Distal Release Retrieval Assembly for Minimally Invasive Stone Extraction
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Solution Overview
Problem
Current medical devices often require multiple instruments for extracting stone fragments from the body, leading to increased trauma and complications, especially when fragments migrate further into the body during lithotripsy procedures, necessitating a single instrument capable of entrapment and removal of tissue or foreign matter efficiently.
Innovation Solution
A medical device comprising an external elongate member with a lumen and an internal elongate member, featuring a retrieval assembly with a selectively open or closed distal end, allowing for entrapment and release of objects within the body lumen, facilitated by a flexible member and actuator for controlled deployment and extraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple instruments are used for extracting stone fragments, then extraction capability is improved, but patient trauma and procedural complexity increase
Solution Approach 1:
The patent combines multiple extraction mechanisms (basket, net, claw, or scoop configurations) into a single retrieval assembly that can be deployed through one instrument. This merging of functions allows the device to handle various stone fragment sizes and migration scenarios while reducing procedural complexity and patient trauma associated with multiple successive instrumentations.
Solution Approach 2:
The retrieval assembly is designed with universal applicability to handle different extraction scenarios including migrated fragments, varying stone sizes, and different anatomical locations. The selectable configurations (basket, net, claw, scoop) provide multi-functional capability within a single device, eliminating the need for multiple specialized instruments.
2Reliability
If multiple successive instrumentations are performed, then extraction completeness is improved, but tissue trauma increases
Solution Approach 1:
By combining multiple extraction mechanisms into a single retrieval assembly, the patent enables complete extraction of stone fragments in one procedure rather than requiring multiple successive instrumentations. This reduces cumulative tissue trauma while maintaining extraction completeness through the versatile configurations available within the single device.
3Object-affected harmful factors
If a single instrument is used for extraction, then patient trauma is reduced, but extraction versatility may be limited
Solution Approach 1:
The retrieval assembly is segmented into multiple selectable configurations (basket, net, claw, or scoop) that can be deployed from a single instrument. This segmentation allows each configuration to be optimized for specific extraction scenarios while maintaining the benefit of single-instrument delivery, thus preserving extraction versatility without increasing patient trauma.
Solution Approach 2:
The retrieval assembly incorporates dynamic, selectable configurations that can be deployed based on the specific extraction needs encountered during the procedure. This dynamic adaptability allows a single instrument to provide versatile extraction capabilities for different stone fragment sizes, shapes, and migration patterns.
Data Source
AI summary
A device and related method of use is provided for the capture and removal of various unwanted objects present within the body's anatomical lumens. In an embodiment of the present disclosure, the device includes an external elongate member; an internal elongate member disposed within the external elongate member; and a retrieval assembly connected to the internal elongate member and retractable within and extendable from a lumen of the external elongate member. The retrieval assembly includes an end configured to be selectively open or substantially closed.