Heart Valve Delivery Shaft Bias for Commissure Alignment

Solution Overview

Problem

The challenge of aligning commissures of a prosthetic heart valve with native commissures during transcatheter procedures is difficult due to limited visualization of the surgical field, making it hard to ensure proper rotational alignment, which can lead to coronary obstruction and suboptimal valve function.

Innovation Solution

A delivery device with an inner and outer shaft, featuring a distal sheath and a spine that biases the outer shaft to bend in a predetermined direction, allowing for precise alignment of prosthetic commissures with native commissures by exploiting the geometry of the aortic arch, and a mechanism for controlled deployment and repositioning of the prosthetic valve.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a collapsible prosthetic heart valve is delivered via catheter through the aortic arch, then the procedure is less invasive and avoids open-heart surgery, but the limited visualization of the surgical field makes it difficult to align the prosthetic commissures with the native commissures

Engineering Contradiction:

Improveinvasiveness of procedureVSAvoidalignment precision of commissures

Core Design Contradiction:

Ease of operationVSMeasurement precision

Solution Approach 1:

The delivery device is pre-configured with a bend in a predetermined direction before reaching the implantation site. This preliminary geometric configuration exploits the natural geometry of the aortic arch to passively guide the prosthetic valve into rotational alignment with the native commissures during delivery, eliminating the need for complex active alignment mechanisms and reducing the skill level required for proper alignment.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The delivery device automatically achieves commissure alignment through its pre-configured bend that exploits the aortic arch geometry. The system self-aligns as it navigates through the aortic arch, with the bend causing the prosthetic commissures to naturally confront the outer radius of the arch and align with native commissures without requiring active manipulation or complex control mechanisms by the operator.

Inventive Principle:

Principle #25Self-service

2Productivity

If the prosthetic valve is deployed without precise commissure alignment, then the deployment process is simpler and faster, but the risk of coronary obstruction increases and valve function becomes suboptimal

Engineering Contradiction:

Improvedeployment speedVSAvoidrisk of coronary obstruction

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The delivery device is pre-configured with a bend in a predetermined direction before reaching the implantation site. This preliminary geometric configuration exploits the natural geometry of the aortic arch to passively guide the prosthetic valve into rotational alignment with the native commissures during delivery, eliminating the need for complex active alignment mechanisms and reducing the skill level required for proper alignment.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The delivery device automatically achieves commissure alignment through its pre-configured bend that exploits the aortic arch geometry. The system self-aligns as it navigates through the aortic arch, with the bend causing the prosthetic commissures to naturally confront the outer radius of the arch and align with native commissures without requiring active manipulation or complex control mechanisms by the operator.

Inventive Principle:

Principle #25Self-service

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

Enables accurate rotational alignment of prosthetic heart valve commissures with native commissures, reducing the risk of coronary obstruction and ensuring proper valve function, even in minimally invasive procedures.

Implementation Method 1

A delivery device with an inner and outer shaft, featuring a distal sheath and a spine that biases the outer shaft to bend in a predetermined direction, allowing for precise alignment of prosthetic commissures with native commissures by exploiting the geometry of the aortic arch

Methodology Applied

Scientific EffectGeometry: Geometry

Data Source

PatentUS20260090886A1Passive Alignment of Commissures in Prosthetic Heart Valve Implantation

Publication Date: 2026.04.02 ST JUDE MEDICAL CARDILOGY DIV INC

AI summary

A delivery device for a collapsible prosthetic heart valve includes an inner shaft, an outer shaft, and a distal sheath. The distal sheath may be disposed distal to the outer shaft and about a portion of the inner shaft to form a compartment with the inner shaft. The compartment may be sized to receive the prosthetic heart valve. The inner shaft and the distal sheath may be movable relative to one another. A spine may extend along the outer shaft, the spine biasing the outer shaft so that the outer shaft tends to bend in a pre-determined direction.