Various embodiments include an endoscopic device. A sheath may enclose the device and may thereby guard against environmental contamination. The sheath may include one or more channels for transmission of instruments and/or solution to and from the body. The sheath may be disposable. A stopper unit may reduce fluid leakage from inside a body cavity during a procedure. The stopper unit may include a serrated outer contour to assist in catching at a body orifice. The stopper unit may have a perforable inner barrier designed to reseal about a probing portion inserted through the stopper unit.
