Facts About CMS Pulse Oximeters

By Madeline Pittman


CMS pulse oximeters are pieces of equipment used to perform pulse oximetry. This kind of oximetry is a non-invasive technique for monitoring the level of saturation of Oxygen gas in the body. This equipment was first invented by a physician called Glenn Allan Millikan in 1940s. This first device operated on two wavelengths and was placed on the ear. The two wavelengths were red and green filters.

This original product was improved later on in 1949 by a physician named Wood. Wood added a capsule for compressing blood out of ears to obtain nil setting in the attempt to obtain absolute O2 saturation levels. The current makes function on similar principals like the initial one. However, the functioning principal was hard to implement in first makes because of unstable photocells and/or light sources.

Oximetry itself was developed in the year 1972 at Nihon Kohden by 2 bioengineers, Takuo and Michio. These two bioengineers used the ratio between infrared and red light absorption of pulsating parts at measuring sites. A corporation called Biox did the first distribution of oximeter on large scale in the year 1981. By then, the appliance was chiefly utilized in operating rooms and corporations that manufactured it aligned most of their funds and advertising in this direction.

Oximetry is a very crucial noninvasive way of determining the level of oxygen in the human body. It uses a pair of tiny light emitting diodes that face a photodiode through a translucent part of the body. Such translucent parts include fingertips, toe tips, and earlobes. One LED is red while the other one is infrared. The infrared LED is normally 940, 910, or 905 nm while the red one is usually 660 nm.

The absorption speed of the 2 wavelengths differs between oxygenated and deoxygenated versions of oxygen in human body. This disparity in rate of absorption may be utilized to gauge the ratio between de-oxygenated and oxygenated blood oxygen. The indicated signal is changed over time with each heartbeat since arterial blood veins constrict and expand with each passing heartbeat. The monitors are capable of assuming other tissues or makeup on nails by monitoring the varying portion of absorption spectrum alone.

By observing the varying absorption section alone, the blood oxygen monitor only displays the percentage of arterial hemoglobin in oxyhemoglobin configuration. Patients without COPD but with hypoxic drive issues have a reading that ranges between 95 and 99 percent. Those with hypoxic drive issues normally have values that range between 88 and 94 percent. Usually figures of 100 percent may suggest carbon monoxide poisoning.

An oximeter is helpful in a number of environments and applications where the oxygenation of an individual is unstable. Some of the main environments of application consist of intensive care units, hospital and ward settings, surgical rooms, cockpits in un-pressurized aircrafts, and recovery units. The drawback of these appliance is that it only measures the level of saturation of hemo-globin and not ventilation. Therefore it is not a complete estimation of respiratory adequacy.

CMS pulse oximeters come in many varieties. Some are cheap costing a few dollars while others are very complex and expensive. They can be obtained from any store that deals with such pieces of equipment.




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