Wire Weave Percutaneous Retrieval End for Endovascular Device Capture
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Solution Overview
Problem
Current catheter-based technologies lack the capability to safely and effectively retrieve endovascular devices such as stents or valve prostheses from a subject's body, particularly in cases of misplacement or dislodgement, which can lead to complications requiring emergency surgery.
Innovation Solution
A percutaneous retrieval system comprising an outer sheath and an inner sheath with a distal retrieval end that can transition between compressed and expanded states, allowing for the capture and compression of endovascular devices within a subject's internal body space, utilizing a wire weave structure to transform linear pulling force into radial compressive force for device removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If endovascular devices are implanted percutaneously, then patient safety and recovery are improved, but device misplacement or dislodgement can occur requiring emergency surgery
Solution Approach 1:
The retrieval system acts as an intermediary tool that can be deployed through the catheter to capture and secure the endovascular device during implantation. This mediator mechanism prevents device misplacement complications by providing immediate retrieval capability without requiring emergency surgery.
Solution Approach 2:
The retrieval system is prepared and positioned in advance before device implantation is complete. The catheter and retrieval mechanism are pre-positioned so that if misplacement or dislodgement occurs, the device can be immediately captured and retrieved without delaying treatment or requiring emergency intervention.
2Adaptability or versatility
If retrieval systems are designed to capture large endovascular devices, then device removal capability is improved, but system complexity increases
Solution Approach 1:
The retrieval system employs a nested structure where the retrieval mechanism is contained within the catheter, which itself is inserted through the patient's vasculature. The retrieval components can be deployed from and returned to the catheter, allowing the system to adapt to different device sizes while maintaining a relatively simple overall structure.
Solution Approach 2:
The retrieval system is designed with universal components that can accommodate various types and sizes of endovascular devices. The catheter and retrieval mechanism can be adjusted or configured to retrieve different devices, reducing the need for multiple specialized systems and thereby managing complexity.
3Reliability
If the retrieval end is expanded to capture devices, then capture effectiveness is improved, but the profile size increases making catheter passage difficult
Solution Approach 1:
The retrieval end is designed with dynamic characteristics, transitioning from a compressed low-profile state for catheter passage to an expanded state for device capture. This dynamic transformation allows the system to achieve effective device capture while maintaining compatibility with the catheter delivery system throughout the procedure.
Solution Approach 2:
The retrieval system is segmented into distinct components: the catheter for delivery, the expandable retrieval end for capture, and the retrieval mechanism for device removal. This segmentation allows each component to be optimized independently - the retrieval end can expand for effective capture while the catheter maintains a small profile for easy passage.
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 safe and controlled removal of endovascular devices, reducing the need for emergency surgery by allowing for the capture and compression of devices, thereby facilitating their retrieval from the body.
Implementation Method 1
utilizing a wire weave structure to transform linear pulling force into radial compressive force for device removal
Data Source
AI summary
Disclosed are systems, methods, and devices for percutaneous retrieval of objects, such as endovascular devices, from an internal body space. The present inventions have vascular, non-vascular (gastrointestinal), and surgical (laproscopic) applications. The inventions include a a wire woven distal end that is formed from wires and includes a substantially cylindrical main body section comprising a leading end, a trailing end, and a middle portion extending between the leading end and the trailing end and defining a longitudinal axis of the main body section, and a flare defining a mouth of the wire woven distal end that projects circumferentially from the leading end of the main body section, wherein when at least a portion of the retrieval end is transitioned to a compressed state following capture of an object, the retrieval end exerts an inward force that at least partially collapses or compresses the object.