Magnetic Anastomosis Segments for Polygonal Deployment and Force Control
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Solution Overview
Problem
Existing magnetic compression devices for creating anastomoses are limited by invasive delivery methods, difficulty in controlling magnetic attraction, and are restricted to small structures, leading to complications such as leaks, adhesions, and inefficient anastomosis formation.
Innovation Solution
Magnetic anastomosis devices with variable magnetic force configurations, allowing for minimally-invasive delivery and deployment through endoscopy or laparoscopy, featuring magnetic segments that can transition from a linear to a polygonal shape, enabling controlled magnetic attraction and self-opening or self-closing mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If magnetic compression devices are made smaller to enable minimally-invasive delivery, then delivery feasibility is improved, but the formed anastomosis becomes small and suffers from short-term patency
Solution Approach 1:
The magnetic compression device is divided into multiple magnetic segments arranged in a polygonal configuration. Each segment can be independently positioned and magnetically coupled to adjacent segments, allowing the device to achieve a larger overall size while maintaining a compact delivery profile. The segmentation enables the device to expand from a small delivery configuration to a larger operational configuration that provides sufficient compression for reliable anastomosis formation.
2Reliability
If magnetic force between devices is made stronger to ensure robust coupling, then coupling reliability is improved, but the devices may jump or spontaneously move together before the surgeon is ready
Solution Approach 1:
The magnetic coupling force between devices is made variable rather than fixed. The magnetic segments can be selectively activated or deactivated, and their positioning can be adjusted during delivery to control the strength of magnetic attraction. This dynamic control allows the surgeon to weaken the magnetic force during delivery for ease of placement, then strengthen it once the devices are in the desired position to ensure robust coupling.
3Force
If magnetic devices are delivered as two separate assemblies requiring open surgical field, then device size and magnetic force are improved, but procedure complexity and invasiveness increase
Solution Approach 1:
Multiple magnetic segments are combined into a single integrated device assembly that can be delivered through a minimally-invasive pathway. The segments are connected in a polygonal arrangement where each segment can be magnetically coupled to its neighbors, creating a unified structure that maintains strong magnetic attraction force while being deliverable as one unit through endoscopic or laparoscopic instruments, eliminating the need for open surgical field assembly.
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
Facilitates faster, less invasive anastomosis formation with controlled magnetic force, reducing complications and enabling procedures like gastric bypass without open surgery, suitable for conditions like obesity and diabetes management.
Implementation Method 1
Magnetic anastomosis devices with variable magnetic force configurations, allowing for minimally-invasive delivery and deployment through endoscopy or laparoscopy, featuring magnetic segments that can transition from a linear to a polygonal shape, enabling controlled magnetic attraction
Data Source
AI summary
Magnetic anastomosis devices constructed from magnetic segments coupled together with members that help the devices spontaneously transform from a linear delivery configuration to a polygonal deployment configuration. When two devices are joined together over tissue(s), the compressive force causes the tissue(s) to necrose and form an anastomosis. By altering the arrangement of the magnetic poles of the magnetic segments in the devices, the magnetic interaction between paired devices can be altered. This property gives surgeons flexibility in choosing how much attractive force the devices will experience during a procedure.