Intravascular Device with Swelling Material for Rapid Occlusion

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Solution Overview

Problem

Existing intravascular indwelling medical devices take too long to occlude a desired site within a blood vessel.

Innovation Solution

The device includes a mesh-form main body part and a water-absorbing swelling material disposed within the main body part, which swells upon absorbing water to occlude the blood vessel more quickly.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of time

If a conventional intravascular indwelling medical device is used, then the device structure is simple, but the occlusion time is long

Engineering Contradiction:
Improveocclusion timeVSAvoiddevice structure
Core Design Contradiction:
Loss of timeVSDevice complexity

Solution Approach 1:

The device combines a mesh-form main body part with a water-absorbing swelling material to create a composite structure. The swelling material (such as hydrogel or polysaccharide-based materials) is disposed within the mesh cage and absorbs water from the surrounding environment, causing rapid expansion and swelling that achieves quick occlusion of the blood vessel. This composite approach enables fast occlusion while maintaining device stability.

Inventive Principle:
Principle #40Composite materials

2Speed

If the water-absorbing swelling material is added to the device, then the occlusion speed increases, but the device complexity increases

Engineering Contradiction:
Improveocclusion speedVSAvoiddevice structure
Core Design Contradiction:
SpeedVSDevice complexity

Solution Approach 1:

The water-absorbing swelling material is nested within the mesh-form main body part. The swelling material is disposed inside the cage structure, allowing it to be contained and controlled within the existing device framework. This nesting approach enables the swelling material to expand rapidly for quick occlusion while being constrained within the mesh cage, preventing uncontrolled expansion and maintaining structural integrity.

Inventive Principle:
Principle #7Nested doll (Nesting)

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

The device can occlude a desired site within a blood vessel in a shorter time due to the rapid swelling of the water-absorbing material, combined with the mesh-form main body part that is securely locked to the inner wall of the blood vessel.

Implementation Method 1

a water-absorbing swelling material that is disposed within the main body part and swells upon absorbing water

Methodology Applied
Scientific EffectWater absorption: Absorption (physical)

Data Source

PatentUS20250152174A1Intravascular indwelling medical device
Publication Date: 2025.05.15 SB KAWASUMI LABORATORIES INC
  • US20250152174A1 patent drawing
  • US20250152174A1 patent drawing
  • US20250152174A1 patent drawing

AI summary

The present invention provides an intravascular indwelling medical device having a structure capable of occluding a desired site within a blood vessel in a shorter time. An intravascular indwelling medical device (100) of the present invention is an intravascular indwelling medical device that dwells within a blood vessel (360) to occlude the blood vessel (360). The intravascular indwelling medical device (100) includes a mesh-form main body part (10) and a water-absorbing swelling material (20) that is disposed within the main body part (10) and swells upon absorbing water.