Vessel Isolation Device With Blood-Impermeable Sleeve
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vascular treatment devices face challenges in efficiently isolating a vessel space from blood flow without occluding it, often requiring cumbersome hardware and risking fluid leakage, especially with balloon-based systems that are not self-expanding.
Innovation Solution
A reversibly expandable vessel isolation device with a blood-impermeable sleeve, allowing selective transformation between collapsed and expanded states, creating an isolated treatment space without the need for balloon inflation, enabling blood flow and reducing handling complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If balloon-based isolation devices are used, then vessel space can be isolated from blood flow, but the devices require additional hardware connections and risk fluid leakage
Solution Approach 1:
The patent extracts the sealing function from the balloon inflation system and relocates it to a self-expanding mesh structure. The mesh body itself provides the sealing mechanism through its expansion against the vessel wall, eliminating the need for separate balloon components and their associated inflation hardware. This extraction of the sealing function resolves the contradiction by maintaining isolation reliability while reducing device complexity.
Solution Approach 2:
The mesh body is designed to be self-expanding through its inherent structural properties. When deployed, the mesh automatically expands to engage with the vessel wall and create the isolation space without requiring external inflation systems. This self-service mechanism eliminates the need for complex balloon inflation hardware while maintaining reliable isolation, directly resolving the technical contradiction.
2Reliability
If balloon-based isolation devices are used, then vessel space can be isolated, but they require additional care to assure fluid tight seals and pose risk of fluid leakage
Solution Approach 1:
The patent removes the balloon component entirely and replaces it with a self-expanding mesh structure that provides sealing through its own expansion. This extraction eliminates the complex manufacturing requirements associated with balloon catheters, including the need to assure fluid tight seals during manufacture. The mesh structure's sealing capability is inherent in its design, simplifying manufacturing while maintaining seal reliability.
Solution Approach 2:
The mesh body inherently provides its own sealing function through its self-expanding mechanism. The structure automatically engages with the vessel wall upon deployment, creating a reliable seal without requiring additional manufacturing processes to assure fluid tightness. This self-service approach simplifies manufacturing while ensuring consistent seal performance.
3Reliability
If conventional isolation devices with balloons are used, then vessel space can be isolated, but they are not self-expanding and require complex manipulation
Solution Approach 1:
The mesh body is designed to be self-expanding, automatically deploying its isolation structure upon release from the delivery catheter. This eliminates the need for complex balloon inflation manipulation and reduces handling requirements. The self-expanding mechanism provides reliable isolation while significantly improving ease of operation by removing the need for manual balloon control.
Solution Approach 2:
The mesh structure transitions from a compressed delivery state to an expanded isolation state through its inherent dynamic properties. This dynamic self-expansion eliminates the need for static balloon inflation systems, simplifying operation while maintaining effective isolation. The mesh naturally adapts its shape and size during deployment, improving handling ease compared to rigid balloon-based systems.
4Ease of operation
If blood flow is blocked upstream of the aneurysm for treatment, then device placement is possible, but excessive blood loss occurs
Solution Approach 1:
The device segments the vessel into distinct zones: an isolated treatment space where the aneurysm is accessed, and preserved blood flow paths upstream and downstream. The mesh structure creates a localized isolation zone that allows treatment access without requiring complete upstream occlusion. This segmentation enables treatment accessibility while minimizing blood loss by maintaining flow in non-treated segments.
Solution Approach 2:
The mesh body acts as an intermediary structure that enables treatment access to the aneurysm without requiring complete upstream blood flow blockage. The self-expanding mesh creates a controlled isolation mechanism that mediates between the need for treatment accessibility and the need to preserve blood flow. This intermediary structure allows device placement and treatment while minimizing excessive blood loss.
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 effectively isolates a vessel space for treatments like bypass surgery, aneurysm occlusion, and stenosis therapy, minimizing blood loss and fluid leakage risks while being easier to manufacture and use, with improved reliability and convenience.
Implementation Method 1
A reversibly expandable vessel isolation device with a blood-impermeable sleeve, allowing selective transformation between collapsed and expanded states
Data Source
AI summary
The device utilizes a reversibly expandable body partially covered by a blood impermeable sleeve. The device has a low profile collapsed state for delivery and a expanded state for deployment. The impermeable sleeve extends from a proximal portion to a distal portion of the expandable body and generally follows the contour of the expandable body. When deployed, the device is configured in the expanded state and has a generally hourglass, or dumbbell shape. In the expanded state, portions of the sleeve adjacent to the proximal and distal portions are placed in apposition to a vessel wall and blood is free to flow through the expandable body via inlets and outlets provided in the proximal and distal portions. As a result, an isolated treatment space is created that surrounds the device between the vessel wall and the blood impermeable sleeve adjacent to the neck portion of the expandable body.