Deformable Sleeve Suction Cannula for Debris Filtration
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Solution Overview
Problem
Existing surgical devices face challenges in effectively managing debris within body cavities during minimally invasive procedures, leading to cannula clogging, extended intervention times, and increased risks due to the need for frequent unclogging and instrument exchange.
Innovation Solution
A surgical device featuring a deformable sleeve made of a mesh of stainless steel wires with a cross-section of 150-300 micrometers, allowing for deployment by translation and rotation to filter debris and maintain suction functionality, with a handle controlling the sleeve's position for selective filtration and fluid passage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a standard cannula is used for suction, then fluid removal is effective, but the cannula clogs frequently with solid debris requiring instrument exchange
Solution Approach 1:
The device employs a deformable sleeve that can dynamically change its state between collapsed and expanded configurations. In the collapsed state, the sleeve allows free passage of fluids and debris. When expanded, it creates a filtering action that prevents solid debris from entering the cannula while maintaining suction capability, thus resolving the contradiction between suction efficiency and clogging resistance
Solution Approach 2:
The invention changes the physical parameter of the sleeve's cross-sectional area through deformation. By transitioning from a collapsed narrow profile to an expanded wider profile, the sleeve modifies the flow characteristics and filtering properties, enabling it to prevent clogging while maintaining effective suction of fluids
2Reliability
If instruments are exchanged frequently to clear debris, then clogging is prevented, but intervention time increases
Solution Approach 1:
The deformable sleeve is pre-configured with the capability to prevent debris entry before clogging occurs. By maintaining a cleared state through the filtering action of the expanded sleeve, the need for time-consuming instrument exchanges is eliminated, thus reducing procedure duration while maintaining reliability
Solution Approach 2:
The device enables continuous suction operation without interruption for instrument exchange. The deformable sleeve maintains its filtering function throughout the procedure, allowing the suction to continue uninterrupted, thereby eliminating time loss and maintaining continuous productive action
3Strength
If a rigid structure is used for debris management, then structural integrity is maintained, but tissue damage risk increases
Solution Approach 1:
The invention uses a flexible deformable sleeve instead of a rigid structure. This flexible component can conform to tissue surfaces and deform around anatomical structures, maintaining structural integrity for debris management while minimizing tissue trauma through its compliant nature
Solution Approach 2:
The dynamic deformability of the sleeve allows it to adapt its rigidity based on operational needs. When expanded, it provides sufficient structure for filtering; when collapsed or moving through narrow passages, it becomes flexible enough to avoid tissue damage, thus resolving the contradiction between structural integrity and tissue safety
Data Source
AI summary
The disclosure relates to a surgical device comprising a rod having a deformable sleeve at its distal end surrounding the rod, the control element being longitudinally movable for moving the proximal end of the sleeve between a rest position, in which the deformable sleeve has a tubular shape, and an active position, in which the sleeve is deformed by bringing together its distal and proximal ends. The rod is made up of an internal hollow tubular element surrounded by a sheath that can move in translation and rotation relative to the internal hollow tubular element. The distal end of the sleeve is fixed onto a peripheral strip of the internal hollow tubular element and the proximal end of the sleeve is fixed onto a peripheral strip of the sheath.