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Water-Jet Surgical Units definition: Surgical units designed to perform surgery using jets of high-pressure water or water solutions (e.g., saline). The devices typically consist of a central console for pressurizing the liquid which includes controls and an operating switch (e.g., footpedal); a liquid-delivery system, including a pump, tubes, high-pressure nozzles, and a liquid container; and specialized handpieces (usually disposable) to apply the jet. Some units include a collecting system to capture the jet and debris. These surgical units perform resection without warming; they can also cut apart (i.e., dissect) certain tissues from other, such as liver tissue from vessels and muscle from fat. Water-jet surgical units can provide the desired tissue dissection either immersed in irrigation fluid or in air; some units are specialized for endoscopic and/or dermal procedures.
Water-Jet Surgical Units, Arthroscopic definition: Water-jet surgical units designed to perform endoscopic surgery in the articulations (i.e., arthroscopic). These units typically include an electrically powered central console for pressurizing the liquid (e.g., up to 30,000 psi) and a switch (e.g., footpedal) to control the operation; a liquid-delivery system, including a pump, tubes, high-pressure nozzles, and a liquid container; a waste hose for collecting the liquid and debris (e.g., excised tissue); and a set of specialized tools. Some tools are used for direct delivery of the jet; other tools (e.g., burs) use the high-pressure liquid as a power source to rotate turbine-driven mechanisms. Arthroscopic water-jet surgical units can cut, shape, and remove soft and hard tissue, including bone burring; they are used in a variety of arthroscopic procedures in small and large articulations.
 
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