A device for introducing sterile instruments into an operation chamber or an instrument chamber comprises an introduction frame, a first roller and a second roller rotatable around their respective longitudinal axis and attached to the introduction frame such that the longitudinal axis of the first roller and the longitudinal axis of the second roller are parallel and the first roller and the second roller are movable along an axis extending perpendicular to their respective longitudinal axis. A distance between the first roller and the second roller is defined by a position of a movement of the first and second roller along the axis extending perpendicular to their longitudinal axes. The first and second rollers are biased to contact each other and may be moved along the axis to increase the distance to allow insertion of an instrument through a gap provided by the distance.