What Is Medical Finger Pulse Oximeter?

2020/06/05

Medical Finger Pulse Oximeter, as the name implies, refers to an instrument for measuring blood oxygen. Hypoxic patients should use Medical Finger Pulse Oximeter for a long time to detect blood oxygen content, which can effectively prevent the occurrence of danger. If hypoxia occurs, oxygen supplement immediately, greatly Reduce the chance of disease onset.

 

Principle of Medical Finger Pulse Oximeter:

Medical Finger Pulse Oximeter uses Lambert Beer's law to establish an empirical formula for data processing based on the absorption spectrum characteristics of reduced hemoglobin and oxyhemoglobin in the red and near-red light regions. Using photoelectric blood oxygen detection technology combined with volume pulse plethysmography technology, two beams of light with different wavelengths (red light at 660nm and near infrared light at 940nm) are used to illuminate the nail tip of the human body through a pincer finger sensor, and the measurement signal is acquired by the photosensitive element. After the obtained information is processed by the electronic circuit and the microprocessor, the measured results are displayed by two groups of LEDs.

Composition of Medical Finger Pulse Oximeter

microprocessor, memory (EPROM and RAM), two digital-to-analog converters that control the LED, a device that filters and amplifies the signal received by the photodiode, and an analog-to-digital converter that digitizes the received signal to provide to the microprocessor . The LED and photodiode are placed in a small probe that comes in contact with the patient's fingertip or earlobe. Medical Finger Pulse Oximeter also generally includes small liquid crystal displays.