Authors: U.M. Chaskar, S.R. Koli, S.L. Patil
Addresses: Department of Instrumentation and Control, College of Engineering, Wellesly Road, Shivajinagar, Pune 411 005, Maharashtra, India. ' Department of Medical Electronics, V.P.M.'S Polytechnic, Thane 400601, Maharashtra, India. ' Department of Instrumentation and Control, College of Engineering, Wellesly Road, Shivajinagar, Pune 411 005, Maharashtra, India
Abstract: An attempt is made to design a technique for determining total haemoglobin concentration, by wavelength selection and algorithm. A model is based on the difference in optical density induced by the pulsation of the heart beat, by assuming that, the variation of blood vessel size is small during arterial pulsing. A device is constructed with two Light Emitting Diodes (LEDs), and light source of 590 nm and 525 nm wavelength. The selected wavelengths are isosbestic points. Clinical data of patients are collected from pathology laboratory, which is used for determining the correlation between the absorption of light through finger and actual haemoglobin count.
Keywords: non-invasive measurement; total haemoglobin concentration; near infrared; isosbestic points; optical density; heart beat; arterial pulsing; light absorption; healthcare technology.
International Journal of Healthcare Technology and Management, 2010 Vol.11 No.3, pp.193 - 201
Published online: 12 Jul 2010 *Full-text access for editors Access for subscribers Purchase this article Comment on this article