Leadless Left-Bundle-Branch Pacemaker With Adjustable Implant Core
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Solution Overview
Problem
Current leadless pacemakers can only pace the right ventricle and cannot achieve physiological pacing, leading to long-term heart failure and atrial fibrillation in patients with cardiac dysfunction due to altered ventricular activation sequences.
Innovation Solution
A leadless left-bundle-branch pacemaker with an implant core that can be rotated out from a case to reach the subendocardial left-bundle-branch area of the left ventricle, featuring a fixing end for myocardial wall attachment and adjustable length to accommodate varying interventricular septum thickness, allowing for dual bundle branch pacing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a leadless pacemaker contacts only the right ventricle myocardium, then the device structure is simple and implantation is easier, but physiological pacing cannot be achieved and long-term heart failure risk increases
Solution Approach 1:
The pacemaker is divided into two functional segments: a right ventricular pacing electrode and a left bundle branch pacing electrode. This segmentation allows the device to perform both right ventricular pacing and physiological left bundle branch pacing, resolving the contradiction between simple structure and effective pacing by separating the pacing functions into distinct components.
Solution Approach 2:
The leadless pacemaker is designed with multi-functionality to serve multiple pacing purposes. It can pace both the right ventricle and the left bundle branch, making it a universal pacing solution that addresses both traditional right ventricular pacing needs and physiological pacing requirements, thereby improving pacing efficacy without requiring multiple separate devices.
2Device complexity
If the implant core length is fixed, then the device structure is simpler, but it cannot accommodate varying interventricular septum thickness in different patients
Solution Approach 1:
The implant core is designed with dynamic adjustability, allowing its effective length to be modified after implantation. The core can be extended or retracted to accommodate different interventricular septum thicknesses in various patients, providing adaptability without requiring completely different device designs for different patient anatomies.
Solution Approach 2:
The device allows adjustment of the implant core length parameter to match the specific anatomical requirements of each patient. By changing the effective length parameter of the implant core, the device can be adapted to varying septum thicknesses while maintaining a relatively simple base structure.
Data Source
AI summary
The present disclosure belongs to the technical field of artificial cardiac pacemakers, and particularly relates to a leadless left-bundle-branch pacemaker. The leadless left-bundle-branch pacemaker comprises a case and an implant core, wherein the implant core is coaxially arranged inside the case, and a head of the implant core can be rotated out from the inside of the case; the implant core has an implant end that can be rotated out from the inside of the case, and the length of the implant end rotated out from the inside of the case is greater than 10 mm; and an end of the case corresponding to the implant end is provided with a fixing end for fixing the pacemaker.