Abstract: An endoscope including: a handle; and an insertion cord; the handle including: a working channel access port providing access to a working channel extending from the handle to a distal tip unit of the insertion cord; and a biopsy valve attached or attachable to the working channel access port; the biopsy valve including: a valve body attached or attachable to the working channel access port; and a valve lid configured to be detachably attached to the valve body; wherein the valve lid includes a slit which is formed or configured so as to close and seal the working channel access port and which provides a passageway for insertion of the tool or instrument; and wherein the slit includes at least one slit end arranged in a weakened portion determining a defined crack-growth direction starting from the at least one slit end.

Abstract: An endoscope including a handle and an insertion cord. The handle includes a Y-connector having: a first branch/socket having a first opening from which a first channel extends; a second branch/socket having a second opening from which a second channel extends; and a third branch/socket having a third opening, wherein the first channel and the second channel join each other in a third joined channel and the third joined channel extends inside the third branch or socket towards the third opening. The first channel and the third joined channel form together an instrument insertion channel of the Y-connector. The first channel is a curved channel having a curvature at least in sections inside the first branch or socket and/or the third joined channel is a curved channel having a curvature at least in sections inside the third branch or socket.