A casing for a tube of a medical endoscopic device, comprising an elongated tubular element and adapted to be put on top of the tube of a medical endoscopic device, the casing extending along at least a portion of the length of the distal end of the tube, while the tubular element contains an inner surface, at least a portion of which captures the tube and holds the casing in place, and the outer surface, which contains many offset from each other protruding elements having a tip and base, to which are arranged to move between the resting position and the position in which the tip of the protruding element is essentially parallel to the longitudinal axis of the medical endoscopic device, and the position in which it is at an angle approximately perpendicular to the longitudinal axis of the tube of the medical endoscopic device, so that the protruding elements fan out in order to contact the wall of the lumen of the body channel, to provide its support and to expand the lumen of the body channel, into which A medical endoscopic device has been introduced. The housing according to claim 1, wherein: the protruding elements are integrally formed with the outer surface of the elongated tubular element, the protruding elements being attached at their base to circumferentially arranged crossbars that are below the level of the outer surface of the cover, to form a hinge； or protruding elements are attached to or cast on the outer surface of the elongated tubular element, the bases of the protruding elements being pivotally attached toКожух для тубуса медицинского эндоскопического устройства, содержащий удлиненный трубчатый элемент и выполненный с возможностью надевания поверх тубуса медицинского эндоскопического устройства, при этом кожух идет вдоль по меньшей мере части длины дистального конца тубуса, при этом трубчатый элемент содержит внутреннюю поверхность, по меньшей мере часть которой захватывает тубус и удерживает кожух на месте, и внешнюю поверхность, которая содер
