Shunt Tissue Capture Confirmation Using Impedance Feedback
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Solution Overview
Problem
Existing shunt devices for treating elevated pressure in the left atrium lack effective methods for confirming proper tissue capture, which can lead to improper placement and increased risks of paradoxical stroke.
Innovation Solution
A shunt device with conductive wires and a method using electrical impedance to determine tissue capture by deploying arms and measuring impedance between electrodes, ensuring secure anchoring in the tissue wall.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If electrical impedance measurement is implemented to confirm tissue capture, then placement accuracy is improved, but device complexity increases due to additional conductive wires and measurement circuitry
Solution Approach 1:
The conductive wires serve dual purposes: they are structural components for electrical connection and simultaneously function as measurement electrodes for impedance-based tissue capture detection. This multi-functionality reduces the need for separate measurement components, thereby limiting the increase in device complexity while achieving improved measurement precision.
2Strength
If arms are deployed to capture tissue wall, then anchoring strength is improved, but risk of improper placement increases without verification method
Solution Approach 1:
The electrical impedance measurement provides real-time feedback to confirm whether the arms have successfully captured the tissue wall. By measuring impedance between the conductive wires before and after arm deployment, the system detects tissue capture events, ensuring reliable placement verification and allowing corrective action if anchoring is improper.
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
Enhances the accuracy of tissue capture confirmation, reducing the risk of improper placement and paradoxical stroke by providing a reliable method for verifying secure anchoring of the shunt device.
Implementation Method 1
providing an alternating current signal to a first electrode, determining an electrical impedance between the first electrode and a second electrode
Data Source
AI summary
A device for determining tissue capture of a shunt device includes a delivery catheter and a shunt device disposed on the delivery catheter. The shunt device is configured to be inserted into a puncture in a tissue wall and includes a central flow tube extending from a first axial end to a second axial end, a first distal arm attached to the first axial end of the central flow tube, and a first proximal arm attached to the second axial end of the central flow tube. The first distal arm and the first proximal arm configured to capture the tissue wall therebetween. and the delivery catheter includes a first conductive wire and a second conductive wire. The first conductive wire is electrically connected to the shunt device and the second conductive wire is separated from the shunt device.