Photoplethysmography (PPG) biosensors are integrated with smart wearables to measure heart rate, blood pressure, and blood oxygen saturation, among others. PPG is a noninvasive, low cost, and simple optical measurement technique used to measure physiological parameters. The use of PPG technology has grown rapidly, primarily due to its ease of use, wearing comfort, and cost-effectiveness for its consumers. PPG biosensors are more flexible that can be used in a wide range of applications, such as patches, rings, earbuds, and watches.
Photoplethysmography (PPG) biosensors are frequently used to take measurements at the skin’s surface in a non-invasive manner. They are widely used commercially in medical devices such as vascular diagnostics, pulse oximeters, and digital blood pressure measurement systems. PPG is a non-invasive technology that uses a photodetector and a light source at the surface of skin to measure the volumetric variations of blood circulation. The light source emits light to a tissue and the photodetector measures the reflected light from the tissue.
The reflected light is proportional to blood volume variations. Moreover, it is used to determine and register the variations in the blood flow, which occur at each heartbeat. Furthermore, PPG biosensors help detect cardio-vascular pulse wave that propagates through the body. Clinically, Photoplethysmography (PPG) biosensors are used to monitor the oxygen saturation, pulse rate, blood vessel stiffness, & blood pressure. Wearable unobtrusive Photoplethysmography (PPG) monitors are available commercially.
According to Coherent Market Insights, photoplethysmography (PPG) Biosensors Market to Surpass US$ 823.4 Million by 2028
Thus, with the increasing prevalence of cardiovascular diseases around the world, the use of PPG technology is also increasing with a rapid pace. For example, according to the Centers for Disease Control and Prevention (CDC), heart disease is the leading cause of death in the United States. One person dies every 36 seconds in the U.S. from cardiovascular disease. Advances in computer-based pulse wave analysis techniques have contributed to a resurgence of interest in the PPG technique in the recent years.