Development of a Two-Channel Simultaneous Photoplethysmography Recording System

Kim Soon Chong; Kok Beng Gan; Mohd. Ali Mohd. Alauddin

doi:10.5614/itbj.ict.2012.6.2.5

Authors

Kim Soon Chong Department of Electrical, Electronic & Systems Engineering, Faculty of Engineering & Built Environment, University Kebangsaan Malaysia, 43600 UKM Bangi, Malaysia.
Kok Beng Gan Institute of Space Science, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Malaysia
Mohd. Ali Mohd. Alauddin Department of Electrical, Electronic & Systems Engineering, Faculty of Engineering & Built Environment, University Kebangsaan Malaysia, 43600 UKM Bangi, Malaysia. Institute of Space Science, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Malaysia

DOI:

https://doi.org/10.5614/itbj.ict.2012.6.2.5

Abstract

Multi-site photoplethysmograph (PPG) recording enables researchers to study the vascular and hemodynamic properties of human subjects. Currently, there is no commercial system available in the market to perform either one channel or multi-channel PPG recording. PPG is an optoelectronic technique that measures changes in blood volume associated with cardiac contraction. The measurements can be obtained from fingertips, ear lobes and toes due to their low absorption and high degree of vasculature. The main objective of this project is to develop a two-channel simultaneous PPG recording system to acquire PPG signals from two different physiological sites using a Nellcor equivalent PPG probe. MATLAB software was used during the development phase to ensure rapid prototyping. The experiment results show that there was no inter -channel delay in the developed two-channel PPG system. Our preliminary results show that the delays between the left and the right arm were from 4 to 12 ms in three healthy random subjects. The system is portable, powered by universal serial bus (USB) and allows the user to do the PPG data acquisition in a clinical setting.

Downloads

Download data is not yet available.

References

Zahedi, E., Chellappan, K., Mohd Alauddin, M.A. & Singh, H, Analysis of the Effect of Ageing on Rising Edge Characteristics of the Photoplethysmogram using a Modified Windkessel Model, Cardiovascular Engineering, 7, pp. 172-181, 2009.

Allen, J., Overbeck, K., Stansby, G. & Murray, A, Photoplethysmography Assessments in Cardiovascular Disease, Measurement Control, 39, pp. 80-83, 2006.

Allen, J., Oates, C.P., Lees, T.A. & Murray, A., Photoplethysmography Detection of Lower Limb Peripheral Arterial Occlusive Disease: A Comparison of Pulse Timing, Amplitude and Shape Characteristics, Physiological Measurement, 26, pp. 811-821, 2005.

Allen, J. & Murray, A., Age-Related Changes in Peripheral Pulse Shape Characteristics at Various Body Sites, Physiological Measurement, 24, pp. 297-307, 2003.

World Health Organization, Cause of death in Malaysia, Geneva: WHO, 2009.

Laurent, S., Boutouyrie, P., Asmar, R., Gautier, I., Laloux, B., Guize, L. Ducimetiere, P. & Benetos, A., Aortic Stiffness is An Independent Predictor of All-Cause and Cardiovascular Mortality in Hypertensive Patients, Hypertension, 37, pp.1236-1241, 2011.

Oliver, J.J. & Webb, D.J., Noninvasive Assessment of Arterial Stiffness and Risk of Atherosclerotic Events, Arterioscler Thromb Vasc. Biol., 23, pp. 554-566, 2003.

Bronzino, J.D, The Biomedical Engineering Handbook, 1, Florida: CRC Press LLC, 2000.

Bhattacharya, P.P., Kanjilal & Muralidhar, V., Analysis and Characterization of Photoplethysmographic Signal, IEEE Transsaction of Biomedical Engineering, 48, pp. 5-11, 2001.

Allen, J. & Murray, A., Variability of Photoplethysmography Peripheral Pulse Measurements at The Ears, Thumbs and Toes, IEEE Proceeding Science and Technology, 147(6), pp. 403-407, 2000.

Allen, J., Photoplethysmography and Its Application in Clinical Physiological Measurement, Physiological Measurement, 28, R1, 2007.

Allen, J. & Murray, A., Similarity in Bilateral PhotoplethysmographicPeripheral Pulse Wave Characteristics at The Ears Thumbs and Toes, Physiological Measurement, 21, pp. 369-377, 2000.

Spigulis, J., Erts, R., & Ozols, M., Optical Multi-Channel Monitoring of Skin Blood Pulsations for Cardiovascular Assessment, SPIE Proc Advanced Biomedical and Clinical Diagnostic Systems, 5318, p.133-139, 2004.

Erts, R., Spigulis, J., Kukulis, I., & Ozols, M., Bilateral Photoplethysmography Studies of The Leg Arterial Stenosis, Physiological Measurement, 26, pp. 865-874, 2005.

Zahedi, E. & Mohd. Ali, M.A., Dual-Channel Photoplethysmography Synchronization Using A Barker Sequence, Conference Procedings IEEE Engineering in Medicine and Biology Society, 2, pp. 1952-1955, 2005.

Spigulis, J., Venckus, G. & Ozols, M., Optical Sensing for Early Cardiovascular Diagnostic, Proceedings SPIE, 3911, pp. 27-31, 2000.