Nested Tissue Clipping Device for Large Defect Closure
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Solution Overview
Problem
Current closure devices, such as hemostasis clips and over-the-scope clips, face challenges in effectively closing large perforations and preventing leakage of bodily fluids due to limited size, cumbersome deployment, and the need for high skill, often requiring multiple clips and causing complications.
Innovation Solution
A tissue clipping device with a lock tube and clip arms that can be deployed endoscopically, allowing for precise closure of large defects and perforations without retrieving the endoscope, enabling close deployment of multiple clips and repositioning, reducing the need for suction, and maintaining visibility during deployment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If over-the-scope clips are used to close large perforations, then the closure capability is improved, but the device complexity and difficulty of operation increase due to the need to retrieve the endoscope for attachment
Solution Approach 1:
The clipping device is nested within the distal end of the endoscope, with the lock tube and clip mechanism contained inside the endoscope's outer diameter. This allows the closure device to be delivered through the endoscope without requiring retrieval of the endoscope from the patient's body, thereby reducing procedural complexity while maintaining the ability to close large perforations
2Reliability
If over-the-scope clips are deployed with suction to pull target tissue into the clip, then the clipping effectiveness is improved, but the visibility of the target area deteriorates because suctioned tissue covers the endoscope lens
Solution Approach 1:
Instead of pulling the target tissue into the clip using suction (which blocks the lens), the invention inverts the approach by pushing the clip arms outward to grasp the tissue that is already visible in the field of view. The clip arms are biased in an open configuration and can be actuated to close on tissue without requiring suction, thereby maintaining visibility throughout the procedure
3Reliability
If multiple hemostasis clips are delivered through an endoscope to close large defects, then the closure capability is improved, but the productivity decreases due to the time-consuming sequential delivery of multiple clips
Solution Approach 1:
The invention combines multiple clip arms (typically three or more) into a single integrated clipping device that can be deployed simultaneously as one unit. This merging of multiple clipping functions into a single device allows large defects to be closed in one deployment rather than requiring sequential delivery of multiple separate clips, thereby improving productivity while maintaining reliable closure capability
4Reliability
If over-the-scope clips are used to close large perforations, then the closure capability is improved, but the ease of operation deteriorates due to the high skill level required for deployment
Solution Approach 1:
The clip arms are equipped with a spring bias that automatically opens them to an open configuration when deployed, eliminating the need for complex manual manipulation or suction assistance. The device essentially serves itself by using its own structural properties (spring-loaded arms) to perform the clipping function, making deployment simpler and more intuitive while maintaining the ability to close large perforations reliably
Data Source
AI summary
A tissue clipping device and system, and method for clipping tissue are disclosed. The tissue clipping device includes a clip with clip arms that is slidably disposed within a channel of a lock tube. The clip is designed to move between an open configuration in which distal ends of the clip arms are separated from each other for receiving tissue therebetween, and a closed configuration in which the distal ends of the clip arms are closer to each other than in the open configuration for clipping the tissue received therebetween. The tissue clipping system further includes a delivery device for delivering and deploying the tissue clipping device. The delivery device is releasably coupled to the tissue clipping device.