Tissue Securing Loop with Locking Mechanism for Endoscopic Wound Closure
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Solution Overview
Problem
Endoscopic procedures such as EMR and ESD often result in tissue defects or wounds that are difficult to close due to their size, which can lead to prolonged healing times and increased infection risk, especially since existing devices struggle to secure larger wounds through the working channel of an endoscope.
Innovation Solution
A medical device system featuring a loop portion with a locking mechanism and tether portion that can be deployed to secure tissue, utilizing protrusions to embed into the tissue and a gear system for adjustment, along with a clamp mechanism and severing clip for secure closure, allowing for effective tissue approximation and closure even in larger wounds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a device is sized to extend through a working channel of an endoscope, then the device can be delivered endoscopically, but it becomes difficult to close larger wounds that exceed the immediate working area of the endoscope
Solution Approach 1:
The device is divided into multiple segments including a delivery catheter, a loop portion, a tether portion, and a locking member that can be deployed sequentially through the endoscope working channel to close wounds of various sizes
Solution Approach 2:
The loop portion is configured to expand from a compressed delivery state through the catheter to a deployed state that can encompass wounds larger than the endoscope working area, utilizing three-dimensional expansion to overcome the size limitation
2Duration of action of stationary object
If the wound remains open for a longer time, then larger wounds have time to heal, but the risk of infection increases
Solution Approach 1:
The device enables immediate closure of the wound upon deployment, preventing the wound from remaining open and thereby eliminating the infection risk associated with prolonged exposure, while still allowing natural healing processes to proceed
3Area of stationary object
If a loop portion is used to secure tissue, then the device can accommodate larger wounds, but adjusting the device to achieve the desired amount of tissue within the device becomes difficult
Solution Approach 1:
The loop portion is designed with dynamic adjustability through the tether portion and locking member mechanism, allowing the operator to easily adjust the loop size and tissue capture amount during the procedure to achieve optimal wound closure
Solution Approach 2:
The manual adjustment mechanism is replaced with a locking member system that uses a tab and protrusion engagement mechanism, allowing for precise and easy adjustment of the loop portion to achieve the desired tissue capture without complex mechanical operations
Data Source
AI summary
The present disclosure pertains to medical devices. More particularly, the present disclosure pertains to devices, systems, and methods for securing tissue, such as a tissue defect or wound resulting from an endoscopic procedure, e.g., an endoscopic mucosal resection or submucosal dissection procedure. In one example, a device for securing tissue may include a loop portion configured to be disposed about a distal end of a delivery device in a delivery configuration and configured to be secured about the tissue in a deployed configuration. A locking member may be disposed on the loop portion. A tether portion having a proximal end extendable proximally within the delivery device and a distal portion extending from the loop portion slidably through the locking member.