Occlusion Device Balloon Struts Rapid Cavity Sealing

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Solution Overview

Problem

Existing occlusion devices for body cavities, such as blood vessels, often require significant time for effective occlusion due to the need for blood clots or tissue growth, and existing plug-style devices are bulky and rely on thrombosis for reliable occlusion, leaving patients at risk during this period.

Innovation Solution

A medical device comprising a hub with extendable struts and an expandable balloon that can be inflated to occlude a body cavity, with the struts anchoring to the cavity wall and the balloon contacting the wall to prevent fluid flow, utilizing biocompatible materials and designs to prevent migration.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If embolization coils are used to occlude a body cavity, then tissue growth and clot formation occur over time, but effective occlusion is delayed significantly leaving the patient at risk

Engineering Contradiction:

Improveocclusion effectivenessVSAvoidtime to achieve occlusion

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The device divides the occlusion function into two segments: an immediate mechanical occlusion component (balloon) and a long-term sealing component (coils). The balloon provides instant blockage while coils are deployed to promote tissue growth, separating the timing of immediate and long-term occlusion functions.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The balloon is inflated before coil deployment to establish immediate occlusion. This preliminary action blocks blood flow upfront, preventing the delayed occlusion problem associated with coils alone, while creating a controlled environment for subsequent coil integration and tissue growth.

Inventive Principle:

Principle #10Preliminary action

2Loss of time

If plug-style occlusion devices are used to provide physical barrier to blood flow, then blood flow is blocked more quickly, but the devices are bulky and often require thrombosis for reliable occlusion

Engineering Contradiction:

Improvetime to stop blood flowVSAvoiddevice size and structure

Core Design Contradiction:

Loss of timeVSDevice complexity

Solution Approach 1:

The device nests the balloon within the delivery catheter and positions coils within or adjacent to the balloon structure. This nested arrangement allows compact delivery through small catheters while enabling expansion to large occlusion dimensions at the target site, resolving the bulkiness problem.

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The device transitions from a compressed delivery state to an expanded functional state. The balloon inflates and struts deploy to transform the device from a small deliverable form to a large occlusive form, allowing quick occlusion without requiring a permanently bulky structure.

Inventive Principle:

Principle #15Dynamics

3Reliability

If occlusion devices rely on thrombosis to obtain reliable occlusion, then effective sealing is achieved, but patients remain at risk during the thrombosis formation period

Engineering Contradiction:

Improveocclusion reliabilityVSAvoidpatient injury risk during transition period

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The balloon provides a pre-established mechanical barrier before thrombosis occurs. This cushioning effect protects the patient during the vulnerable transition period by maintaining occlusion through physical blockage rather than relying solely on the尚未-formed thrombus.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Solution Approach 2:

The device merges mechanical occlusion (balloon) with biological occlusion (coils promoting thrombosis and tissue growth). This combination ensures that while thrombosis develops, the mechanical balloon maintains occlusion, and when thrombosis is complete, the balloon can be deflated or removed, leaving the reliable biological seal.

Inventive Principle:

Principle #5Merging (Combining)

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 rapidly and effectively occludes body cavities by expanding to physically block fluid flow, reducing the risk of injury and eliminating fluid flow quickly, with the balloon's inflation and anchoring mechanisms ensuring stability and preventing migration within the cavity.

Implementation Method 1

The expandable balloon is inflated to contact the wall of the body cavity so that the cavity is occluded and fluid flow eliminated

Methodology Applied

Scientific EffectPressure: Pressure Increase

Implementation Method 2

The barbs can act to prevent migration of the inflated balloon when it is positioned within the cavity

Methodology Applied

Scientific EffectMechanical interlocking: Mechanical Fastener

Data Source

PatentUS10004512B2Occlusion device and method of use thereof

Publication Date: 2018.06.26 COOK BIOTECH INC

AI summary

One aspect of the present invention provides a device for occluding a body cavity. In one embodiment, the occlusion device includes include a hub extending from an upstream end to a downstream end and along a central axis. A number of struts are attached to the upstream end and extend upstream from the hub. An expandable balloon is attached to the downstream end and extending downstream from the hub. Another aspect of the present invention provides a method for occluding fluid flow within in a body cavity including placing an occlusion device within the body cavity.