Magnetic Compression Anastomosis Devices
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Solution Overview
Problem
Current magnetic compression devices for forming anastomoses in the body are limited by their invasive delivery methods, difficulty in controlling magnetic attraction, and short-term patency of formed anastomoses, which can lead to complications such as leaks and adhesions.
Innovation Solution
The development of self-opening and self-closing magnetic compression anastomosis devices with elongated segments and polygon-opening/closing members that transition from a delivery configuration to a deployed configuration, allowing for minimally-invasive deployment via endoscope or trocar, and a storage and delivery system to facilitate easy loading and deployment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional bypass procedures are completed with endoscope, laparoscope, or robot, then the procedure can be performed with specialized equipment, but it is time consuming to join the holes cut into the tissues and requires specialized expertise not available at many surgical facilities
Solution Approach 1:
The invention extracts the complex tissue joining process from traditional surgical methods by introducing self-aligning magnetic compression devices that automatically locate and join tissue openings without requiring precise manual alignment or specialized surgical expertise, thereby reducing surgical time and complexity
Solution Approach 2:
The magnetic compression devices are designed to self-align and self-position within tissue openings through magnetic attraction forces, automatically finding their target location without requiring complex delivery mechanisms or specialized surgical skills, thus simplifying the procedure and reducing time
2Reliability
If magnets or couplings are delivered as two separate assemblies, then compressive anastomosis can be created, but the difficulty of placing the magnets or couplings limits the locations that compressive anastomosis can be used and requires open surgical field or bulky delivery device
Solution Approach 1:
The magnetic compression devices are designed to be nested within a delivery catheter in a collapsed state, allowing them to be delivered through minimally invasive access routes such as endoscopic or laparoscopic working channels, eliminating the need for open surgical fields or bulky delivery devices while maintaining reliable anastomosis formation capability
Solution Approach 2:
The devices transition from a collapsed, deliverable state within the catheter to an expanded, functional state at the target site through magnetic expansion mechanisms, enabling minimally invasive delivery while maintaining the structural integrity and compressive force needed for reliable anastomosis formation
3Ease of operation
If smaller magnetic structures are used to fit through delivery conduits, then minimally-invasive delivery is achieved, but the formed anastomosis is small and suffers from short-term patency
Solution Approach 1:
The magnetic compression devices are designed to expand from a compact delivery configuration to a larger functional configuration after deployment, allowing them to be delivered through small catheters while achieving sufficient size for long-term anastomosis patency, thus resolving the contradiction between minimally-invasive delivery and anastomosis durability
Solution Approach 2:
The devices are nested within the delivery catheter in a compressed state and then deployed to their full functional size at the target site, enabling passage through small working channels while maintaining the structural dimensions necessary for long-term patency and preventing short-term failure
4Force
If magnetic force is stronger than needed, then devices can couple at distances over 1 cm, but the devices may jump or spontaneously move together before the surgeon is ready and may inadvertently trap tissues that are not intended to be joined
Solution Approach 1:
The magnetic attraction force is designed to be dynamic and distance-dependent, providing sufficient force to couple devices at distances over 1 cm when needed, while the gradual increase in force with decreasing distance allows surgical control and prevents spontaneous jumping or uncontrolled movement before the surgeon is ready
Solution Approach 2:
The magnetic coupling system provides natural feedback through the gradual increase in attraction force as devices approach each other, allowing the surgeon to control the coupling process by managing the approach speed and distance, preventing uncontrolled movement while enabling coupling at extended distances when clinically indicated
5Ease of operation
If magnetic force is weaker, then devices can be controlled during placement, but the devices cannot couple strongly at distances over 1 cm when beneficial
Solution Approach 1:
The magnetic force characteristic is designed to be dynamic, providing strong coupling force when devices are at optimal distances for anastomosis formation, while maintaining controllability during the placement process through the natural distance-dependent behavior of magnetic attraction, thus achieving both device control and strong coupling capability
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 faster, less-invasive, and more cost-effective formation of anastomoses, reducing surgical time and pain, and improving the long-term patency of anastomoses, while minimizing complications like leaks and adhesions.
Implementation Method 1
the magnetic segments are configured to generate magnetic attraction forces to couple the deployable magnetic structures to one another
Implementation Method 2
Because of the strong compression, the tissue trapped between the couplings or magnets is cut off from its blood supply. Under these conditions, the tissue becomes necrotic and degenerates
Data Source
AI summary
The invention relates to deployable magnetic compression devices and systems and methods for the deployment of such magnetic compression devices. The magnetic compression devices are particularly useful for creating anastomoses, e.g., in the gastrointestinal tract. The devices are especially useful for minimally-invasive delivery, e.g., using endoscopic techniques. The systems, devices, and methods can be used to treat a variety of gastrointestinal and metabolic diseases, such as diabetes, obesity, and cancer.