Rotatable Tissue-Removing Catheter for Angular Positioning
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Solution Overview
Problem
Current tissue-removing catheters face challenges in achieving precise angular positioning within body lumens, which can lead to inefficient tissue removal and potential complications during procedures like atherectomy.
Innovation Solution
A tissue-removing catheter with a rotatable tissue-removing element and an angular-positioning mechanism that allows for adjustment of the element's position relative to the catheter body, enabling precise angular positioning within the body lumen through a motor-driven system and sensor feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a tissue-removing catheter uses a fixed tissue-removing element position, then the device structure is simple, but the angular positioning precision within the body lumen is insufficient
Solution Approach 1:
The catheter employs a rotatable first longitudinal body portion that can rotate relative to the second longitudinal body portion, transforming the fixed position system into a dynamic adjustable system. This allows the tissue-removing element to achieve different angular positions within the body lumen, improving angular positioning precision while maintaining reasonable structural complexity through controlled rotational movement.
Solution Approach 2:
The invention introduces angular positioning as an additional degree of freedom by allowing rotation of the first longitudinal body portion around the longitudinal axis. This adds a rotational dimension to the otherwise linear catheter structure, enabling precise angular control of the tissue-removing element without fundamentally complicating the basic catheter architecture.
2Productivity
If the tissue-removing element is fixed relative to the catheter body, then the device is easier to manufacture, but the tissue removal effectiveness is reduced
Solution Approach 1:
The rotatable first longitudinal body portion provides dynamic adjustability for optimizing tissue removal effectiveness. The ability to rotate and position the tissue-removing element at different angles allows clinicians to adapt to various anatomical configurations and plaque locations, improving productivity. The manufacturing complexity increase is moderate, involving primarily rotational joints and positioning mechanisms.
Solution Approach 2:
The invention enables change in the angular parameter of the tissue-removing element relative to the catheter body. By allowing the first longitudinal body portion to rotate, the system can adjust the angular position parameter to optimize tissue removal effectiveness for different procedural requirements, while the underlying catheter structure remains relatively simple to manufacture.
3Reliability
If the catheter lacks an angular-positioning mechanism, then the device complexity is low, but the risk of procedural complications increases
Solution Approach 1:
The rotatable first longitudinal body portion with angular positioning capability enhances procedural safety by allowing precise control over the tissue-removing element's orientation. This dynamic positioning reduces the risk of unintended tissue damage and improves procedural reliability, while the mechanical rotation mechanism maintains reasonable device complexity without requiring overly complex control systems.
Data Source
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AI summary
A tissue -removing catheter for removing tissue from a body lumen includes a tissue-removing element. The tissue -removing element may be coupled to a first longitudinal body portion of the catheter body. The first longitudinal body portion may be rotatable along its length and relative to a second longitudinal body portion to adjust the angular position of the first longitudinal body portion relative to the second longitudinal body portion. An angular-positioning mechanism may be operatively connected to the tissue -removing element for rotating the tissue -removing element relative to the second longitudinal body portion about a rotational axis to adjust an angular tissue-removing position of the tissue -removing element, relative to the longitudinal axis of the body lumen, from a first angular tissue -removing position to a second angular tissue -removing position offset from the first angular tissue -removing position.