Catheter Anchoring Mesh Braid Stability
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Solution Overview
Problem
Current catheter technologies face challenges in maintaining stability, particularly in tortuous vascular paths and stenotic lesions, leading to repeated attempts, increased risk, and cost due to guide catheter dislodgment and reflux of chemotherapeutic agents during interventions like stent placement and chemotherapy delivery.
Innovation Solution
A catheter with an anchoring device featuring a tubular mesh braid that expands to stabilize the tip, allowing controlled blood flow and reflux prevention, utilizing a permeable and impermeable mesh design to secure the catheter within the vessel wall and direct flow effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a guide catheter is inserted to stabilize the catheter tip during interventions, then the reliability of the procedure is improved, but the device complexity increases due to the need for additional anchoring mechanisms
Solution Approach 1:
The catheter is divided into functional segments: a collapsible anchoring element at the distal tip, a middle section with controlled permeability, and a proximal delivery catheter. The anchoring element can be independently collapsed or expanded to provide stability when needed, while maintaining a simple profile during delivery.
Solution Approach 2:
The catheter incorporates a dynamically collapsible anchoring element that can transition between expanded and collapsed states. When expanded, it provides enhanced stability against vessel wall resistance; when collapsed, it maintains a low-profile delivery configuration, allowing the catheter to adapt to different procedural phases.
2Reliability
If the catheter tip is stabilized by expanding an anchoring mechanism, then the stability is improved, but the blood flow through the vessel is restricted
Solution Approach 1:
The catheter employs selective permeability at different segments: the distal anchoring element can be collapsed to minimize flow restriction, while the middle section maintains controlled permeability to allow blood flow. This localized quality control ensures stability where needed while preserving hemodynamics elsewhere.
Solution Approach 2:
The catheter incorporates a middle section with controlled permeability that allows blood flow to pass through while providing structural support. This porous design enables the catheter to maintain stability without completely occluding the vessel, balancing anchoring strength with physiological flow requirements.
3Device complexity
If a traditional catheter is used without anchoring, then the device complexity is reduced, but the catheter tip dislodgment risk increases during lesion crossing
Solution Approach 1:
The catheter is pre-configured with a collapsible anchoring element that can be deployed in advance to secure the catheter tip position before advancing through the lesion. This preliminary anchoring action prevents dislodgment during the subsequent high-resistance crossing phase, ensuring reliable delivery.
Solution Approach 2:
The dynamic collapsible anchoring element transitions from a compressed delivery state to an expanded anchored state, providing stability precisely when needed during lesion crossing. This dynamic adaptation allows the catheter to maintain simplicity during delivery while achieving reliability during the critical intervention phase.
4Quantity of substance
If the catheter allows free blood flow through the anchoring region, then the blood flow is maintained, but the anchoring stability is reduced
Solution Approach 1:
Different segments of the catheter have different permeability characteristics: the distal anchoring element can be collapsed to provide stability, while the middle section maintains controlled permeability for blood flow. This local differentiation allows the catheter to simultaneously achieve anchoring stability and maintain hemodynamics in different regions.
Solution Approach 2:
The collapsible anchoring element dynamically adjusts its state based on procedural needs: collapsed during delivery to maintain flow, and expanded during anchoring to provide stability. This dynamic control allows the catheter to optimize both blood flow and stability at different phases of the procedure.
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
The anchoring device enhances the stability of the catheter tip, reduces the risk of dislodgment, and minimizes reflux, enabling more precise and safe delivery of medications and devices, such as stents, while maintaining effective blood flow and distribution of chemotherapeutic agents.
Implementation Method 1
A catheter with an anchoring device featuring a tubular mesh braid that expands to stabilize the tip
Implementation Method 2
utilizing a permeable and impermeable mesh design to secure the catheter within the vessel wall and direct flow effectively
Data Source
AI summary
The present invention relates to a catheter apparatus with an anchoring device to stabilize the catheter tip when in use, such as when infusing, injecting, or delivering substances, devices or other catheters into a patient. The apparatus according to various embodiments deploys an anchoring device that stabilizes the catheter tip and enables adjustment of the blood flow during use.