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In the filtration system for the Surgifresh Turbo smoke evacuator, the removal of the particulate matter and odors found in laser plume or surgical smoke occurs in two filter stages. In the first filtration stage, the replaceable prefilter removes particles down to 0.1 microns at 99.9995% efficiency, thus capturing a large percentage of the particulate matter. In the second filtration stage, the primary ULPA filter removes the remaining particles as well as the odors and gases associated with surgical smoke plume. The primary benefit to removing the surgical smoke in two filtration stages is that the prefilter ensures the optimum performance and useful life of the more expensive ULPA filter used with the smoke evacuator.
Surgimedics prefilters are also designed to provide visual indication that the prefilter needs to be replaced. When you notice that the top layer of the filter media is covered with dark brown or black sediment, it is time to change the smoke evacuator's prefilter. The useful life of a Surgimedics prefilter is normally three to five procedures. All prefilters are easily replaced, which can be quickly done during a procedure if necessary.
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