Sormenpäämittarit

Sormenpäämittarit, often translated as fingertip sensors or finger sensors, are devices designed to measure physiological data from a fingertip. They are typically small, non-invasive instruments that can be worn or attached to a finger to collect information. The primary function of these devices is to monitor vital signs, most commonly heart rate and blood oxygen saturation levels.

These sensors usually employ photoplethysmography (PPG) technology. A light-emitting diode (LED) on one side of the fingertip emits light, which passes through the tissue. A photodetector on the opposite side measures the amount of light that is absorbed or reflected. The variations in light absorption, particularly in red and infrared wavelengths, correlate with changes in blood volume in the capillaries of the fingertip. These changes are then used to calculate heart rate and oxygen saturation (SpO2).

Sormenpäämittarit are widely used in medical settings, such as hospitals and clinics, for patient monitoring. They are also common in consumer electronics, integrated into smartwatches, fitness trackers, and other wearable devices for personal health tracking. Their ease of use and portability make them a convenient tool for both professional medical assessment and individual wellness monitoring. While generally accurate, the readings can sometimes be affected by factors such as improper placement, movement, and nail polish.