Multi-Lumen Distal Tip Structure for Stronger Tube Joints

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Solution Overview

Problem

Medical devices with multiple lumens face issues of joint strength failure between tubular bodies, particularly when used in procedures involving sensors for ultrasonic imaging, which can lead to detachment and compromise safety and efficiency.

Innovation Solution

A medical device design that integrates multiple tubes with reinforced joints using heat-shrinkable tubes and outer tubes to enhance the structural integrity of the lumens, ensuring stable operation during procedures.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple tubes are joined together to form multiple lumens, then the device can perform multiple functions (ultrasonic imaging and therapeutic operations), but the joint strength between tubes becomes insufficient and may detach during use

Engineering Contradiction:

Improvemultiple functionsVSAvoidjoint strength

Core Design Contradiction:

Adaptability or versatilityVSStrength

Solution Approach 1:

The patent combines multiple tubular bodies into a single integrated structure where the first tube and second tube are joined through the distal tip. The distal tip acts as a common structural element that merges the two separate lumens, ensuring they move and function together as one unit rather than separate components that could detach.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent employs a nested configuration where the first tube and second tube are positioned concentrically or adjacently within the distal tip structure. The distal tip encompasses both tubes, creating a nested arrangement that reinforces their connection and prevents relative movement that could lead to detachment.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Device complexity

If the second tubular body is joined to the distal end of the first tubular body, then the device structure is simplified, but the joint may fail under stress or during procedural use

Engineering Contradiction:

Improvedevice structureVSAvoidjoint reliability

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The distal tip is designed and positioned in advance to receive and secure both the first tube and second tube before the device is inserted into the body. This preliminary structural arrangement ensures that the tubes are properly aligned and connected through the distal tip, preventing joint failure during the actual procedure.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent employs a composite structure where the distal tip serves as a reinforcing element that combines with both tubular bodies. This composite arrangement at the distal end creates a stronger, more reliable connection point that distributes mechanical stress across multiple components rather than relying on a single weak joint.

Inventive Principle:

Principle #40Composite materials

Data Source

PatentUS20260069244A1Medical device and method for manufacturing medical device

Publication Date: 2026.03.12 ASAHI INTECC CO LTD

AI summary

A medical device includes a distal tip, a first tube that has a first lumen, a distal end of the first tube being located closer to a distal end side than a proximal end of the distal tip and on an inner peripheral side of the distal tip, and a second tube that has a second lumen and is in contact with the distal tip.