Reusable Cannula With Ribbed Shaft And Internal Valve
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Solution Overview
Problem
Conventional cannula systems are primarily designed for single-use and lack satisfactory solutions for reusable or reposable systems that can be effectively sterilized for multiple surgical procedures, posing a need for improved designs that allow for repeated use while maintaining sterility and stability during surgical procedures.
Innovation Solution
A cannula system comprising biocompatible materials, an internal valve system for insufflation, and a ribbed external surface to secure the cannula in place, allowing for multiple sterilizations and reducing movement during use, featuring a combination of thermoplastic and rubber components for durability and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional cannula systems are designed for single-use, then sterility is maintained, but cost increases and waste is generated
Solution Approach 1:
The cannula system is divided into separable components including a cannula body, valve assembly, and sealing elements that can be independently sterilized and reassembled, enabling reusable design while maintaining sterility through modular construction
Solution Approach 2:
The material selection and structural design allow the cannula to withstand repeated sterilization cycles (changing the parameter of durability) while maintaining functional integrity, transforming the cannula from single-use to multi-use capability
2Loss of substance
If conventional cannula systems are designed for reusability, then cost decreases and waste is reduced, but maintaining sterility and functional integrity becomes difficult
Solution Approach 1:
The cannula system incorporates pre-designed sterilization features and robust material selection that enable effective sterilization before each reuse, ensuring sterility is maintained through planned preparatory actions
Solution Approach 2:
The cannula utilizes composite material construction combining biocompatible polymers and sterilization-resistant components that can endure repeated sterilization processes while maintaining structural integrity and sterility
3Ease of operation
If the cannula shaft is smooth, then insertion is easier, but the cannula moves or shifts during surgical procedures
Solution Approach 1:
The cannula shaft incorporates localized rib members at specific positions along its length, providing enhanced tissue engagement and stability only where needed, while maintaining a smooth surface elsewhere for easy insertion
Solution Approach 2:
The rib members feature curved or rounded surfaces that engage tissue more effectively, providing mechanical interlocking that prevents cannula migration while allowing smooth passage through tissue during insertion
4Device complexity
If the cannula is designed without an internal valve system, then the structure is simpler, but insufflation of the body cavity cannot be maintained
Solution Approach 1:
The valve assembly is nested within the cannula body, with the valve mechanism contained inside the cannula shaft, creating a compact integrated design that maintains insufflation without significantly increasing external complexity
Solution Approach 2:
The internal valve system automatically maintains insufflation pressure without external intervention, with the valve mechanism self-regulating gas flow to preserve body cavity insufflation during surgical procedures
Data Source
AI summary
A cannula system is described. The cannula system may be formed of biocompatible materials that are suitable to be sterilized. Accordingly, the cannula system may be reusable for a relatively large number of surgical procedures assuming conventional sterilization techniques are employed after each surgical procedure. Additionally, the cannula system may be provided with an internal valve system disposed in a port portion thereof wherein the valve system may be operable to receive the trocar there through, as well as maintaining insufflation of the body cavity. Furthermore, the cannula system may be provided with a plurality of rib members formed on an external surface of the cannula shaft, wherein the rib members may engage the tissues adjacent the incision, thus maintaining the position of the cannula shaft and reducing and/or lessening relative movement of the cannula shaft.