Continuous Reinforced Catheter Shaft Wire Frame Design
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Solution Overview
Problem
Current medical sheaths face challenges with vascular access bleeding and kinking issues due to their design, which affects the efficiency and reliability of medical procedures.
Innovation Solution
The development of a continuous reinforced catheter shaft with multiple wire frames, where the wire frame includes a coiled or braided design with a denser wire disposition at the distal portion, and the use of an annealed segment to enhance the spring temper and reduce kinking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the outer diameter of the sheath is reduced to minimize vascular access bleeding, then the sheath becomes more flexible and easier to insert, but the sheath becomes more prone to kinking and structural failure
Solution Approach 1:
The patent employs a composite construction combining a flexible polymer sheath material with an embedded wire frame reinforcement. This composite structure allows the sheath to maintain small outer diameter for reduced vascular access bleeding while the wire frame provides structural support to prevent kinking and maintain reliability.
Solution Approach 2:
The wire frame is positioned specifically within the sheath structure at locations where kink resistance is most critical. This localized reinforcement approach maintains overall flexibility for insertion while providing targeted structural support to prevent kinking, resolving the contradiction between small diameter and kink resistance.
2Reliability
If a wire frame is added to reinforce the sheath and prevent kinking, then the structural strength and kink resistance are improved, but the outer diameter increases causing more vascular access bleeding
Solution Approach 1:
The patent uses a thin-walled flexible polymer sheath as the base structure, which minimizes the outer diameter to reduce vascular access bleeding. The wire frame is embedded within this thin wall structure, providing reinforcement without significantly increasing the outer diameter, thus resolving the contradiction between strength and bleeding minimization.
Solution Approach 2:
The wire frame is nested within the sheath wall structure, with the reinforcing wire positioned inside the polymer material. This nested configuration allows the wire frame to provide structural support while being contained within the sheath's outer boundary, preventing significant increase in outer diameter and thus minimizing vascular access bleeding.
3Manufacturing precision
If individual medical sheaths are formed separately using conventional methods, then each sheath can be customized and quality controlled, but the manufacturing efficiency and productivity are reduced
Solution Approach 1:
The patent forms a continuous sheath structure containing multiple wire frames along its length, which can then be cut into individual sheath segments. This segmentation approach allows efficient continuous manufacturing of multiple sheaths from a single process run while maintaining quality control through consistent wire frame placement and sheath formation, resolving the contradiction between manufacturing efficiency and quality control.
Solution Approach 2:
The manufacturing process forms a continuous sheath with continuous wire frame reinforcement in a single operation, rather than assembling individual components. This continuous formation process improves manufacturing efficiency and productivity while maintaining consistent quality through uniform material deposition and reinforcement placement throughout the entire sheath length.
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
This solution reduces vascular access bleeding by minimizing the outer diameter of the sheath while maintaining a strong, kink-resistant structure, enhancing the reliability and efficiency of medical procedures.
Implementation Method 1
the use of an annealed segment to enhance the spring temper and reduce kinking
Data Source
AI summary
The present disclosure describes systems and methods of forming a continuous reinforced catheter shaft having multiple wire frames. A method includes providing of a first spool having a liner rolled thereon and unrolling at least a portion of the liner from the first spool. The method also includes coiling a reinforcing wire on at least the portion of the liner unrolled from the first spool to form a plurality of coiled wire frames and an interim portion of the reinforcing wire coiled adjacent coiled wire frames. The method also includes securing a jacket over the plurality of coiled wire frames and the interim portion of the reinforcing wire coiled to form a continuous shaft having the plurality of coiled wire frames.