Magnetically Attachable Hemoclips for Endoscopic Submucosal Dissection
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Solution Overview
Problem
Endoscopic submucosal dissection (ESD) faces challenges with effective countertraction, particularly due to the limitations of external magnet systems which are cumbersome and unable to provide adequate attraction across thicker abdominal walls, leading to weaker magnetic attraction and limited directional control.
Innovation Solution
The use of magnet-attached hemoclips (MAHs) with internal magnets that can be deployed on both sides of a lesion, allowing for independent countertraction and improved control during ESD procedures, enabling safer and quicker dissections by maintaining the lesion away from the muscle layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If an extracorporeal electromagnetic control apparatus is used for MAG-ESD, then countertraction can be provided, but the apparatus becomes large and cumbersome
Solution Approach 1:
The patent extracts the magnetic attraction function from the extracorporeal apparatus and relocates it within the body by implanting magnets in the gastric wall. This eliminates the need for large external equipment while maintaining the countertraction force needed for ESD procedures.
Solution Approach 2:
The patent introduces magnets as intermediary elements that are implanted in the gastric wall to mediate the magnetic attraction force. These internal magnets serve as intermediaries between the endoscope and the lesion, providing countertraction without requiring external apparatus.
2Force
If an external magnet is placed at the front of the stomach, then magnetic attraction can be achieved, but the lesion is always attracted forward and countertraction is limited
Solution Approach 1:
The patent segments the magnetic attraction system into multiple independent magnets distributed at different locations within the gastric wall. This segmentation allows each magnet to independently attract and provide countertraction in different directions, enabling versatile control over lesion movement during ESD.
Solution Approach 2:
The patent transitions from a single external magnet providing attraction in one dimension to multiple internal magnets providing attraction in multiple dimensions. This dimensional expansion allows for bidirectional and multi-directional countertraction, significantly improving adaptability during the procedure.
3Adaptability or versatility
If a thicker abdominal wall is present, then patient body type is accommodated, but magnetic attraction becomes weaker
Solution Approach 1:
The patent extracts the magnetic attraction function from the extracorporeal space and places magnets directly within the gastric wall. This eliminates the distance barrier created by thick abdominal walls, as the magnets operate in close proximity to the lesion regardless of the patient's body type.
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
MAHs facilitate faster submucosal dissection times, improved visualization of the dissection plane, and reduced muscular injuries, enhancing the safety and efficiency of ESD procedures by providing consistent and controlled countertraction.
Implementation Method 1
A magnet may be attached to a distal end of the suture. The magnet may have a cylindrical shape. The tether may extend through a circumferential outer surface of the magnet.
Data Source
AI summary
An endoscopic surgical instrument deploys a hemostatic clip during endoscopic submucosal resection. The hemostatic clip has an elongated collar configured to be detachably coupled to a shaft of the surgical instrument, a pair of jaws received in the collar, and a magnet coupled to the jaws.