Neostomy Apparatus With Axial Control for Septal Tissue Cutting
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Solution Overview
Problem
Current methods for treating diastolic heart failure, which involves creating a left-to-right shunt through the interatrial septum, lack a simple and effective neostomy apparatus for opening a small hole, particularly in terms of ergonomics and control mechanism design.
Innovation Solution
A neostomy apparatus with a grasping device, cutting device, and control handle, featuring a housing with manipulation portions that axially move elongated members, limiting structures, and a sealing assembly for negative pressure, along with conductive structures for precise tissue manipulation and cutting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a neostomy apparatus is designed with complex control mechanisms to achieve precise tissue manipulation, then the reliability and precision of the procedure improve, but the ease of operation and ergonomic design deteriorate
Solution Approach 1:
The control handle is divided into multiple independent manipulation portions (first, second, and third manipulation portions), each controlling a specific function (grasping, cutting, and neostomy respectively). This segmentation allows each portion to be optimized for its specific function while maintaining overall system reliability, and simplifies operation by providing dedicated controls for each surgical step.
Solution Approach 2:
The manipulation portions are designed to move axially relative to the housing, providing dynamic control capabilities. The elongated members connected to these manipulation portions can be precisely positioned and controlled during the procedure, enabling reliable tissue manipulation while maintaining ergonomic operation through smooth, controlled movement rather than complex mechanical linkages.
2Manufacturing precision
If the neostomy apparatus includes multiple functional components for precise control, then the surgical precision improves, but the device complexity increases
Solution Approach 1:
The control handle integrates multiple functions into a single device: the first manipulation portion controls the grasping device for tissue capture, the second manipulation portion controls the cutting device for tissue division, and the third manipulation portion controls the neostomy formation. This multi-functionality achieves surgical precision across multiple procedural steps while avoiding the need for multiple separate devices, thereby managing overall complexity.
Solution Approach 2:
The elongated members are partially located within the housing, with limiting structures (grooves or through holes) that guide and constrain their movement. This nested arrangement allows the complex multi-component system to be compactly organized within the handle, reducing spatial complexity while maintaining the precision control capabilities of each individual component.
3Ease of operation
If the manipulation portions have extended travel distance for better control, then the ease of operation improves, but the device length increases
Solution Approach 1:
The manipulation portions move axially within the housing rather than requiring extended lateral travel. The first, second, and third manipulation portions are arranged to provide sufficient control travel distance within the compact axial dimension of the handle, allowing ease of operation without increasing the overall device length in radial or lateral directions.
Solution Approach 2:
The axial movement of manipulation portions within the housing provides sufficient control range for precise manipulation. The limiting structures (grooves or through holes) ensure that the elongated members travel the appropriate distance for effective tissue control while maintaining a compact device profile, optimizing the balance between operational ease and device dimensions.
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 the creation of a left-to-right shunt by allowing for controlled grasping and cutting of interatrial septum tissue with enhanced ergonomics and reliability, ensuring effective tissue manipulation and improved surgical precision.
Implementation Method 1
a sealing assembly; the sealing assembly is located at the distal end of the housing and is sealingly connected to the proximal end of the catheter body
Implementation Method 2
the catheter body may be communicated with a negative pressure source through the sealing assembly, such that a negative pressure is formed in the catheter body under the action of the negative pressure source
Data Source
AI summary
A neostomy apparatus, including a grasping device, a cutting device and a control handle. The control handle includes a housing and a manipulation portion disposed in the housing, the manipulation portion can move axially relative to the housing; the grasping device or the cutting device includes an elongated member, and the manipulation portion drives the elongated member to move axially; the elongated member is partially located in the housing, and a first limiting structure is further disposed in the housing, the first limiting structure has a groove or a through hole, and a portion of the elongated member located in the housing is at least partially disposed in the groove or the through hole of the first limiting structure.