Modular Laparoscopic Device Rod Actuation
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Solution Overview
Problem
Existing laparoscopic manipulators are prone to failure due to their delicate wire-based systems and are often single-use, leading to substantial waste as entire devices must be discarded if they cannot be sterilized.
Innovation Solution
A modular laparoscopic device design utilizing tensioned rods with non-diametrical hinges and separable parts, allowing for angular displacement and tool activation, reducing points of failure and enabling part replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If wire-based systems are used to provide maneuverability, then the device can change shape during operation, but the reliability decreases due to delicate wires and numerous moving parts
Solution Approach 1:
The patent replaces the traditional wire-based mechanical system with a rod-based system. The articulation mechanism uses rigid rods connected by hinges instead of flexible wires, eliminating the delicate components that prone to failure while maintaining the ability to change the manipulator's shape and position during surgery.
Solution Approach 2:
The manipulator is divided into modular segments (outer rod, actuation rod, attachment rod, articulated section) that can be independently replaced. This segmentation allows individual components to be swapped out for sterilization or replacement without discarding the entire device, improving reliability through component renewal.
2Object-affected harmful factors
If single-use devices are used to ensure sterility, then contamination risk is eliminated, but substantial waste is generated when devices cannot be adequately sterilized
Solution Approach 1:
The device is designed as a modular system where the outer rod, actuation rod, and attachment rod are separate, replaceable components. This allows selective replacement of only the portions that require sterilization or have become contaminated, rather than discarding the entire manipulator.
Solution Approach 2:
The patent enables recovery and reuse of device components through modular replacement. Parts that can be adequately sterilized are retained and reused, while only specific components are replaced, thereby reducing waste while maintaining sterility standards.
3Duration of action of stationary object
If modular parts are used to enable replacement, then device life is extended and waste is reduced, but the device complexity increases
Solution Approach 1:
The manipulator is divided into distinct modular components (outer rod, actuation rod, attachment rod, articulated section with hinges) that can be independently replaced. This segmentation extends device life by allowing selective replacement of worn or contaminated parts without redesigning the entire system.
Solution Approach 2:
The modular components are designed with standardized interfaces and connections that allow them to serve multiple functions and be interchangeable. The articulated section with non-diametrical hinges provides universal articulation capability across different tool configurations, reducing overall system complexity despite modularity.
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 modular design extends the device's effective life by reducing failure points and allowing for the replacement of worn or dirty parts, thereby reducing waste and improving reliability.
Implementation Method 1
an actuation rod disposed within the outer rod, having a proximal end connected to the actuating handle and a distal end connected to a tension element disposed within the articulated section of the outer rod, configured to cause an angular displacement of said articulated section when tension is applied
Implementation Method 2
an articulated section formed from a plurality of links joined with non-diametrical hinges configured to have a greater angular range in a first direction than in an opposite direction
Data Source
AI summary
A laparoscopic device that includes an outer rod having a end connected to a handle and an end having an articulated section formed from links joined with non-diametrical hinges; an actuation rod within the outer rod, having an end connected to the handle and an end connected to a tension element within the articulated section, configured to cause the articulated section to bend when tension is applied; and an attachment rod within the actuation rod having an end connected to the handle and an end having a flexible section connected to a tool. The handle includes an actuator configured to apply tension to the attachment rod such that the tool is activated; a rod actuator configured to apply tension to the actuation rod such that the articulated section of the outer rod bends; and a lockable rotator, configured to rotate the outer rod with respect to the handle.