Under , a pulse oximeter may not give accurate results.
In a hospital, perfusion index, along with many other parameters, is used to monitor critically ill patients.
You need to be aware of these limitations when interpreting the result.
However, Nihon Kohden suspended the development of pulse oximetry and did not apply for a basic patent of pulse oximetry except in Japan.
Oxygenated hemoglobin absorbs more infrared light and allows more red light to pass through.
What if Pi is high in my Pulse Oximeter? We focus from monitoring hemodynamic flow to monitoring peripheral perfusion in the early phase of critical illnesses and we might also need to consider the alternation of peripheral perfusion in clinical care setting.