Magnetic Catheter Drill Tip for Complex Vessel Tunneling
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Solution Overview
Problem
Conventional magnetic catheters struggle to effectively perform tunneling treatments, especially when navigating complex blood vessels due to insufficient force transmission to the catheter tip.
Innovation Solution
A magnetic catheter design featuring a drill tip at its front end, driven by an external magnetic field, with a guide rod and multiple magnets arranged to enhance force transmission and rotation, allowing controlled collision with lesions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a conventional magnetic catheter is used for tunneling treatment, then the catheter can be remotely controlled, but the force cannot reach the end of the catheter when the lesion is located in a portion after passing through a complex blood vessel
Solution Approach 1:
The catheter is divided into multiple segments including a proximal shaft, a distal shaft, and an intermediate section with a drill tip. The guide rod is segmented with multiple magnets positioned at different locations. This segmentation allows force to be applied and transmitted through specific segments to reach the distal end effectively, solving the problem of force attenuation in long catheters.
Solution Approach 2:
A guide rod with magnets is introduced as an intermediary mechanism between the external magnetic field and the catheter body. The magnets on the guide rod interact with the external magnetic field to generate forces that are transmitted to the drill tip and catheter, enabling effective force transmission over long distances through complex blood vessels.
2Length of moving object
If the catheter is made longer to reach distant lesions, then the treatment coverage is improved, but the force transmission becomes insufficient
Solution Approach 1:
The catheter is divided into multiple segments including a proximal shaft, a distal shaft, and an intermediate section with a drill tip. The guide rod is segmented with multiple magnets positioned at different locations. This segmentation allows force to be applied and transmitted through specific segments to reach the distal end effectively, solving the problem of force attenuation in long catheters.
Solution Approach 2:
The magnetic properties are changed by incorporating multiple magnets with different polarities along the guide rod. This creates varying magnetic force distributions that can effectively transmit force through the extended catheter length, maintaining sufficient force transmission capability despite the increased catheter length.
3Reliability
If a drill tip is added to enable collision mechanism, then the tunneling treatment effect is improved, but the device complexity increases
Solution Approach 1:
The drill tip is merged with the catheter body in the intermediate section, and the guide rod with magnets is integrated into the catheter structure. This combining of functions (drilling, guiding, and magnetic actuation) into a single integrated device achieves effective tunneling treatment while managing device complexity through functional integration.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design enables effective lesion removal and tunneling through complex blood vessels by rotating and moving the drill tip under external magnetic control, enhancing treatment efficacy.
Implementation Method 1
a drive magnet coupled to the body along an outer peripheral surface of the body... the drill tip provided at the front end of the magnetic catheter may rotate and move in forward and rearward directions under the control of an external magnetic field
Implementation Method 2
a fixed magnet located in the inner space, fixedly coupled to the opposite end of the guide rod... arranged such that a polarity of the fixed magnet, which is different from a polarity of the coupling magnet, faces the polarity of the coupling magnet
Data Source
Figure 1~2
Figure 3(A)~3(B)
Figure 4~5
AI summary
A magnetic catheter is disclosed. The magnetic catheter comprises: a first fixed magnet which is coupled to the front end of a catheter tube; a guide rod of which one end is coupled to the front end of the catheter tube, and the other end protrudes to the front of the catheter tube by a predetermined length; a body which is provided with a drill tip on the front end thereof, and has formed therein an inner space in which the other end of the guide rod is positioned; and a first drive magnet which is coupled to the body along the outer peripheral surface of the body.