Offset Dual-Seal Surgical Device for Pneumoperitoneum Maintenance
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Solution Overview
Problem
Current surgical devices fail to effectively retract and seal wound openings during procedures like hand-assisted laparoscopic surgery, leading to leakage of insufflation gas and compromised pneumoperitoneum.
Innovation Solution
A dual-seal surgical device with offset accessways in each sealing member, biased by magnets or elastic bands, allowing for sealed access and retraction of a surgeon's arm, and featuring various configurations such as central openings, edge passageways, and overlapping sheets to maintain a gas-tight seal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a single sealing member with a central opening is used, then access is simplified, but gas leakage occurs at the wound opening
Solution Approach 1:
The sealing system is divided into multiple sealing members (first sealing member and second sealing member) with separate accessways. Each sealing member can be independently positioned and sealed, allowing one sealing member to maintain the gas seal at the wound opening while another provides access, thus resolving the contradiction between access ease and seal integrity
Solution Approach 2:
A retracting member is introduced as an intermediary component that physically separates the wound opening from the access pathway. The retracting member creates a lateral retraction of the wound opening, allowing the sealing members to maintain effective seals while enabling surgeon access through the offset accessways
2Ease of operation
If the wound opening is retracted laterally to improve access, then surgical access is enhanced, but sealing the retracted opening becomes more difficult
Solution Approach 1:
The sealing members are designed with flexible materials that can dynamically adapt to the retracted wound opening geometry. The sealing members can deform and conform to the laterally retracted opening shape, maintaining effective sealing despite the changed configuration, thus managing the complexity while enabling improved access
3Reliability
If multiple sealing members with offset accessways are used to prevent gas leakage, then seal reliability is improved, but device complexity increases
Solution Approach 1:
Multiple sealing members with offset accessways are combined into a single integrated surgical device assembly. The first sealing member, second sealing member, retracting member, and biasing elements are merged into one cohesive system that works together to provide both reliable sealing and surgeon access, managing the overall device complexity while maintaining seal integrity
4Reliability
If a closure member is added to occlude accessways when not in use, then gas seal reliability is improved, but ease of operation is reduced
Solution Approach 1:
The closure member is pre-positioned within the accessways and automatically occludes the pathways when not in use. When the surgeon needs access, the closure member is simply pulled or pushed to open the pathway. This preliminary positioning and automatic occlusion mechanism maintains seal reliability while requiring minimal additional操作步骤 for access
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device ensures sealed access and maintains pneumoperitoneum by preventing gas leakage, allowing for effective surgical procedures with both hands while maintaining a secure seal.
Implementation Method 1
the biasing means comprises a magnet coupled to each sealing member
Implementation Method 2
the resilient member comprises an elastic band
Data Source
AI summary
A seal comprises a first sealing member and a second sealing member. The sealing members each have an accessway to facilitate access from one side of the sealing member to the other side of the sealing member. The accessways are offset to facilitate sealed access of an object through the sealing members.