The perfusion index (PI) measures how well blood circulates in a specific part of your body. The perfusion index does that using a comparison of the amount of oxygen-carrying blood in the area vs. the volume of blood not carrying oxygen.
The same capability that lets a pulse oximeter calculate blood oxygen also helps with the perfusion index. Measuring how much hemoglobin has oxygen makes it possible to measure how much new blood (which still carries oxygen) is flowing through the area in question.
The peripheral perfusion index is one way this principle helps healthcare providers assess and treat someone who may be sick. Lower numbers mean either your heart isn’t pumping enough blood, or something is making it harder for enough blood to reach parts of your body furthest from your heart.
Low perfusion performance refers to the ability of an oximeter to accurately measure blood oxygen levels under conditions of poor perfusion. Perfusion refers to the pulsation strength of human arterial blood. When the pulsation strength is low, so-called poor perfusion, it can be challenging to obtain accurate blood oxygen measurements. This often occurs in conditions of poor peripheral circulation, such as cold hands in winter, special test sites, surgical procedures, and special populations (neonates).
Poor perfusion presents a significant challenge to blood oxygen measurements, as these measurements rely on detecting the pulse signal, which is then analyzed by an algorithm. When perfusion is low, the pulse signal becomes fainter, making it more difficult to detect. Therefore, low perfusion performance indicates how effective the oximeter is in measuring blood oxygen levels when the pulse strength is low.
Our technology's capability to accurately measure blood oxygen at a perfusion index as low as 0.025% demonstrates superior low perfusion performance. We validate this performance using a blood oxygen simulator.
Pulse Oximeters have known to be used for the measurement of oxygen saturation in arterial blood. Perfusion Index (PI) derived from pulse oximetry represents a measure of peripheral perfusion that can be measured continuously and noninvasively. PI is values range from 0.02% (Poor PI) to 20% (Strong PI). The higher the PI value, the better the peripheral blood circulation, and the lower the PI value, the worse the peripheral blood circulation.
Currently, only Masimo can achieve a low perfusion detection level of 0.025%, and we are the second company to achieve this level of technology. While many finger clip pulse oximeter manufacturers have a normal perfusion range of 0.3%, our advanced technology ensures accurate readings within ±2% even at much lower perfusion levels of 0.025%.
Post time: Dec-12-2024
