Nerve Containment Chamber for Localized PEG Fusion Delivery
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing devices fail to create an isolated fluid containment field for topical delivery of pharmaceutical solutions to focal regions of a nerve, protect surrounding tissues, and allow for nerve repair without damage to the anastomosis, and lack a method for using PEG-fusion to restore function and sensation in nerve repair.
Innovation Solution
A nerve treatment device forms a fluid containment field around a nerve segment using an elongate body with flexible endwalls and apertures to retain the nerve, allowing controlled administration and removal of PEG-fusion solutions, minimizing exposure to surrounding tissues and facilitating nerve fusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high concentration PEG solution is used for nerve fusion, then nerve repair effectiveness is improved, but surrounding tissues are damaged
Solution Approach 1:
The device divides the treatment area into a contained internal chamber where high concentration PEG is applied only to the nerve, isolating it from surrounding tissues. The containment chamber segments the therapeutic zone from adjacent structures, enabling selective exposure.
Solution Approach 2:
The device creates a localized environment with high PEG concentration precisely where needed at the nerve anastomosis site, while surrounding tissues remain in a different chemical environment (low or zero PEG concentration). This spatial variation in chemical quality achieves effective local treatment without global exposure.
2Reliability
If PEG solution is administered to ensure consistent exposure to the nerve, then fusion effectiveness is improved, but device complexity increases
Solution Approach 1:
The containment chamber is nested within the delivery device body, creating a compact hierarchical structure. The chamber fits inside the device housing, allowing the complex function of fluid containment and delivery to be integrated within a manageable form factor.
Solution Approach 2:
The containment chamber serves multiple functions: it holds the PEG solution, defines the treatment zone, provides a barrier to surrounding tissues, and facilitates controlled delivery. This multi-functionality reduces the need for separate components, managing device complexity.
3Object-affected harmful factors
If the device is designed to protect surrounding tissues from PEG exposure, then tissue safety is improved, but ease of operation deteriorates
Solution Approach 1:
The containment chamber utilizes a flexible membrane or thin-walled structure that can be easily deformed during insertion and removal. This flexibility allows the device to conform to the nerve anatomy during placement and to be withdrawn without rigid constraints, maintaining ease of operation despite the protective containment function.
4Manufacturing precision
If the device creates a fluid containment field for topical delivery, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The containment chamber is nested within the delivery device body, creating a compact hierarchical structure. The chamber fits inside the device housing, allowing the complex function of fluid containment and delivery to be integrated within a manageable form factor.
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 enables effective PEG-fusion for rapid nerve repair by protecting surrounding tissues, ensuring consistent exposure to PEG, and allowing quantitative evaluation of electrophysiological activity, thereby restoring function and sensation.
Implementation Method 1
the containment chamber is configured to substantially retain a volume of fluid within the void volume around at least a portion of the isolated segment of the nerve
Implementation Method 2
The first and second apertures are configured to retain first and second ends of the isolated segment of the nerve, respectively, and to form fluid seals around the first and second ends of the isolated segment of the nerve
Implementation Method 3
PEG-fusion uses PEG, which is highly hydrophilic, as a dehydrating agent causing removal of bound water from the extracellular surfaces of cellular plasma membranes and promoting the plasma membranes of exposed cells to fuse together
Data Source
AI summary
A severed nerve may be surgically rejoined and severed axons fused via sequential administrations of solutions. The solutions may include a priming solution comprising methylene blue in a Ca2+-free saline solution, a fusion solution comprising about 50% (w/w) PEG, and a sealing solution comprising Ca2+-containing saline. The PEG fusion solution may be applied in a nerve treatment device configured to isolate the injured segment of the nerve. The device may include a containment chamber for creating a fluid containment field around the anastomosis. The device may have slits, slots, and/or apertures in opposing endwalls of the device designed to receive the nerve. The device may have an open bath configuration or may include separable lower and upper bodies to create a closed bath configuration. The device may include one or more fluid ports in fluid communication with the containment chamber for introducing and/or removing fluid.