Article Details

2017 | April-June | Issue2
Photoplethysmography and Its Clinical Application
Ghanshyam D Jindal, Aparna S Lakhe, Jyoti V Jethe, Sadhana A Mandlik, Rajesh K Jain, Vinnet Sinha, Alaka Deshpande


Photoplethysmography (PPG), introduced in 1937, is routinely used for monitoring heart rate, blood perfusion and oxygen saturation of the blood in the intensive care units for the past several decades. It is also being used for the assessment of peripheral blood flow and venous filling time in noninvasive vascular laboratories. It works on the principle of light/infrared absorption in the body segment and detection and processing of transmitted light/infrared radiation.
In the past few decades, there has been more emphasis on the pulse morphology. Analysis of higher harmonic components and derivation of cardiovascular indices have emerged as powerful tools for the assessment of arterial aging, endothelial function, and vascular compliance. The ease of operating and extreme low cost of PPG system has made it ideal for objective assessment of autonomic nervous system (ANS). This technique is presently being explored for the personal monitoring of blood glucose noninvasively.

Keywords: Digital blood flow, Endothelial function, Heart rate variability, Photoplethysmography, Stiffness index, Venous filling time.

How to cite this article: Jindal GD, Lakhe AS, Jethe JV, Mandlik SA, Jain RK, Sinha V, Deshpande A. Photoplethysmography and Its Clinical Application. MGM J Med Sci 2017;4(2):89-96.

Source of support: Board of Research in Nuclear Sciences, Atomic Energy Department, Government of India, Bhabha Atomic Research Centre (BARC), Mumbai - 400085, India.

Conflict of interest: None

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