Distal Holding Section for Leadless Pacemaker Anchoring

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Solution Overview

Problem

Conventional leadless cardiac pacemakers face challenges in securing themselves within the beating heart, risking dislodgment due to the heart's functions, necessitating an anchoring mechanism to maintain their position effectively.

Innovation Solution

A delivery device with a distal holding section that applies a compressive force to the leadless pacing device using materials like heat shrink or resilient materials, ensuring secure engagement and frictional retention within the heart, allowing for stable deployment and anchoring.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a leadless cardiac pacemaker is implanted in the beating heart, then the device can perform cardiac pacing function, but the device risks dislodgment due to heart contraction and movement

Engineering Contradiction:

Improveposition stabilityVSAvoiddislodgment risk

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The delivery device applies compressive force to the pacemaker device before implantation to pre-engage the frictional retention mechanism. This preliminary action ensures that when the device is deployed into the beating heart, the compressive force is already in place to prevent dislodgment from heart contraction and movement

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The delivery device acts as an intermediary that applies and maintains compressive force on the pacemaker device during implantation. This intermediary mechanism enables secure engagement without requiring direct mechanical anchoring to heart tissue, reducing dislodgment risk while maintaining pacing reliability

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If a compressive force is applied to secure the leadless pacing device, then the device engagement is secured, but the delivery device complexity increases

Engineering Contradiction:

Improvedevice engagementVSAvoiddelivery device structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The delivery device utilizes changes in compressive force parameters to secure the pacemaker device. By controlling the magnitude and application of compressive force rather than complex mechanical structures, the device achieves secure engagement while keeping the delivery system relatively simple

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent replaces complex mechanical anchoring systems with a friction-based retention mechanism activated by compressive force. This substitution simplifies the delivery device structure while maintaining reliable device engagement through frictional forces generated by the applied compression

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 solution provides a secure and stable deployment mechanism for leadless pacing devices, minimizing the risk of dislodgment and ensuring effective anchoring within the heart, facilitating reliable cardiac pacing.

Implementation Method 1

the distal holding section comprises a heat shrink material that applies the compressive force to the outer peripheral surface of the leadless pacing device

Methodology Applied

Scientific EffectThermal contraction: Thermal Contraction

Implementation Method 2

the distal holding section comprises a resilient material that applies the compressive force to the outer peripheral surface of the leadless pacing device, for example a resilient material that elastically deforms when the leadless pacing device is disposed in the cavity

Methodology Applied

Scientific EffectElastic deformation: Elasticity

Data Source

PatentUS10722723B2Delivery devices and methods for leadless cardiac devices

Publication Date: 2020.07.28 CARDIAC PACEMAKERS INC

AI summary

Delivery devices, systems, and methods for delivering an implantable leadless pacing device having an outer peripheral surface are disclosed. An example delivery device may include a proximal section including a distal end, and a distal holding section extending distally of a distal end of the proximal section. The distal holding section defines a cavity therein for receiving the implantable leadless pacing device, and may be configured to apply a holding force to the implantable leadless pacing device. In some cases, the distal holding section may be configured to apply a compressive force to the outer peripheral surface of the leadless pacing device when the leadless pacing device is disposed in the cavity.