подвод инструмента с отклонением почти до 90 градусов (до вертикали)
https://abdominalkey.com/endoscopes-guidewires-and-accessori...
Duodenoscopes are side-viewing video endoscopes that are equipped with an elevator and are used routinely for diagnostic and therapeutic ERCP procedures. The elevator facilitates cannulation of the papilla and placement of some accessories
Initial experience with a prototype oblique-viewing endoscope (Pentax Medical, Montvale, N.J.) (viewing angle of 45 degrees

https://patents.google.com/patent/US10905434B2/en
The flexible member may be formed, for example, as a coil of wire through which the control member 128 extends. As would be understood by those of skill in the art, the coil of wire preferably has sufficient flexibility to be passed through even tortuous paths of the living body and, in this embodiment, is sized and shaped to permit it to be passed through a working channel of a flexible endoscope or other insertion device.