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operating theater
An operating theater, also known as an operating theatre, operating room (OR) or operating suite, is a facility within a hospital where surgical operations are carried out in a sterile environment. Historically, the term "operating theatre" referred to a non-sterile, tiered theater or amphitheater in which students and other spectators could watch surgeons perform surgery.
==History==
Operating theatres had a raised table or chair of some sort at the center for performing operations, and were surrounded by several rows of seats (operating theatres could be cramped or spacious) so students and other spectators could observe the case in progress. The surgeons wore street clothes with an apron to protect them from blood stains, and they operated bare-handed with unsterilized instruments and supplies (gut and silk sutures were sold as open strands with reusable, hand-threaded needles; packing gauze was made of sweepings from the floors of cotton mills). In contrast to today's concept of surgery as a profession that emphasizes cleanliness and conscientiousness, at the beginning of the 20th century the mark of a busy and successful surgeon was the profusion of blood and fluids on his clothes.
In 1884 German surgeon Gustav Neuber implemented a comprehensive set of restrictions to ensure sterilization and aseptic operating conditions through the use of gowns, caps, and shoe covers, all of which were cleansed in his newly invented autoclave. In 1885 he designed and built a private hospital in the woods where the walls, floors and hands, arms and faces of staff were washed with mercuric chloride, instruments were made with flat surfaces and the shelving was easy-to-clean glass. Neuber also introduced separate operating theaters for infected and uninfected patients and the use of heated and filtered air in the theater to eliminate germs. In 1890 surgical gloves were introduced to the practice of medicine by William Halsted. Aseptic surgery was pioneered in the United States by Charles McBurney.
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