Catheter Port Yarn Guide Channel Prevents Interference
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Solution Overview
Problem
Conventional port fixation methods for catheters under the skin often result in yarn interference with the catheter, reducing the guiding lumen or pinching off the catheter, especially in small skin pockets where it's difficult to insert yarn through all fixing holes or multiple yarn sections are needed.
Innovation Solution
A yarn guide device is integrated into the port housing, featuring a guide channel between the membrane and the catheter, allowing the yarn to be securely placed without interfering with either, ensuring a defined path and preventing puncturing needle damage to the catheter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If yarn is used to fix the port through multiple fixing holes, then the port can be securely fixed to the patient's tissue, but the yarn may interfere with the catheter, reduce its guiding lumen, or pinch it off
Solution Approach 1:
The fixation system is segmented into multiple fixing holes arranged in a specific pattern, allowing the yarn to pass through separate locations. This segmentation enables the yarn to distribute fixation forces across multiple points while maintaining a path that avoids the catheter's route to the port cavity.
Solution Approach 2:
The yarn acts as an intermediary element between the port housing and the patient's tissue (fascia or skin). By routing the yarn through specifically positioned fixing holes and guiding it between the membrane and catheter, the intermediary yarn provides secure fixation while being spatially separated from the catheter to prevent interference.
2Reliability
If multiple yarn sections are used to fix the port, then complete fixation of all fixing holes is achieved, but the complexity of the fixation procedure increases
Solution Approach 1:
The port housing is designed with multiple fixing holes that can all be accessed and utilized by a single yarn section. This universal design allows one yarn to serve multiple fixation functions simultaneously, eliminating the need for multiple separate yarn sections and simplifying the fixation procedure while maintaining complete fixation coverage.
3Adaptability or versatility
If the port is fixed in small-sized skin pockets, then the port can be implanted in limited space, but it becomes difficult to insert yarn through all fixing holes or multiple yarn sections are needed
Solution Approach 1:
The fixing holes are arranged in an asymmetric pattern on the port housing, with at least one fixing hole positioned on each side of the catheter's path. This asymmetric arrangement allows the yarn to be routed through holes that are spatially distributed to accommodate small skin pockets, enabling complete fixation with a single yarn section even in limited implantation spaces.
Data Source
AI summary
A port (1) for a catheter comprises: a housing (10) having at least two fixing holes (120, 20A, 120B); a cavity (140) arranged in the housing (10) for receiving a fluid; a membrane (13) attached to the housing (10) and arranged on an opening (102) of the housing (10) for sealing the opening (102) such that the cavity (140) is enclosed in the housing (10) in a fluid-tight manner; and a catheter (2) connected to the housing (10), the catheter (2) being in fluid connection with the cavity (140). In addition a yarn guide device (16) is arranged on the housing (10) in between the membrane (13) and the catheter (2), the yarn guide device (16) comprising a guide channel (161) formed in the housing (10) for receiving a yarn (3) for fixing the port (1) to an object and for guiding the yarn (3) in between the membrane (13) and the catheter (2). In this way a port is provided which allows for an easy fixing of the port by means of a yarn and reduces the risk of the yarn interfering with the catheter attached to the port.