Hyper-Dry Amniotic Membrane Scaffolds for Auricular Skin Grafts
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Solution Overview
Problem
Raw amniotic membrane is not readily available and difficult to store and handle, limiting its clinical use, and skin grafting on auricular defects, especially for auricular cancer, often results in infection and engraftment failure.
Innovation Solution
A hyper-dry amniotic membrane (HD-AM) is produced through a specific drying process, which is then rehydrated to retain epithelial cells and used as a scaffold between a skin graft and perichondrium or subcutaneous tissue defect to promote wound healing and engraftment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If raw amniotic membrane is used as a wound dressing, then wound healing promotion is improved, but storage and handling become complicated and availability decreases
Solution Approach 1:
The patent applies parameter changes by transforming the physical state of amniotic membrane from raw/wet to hyper-dry through controlled drying processes. This changes the moisture content parameter while preserving the biological activity and structural integrity of the membrane, enabling easy storage and handling without sacrificing wound healing properties
Solution Approach 2:
The hyper-dry amniotic membrane serves multiple functions: it acts as a protective barrier, promotes wound healing, provides structural support, and enables convenient storage and transport. This multi-functionality resolves the contradiction by making the material both clinically effective and logistically practical
2Quantity of substance
If skin grafting is performed on auricular skin defects, then coverage is achieved, but engraftment failure and infection are common
Solution Approach 1:
The hyper-dry amniotic membrane acts as an intermediary layer between the auricular defect and the skin graft. It provides a biologically active interface that promotes graft take, reduces infection risk, and enhances vascularization, thereby improving engraftment success while maintaining skin coverage
Solution Approach 2:
The amniotic membrane is applied to the auricular defect before skin grafting to prepare the wound bed. This preliminary action creates an optimal environment for subsequent graft engraftment by reducing infection risk and promoting vascularization, directly addressing the high failure rate of direct grafting
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
HD-AM enhances skin graft engraftment and wound healing by acting as a scaffold, reducing infection and improving healing outcomes on auricular defects.
Implementation Method 1
amniotic membrane produced by rehydrating the dry amniotic membrane by immersion in water or a buffer
Data Source
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AI summary
The present invention addresses the problem of providing a material as a scaffold used to prevent poor skin grafting when there is a defect in the perichondrium or periosteum or a defect in subcutaneous tissue. As a solution, there is provided a dry amniotic membrane manufactured according to a specific drying process. In more detail, a raw amniotic membrane placed in a processing tank (10) is continuously heated by a far-infrared heater (14) provided inside the processing tank (10), while performing a decompression operation where the interior of the processing tank (10) is placed in a decompressed state and irradiation of the raw amniotic membrane with microwaves from a microwave generating device (30) provided inside the processing tank (10) to apply energy to water molecules present inside the amniotic membrane and cause drying during a pressure recovery operation that slightly raises the pressure inside the depressurized processing tank (10) toward atmospheric pressure. By providing amniotic membrane, which has been dried by repeating the above process a plurality of times to retain its cellular and tissue structure, as a scaffold used to prevent poor skin grafting when there is a defect in the perichondrium or periosteum or a defect in the subcutaneous tissue, it is possible to enhance the healing effect of a skin graft.