Endoscopic Stitching Device Sealing Pack Assembly
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Solution Overview
Problem
Existing endoscopic stitching devices face challenges in preventing fluid ingress into the distal end of the elongate shaft assembly during surgical procedures, which can compromise the effectiveness and sterility of the process.
Innovation Solution
A sealing pack assembly is integrated into the elongate shaft assembly, featuring a central lumen for the axial rod and lumens for needle receiving blades, with outer and inner lips that engage the shaft and rod to form a fluid-tight seal, utilizing compressible materials and a clevis configuration to enhance sealing efficacy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sealing pack is added to inhibit fluid passage, then fluid sealing capability is improved, but device complexity increases
Solution Approach 1:
The sealing pack is nested within the elongate shaft assembly, with the central lumen accommodating the axial rod and additional lumens accommodating needle receiving blades. This nested configuration allows the sealing pack to provide comprehensive fluid sealing for multiple internal components without requiring separate sealing devices for each, thereby improving fluid sealing capability while minimizing the increase in device complexity.
Solution Approach 2:
The sealing pack incorporates lips that form flexible sealing surfaces engaging with the axial rod and needle receiving blades. These flexible lip structures create effective fluid seals through contact deformation, providing reliable sealing capability while maintaining a relatively simple single-component structure rather than requiring multiple rigid sealing elements.
2Reliability
If multiple lumens and lips are added to the sealing pack, then sealing effectiveness is improved, but manufacturing complexity increases
Solution Approach 1:
The sealing pack integrates multiple sealing functions into a single component structure. The central lumen seals around the axial rod while additional lumens seal around needle receiving blades, and multiple lips provide sealing at different locations and orientations. This merging of multiple sealing functions into one component improves sealing effectiveness while avoiding the need to manufacture and assemble multiple separate sealing elements, thereby reducing overall manufacturing complexity.
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 sealing pack assembly effectively inhibits fluid passage into the shaft assembly, maintaining sterility and facilitating smooth operation of the stitching device by creating multiple layers of seals, ensuring reliable performance during endoscopic procedures.
Implementation Method 1
The sealing pack is formed of a compressible material and includes a plurality of outer lips extending outwardly from the body portion and a plurality of inner lips extending inwardly from the central lumen. Each outer lip of the plurality of outer lips is configured to engage the elongate shaft assembly in a sealing relation. Each inner lip of the plurality of inner lips is configured to engage the axial rod in a sealing relation.
Data Source
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AI summary
An endoscopic stitching device includes an elongate shaft assembly, a tool assembly coupled with the elongate shaft assembly, and a sealing pack disposed in the elongate shaft assembly. The sealing pack defines a central lumen configured to receive an axial rod therethrough, and first and second lumens dimensioned to receive respective first and second needle receiving blades therethrough. The sealing pack includes a body portion, a plurality of outer lips extending outwardly from the body portion, and a plurality of inner lips extending inwardly from the central lumen. Each outer lip of the plurality of outer lips is configured to engage the elongate shaft assembly in a sealing relation. Each inner lip of the plurality of inner lips is configured to engage the axial rod in a sealing relation.