Endoscope sheath, endoscope arrangement, and method for providing an endoscope arrangement

An endoscope arrangement comprising:

• an endoscope sheath including an elongate flexible hose, which encloses a main lumen, for receiving at least one portion of a shank of a flexible endoscope, and at least one working channel, for receiving at least one portion of a flexible endoscopic working instrument,
• a flexible endoscope dimensioned for insertion into the main lumen of the endoscope sheath, and
• a flexible endoscopic working instrument dimensioned for insertion into the working channel of the endoscope sheath.

A method for providing an endoscope arrangement, wherein a flexible endoscope, a flexible endoscopic working instrument and an endoscope sheath are provided, wherein the endoscope sheath comprises an elongate flexible hose which encloses a main lumen, for receiving at least one portion of a shank of the flexible endoscope, and at least one working channel, extending parallel to the main lumen and receiving at least one portion of the flexible endoscopic working instrument, and wherein the endoscope sheath has a transparent distal end portion, wherein furthermore at least one portion of the shank of the flexible endoscope is inserted into the main lumen such that a viewing lens of the endoscope is arranged in a distal end area of the endoscope sheath, the distal end area of the endoscope sheath is rotated relative to a proximal end area about a central longitudinal axis of the main lumen, such that the working channel extends helically around the central longitudinal axis of the main lumen, the endoscope sheath is fixed in rotation relative to the endoscope in a proximal and a distal end area, and wherein at least one portion of the flexible endoscopic working instrument is inserted into the working channel.

An endoscope sheath, comprising an elongate flexible hose, which encloses a main lumen, for receiving at least one portion of a shank of a flexible endoscope, and at least one working channel, for receiving at least one portion of a flexible endoscopic working instrument, characterized in that the working channel is guided in the form of a helical line around the main lumen and, in the distal end portion, extends approximately parallel to a central longitudinal axis of the main lumen.

An endoscope sheath, comprising an elongate flexible hose, which encloses a main lumen, for receiving at least one portion of a shank of a flexible endoscope, and at least one working channel, for receiving at least one portion of a flexible endoscopic working instrument, characterized in that a cross-sectional contour of the hose has a continuous convex curvature or is rectilinear in parts and has a convex curvature in the other parts.