His Bundle Lead Delivery Catheter With 3D Hooked Tip Positioning
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Solution Overview
Problem
Conventional cardiac pacing therapies struggle to replicate the synchronous contractions of the heart's natural conduction system by targeting the bundle of His, as direct stimulation at the right ventricle apex results in slower propagation and asynchronous activation.
Innovation Solution
A catheter system is designed to deliver a medical electrical lead to the bundle of His from the right atrium, featuring a unique hook portion with specific curved configurations to facilitate precise placement and stabilization, allowing for direct stimulation of the bundle of His through a transvascular approach.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If direct stimulation is applied at the right ventricle apex, then the pacing therapy can be implemented, but the propagation speed is slower and activation becomes asynchronous
Solution Approach 1:
The catheter with hook portion serves as an intermediary device to deliver the electrical lead from the right atrium to the bundle of His, enabling indirect stimulation of the ventricle through the specialized conduction system. This mediator approach allows synchronous activation by stimulating the His bundle directly rather than the ventricle apex, resolving the contradiction between implementation feasibility and propagation speed.
2Measurement precision
If a transvascular approach is used to target the bundle of His, then precise placement can be achieved, but the device complexity increases
Solution Approach 1:
The catheter is segmented into distinct functional portions: a straight portion for vascular access, a hook portion with curved segments for positioning, and a lumen for lead delivery. This segmentation allows each component to perform its specific function optimally while maintaining overall manageability. The hook portion's multi-segment curved design enables precise angular adjustment to target the bundle of His from the right atrium.
Solution Approach 2:
The catheter design incorporates three-dimensional spatial configuration with the hook portion extending in multiple directions from the straight portion. The curved portions allow the catheter to navigate through the right atrium and position the opening perpendicular to the atrioventricular septum, adding dimensional freedom to achieve precise target placement without excessive complexity.
3Stability of the object's composition
If the hook portion is designed with specific curved configurations, then placement stability is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The hook portion employs curved geometries with specific radii of curvature (first curved portion with larger radius, second curved portion with smaller radius) to achieve the desired spatial configuration. These curved designs provide mechanical flexibility for stable placement while the curvature parameters can be manufactured using standard forming techniques, balancing stability requirements with manufacturing feasibility.
Data Source
AI summary
A catheter for delivering a medical electrical lead to a bundle of His from within a right atrium of a heart. The catheter includes a straight portion and a hook portion projecting from a distal end of the straight portion. The hook portion includes a first curved portion, a second curved portion, and a third curved portion. The straight portion and the first curved portion define a plane. The second curved portion extends from a distal end of the first curved portion. The second curved portion curves away from the plane. The third curved portion extends from a distal end of the second curved portion. The third curved portion curves toward the plane. The catheter forms a lumen extending from a proximal end of the straight portion to an opening at a distal end of the third curved portion.