Leadless Pacing Device Anchoring and Anti-Rotation Design

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Solution Overview

Problem

Conventional cardiac pacemakers with leads can become dislodged during heart function, necessitating a secure anchoring mechanism for leadless pacing devices to prevent dislodgment and ensure effective cardiac pacing.

Innovation Solution

The design of a leadless cardiac pacing device with a housing having a distal region equipped with anchoring members, such as helical anchoring members, and anti-rotation members to securely attach and stabilize the device within the heart, preventing unwanted rotation and dislodgment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If leadless pacing devices are used to eliminate leads, then device simplicity and patient comfort are improved, but the risk of dislodgment increases

Engineering Contradiction:

Improvedevice simplicityVSAvoiddislodgment risk

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The device is segmented into distinct functional components: a header portion for anchoring and a body portion for pacing function. The anchoring members are separate elements that can be independently deployed to secure the device, allowing the pacing function to remain simple while the anchoring system provides secure attachment to cardiac tissue.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Anchoring members are deployed in advance during the implantation procedure to secure the device to the cardiac tissue before the pacing function is activated. This preliminary anchoring action ensures the device is firmly positioned and cannot dislodge during subsequent heart function.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If anchoring members are added to secure the device, then dislodgment prevention is improved, but device complexity increases

Engineering Contradiction:

Improvedislodgment preventionVSAvoiddevice complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The anchoring members are integrated with the header portion of the device, merging the anchoring function with the existing structural component. This combination approach allows secure anchoring without adding completely separate systems, thereby limiting the increase in overall device complexity while maintaining reliable dislodgment prevention.

Inventive Principle:

Principle #5Merging (Combining)

3Stability of the object's composition

If anti-rotation members are added to prevent rotation, then positional stability is improved, but device complexity increases

Engineering Contradiction:

Improvepositional stabilityVSAvoiddevice complexity

Core Design Contradiction:

Stability of the object's compositionVSDevice complexity

Solution Approach 1:

Anti-rotation members are added only to specific locations on the device where rotational control is needed, rather than throughout the entire device. This localized approach provides the necessary positional stability to prevent rotation while minimizing the overall increase in device complexity by limiting the number and distribution of anti-rotation features.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS10842993B2Leadless cardiac pacing devices

Publication Date: 2020.11.24 CARDIAC PACEMAKERS INC

AI summary

Implantable leadless pacing devices and medical device systems including an implantable leadless pacing device are disclosed. An example implantable leadless pacing device may include a pacing capsule. The pacing capsule may include a housing. The housing may have a proximal region and a distal region. A first electrode may be disposed along the distal region. An anchoring member may be coupled to the distal region. One or more anti-rotation members may be fixedly attached to the distal region.