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Instrument with an optical system. Used for microinvasive diagnosis or surgery to examine body cavities, hollow organs or joints. A distinction is made between rigid and flexible endoscopes. Rigid endoscopes transmit the image of the examined object to the eyepiece through a lens system within the endoscope shaft. The necessary light to illuminate the object under inspection is transmitted to the tip of the endoscope via a fibre-optic light guide, which is also in the shaft. With flexible endoscopes, image and light are transmitted via a fibre-optic bundle. Generally, the instruments have working channels allowing the insertion of micromechanical devices such as forceps and sampling accessories.
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Reprocessing of endoscopes and their accessory instruments must be carried out in accordance with the joint recommendation of the Commission for Hospital Hygiene and Infection Prevention at the Robert Koch-Institute (RKI) and the Federal Institute for Drugs and Medical Devices (Hygienic requirements for the reprocessing of medical devices).