Trocar Sleeve Assembly with Nested Sealing Chamber
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Solution Overview
Problem
In laparoscopic surgery, the use of multiple trocar assemblies in a single site can lead to a crowded surgical space, interfering with surgical techniques and increasing patient trauma, as they are inserted closely through a single incision, which complicates instrument manipulation and visualization.
Innovation Solution
The trocar assembly design includes a sleeve assembly with a cannula and obturator system that features a gripping portion with a specific axial length to width ratio, a deformable channel seal, and an insufflation port mechanism, allowing for efficient insertion and minimization of space while maintaining ease of handling, and includes various configurations for alignment and sealing to reduce interference between multiple trocars.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If multiple trocar assemblies are inserted through a single incision to minimize patient trauma, then patient trauma is reduced, but the surgical space becomes crowded and interferes with surgical techniques
Solution Approach 1:
The trocar assembly allows nesting of multiple instruments within a single sleeve structure. The obturator can be removed to allow passage of scoping devices and other instruments through the same trocar sleeve, effectively nesting multiple functional elements within one physical structure to reduce the number of separate incisions needed.
Solution Approach 2:
The trocar assembly is designed with specific dimensional ratios (axial length to maximum width between 2.5:1 and 3.5:1) to optimize the spatial arrangement of multiple trocars in the surgical field. This dimensional optimization allows multiple trocars to be positioned in close proximity while maintaining adequate working space for surgical instruments.
2Adaptability or versatility
If multiple trocar assemblies are used to insert multiple instruments, then instrument access is improved, but the crowded surgical space interferes with practitioner techniques
Solution Approach 1:
The trocar assembly is designed as a multi-functional device that can accommodate various surgical instruments. The sleeve structure with its specific dimensional ratios can receive different types of instruments including scoping devices, graspers, and cutting tools, allowing a single trocar placement to serve multiple surgical functions.
Solution Approach 2:
The trocar assembly utilizes specific parameter ranges (axial length to maximum width ratio between 2.5:1 and 3.5:1) to optimize the balance between instrument access and surgical maneuverability. This parameter optimization ensures that multiple instruments can access the surgical site through the trocar while maintaining sufficient working space for practitioner techniques.
3Ease of operation
If the gripping portion is made larger for easier handling, then ease of handling is improved, but the space requirements increase and cause more interference
Solution Approach 1:
The gripping portion of the trocar assembly is designed with optimized dimensional parameters, specifically maintaining an axial length to maximum width ratio between 2.5:1 and 3.5:1. This parameter optimization provides sufficient grip surface area for easy handling while minimizing the overall volume to reduce interference in the crowded surgical space.
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 design enhances surgical efficiency by minimizing space requirements, reducing trauma, and facilitating precise instrument placement and visualization, even with multiple trocars in close proximity, while allowing for easy handling and alignment to prevent interference.
Implementation Method 1
the channel seal includes a deformable body having a plurality of slits extending axially therethrough to define a plurality of segments
Implementation Method 2
the push tab is biased outward through the opening and out of engagement with the duckbill portion
Data Source
AI summary
A trocar sleeve assembly including a cannula connected to a housing assembly to define a working channel, wherein the housing assembly includes a housing that defines an opening in fluid communication with the working channel, a sleeve slidably received over the housing to define an annular region between the sleeve and the housing, a first sealing member forming a first seal between the sleeve and the housing, and a second sealing member forming a second seal between the sleeve and the housing, the second sealing member being axially spaced from the first sealing member to define a chamber in the annular region, and an insufflation port in fluid communication with the chamber, wherein the sleeve is slidable relative to the housing between a first position, wherein the chamber is in fluid communication with the opening, and a second position, wherein the chamber is fluidly decoupled from the opening.