Angled Anastomosis Device for Beating Heart Sutureless Connection
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Solution Overview
Problem
Conventional coronary artery bypass graft (CABG) procedures face challenges such as increased risk of emboli, mechanical damage to blood cells, and difficulty in performing sutureless anastomoses, especially during beating heart procedures, due to the need for manual suturing and the use of heart-lung bypass machines.
Innovation Solution
A device and method for performing an angled anastomosis between tubular conduits using a unitary structure with radially extending members and buckling struts that orient at specific angles, allowing for intima-to-intima contact without exposed metal, facilitating a sutureless connection that can be performed endoscopically and without cardiopulmonary bypass.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual suturing is used to perform anastomoses, then the connection between graft and vessel can be established, but the procedure becomes time-consuming and requires significant surgical skill and dexterity
Solution Approach 1:
The patent replaces the manual suturing mechanical system with a sutureless compression anastomosis device that uses radial compression force to create an immediate seal and connection between the graft and vessel, eliminating the need for time-consuming manual needle and thread manipulation
Solution Approach 2:
The anastomosis device performs the connection function automatically through its compression mechanism, where the device itself creates the seal and connection without requiring external manual suturing actions by the surgeon
2Ease of operation
If heart-lung bypass machine is used to stop the heart for CABG procedures, then surgical access and visualization are improved, but the risk of emboli and mechanical damage to blood cells increases
Solution Approach 1:
The patent replaces the heart-lung bypass machine system with a sutureless compression device that can perform anastomoses on the beating heart, eliminating the need for cardiopulmonary bypass and associated risks while maintaining surgical capability through the specialized compression mechanism
Solution Approach 2:
The invention extracts the anastomosis function from the context of stopped-heart surgery with heart-lung bypass, creating a standalone sutureless compression device that operates independently during beating heart procedures, removing the need for the harmful heart-lung bypass system
3Ease of operation
If aortotomy is performed to access the aorta for anastomosis, then direct access to the vessel is achieved, but the risk of dislodging plaque and causing emboli increases
Solution Approach 1:
The anastomosis device is nested within a delivery catheter that can be advanced through the vasculature to the target site, allowing percutaneous access without the need for open aortotomy, thereby avoiding plaque dislodgment while maintaining the ability to perform the anastomosis
4Reliability
If conventional anastomosis devices are used, then connection between conduits can be established, but metal exposure to blood flow causes thrombosis and closure problems
Solution Approach 1:
The anastomosis device uses a flexible membrane or thin film structure that allows the creation of a seal and connection without exposing metal surfaces to blood flow, thereby preventing thrombosis and clotting while maintaining connection reliability through the flexible sealing mechanism
Data Source
AI summary
Anastomosis devices, tools and methods of performing angled sutureless anastomosis. Devices provided are adapted to be oriented at an acute angle to a host vessel or organ, thereby orienting a graft to be anastomosed to the host by the same angle. The device maintains the angular orientation as it is compressed to join the graft and host.