Dialysis Catheter Fixing Means With Dynamic Opening Part
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Solution Overview
Problem
Existing catheters for long-term dialysis face challenges with centering means interfering with movement and the need for hygienic replacement or removal of fixing means near the catheter entry point.
Innovation Solution
A catheter design featuring a fixing means with a receiving part and an opening part that can be moved from an opening to a closing position for secure attachment and detachment, utilizing eyelets for sewing and a latching mechanism to prevent accidental opening, allowing for easy replacement and secure fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed fixing means is used to secure the catheter, then the catheter is securely fixed, but it cannot be easily replaced or removed for hygienic reasons
Solution Approach 1:
The fixing means incorporates a dynamic opening part that can transition between open and closed positions. In the closed position, it provides secure fixation comparable to traditional fixed fixing means. In the open position, it allows easy removal and replacement of the catheter for hygienic reasons. This dynamic capability resolves the contradiction between secure fixation and ease of replacement.
2Manufacturing precision
If centering means are used to position the catheter, then positioning is achieved, but they interfere with the movement of the catheter
Solution Approach 1:
The patent removes traditional centering means from the catheter design. Instead, positioning is achieved through the geometry of the fixing means itself, which is attached to the catheter after insertion. This extraction of centering means eliminates the interference with catheter movement while maintaining positioning capability through the fixing means structure.
3Reliability
If additional securing components are used to prevent accidental opening, then security is improved, but device complexity increases
Solution Approach 1:
The latching mechanism is integrated into the opening part itself, merging the securing function with the existing structure. The latching section and counter-latching section are part of the opening part, eliminating the need for separate securing components. This integration provides accident prevention while maintaining simplicity of the overall device.
Data Source
AI summary
A catheter for dialysis for long-term application features a proximal end for introducing into a blood vessel, a distal end for extracting blood and for introducing purified blood, and a fixing member surrounding a tube section for fixing the catheter on the patient. The fixing member has a receiving part and an opening part, wherein, with respect to the receiving part, the opening part can be moved from an opening position, in which the tube section is insertable into the fixing member, into a closing position, in which the tube section is fixed in the fixing member.