Nested Delivery System Sealing and Flushing
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Solution Overview
Problem
Intravascular medical procedures face challenges in ensuring precise positioning and deployment of devices due to issues with air or unwanted fluid trapped in delivery systems, which can compromise the accuracy and safety of procedures.
Innovation Solution
The development of methods and systems for sealing and flushing delivery members, including the use of CO2 to remove air and fluid from lumens, and a multi-layered delivery member with nested catheters and sheaths, ensures that no air or unwanted fluid is trapped during delivery through the vasculature, allowing for precise and safe deployment of interventional devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the delivery system uses multiple nested lumens and catheters to enable device delivery and recapture, then the functionality and versatility of the procedure is improved, but the complexity of the delivery system increases and creates more potential pathways for air or fluid entrapment
Solution Approach 1:
The patent implements a nested delivery system where an inner catheter is positioned within an outer sheath, creating multiple concentric lumens. This nested structure allows the delivery system to perform multiple functions (device delivery, recapture, and flushing) while maintaining a compact configuration that can navigate tortuous vasculature.
Solution Approach 2:
The delivery system is divided into separate functional segments including the outer sheath, inner catheter, and flushing lumen. Each segment can be independently controlled and flushed, allowing targeted removal of air or fluid from specific regions of the system without affecting other components.
2Reliability
If CO2 flushing is used to remove air and unwanted fluid from the delivery system lumens, then the safety and precision of device delivery is improved, but the additional time and procedural steps required worsen procedural efficiency
Solution Approach 1:
The flushing lumen is pre-configured within the delivery system before the procedure begins, with access points positioned to allow CO2 injection proximal to the target site. This preliminary preparation enables rapid flushing when needed without requiring additional setup time during the procedure.
Solution Approach 2:
The system utilizes pneumatic flushing with CO2 gas injected through the flushing lumen to remove air and unwanted fluid from the delivery system. The gas flows through the lumens and exits at distal access points, effectively clearing the system without requiring complex mechanical pumping 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
This solution ensures the effective and safe delivery of interventional devices by preventing air emboli and ensuring precise positioning, reducing the risk of complications and improving procedural efficiency.
Implementation Method 1
flushing a fluid from the one or more lumens
Data Source
AI summary
A method for sealing and flushing a delivery member includes sealing one or more lumens and flushing air from the one or more lumens. An interventional device delivery system includes a handle assembly and a delivery member. The handle assembly includes a catheter holder with a passageway therethrough. A flush block is associated with the catheter holder and has a flush port and a flush chamber. The delivery member is associated with the handle assembly and includes a plurality of catheters. At least one of the catheters has a proximal end disposed within the passageway in the catheter holder and is in fluid communication with the flush chamber.