Basket and Everting Balloon for Kidney Stone Removal
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for kidney stone removal, such as ESWL, URS, and PCNL, are invasive, require expensive equipment and skilled professionals, and often come with side effects, making them less than ideal for small stones or less invasive options.
Innovation Solution
A system comprising an inner and outer shaft with a stone retention member and a wall protection member, where the handle includes an eversion mechanism to form a pocket for capturing and removing kidney stones, potentially adapted for use in other body lumens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ESWL, URS, or PCNL methods are used for kidney stone removal, then stone removal effectiveness is improved, but invasiveness and complexity of the procedure increases
Solution Approach 1:
The device employs a nested structure where the basket is positioned within the balloon, and both are contained within the delivery catheter system. This nesting allows the complex functional components to be delivered through a minimally invasive percutaneous approach while maintaining their full functionality for effective stone removal
Solution Approach 2:
The device is divided into distinct functional segments: the basket for stone capture, the balloon for wall protection and dilation, and the delivery catheter system. This segmentation allows each component to be optimized for its specific function while being delivered as an integrated minimally invasive system
2Reliability
If ESWL, URS, or PCNL methods are used for kidney stone removal, then stone removal effectiveness is improved, but equipment cost and professional skill requirements increase
Solution Approach 1:
The device is designed to be self-contained with all necessary functional elements (basket, balloon, delivery system) integrated into a single percutaneous access system, eliminating the need for expensive specialized equipment like ESWL machines or complex ureteroscopy systems
Solution Approach 2:
The combined balloon-basket device serves multiple functions: stone capture, ureteral wall protection, and potential dilation, all through a single percutaneous access point. This multi-functionality reduces the need for multiple specialized devices and procedures
3Productivity
If traditional stone removal methods are used, then stone removal is achieved, but trauma to the ureteral wall increases
Solution Approach 1:
The balloon is positioned between the basket and the ureteral wall before stone removal occurs, providing pre-cushioning protection. The balloon can be inflated to create a protective barrier that prevents direct contact between the stone/basket and the delicate ureteral tissue
Solution Approach 2:
The balloon acts as an intermediary element between the stone removal mechanism (basket) and the ureteral wall, mediating the interaction to prevent harmful direct contact while still allowing effective stone capture and removal
Data Source
AI summary
Disclosed systems, methods, and devices may include a system for removing a kidney stone from a ureter. The system may have an inner shaft extending coaxially within an outer shaft, a stone retention member shaft having a stone retention member and extending coaxially within the inner shaft, a wall protection member coupled to the outer shaft and the inner shaft, and a handle coupled with proximal ends of the outer shaft, the inner shaft, and the stone retention member shaft. The handle may include an eversion mechanism coupled to the inner shaft and configured to actuate the inner shaft, thereby everting the wall protection member to form a pocket adapted to receive a kidney stone. The system may also include a retention member mechanism coupled to the stone retention member shaft and configured to actuate the stone retention member shaft.