Sub-pericardial Sack Deployment via Segmented Umbrella Framework
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Solution Overview
Problem
Current methods for treating congestive heart failure are invasive and inefficient, particularly in deploying and positioning cardiac assist devices around the heart, which hinders effective minimally invasive procedures.
Innovation Solution
A method and device for deploying a passive restraint mesh cardiac assist device into the pericardial space using a delivery system with elongate arms and filaments to position and secure the device around the heart, allowing for minimally invasive deployment and tensioning, utilizing fluoroscopic and endoscopic techniques to minimize invasiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional open sternotomy procedures are used to deploy the mesh, then the mesh can be securely positioned around the heart, but the invasiveness of the procedure increases significantly
Solution Approach 1:
The deployment device is divided into multiple elongate arms that can be independently inserted through separate small incisions. Each arm can be positioned and manipulated separately to achieve proper mesh deployment around the heart without requiring a large open incision, thus reducing procedural invasiveness while maintaining secure positioning.
Solution Approach 2:
The elongate arms are disposed within a delivery device that guides their insertion and deployment. The arms can be nested within each other or within the delivery device catheter, allowing them to be introduced through a single access point or multiple small incisions, minimizing tissue disruption while enabling reliable mesh positioning.
2Object-affected harmful factors
If endoscopic tools and techniques are used to deploy the jacket, then the invasiveness is reduced, but ideal positioning of the jacket around the heart becomes problematic
Solution Approach 1:
The system incorporates imaging guidance (fluoroscopic and endoscopic techniques) that provides real-time feedback on the position and orientation of the elongate arms and mesh during deployment. This allows the operator to visually confirm proper positioning and make adjustments as needed, achieving precise jacket placement while maintaining minimally invasive access.
Solution Approach 2:
The elongate arms are designed to be flexible and adaptable, allowing them to conform to the dynamic shape of the heart during deployment. The arms can be manipulated into various configurations to accommodate heart movement and anatomical variations, ensuring ideal jacket positioning without requiring rigid, invasive fixation structures.
Data Source
AI summary
Various methods and devices for deploying a sub-pericardial sack about at least a portion of a heart to alleviate congestive heart failure. A medical device housing the sub-pericardial sack is inserted into the pericardial sack. An inverted umbrella framework is deployed through the medical device and into the pericardial sack to position the sub-pericardial sack adjacent the heart. The umbrella framework is then retracted through the medical device once the cardiac assist device is placed adjacent the heart. A steerable catheter can instead be deployed through the pericardial sack to deploy and position a cardiac assist device, such as a mesh, around the heart. The steerable catheter is covered by a sheath housing the cardiac assist device. Once the sheath is pulled back, the cardiac assist device is deployed and secured adjacent the heart. Filaments or tensions wires are used to tighten the mesh around the heart.