What is this used for and another else ..... ;p
A pulse oximetry sensor send light through patient tissue to receive on the other side of the sensor. As a figure shows, light emitting diodes transmit red and infrared light through peripheral areas of the body, such as finger.
As a photodetector positioned opposite the light emitting diodes compares light absorption before and after pulsation. The amount of light getting through reflects the blood flow in the arterioles. This measurement of light absorption during pulsation is translated into an oxygen saturation percentage and SpO2 value is displayed.
For accurate SpO2 measurements, the following conditions must apply :
- The patient must have perfusion in that extremity.
- The light emitter and the photodetector must be directly opposite each other.
- All of the light from the emitter must pass through the patient’s tissue.
- The sensor site should be free of vibration and excessive motion.
- Power cables should be kept away from the sensor cable and connector
If this happens, the following things may occur :
- When the amount of oxygen in the blood decreases, it may cause hypoxia (shortage of oxygen in the brain).
- Hypoxia can lead to the loss of consciousness (fainting).
- Lack of oxygen can occur, when the patient suffers from known heart and lung illnesses.
- Lack of oxygen can occur when there is an instant surge in the oxygen intake
And oximetry are is integrated with medical unit such as patient monitor or portable with bateray, also produced with disposable unit with material from adhesive vinyl usually.
For more reference you can look direct to link here :
- Some related circuit