stimulated dermal perfusion and inhibition.

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“…PPG technique is also employed extensively in the field of pulse oximetry [8], [9]. To obtain a PPG, a part of the body is illuminated with a monochromatic light source of wavelength .…”

Section: Introductionmentioning

confidence: 99%

A digital instrument for venous muscle pump test

Bhooma

Kokila

Jayanthi

et al. 2011

2011 IEEE International Instrumentation and Measurement Technology Conference

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Design and development of a prototype unit to measure venous refilling time (VRT) and muscle pump capacity (MPC) during a venous muscle pump test (VMPT) is presented here. Instead of normalizing the photo-plethysmo-graph (PPG), as is common in the VMPT instruments in vogue, a suitable signal processing technique that extracts a signal proportional only to the blood volume changes underneath the PPG sensor is employed. Apart from the measurement of VRT and MPC, the prototype unit also provides a measure on the pulse rate.

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Virtual Instrument for the Measurement of Haemo-dynamic Parameters Using Photoplethysmograph

Cited by 17 publications

References 10 publications

Application of photoplethysmography in blood flow measurement

Application of photoplethysmography in blood flow measurement

Virtual instrument for assessing dermal perfusion

A digital instrument for venous muscle pump test

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