Method for selective endoscopic cannulation of ductal structures

Details Method for selective endoscopic cannulation of ductal structures Method for selective endoscopic cannulation of ductal structures

1992-05-11

1995-01-24

Rosenbaum, C. Fred

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604 95, A61M 3100

Patent

active

053838491

ABSTRACT:
A method and device for selective endoscopic cannulation is disclosed. The cannulator includes an elongated intermediate portion which is normally straight and flexible and a distal tip portion which flexibly deviates in a specific direction away therefrom. The cannulator also includes a referential coupling, maintained in fixed relation within the cannulator, which allows bending of the cannulator along a portion of the length of the cannulator in a first plane which is transverse to the longitudinal axis of the referential coupling while resisting bending in other transverse planes relative thereto. The cannulator is advanceable through the operating channel of an endoscope and through the entrance into the ductal system, where it can be positioned with the referential coupling located at the entrance to the ductal system. When so located, the referential coupling maintains a predictable orientation between the cannulator and the ductal entrance in dependence upon the position of the operating end of the endoscope relative to the ductal entrance. By manipulating the endoscope and cannulator relative the ductal entrance, with the referential coupling maintaining the predicted relative orientation between the cannulator and the entrance in response to these manipulations, the tip of the cannulator can thus be predictably maneuvered within the ductal system to thereby locate and cannulate the desired ductal structure therein.

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patent: 5109830 (1992-05-01), Cho

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