Catheter Accessory Expandable Balloon Occlusion
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Solution Overview
Problem
Catheters face challenges in delivering treatment fluids to specific sites within the body without undesired migration or reflux along the catheter, which can lead to ineffective treatment and distribution of embolic materials.
Innovation Solution
The development of catheter accessory devices with an expandable member, such as a balloon, that can be inflated to occlude the body lumen at specific positions, allowing for targeted delivery of treatment fluids while preventing reflux, using an elongate delivery member and inflation lumen for fluid communication and mechanical expansion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a catheter is used to deliver treatment fluid to a specific site, then the treatment can be targeted to that site, but undesired migration or reflux of the treatment fluid can occur proximally around the outside of the catheter
Solution Approach 1:
An expandable member (balloon) is introduced as an intermediary element between the catheter and the body lumen. When inflated, this balloon creates a physical barrier that prevents treatment fluid from migrating proximally around the catheter, while allowing the catheter itself to remain in place for targeted delivery
Solution Approach 2:
The delivery system is segmented into distinct functional components: the catheter for targeted fluid delivery, the expandable member for containment, and the delivery system for positioning. This segmentation allows each component to perform its specific function optimally - the catheter maintains positioning precision while the expandable member provides containment reliability
2Reliability
If an expandable member is added to prevent fluid migration, then fluid containment is improved, but the device complexity increases
Solution Approach 1:
The expandable member is merged with the catheter assembly as an integrated unit. The balloon is positioned at the distal end of the catheter and can be inflated through the catheter's lumen, combining the containment function with the existing delivery structure rather than requiring a completely separate system
Solution Approach 2:
The expandable member transitions from a compressed delivery state to an expanded functional state. During delivery, the balloon remains collapsed within the catheter, minimizing profile and complexity. At the treatment site, it expands to provide containment, then can be deflated and removed, allowing the device to adapt its complexity to the operational phase
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 enhances the precision and effectiveness of delivering treatment fluids, such as embolic materials, by ensuring they remain at the intended treatment site, reducing unwanted distribution and improving treatment outcomes.
Implementation Method 1
an inflation lumen extending between a proximal end and a distal end of the elongate delivery member, and the inflation lumen may be in fluid communication with the expandable member
Data Source
AI summary
The present disclosure, in its various aspects, is directed generally to medical devices, and more specifically to catheter accessory devices and related systems and methods. In an embodiment, an instrument accessory device may include a body with an instrument lumen through which an instrument may extend through. An expandable member may be disposed about the distal end of the body. An elongate delivery member may be attached to the body and in communication with the expandable member at a distal end of the delivery member. The delivery member may be configured to slide the instrument lumen of the body and the expandable member along the length of the instrument when extended therethrough. Other embodiments are addressed within.