Multi-Organ Preoperative Locator With Blunt Needle and Tissue Anchoring
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Solution Overview
Problem
Current medical devices for preoperative localization of small lesions in various organs, such as pulmonary nodules, liver nodules, and gastrointestinal lesions, face limitations in applicability, safety, and precision, with existing micro-spring rings being unsuitable for non-vascular applications and percutaneous puncture needles risking vascular injury.
Innovation Solution
A multifunctional preoperative precise locator comprising a guiding system with a guide needle, calibration lines, and positioning systems using micro-spring rings and push rods, designed for multiple organs, ensuring safety and precision by adapting to different tissues and minimizing vascular injury.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional tower-shaped micro spring rings are used for preoperative localization, then they are suitable for identifying lung tissue and have good tissue compatibility, but they are not suitable for fixing or identifying hepatic tissue or gastrointestinal wall and have limited indications to vascular embolization only
Solution Approach 1:
The patent modifies the micro spring ring structure to create a universal localization device that can be applied to multiple organs including lungs, liver, kidneys, and gastrointestinal tract. The modified structure with expanded distal end and hooks enables the device to function across different tissue types and anatomical locations, transforming it from a vascular-specific tool to a multi-organ localization system
Solution Approach 2:
The micro spring ring is designed with non-uniform structure where the distal end is expanded and equipped with hooks that can be embedded into tissue, while the proximal end remains open for delivery through the needle. This local differentiation in structure allows the device to provide secure anchoring in soft tissues while maintaining deliverability through narrow puncture paths
2Measurement precision
If percutaneous puncture needles with sharp needle tips are used for preoperative localization under image guidance, then they enable precise needle placement, but they cannot avoid vascular injury and the occurrence of complications
Solution Approach 1:
The patent inverts the traditional sharp-tip needle design by using a blunt needle tip for the guide needle. This inversion allows the needle to displace rather than penetrate vessels, reducing vascular injury while maintaining the ability to reach the target lesion under imaging guidance for accurate localization
3Measurement precision
If indocyanine green fluorescent agents are used for preoperative localization of lungs, liver, and gastrointestinal lesions, then they enable visualization of lesions, but they require special and expensive detection equipment
Solution Approach 1:
The patent replaces chemical/fluorescent localization methods with a mechanical localization system using modified micro spring rings. Instead of relying on fluorescent agents that require special imaging equipment, the device uses a purely mechanical structure with hooks and expanded distal end that can be directly visualized and secured during surgery, eliminating the need for expensive fluorescent detection equipment
Data Source
AI summary
The present invention provides a multifunctional preoperative precise locator suitable for multiple organs, comprising a guiding system and a positioning system. The guiding system includes a guiding needle, a guiding needle handle, scale lines, rubber limiters, sharp needle cores, and blunt needle cores. The present invention enhances the safety and ease of operation of preoperative localization of small nodules in various organs, broadens the range of guidance devices for preoperative localization: ultrasound, CT, PET/CT, and MRI can all be used, significantly improves the accuracy of localization, can precisely guide the surgical resection range, and maximizes the preservation of residual anatomical structures and functions of organs in patients.