Detachable Coil Anchor for Stable Transvascular Puncture
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Solution Overview
Problem
Existing medical procedures face challenges in puncturing from one vessel to another, particularly due to the lack of effective anchoring mechanisms, which can lead to difficulties in creating fluid pathways or shunts, especially in conditions like pulmonary hypertension where high pressures complicate the process.
Innovation Solution
The use of anchoring mechanisms, such as sharpened coils and stents, to facilitate puncturing and dilation between vessels, with features like hoop stress induction and rotational deployment to secure the catheter and create conduits, along with release mechanisms for detachable implants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional puncture devices are used without anchoring mechanisms, then the device structure is simple, but the reliability of puncturing and stability during the procedure deteriorates due to high pressures and tissue movement
Solution Approach 1:
The anchoring mechanism is deployed before the puncture procedure to secure the catheter in place. The anchor extends into the tissue wall to prevent displacement during puncturing and dilation, ensuring stable positioning before the actual intervention begins.
Solution Approach 2:
The anchoring mechanism serves as an intermediary element between the catheter and the tissue wall. It provides a stable interface that transfers forces during puncturing and dilation while maintaining catheter position, acting as a mediator that enhances reliability without requiring direct catheter-tissue attachment.
2Ease of operation
If high pressures are present in the target vessel (e.g., pulmonary hypertension), then the physiological condition is severe, but the ease of puncturing and creating fluid pathways deteriorates due to tissue resistance and vessel wall tension
Solution Approach 1:
The anchoring mechanism is deployed beforehand to secure the catheter and pre-position the puncture site. This preliminary stabilization reduces tissue movement and allows for more controlled puncturing despite high vessel pressures, making the procedure easier to perform.
Solution Approach 2:
The high vessel wall tension present in pulmonary hypertension, which normally resists puncturing, is converted into a beneficial anchoring force. Once the anchor engages the tissue, the high pressure helps maintain the anchor's grip and stabilizes the catheter position, turning the harmful high-pressure environment into an asset for securing the device.
3Manufacturing precision
If the catheter is not securely anchored to the tissue, then the device structure is simple, but the precision of puncturing and creation of stable fluid pathways deteriorates due to catheter displacement
Solution Approach 1:
The anchoring mechanism is deployed before the puncture to establish precise catheter positioning. The anchor secures the catheter to the tissue wall, preventing displacement during the puncture procedure and ensuring that the puncture occurs at the intended location with high precision.
Solution Approach 2:
The anchoring mechanism acts as an intermediary that provides a stable reference point for the puncture procedure. It mediates between the catheter and tissue, ensuring precise alignment and positioning while allowing the puncture needle to accurately penetrate at the desired location without catheter movement.
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
These mechanisms enable precise and effective puncturing and dilation between vessels, reducing the risk of tissue damage and facilitating the creation of stable fluid pathways or shunts, thereby addressing the challenges of high-pressure environments in medical procedures like the Glenn Procedure.
Implementation Method 1
The sharpened coil anchors the catheter to the targeted tissue to facilitate puncturing of the targeted tissue with the needle
Implementation Method 2
the stent configured to induce hoop stress in the targeted vessel
Implementation Method 3
a dilation device that is configured to open the tissue and to create a conduit between both vessels
Data Source
AI summary
Puncture and anchor devices are disclosed that facilitate puncturing through a wall of a second vessel from a first vessel. The anchor can be delivered in a catheter or other delivery device and then released after puncturing through the vessel walls. The anchor can remain in the tissue, acting as a shunt. The devices and methods disclosed herein relate to a puncture device that includes a sharpened coil; a needle configured to extend from the distal end of the catheter through a central axis of the sharpened coil, wherein the sharpened coil anchors the catheter to the targeted tissue to facilitate puncturing of the targeted tissue with the needle. The needle comprises a dilation device that is configured to open the tissue and to create a conduit between both vessels. The sharpened coil is detachable from the catheter.