Leadless Pacing Device Anchoring Members Compound Curvature
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Solution Overview
Problem
Conventional pacemakers with leads can become dislodged from the heart during its functioning, necessitating a secure anchoring mechanism for leadless cardiac pacing devices to maintain their position.
Innovation Solution
The implementation of a leadless cardiac pacing device with anchoring members featuring a compound curved structure that can shift between configurations for secure attachment and repositioning, utilizing a delivery catheter for deployment and retrieval, and incorporating electrodes for electrical stimulation and sensing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If anchoring members are designed to securely anchor the device to heart tissue, then device stability is improved, but tissue penetration and potential tissue damage increase
Solution Approach 1:
The anchoring members incorporate a compound curved structure with multiple radii of curvature, creating a J-shaped or hook-like configuration. This curvature allows the anchoring members to engage heart tissue through a hooking action rather than deep penetration, achieving stable anchoring while minimizing tissue damage and irritation.
Solution Approach 2:
The anchoring members are designed to shift between different configurations - a first configuration when the device is within the delivery catheter and a second configuration when deployed. This dynamic transformation allows the anchoring members to transition from a compact state during delivery to an expanded, curved state for anchoring, enabling secure attachment while controlling tissue interaction.
2Reliability
If anchoring members are designed for secure attachment, then device stability is improved, but device repositioning capability deteriorates
Solution Approach 1:
The anchoring members are designed with dynamic transformation capability, allowing them to shift between a first configuration during delivery and a second configuration during anchoring. This same dynamic property enables reversible or adjustable anchoring, facilitating device repositioning if needed while maintaining stable attachment during normal operation.
Solution Approach 2:
The anchoring members are pre-configured in a first configuration that facilitates easy deployment from the delivery catheter. Once deployed, they transform to a second configuration that provides secure anchoring. The preliminary configuration and transformation mechanism allow for controlled anchoring that can be adjusted or reversed if repositioning is required.
3Strength
If anchoring members use deep penetration to secure the device, then anchoring strength is improved, but tissue irritation and device retrieval difficulty increase
Solution Approach 1:
The compound curved structure with multiple radii of curvature creates a hook-like configuration that achieves anchoring through mechanical engagement rather than deep penetration. The curved geometry allows the anchoring members to catch and hold onto heart tissue folds or surface structures, providing strong anchoring with minimal tissue disruption.
Solution Approach 2:
Instead of using sharp, penetrating tips to anchor the device, the anchoring members use a curved, hook-like configuration that engages tissue from the outside. This inverted approach - using curvature rather than sharpness - achieves strong anchoring while significantly reducing tissue penetration and associated irritation or damage.
Data Source
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. One or more anchoring members may be coupled to the distal region. The anchoring members may each include a region with a compound curve.