Direct-Driven Needle Suturing Device for Puncture Wound Closure
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Solution Overview
Problem
Conventional wound closure devices for puncture wounds, particularly those used in surgical procedures, are often cumbersome due to complex mechanisms for deploying and retracting suturing needles, making the extension and retraction process difficult.
Innovation Solution
A suturing device with a housing, a rod, and a ferrule assembly that includes a needle configured for translation through a guide lumen, allowing for a male-female friction fit engagement with a ferrule to securely hold a suture, facilitating easy insertion and removal of the ferrule through tissue, and adjustable rod length for varying tissue thicknesses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional mechanisms are used for deploying and retracting needles, then needle deployment function is achieved, but device complexity increases and ease of operation deteriorates
Solution Approach 1:
The needle is extracted as a separate, disposable component that can be easily attached to and removed from the device body. The needle carrier allows the needle to be independently handled and replaced without affecting the main device structure, simplifying the deployment process while maintaining functionality.
Solution Approach 2:
The device is segmented into distinct functional modules: a reusable device body housing, a needle carrier mechanism, and a disposable needle with suture. This segmentation allows each component to be optimized independently and simplifies the overall operation by allowing the needle to be deployed as a separate unit.
2Ease of operation
If complex mechanisms are used for needle retraction, then needle control is achieved, but ease of operation deteriorates
Solution Approach 1:
The needle is completely extracted from the device after use by simply detaching it from the needle carrier. This eliminates the need for complex retraction mechanisms, as the needle is designed to be easily removed and replaced rather than retracted and reused.
Solution Approach 2:
The needle is designed as a disposable component that is replaced rather than retracted or reused. This approach simplifies the device structure by eliminating complex retraction mechanisms while ensuring sterile, single-use needles for each procedure.
3Adaptability or versatility
If fixed rod length is used, then device structure is simplified, but adaptability to varying tissue thicknesses deteriorates
Solution Approach 1:
The rod length is made dynamically adjustable rather than fixed. The rod can be extended or retracted to different lengths and locked in position, allowing the device to adapt to varying tissue thicknesses while maintaining a relatively simple structural design.
Solution Approach 2:
The adjustable rod mechanism provides multi-functionality, allowing the same device to be used for different tissue thicknesses and anatomical locations. This universal design increases adaptability without requiring multiple specialized devices.
Data Source
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AI summary
A suturing device includes a housing, a rod, a ferrule assembly, and a needle. The housing defines a guide lumen extending longitudinally therethrough. The rod is engaged with the housing and extends distally therefrom. The ferrule assembly is disposed at a distal end of the rod and is configured to releasably retain a ferrule therein. The ferrule is adapted to retain of a portion of a suture therein. The needle is configured for translation through the guide lumen defined within the housing. A distal end of the needle is configured to engage the ferrule within the ferrule assembly for removal of the ferrule from the ferrule assembly.