jeudi 25 juin 2015

Functions Of An Oxygen Membrane

By Ruthie Calderon


All operations are risky and can mean life or death to the patient. A wide array of equipment is used to make sure operations go well, one being the oxygen membrane. These put oxygen into the patient's blood and take out carbon dioxide while their lungs are not working. The device makes it possible for many patients to have a long life and enjoy what life has to offer. This is because of the way and manner the device functions. It is very good to use on human beings and this article seeks to let you know more about the history, advantages, and functions.

There are two approaches made by this device. First is to imitate breathing like how a lung works in cardio pulmonary bypass and to put in more oxygen outside the patient's control or body to lengthen his life. This is also called extracorporeal membrane oxygenation.

Oxygen membranes contain a thin, penetrable layer which gas and blood go through separately. This colourless, odourless reactive gas is dispelled in a circuit and enters the blood. In the meantime the blood expels carbon dioxide.

In the mid 1880s, the first artificial lung was a rotating disk oxygenator where blood was simply exposed to the oxygen in the atmosphere. This posed the danger of blood clotting and foaming. Once blood becomes this state, it cannot be brought back to the patient's arteries for we will die.

Research continued for many years which included animal testing. The premium new design in 1953 was used for a successful pulmonary bypass. Here a thin film of blood was allowed to access this gas as it passed through steel layers.

From the 1950s to 1980s, disposable bubble oxygenators were commonly used in the majority of hospitals. Those that were not disposable were very hard to keep clean. Many times demand for these devices was so high that the staff had to clean it very quickly and well for the next patient in a very short space of time.

This is most especially true in the United States. It is at par with the other types of oxygenators in terms of oxygenating liters of blood. However, it is more favored because it only needs a smaller volume of blood for preparation or for the device to function with the sufficient rate of gas transfer. Because of this, there was less blood trauma. It functions closer or most similar to the natural lung.

Originally these devices were made from polyethylene or Teflon, which are not penetrable. So enhancements were made and silicone rubber membranes were used as an alternative, which are very absorbent. This proved to show a major gain in patients' blood quality.

These days in quick cardiopulmonary operations, porous hollow fiber members are used. While in operations of a longer duration, membranes without pores tend to be used. The use of pores or not affects how long the blood is exposed to oxygen. This must be controlled so the body functions normally after the operation.

Research continues into preferences for bubble oxygenators or membrane oxygenators; the result is likely to be found out and made know to the general public and surely it is expected to be a good one. It is also worth mentioning that the cost of each is roughly the same due to technological advances. Membrane oxygenators are still the most popular for cardiopulmonary bypass operations in the developed world.




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