Handle Assembly Threaded Mechanism for LAA Occlusion
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Solution Overview
Problem
Current methods for reducing thrombus formation in the left atrial appendage, such as pharmacological therapies and invasive surgical procedures, are inadequate due to side effects and unsuitability for all patients, particularly those with compromised conditions or previous cardiac surgery, necessitating a minimally invasive solution.
Innovation Solution
A handle assembly for a left atrial appendage occlusion device delivery system comprising a non-rotating and rotatable catheter displacement component with a threaded mechanism, allowing for the deployment and retrieval of an occlusion device within the left atrial appendage, enabling minimally invasive occlusion of the thrombus formation site.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If invasive surgical or thorascopic techniques are used to obliterate the LAA, then the effectiveness of thrombus prevention is improved, but the risk to patient safety and suitability increases due to compromised conditions or previous cardiac surgery
Solution Approach 1:
The patent replaces invasive surgical mechanical systems with a minimally invasive delivery system that uses a catheter-based approach. The occlusion device is delivered through a catheter inserted via a peripheral vessel, eliminating the need for open surgical incisions and reducing patient risk while maintaining thrombus prevention effectiveness
Solution Approach 2:
The patent introduces a delivery catheter as an intermediary tool that bridges the gap between the operator and the LAA occlusion device. This intermediary allows for precise device placement within the LAA without requiring direct surgical access, thereby reducing patient exposure to surgical risks
2Manufacturing precision
If a threaded mechanism is used for catheter displacement, then the precision of device deployment is improved, but the device complexity increases
Solution Approach 1:
The handle assembly is segmented into distinct functional components: a rotatable component with internal threads, a catheter with external threads, and a delivery catheter. This segmentation allows each component to perform its specific function independently while working together to achieve precise device deployment through rotational motion
Solution Approach 2:
The threaded mechanism converts rotational motion into linear displacement through periodic engagement of threads. Each rotation of the handle assembly produces a controlled, periodic advancement or retraction of the delivery catheter, enabling precise positioning of the occlusion device within the LAA
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
Facilitates the safe and effective deployment of a left atrial appendage occlusion device, reducing the risk of thrombus formation and stroke in patients with atrial fibrillation, while being suitable for patients unsuitable for traditional surgical procedures.
Implementation Method 1
the second rotatable catheter displacement component portion of the lumen comprises an internally threaded segment; a first manipulation segment having a externally threaded tubular distal extension adapted to rotationally engage the internally threaded segment
Data Source
AI summary
The disclosure pertains to a handle assembly for a left atrial appendage occlusion device delivery system and methods of use therefor. The handle assembly includes a leadscrew mechanism for smooth, low backlash control of a delivery catheter for the left atrial appendage occlusion device and manipulation segments which allow one hand operation of the handle assembly.