Surgical system and expansion device

Inventors

Wakasone, Jun • Kobayashi, Hiroyoshi • Murata, Takeshi • Takemoto, Shotaro

Assignees

Olympus Corp

Abstract

A surgical system includes: an overtube including a channel into which an endoscope is inserted; and an expansion device configured to ensure a surgical space by expanding an interior of a body at a distal side relative to a tip of the overtube. The expansion device includes a sheath and a wire configured to be protrudable from the sheath. The wire is configured to be switchable between a first configuration in which the wire protrudes from the sheath and a second configuration in which the wire protrudes from the sheath in a state where the wire is tilted, around a longitudinal axis, at an angle different from the first configuration.

Core Innovation

A surgical system is described for securing a surgical space in a lumen using an overtube that carries one or more expansion devices and an endoscope. Each expansion device is configured so that a wire is provided at a distal side, and the wire is caused to protrude radially outward from the expansion device to expand the surgical space.

The securing includes rotating the expansion device or expansion devices around a longitudinal axis of the respective first channels to change a protruding angle of the wire and increase a visual field of an affected site in the lumen. In an embodiment with two expansion devices, the two expansion devices are rotated independently of each other to change each wire protruding angle.

Mechanical limiter structures are described for controlling wire protruding and for preventing damage when the wire remains protruded. These include a rotation stopper that limits wire rotation and an overtube lever-based retraction prevention stopper that prevents retraction damage when a protruding wire state is present.

Claims Coverage

The partial content includes two independent method claims, both centered on causing radially outward wire protrusion from expansion devices and rotating the expansion device or devices to change a wire protruding angle to increase a visual field of an affected site. Across the claim families, the inventive features are reinforced by mechanical constraints and by endoscope-based checking and adjustment for two expansion devices.

Overall, the claims cover securing a surgical space in a lumen by deploying wire-protruding expansion devices through an overtube, where visual field improvement is achieved by rotating the expansion device or devices to change a wire protruding angle; for two devices, the rotation is independent to adjust each protruding angle.

Stated Advantages

Documented Applications