Detachable Leadless Pacemaker for Stable Dual-Chamber Bundle Pacing

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Solution Overview

Problem

Existing wireless miniature pacemakers face challenges in maintaining stability and effective contact with cardiac tissue due to detachment and displacement within the cardiac chamber, particularly in the atrium, limiting dual-chamber pacing and increasing the risk of complications.

Innovation Solution

A detachable leadless pacemaker system with a first and second pacemaker body, each equipped with hook-shape side electrodes and detachable structures, connected via signal wires for power and communication, allowing for stable ventricular and atrial pacing by increasing contact surface area and utilizing annular electrodes for improved stability and signal sensing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a wireless miniature pacemaker is implanted in a cardiac chamber, then the need for wires and electrodes is eliminated, but the pacemaker tends to detach and displace due to heartbeat and blood flow

Engineering Contradiction:

Improvesimplicity of implantationVSAvoidstability of pacemaker position

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

A transport tool is used to deliver the pacemaker to the target position before release, ensuring proper positioning is achieved before the pacemaker is freed from the tool

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

A transport tool acts as an intermediary device to carry the pacemaker through the vasculature and position it at the target site, then is detached to leave the pacemaker in place

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If a spiral wire or hook is used to fix the pacemaker, then the pacemaker can be anchored to myocardium, but the lack of reticular tissue in atrium prevents atrial pacing

Engineering Contradiction:

Improvefixation stabilityVSAvoidcapability for dual-chamber pacing

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The pacemaker system is designed with universal applicability to both ventricular and atrial chambers, using the same device architecture but adapted to different anatomical locations and pacing requirements

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The fixation approach is adapted to local anatomical characteristics - using myocardial anchoring in the ventricle where reticular tissue exists, and alternative positioning strategies in the atrium where such tissue is absent

Inventive Principle:

Principle #3Local quality

3Volume of moving object

If the pacemaker is made small for minimally invasive implantation, then patient recovery is improved, but the contact surface area with myocardium is reduced

Engineering Contradiction:

Improvesize of pacemakerVSAvoidcontact stability with tissue

Core Design Contradiction:

Volume of moving objectVSReliability

Solution Approach 1:

The electrode contacts are arranged in a circumferential pattern around the pacemaker body, utilizing the radial dimension to maximize contact surface area despite the small overall device volume

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The pacemaker has a capsule-shaped design with curved surfaces that allow circumferential electrode arrangements, maximizing contact area within a compact volume

Inventive Principle:

Principle #14Spheroidality (Curvature)

Data Source

PatentUS12544580B2Detachable leadless pacemaker system for cardiac conduction bundle pacing

Publication Date: 2026.02.10 GUO CHENGJUN

AI summary

A detachable leadless pacemaker system for cardiac conduction bundle pacing is disclosed. The system includes a detachable leadless pacemaker and a passive leadless pacemaker. A hook-shape side electrode is inserted into a ventricular septum for cardiac conduction bundle pacing. The detachable leadless pacemaker may be arranged in a ventricle, and the passive leadless pacemaker may be arranged in an atrium, so as to realize dual-chamber pacing both in the ventricle and in the atrium. The detachable leadless pacemaker is coupled with the passive leadless pacemaker by an anti-tension reinforced wire, which is used for pulling back the detachable leadless pacemaker to a new position.