Spring-Loaded Mesh Hemostasis Device for GI Perforation Sealing
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Solution Overview
Problem
Conventional devices for hemostasis in endoscopic procedures are inefficient for sealing perforations or wounds in the gastrointestinal tract due to anatomical challenges and varying conditions, requiring more time and effort.
Innovation Solution
A spring-loaded mesh device with expandable elements and hooks that deploys from an endoscope to cover and seal tissue sites, using a shape-memory material to change configuration from expanded to retracted, radially compressing the tissue and securing it with hooks to achieve hemostasis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional hemostasis devices are used, then the procedure can be performed with simple devices, but the devices are inefficient for sealing perforations or wounds in the gastrointestinal tract
Solution Approach 1:
The mesh device transitions from a compressed delivery configuration to an expanded deployed configuration, dynamically adapting its size and shape to effectively seal perforations or wounds of varying dimensions in the gastrointestinal tract, thereby improving sealing efficiency without extending procedural time
Solution Approach 2:
The mesh is divided into multiple cell structures that can independently deform and conform to irregular tissue surfaces, allowing the device to efficiently seal complex wound geometries while maintaining a compact form factor for rapid deployment
2Reliability
If aggressive interventional endoscopic procedures are performed, then therapeutic outcomes can be achieved, but the risk of perforating the GI tract wall increases
Solution Approach 1:
The mesh device is pre-positioned over the target tissue site before aggressive therapeutic maneuvers are performed, creating a protective barrier that prevents perforation while allowing the procedure to proceed, thereby enabling effective hemostasis without increasing perforation risk
Solution Approach 2:
The mesh structure acts as a cushioning layer between the endoscopic instruments and the GI tract wall, absorbing mechanical stresses and preventing direct transmission of forces that could cause perforation, thus allowing aggressive procedures to be performed safely
3Area of stationary object
If the mesh is made large enough to cover target tissue sites, then coverage is adequate, but the device becomes difficult to deliver through the endoscope
Solution Approach 1:
The large-area mesh is nested within a delivery catheter in a compressed state, allowing it to be delivered through the endoscope despite its large expanded dimensions, thereby achieving both adequate coverage area and ease of delivery through standard endoscopic access
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
The device effectively seals perforations or tears with minimal procedural time and effort, ensuring efficient hemostasis while being adaptable to different anatomical conditions.
Implementation Method 1
a spring mechanism coupled to the mesh, the spring mechanism moving between an expanded configuration and a retracted configuration when the mesh is moved between the expanded and retracted configurations
Implementation Method 2
a plurality of hooks coupled to the mesh and oriented to extend into tissue to lock the mesh in position when the mesh is placed in a desired position over the target tissue site
Data Source
AI summary
A device for causing hemostasis includes a sheet of mesh stretchable between an expanded and a retracted configuration, a size of the sheet in the retracted configuration being selected to cover a target tissue site; a spring mechanism coupled to the mesh, the spring mechanism moving between an expanded configuration and a retracted configuration when the mesh is moved between the expanded and retracted configurations; and a plurality of hooks coupled to the mesh and oriented to extend into tissue to lock the mesh in position when the mesh is placed in a desired position over the target tissue site in the expanded configuration. The hooks are lockingly engaging the target tissue so that, after the hooks have lockingly engaged the tissue, the spring mechanism reverts to the retracted configuration drawing the engaged portions of tissue radially inward.