Expandable Anti-Retropulsion Device for Surgical Lumen Occlusion
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Solution Overview
Problem
Current anti-retropulsion systems used in surgical procedures are not widely adopted due to issues such as damage during procedures, inability to be easily retracted, and the need for additional steps for removal, and lack of expandability to fill the entire cross-section of a body lumen.
Innovation Solution
An anti-retropulsion device with an expandable segment, distal and proximal collars, and an elongate tubular sleeve with apertures that can expand radially and circumferentially to fill the lumen, allowing for extension behind debris and easy retraction, compatible with lasers and ultrasonic devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the anti-retropulsion system is made expandable to fill the entire cross-section of a body lumen, then the effectiveness in preventing retropulsion is improved, but the device complexity increases
Solution Approach 1:
The expandable segment is divided into multiple expandable members (e.g., struts or ribs) that can be individually controlled to expand and contract. This segmentation allows the device to achieve full luminal occlusion while maintaining structural control and reducing complexity through modular design.
Solution Approach 2:
The device transitions from a compressed delivery state to an expanded functional state through the expansion mechanism. This dynamic transformation allows the device to fill the entire cross-section of the body lumen when needed while maintaining a compact profile during delivery, resolving the contradiction between effectiveness and complexity.
2Ease of operation
If the anti-retropulsion system is designed to be easily retracted and removed, then the ease of operation is improved, but the reliability may be compromised
Solution Approach 1:
The expandable members are designed to be dynamically controllable, allowing them to expand securely during the procedure to prevent retropulsion, and then contract for easy retraction and removal. This dynamic capability enables the device to provide reliable occlusion when deployed while maintaining ease of operation for deployment and removal.
Solution Approach 2:
The expansion and contraction mechanism may utilize non-mechanical or simplified actuation methods (such as shape memory alloys, electroactive polymers, or simple balloon expansion) to replace complex mechanical systems, thereby enabling easy retraction while maintaining procedural reliability.
3Reliability
If the anti-retropulsion system is made resistant to laser damage, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The device incorporates laser-resistant materials (such as specific polymers, ceramics, or coated metals) into its construction to withstand laser energy during lithotripsy procedures. These composite materials provide laser resistance while maintaining the structural integrity and functionality of the expandable device, resolving the contradiction between reliability and complexity.
4Reliability
If the anti-retropulsion system is designed to expand radially and circumferentially, then the effectiveness in filling the lumen is improved, but the device complexity increases
Solution Approach 1:
The expandable segment comprises multiple expandable members arranged radially and circumferentially that can be independently controlled. This segmentation enables the device to expand uniformly in all directions to fill the entire luminal cross-section while maintaining structural control through modular design, thereby achieving effective occlusion without excessive complexity.
Data Source
AI summary
An anti-retropulsion device comprising: an expandable segment; a distal collar positioned distally of the expandable segment; and a proximal collar positioned proximally of the expandable segment; wherein the expandable segment has a corresponding plurality of expandable members, and wherein each of the expandable members is configured to expand or contract radially and circumferentially in correspondence with a change in spacing between the distal collar and the proximal collar.