Guidewire Receiving Member Torque Transmission
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Solution Overview
Problem
Intravascular medical procedures require precise positioning of devices within the body, often necessitating multiple instruments with built-in positioning mechanisms, increasing complexity, cost, and time, especially when dealing with tortuous anatomy and multiple access routes.
Innovation Solution
An intravascular device delivery system featuring a flexible elongated member with a distal cap that is atraumatic and longitudinally movable relative to an outer sleeve, allowing for precise deployment and positioning of intravascular devices, including stents, valves, and filters, using a guidewire receiving member with torque transmission features for controlled delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple instruments with built-in positioning mechanisms are used for precise device positioning, then positioning precision is improved, but device complexity and procedural time increase
Solution Approach 1:
The patent combines multiple positioning functions into a single delivery system. The outer sleeve and distal cap work together as an integrated positioning mechanism, where the distal cap's longitudinal movement relative to the outer sleeve provides precise device positioning without requiring separate positioning instruments. This merging reduces the number of components and simplifies the overall system while maintaining positioning precision.
Solution Approach 2:
The delivery system is designed with multi-functional components. The distal cap serves multiple purposes: it provides atraumatic tissue interaction, enables longitudinal movement for positioning, and works with the guidewire receiving member for controlled device delivery. This multi-functionality eliminates the need for separate specialized instruments, reducing complexity while maintaining precise positioning capability.
2Measurement precision
If multiple instruments with positioning mechanisms are used for navigating tortuous anatomy, then navigation precision is improved, but procedural time and complexity increase
Solution Approach 1:
The delivery system incorporates dynamic components that can move relative to each other. The distal cap can move longitudinally relative to the outer sleeve, and the guidewire receiving member can move relative to the distal cap. This dynamic configuration allows the system to adapt to tortuous anatomy and achieve precise navigation in a single integrated procedure, reducing the time required compared to using multiple separate positioning instruments.
3Manufacturing precision
If an atraumatic distal cap is made longitudinally movable relative to the outer sleeve for precise deployment, then deployment precision is improved, but device complexity increases
Solution Approach 1:
The delivery system uses a nested configuration where the distal cap is positioned within the outer sleeve, and the guidewire receiving member is nested within the distal cap. This nested structure allows precise longitudinal movement of the distal cap relative to the outer sleeve for controlled device deployment while maintaining a compact and relatively simple overall design. The nesting arrangement enables precise positioning without requiring complex external mechanisms.
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 precise and efficient delivery of intravascular devices with reduced risk of tissue damage and procedural complexity, facilitating navigation through tortuous anatomy and allowing for both deployment and retrieval of devices within the body.
Implementation Method 1
guidewire receiving member with torque transmission features for controlled delivery
Data Source
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AI summary
An intravascular device delivery system (100) has an elongated member (102) with an outer sleeve (114) and a distal cap (112) longitudinally fixed to a guidewire receiving member (116). The guidewire receiving member is moveable longitudinally relative to the outer sleeve to move the distal cap relative to the outer sleeve.