Adjustable Device Delivery System With Internal Door
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing medical and non-medical device delivery systems face challenges in deploying devices at angles different from the lumen or space they are passed through, often resulting in device dislodgement and tissue damage during removal, due to inflexible designs and limited adjustability.
Innovation Solution
An adjustable device delivery system featuring a flexible tubular body with an internal door that can be hingedly coupled and adjusted to deflect devices at user-defined angles, allowing for precise placement and retention of device orientation during and after deployment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If external steerable devices are used to direct devices at angles, then the distal end can be steered by torque forces, but the device no longer maintains a low-profile and cannot fit safely inside narrow passageways
Solution Approach 1:
The delivery system is divided into multiple segments: a steerable catheter with a distal tip for navigation, a delivery wire for controlling the stent, and a separate stent deployment mechanism. This segmentation allows each component to perform its specific function independently, enabling the distal tip to be steered while maintaining the overall low-profile configuration needed for narrow passageways.
Solution Approach 2:
A delivery wire serves as an intermediary element that transmits control forces from the proximal end to the distal tip of the steerable catheter. This wire-based control mechanism enables precise angular control of the distal tip without requiring the entire catheter to bend, thus maintaining the low-profile shape while achieving steerability.
2Adaptability or versatility
If the distal end of the steerable catheter is torqued and bent at an angle, then device delivery at angles is achieved, but the distal tip projects outside the narrow passageway and creates high risk of focal perforation
Solution Approach 1:
The system separates the steering function (distal tip control) from the delivery function (stent deployment). The steerable catheter delivers the stent to the target location at the desired angle, while the stent itself is deployed radially outward from the catheter tip, eliminating the need for the catheter to maintain a bent configuration during stent deployment and reducing tissue injury risk.
Solution Approach 2:
The stent is pre-loaded onto the delivery wire in a compressed state within the steerable catheter. The delivery wire is then advanced to the target location, and the stent is deployed radially outward from the catheter tip. This preliminary loading and controlled deployment mechanism enables angular delivery without requiring the catheter to remain bent, thereby reducing the risk of focal perforation.
3Ease of manufacture
If internal deflection devices are used with fixed internal collision, then device deflection at fixed angles is achieved, but the system is not adjustable and requires multiple separate lumens
Solution Approach 1:
The system replaces fixed internal deflection mechanisms with a dynamic, wire-based steering approach. The delivery wire can be manipulated to create variable torque forces at the distal tip, allowing the delivery angle to be adjusted dynamically during the procedure. This dynamic control eliminates the need for multiple separate lumens and provides versatility in achieving different delivery angles.
Data Source
AI summary
Herein are described components and use of an adjustable device delivery system including an adjustable internal door which allows angled deployment of medical devices, non-medical devices and electromagnetic radiation. In one embodiment, a slotted outer cannula is used with an inner drive cannula to guide the motion of an adjustable interior door that allows delivery of devices, such as medical instruments, at user-defined angles. The invention also provides device delivery systems that permit withdrawal of the adjustable device delivery system without disruption of a device placed therewith. The device delivery systems of the invention are provided having a steering system that permits exact control of the angle of the adjustable internal door while providing support against longitudinal forces. Also provided are embodiments of the devices of the invention comprising a locking system that provides frictional resistance to overcome unwanted displacement of the door angle and drive system when, for example, manipulation of the device delivery system during its use increases the forces applied to the door surface. The invention further provides methods for using the device delivery systems provided herein for delivering or receiving electromagnetic waves by deflection or reflection of such radiation by the adjustable internal door. The invention also provides methods for steering a device or device delivery system within a confined space.