Multi-Lumen Catheter Tube Layout for Guiding Catheter Space
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Solution Overview
Problem
Existing medical devices with multiple lumens face limitations in accommodating a large number of auxiliary devices due to the restricted size of the guiding catheter lumen, which is a common issue across various bodily systems, including the vascular, lymphatic, biliary, urinary, respiratory, digestive, and reproductive systems.
Innovation Solution
A medical device design featuring a first tube with a first lumen, a second tube with a second lumen, and a third tube with a third lumen, where the outer peripheral surfaces of the first and second tubes are joined in a way that the area enclosed by a common external tangent line is less than or equal to the area enclosed by the outer periphery of the combined tubes, allowing for increased space for auxiliary devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple tubes are arranged side-by-side in a conventional circular cross-section, then each tube maintains its structural integrity, but the overall device occupies excessive space within the guiding catheter lumen
Solution Approach 1:
The patent applies asymmetry by configuring the tubes in a non-circular arrangement where at least one tube has a flat side facing another tube, creating an asymmetric cross-sectional shape. This asymmetric configuration reduces the overall cross-sectional area of the medical device while maintaining the structural integrity of individual tubes, allowing better space utilization within the guiding catheter lumen.
Solution Approach 2:
The patent implements nesting by allowing one tube to be positioned within the concave region formed by another tube's flat side configuration. This nested arrangement enables compact packing of multiple tubes, reducing the external cross-sectional area while preserving internal lumens for auxiliary devices, thereby solving the space constraint problem within the guiding catheter.
2Object-affected harmful factors
If the guiding catheter lumen size is reduced to improve patient safety and comfort, then insertion trauma is minimized, but the space available for auxiliary devices is restricted
Solution Approach 1:
By采用 asymmetric tube arrangement with flat sides, the patent reduces the external cross-sectional area of the medical device, enabling insertion through a smaller guiding catheter lumen. This minimizes insertion trauma to the patient while the asymmetric configuration efficiently utilizes the available internal space, maintaining capacity for auxiliary devices.
Solution Approach 2:
The patent transitions from conventional circular cross-sectional arrangement to a multi-dimensional asymmetric configuration where tubes are positioned in different spatial orientations with flat sides facing each other. This dimensional reorganization maximizes space utilization within the constrained lumen, allowing multiple auxiliary devices to pass through while maintaining patient safety.
3Reliability
If tubes are joined with large external dimensions to ensure structural stability, then device reliability is improved, but interference between multiple devices increases
Solution Approach 1:
The asymmetric tube configuration with flat sides reduces the external dimensions of the combined tube structure, minimizing interference between multiple devices within the guiding catheter. The flat-side arrangement creates efficient packing that maintains structural stability at the junction while reducing the overall footprint, thereby decreasing harmful interference effects.
Data Source
AI summary
This medical device comprises: a first tube having a first lumen and a second tube having a second lumen. An outer peripheral surface of the first tube and an outer peripheral surface of the second tube are joined, and in a transverse cross-section at a predetermined position in a longitudinal direction of the medical device, a first area enclosed by an outer periphery of the medical device is less than or equal to a second area enclosed by both a single common external tangent line of the first tube and the second tube, and a contour line formed by an outer periphery of the first tube and the second tube.