Tapered Guide Extension Catheter with Balloon for Vessel Safety
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Solution Overview
Problem
Conventional guide extension catheters often cause vessel injury and tear during delivery in heart arteries, and struggle with delivering large equipment due to their design, leading to difficulties in complex interventions.
Innovation Solution
A guide extension catheter with a tapered distal portion and a built-in balloon at its tip, featuring a sliding tab for controlling the balloon's movement, and dual lumens for 'Over-the-wire' and 'Rapid-exchange' capabilities, which minimizes vessel injury and allows for deeper and safer insertion without a sheath.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional catheter with a mid-section supple half-pipe is used, then the catheter can be delivered in heart arteries, but it causes vessel injury and tear
Solution Approach 1:
The catheter tip geometry is changed from a conventional half-pipe shape to a tapered shape with specific angle parameters (15-45 degrees). This parameter change in the tip configuration reduces vessel injury while maintaining deliverability, directly resolving the contradiction between reliability and harmful factors
Solution Approach 2:
The catheter is divided into distinct functional segments: a tapered tip portion for safe delivery, a mid-section for structural support, and a distal portion for equipment delivery. This segmentation allows each part to be optimized independently, reducing overall vessel injury while maintaining functionality
2Adaptability or versatility
If conventional catheters are used, then the catheter structure is simple, but it is difficult to deliver large equipment in heart arteries
Solution Approach 1:
The catheter incorporates a movable balloon that can be inflated and deflated dynamically. When inflated, the balloon expands the catheter's internal lumen capacity, enabling delivery of large equipment. When deflated, the catheter returns to its compact delivery configuration. This dynamic transformation resolves the contradiction between equipment delivery capability and structural simplicity
Solution Approach 2:
The balloon is nested within the catheter body, and equipment is nested within the balloon when inflated. This nested configuration allows large equipment to be delivered through a catheter that maintains a relatively simple external structure, resolving the contradiction between adaptability and device complexity
3Ease of operation
If a balloon is delivered into heart arteries using conventional catheters, then the intervention can proceed, but vessel injury or dissection occurs
Solution Approach 1:
The catheter tip is pre-formed with a tapered shape before delivery. This preliminary configuration of the tip geometry prepares the catheter for safe navigation through heart arteries, preventing vessel injury during the balloon delivery process while maintaining ease of operation
Solution Approach 2:
The tapered catheter tip acts as an intermediary element between the delivery system and the heart arteries. It mediates the interaction by providing a smooth transition that prevents direct trauma from the balloon or catheter body, thus enabling safe balloon delivery without vessel injury
Data Source
AI summary
The present disclosure discloses a guide extension catheter device. The catheter device includes an elongated body having at least one of a distal portion, a proximal portion, and a middle portion. The middle portion extends between the distal portion and the proximal portion. In an aspect, the distal portion comprises a first part and a second part. The first part is disposed at a distal end of the distal portion and the second part is disposed at a proximal end of the distal portion. The first part of the distal portion is cylindrical in shape and the second part is tapered such that a diameter of a second part proximal end is greater than a diameter of a second part distal end. The catheter device also integrates a built-in balloon at the first part of the distal end.