Layered Tissue Graft Medicator for Phase-Specific Wound Healing
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Solution Overview
Problem
Current wound dressings and tissue grafts are static in nature, failing to provide critical medicants, external cellular matrix factors, cells, enzymes, and other secondary elements that are beneficial at different phases of the healing process, and they rely on a normal oxygen environment that may not exist in the host tissue, limiting wound healing.
Innovation Solution
A tissue graft medicator system that associates secondary materials like medicants, cellular matrix factors, cells, and oxygen with the tissue graft, delivering them via a delivery mechanism that does not directly inject into the wound bed but rather uses an intermediary tissue graft to augment the native healing elements, promoting wound healing through osmosis and atmospheric pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If current wound dressings and tissue grafts are used, then the structure is simple and easy to manufacture, but they are static in nature and cannot provide critical medicants and secondary elements at different phases of healing
Solution Approach 1:
The tissue graft is divided into multiple layers including a first layer with a first matrix and a second layer with a second matrix, where each layer can contain different secondary materials tailored to specific healing phases. This segmentation allows the graft to provide different medicants at different phases while maintaining a manageable structural complexity through modular design.
Solution Approach 2:
The patent transforms the static nature of traditional grafts into a dynamic system where secondary materials can be delivered at different time points during the healing process. The delivery mechanism enables temporal control over medicant release, allowing the graft to adapt its functionality throughout the healing phases without requiring complete structural redesign.
2Reliability
If direct injection of medicants into the wound bed is used, then the delivery is direct and efficient, but it affects subcutaneous and dermal layers and may not be absorbed properly in hypoxic environments
Solution Approach 1:
The tissue graft serves as an intermediary carrier between the medicant source and the wound bed. Instead of directly injecting medicants into the wound bed, they are first associated with the tissue graft, which then delivers them to the wound site. This intermediary approach protects the subcutaneous and dermal layers from direct exposure to injection procedures while ensuring reliable medicant delivery through the graft's structured matrix.
3Adaptability or versatility
If current tissue grafts rely on normal oxygen environment, then the healing process follows natural physiology, but it limits wound healing when the host tissue lacks normal oxygen environment
Solution Approach 1:
The patent changes the oxygen parameter by incorporating oxygen as a deliverable secondary material within the tissue graft. Rather than relying on the host tissue to provide a normal oxygen environment, the system actively delivers oxygen to the wound site through the graft's matrix, enabling healing in hypoxic conditions while maintaining controlled energy consumption through targeted oxygen delivery.
4Quantity of substance
If secondary materials are delivered through direct injection, then the concentration can be high, but the medicant molecular structure and viscosity are not conducive to transdermal absorption
Solution Approach 1:
The tissue graft utilizes a porous matrix structure that facilitates the incorporation and delivery of secondary materials with various molecular structures and viscosities. The porous architecture allows high concentrations of medicants to be held within the matrix while providing multiple pathways for controlled release and absorption, overcoming the limitations of direct injection for molecules with structures or viscosities unfavorable for transdermal absorption.
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
Enhances wound healing by providing critical elements at different phases, overcoming limitations of existing dressings and grafts, and ensuring effective delivery of secondary materials without relying on a normal oxygen environment.
Implementation Method 1
delivering them via a delivery mechanism that does not directly inject into the wound bed but rather uses an intermediary tissue graft to augment the native healing elements, promoting wound healing through osmosis
Implementation Method 2
promoting wound healing through osmosis and atmospheric pressure
Data Source
AI summary
Devices and systems are provided for associating secondary materials with tissue grafts, both ex-situ and in-situ. The secondary materials may be medicants, an external cellular matrix factor, a cell, an enzyme, or an element or compound, such as oxygen. In a method, different secondary materials are delivered to a tissue graft via a delivery device at different times, such as at different stages of a healing process.