Rotatable Wire Expansion for Adjustable Endoscopic Surgical Space
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Solution Overview
Problem
Existing surgical systems face challenges in creating an optimal visual and surgical field by effectively expanding tissue around an endoscope and surgical tool, particularly when dealing with varying tissue sizes and shapes.
Innovation Solution
A surgical system comprising an overtube with an endoscope and an expansion device featuring a sheath and a wire that can protrude and tilt at different angles, allowing for adjustable expansion and rotation to accommodate varying tissue sizes and shapes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed retractor is used to spread tissue, then a surgical field is ensured, but the surgical space cannot be adjusted to varying sizes of affected sites
Solution Approach 1:
The wire is made rotatable around the longitudinal axis of the sheath, allowing the protrusion direction to be dynamically adjusted. This enables the surgical space to be adapted to varying sizes and shapes of affected sites while maintaining a relatively simple device structure consisting of a sheath and a wire.
2Ease of operation
If the wire protrudes in a fixed direction, then the device structure is simple, but the visual and surgical field cannot be optimized for different observation directions
Solution Approach 1:
The wire is configured to be rotatable around the longitudinal axis of the sheath, allowing the operator to easily adjust the protrusion direction to optimize the visual and surgical field. This dynamic positioning capability is achieved through a simple rotational mechanism without complex control systems.
Data Source
AI summary
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.