Nested Tube Tissue Prosthesis Insertion System with Magnetic Sealing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current tissue prosthesis insertion systems face challenges in maintaining stability and minimizing disturbance during the minimally invasive delivery of tissue prostheses, particularly in procedures like intervertebral disc nucleus replacement, where precise alignment and sealing are crucial.
Innovation Solution
A tissue prosthesis insertion system featuring nested tubes with a magnetic mount and attachment device for sealing, a stiffening member to collapse the prosthesis component, and a withdrawing device to create a low-pressure environment, along with a protective sheath for sliding displacement and lubrication, facilitates precise placement and filling of the prosthesis with an elastically deformable material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the cannula and delivery mechanism are made as thin as possible to minimize incision size, then the incision size is reduced, but the structural stability and sealing capability of the assembly deteriorates
Solution Approach 1:
The system employs multiple nested tubes (outer tube, intermediate tube, inner tube) where each tube fits within the previous one. This nesting arrangement allows the delivery system to maintain a compact, thin profile for minimal incision while providing multiple sealing surfaces and structural layers that enhance overall sealing capability and reliability.
2Length of moving object
If the cannula and delivery mechanism are made as thin as possible to minimize incision size, then the incision size is reduced, but the structural stability of the assembly deteriorates
Solution Approach 1:
The nested tube structure provides progressive structural support. The outer tube provides initial stability, the intermediate tube adds reinforcement, and the inner tube maintains the final configuration. This layered nesting allows the overall assembly to remain thin for minimal incision while each layer contributes to cumulative structural stability.
Solution Approach 2:
The delivery system is divided into multiple segmented components (outer tube, intermediate tube, inner tube, magnetic mount, attachment device) that can be independently positioned and secured. This segmentation allows each component to contribute to overall stability while maintaining a compact, minimally invasive profile.
3Reliability
If magnetic mounts and attachment devices are added to facilitate sealing and assembly stability, then the sealing capability and stability are improved, but the device complexity increases
Solution Approach 1:
The system replaces traditional mechanical fastening mechanisms with magnetic mounts that provide secure attachment through magnetic attraction. This substitution simplifies the assembly process, reduces the number of mechanical components required, and maintains reliable sealing without significantly increasing overall device complexity.
Solution Approach 2:
The magnetic mounts and attachment devices serve multiple functions: they provide structural connection between components, ensure proper alignment, and maintain sealing integrity. This multi-functionality reduces the need for separate dedicated components for each function, thereby limiting the increase in device complexity.
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 system ensures stable and precise delivery of the tissue prosthesis, maintains the integrity of the assembly, and forms an elastically deformable prosthesis that can be easily inserted and positioned within the body, addressing the need for minimal disturbance and accurate alignment.
Implementation Method 1
a magnetic mount carried at a proximal end of the first assembly; and an attachment device carried at a distal end of the second assembly, the attachment device being responsive to the magnetic mount of the first assembly
Implementation Method 2
the magnetic mount and the attachment device carrying complementary engaging formations to facilitate sealing between the magnetic mount and the attachment device
Implementation Method 3
operating the withdrawing device causes an increase in the volume of the closed system with a corresponding reduction in the pressure in the interior of the component, resulting in the component collapsing about the stiffening member
Data Source
AI summary
A tissue prosthesis insertion system (80) includes a first assembly (10) comprising a plurality of nested tubes (12), one of the tubes being a carrier tube (14) which, in use, receives a component (16) of a tissue prosthesis at a distal end of the carrier tube (14). A magnetic mount (44) is carried at a proximal end of the first assembly (10). A second assembly (82) is removably attachable to the first assembly (10). An attachment device (92) is carried at a distal end of the second assembly (92), the attachment device (92) being responsive to the magnetic mount (44) of the first assembly (10), the magnetic mount (44) and the attachment device (92) carrying complementary engaging formations to facilitate hermetic sealing between the magnetic mount (44) and the attachment device (92).