Collapsible Medical Closing Device for Minimally Invasive Sealing
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Solution Overview
Problem
Existing medical devices for sealing body openings, such as those in the heart or blood vessels, often require suturing and are not deliverable via standard over-the-wire techniques, leading to invasive procedures and increased risk of infection.
Innovation Solution
A collapsible medical closing device that can travel over a catheter or guide wire, featuring disc-shaped sections with an intermediate shaft, made from shape memory alloys or biodegradable materials, allowing for radial retraction and sealing of openings without suturing, and can be customized for various catheter sizes with self-closing fasteners.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a collapsible closing device is used to seal body openings, then the invasiveness of the procedure is reduced and infection risk is lowered, but the device complexity increases due to the need for specialized delivery mechanisms
Solution Approach 1:
The collapsible closing device is nested within a delivery catheter in a compressed state during delivery. The device features a collapsible structure with radially extendable elements that can be contained within the catheter lumen and then expanded at the target site, enabling percutaneous delivery without open surgery and reducing infection risk.
Solution Approach 2:
The closing device transitions from a compressed, deliverable state to an expanded, functional state at the target site. The radially extendable elements dynamically change configuration from a low-profile delivery form to a high-profile sealing form, allowing the device to be delivered through small punctures while maintaining sealing effectiveness.
2Ease of operation
If standard over-the-wire techniques are used for delivery, then the ease of operation is improved, but the adaptability to different catheter sizes is limited
Solution Approach 1:
The closing device is designed with a universal delivery mechanism that can accommodate various catheter sizes and configurations. The collapsible structure with adjustable radial elements can be delivered through different types of catheters and adapted to various vessel diameters, making the device versatile for different anatomical situations while maintaining ease of percutaneous delivery.
Solution Approach 2:
The device allows for parameter changes in its delivery configuration, enabling it to be adapted to different catheter sizes. The collapsible structure can be compressed to different degrees and configured for various delivery catheter diameters, while the radially extendable elements can be adjusted to match different target site dimensions, providing versatility without compromising ease of operation.
3Reliability
If suturing methods are used to close defects, then the reliability of sealing is improved, but the invasiveness and procedure time are increased
Solution Approach 1:
The sealing function is built into the closing device structure itself, with radially extendable elements pre-configured to provide sealing upon deployment. This eliminates the need for separate suturing steps, as the device achieves sealing through its inherent mechanical expansion and engagement with the vessel wall, thereby maintaining reliability while significantly reducing procedure time.
Solution Approach 2:
The suturing function is extracted from the overall sealing process and replaced by the integrated sealing mechanism of the collapsible device. The radially extendable elements provide the sealing action that would otherwise require sutures, allowing the device to achieve reliable closure without the time-consuming suturing step while maintaining sealing effectiveness.
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
Enables safer, more reliable, and less invasive medical interventions by allowing for the delivery of objects through body openings with reduced risk of infection and fewer invasive procedures, while providing a cost-effective solution for sealing a wide range of openings.
Implementation Method 1
featuring disc-shaped sections with an intermediate shaft, made from shape memory alloys or biodegradable materials, allowing for radial retraction
Data Source
Figure 1~2
Figure 3a~3b
Figure 4a~5
AI summary
The disclosure is related to the sealing of an opening in a body, e.g. a blood vessel or a human heart. In particular the disclosure relates to a collapsible medical closing device, a method and a medical system for delivering an object. Furthermore, the disclosure provides positioning of an object and sealing a gap of an opening in a body with one single piece of equipment. In one embodiment, a collapsible medical closing device (1) for closing a body opening, which comprises: a network of at least one thread (6), wire or fiber, and a closeable through channel in said network having an opening (12) for receiving an elongated unit therein for delivery of said collapsible medical closing device (1) over said elongated unit, wherein said elongated unit is a sheath, is provided.