Flexible Perfusion Chamber for Engineered Tissue Vascularization
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Solution Overview
Problem
Current engineered tissue implants face challenges in achieving effective vascularization, leading to hypoxia and cell death due to the lack of integrated vascular paths and the rigidity of existing scaffolds, which limits their ability to integrate with host tissues and adapt to different wound shapes.
Innovation Solution
The development of a transplantable engineered tissue implant with a flexible perfusion chamber and a porous scaffold that can be vascularized in vitro, allowing direct connection to host blood vessels and integration with surrounding tissues, featuring a capillary network formed by co-cultured endothelial cells and mesenchymal stem cells under continuous perfusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a rigid scaffold is used to provide structural support, then the scaffold maintains its shape, but it cannot adapt to different wound shapes and limits tissue integration
Solution Approach 1:
The patent employs a flexible membrane chamber that can be conformally fitted to various wound geometries while maintaining an enclosed perfusion environment. This flexible enclosure replaces rigid scaffolds, allowing the implant to adapt to different body contours and wound shapes without compromising structural integrity or cellular viability.
Solution Approach 2:
The scaffold structure is designed to be dynamic rather than static, allowing it to flex and conform to the host tissue contours. The flexible membrane chamber can dynamically adjust its shape to match the wound site, enabling better integration with surrounding tissues while maintaining the necessary structural support for cell growth and vascularization.
2Reliability
If no integrated vascular paths are provided, then the implant structure remains simple, but hypoxia and cell death occur due to lack of blood supply
Solution Approach 1:
The patent incorporates pre-formed vascular channels and a perfusion chamber with inlet and outlet ports before implantation. This preliminary vascular infrastructure ensures immediate blood supply to the implanted tissue, preventing hypoxia and cell death while avoiding the complexity of post-implantation vascular integration. The pre-established vascular paths allow rapid connection to host circulation.
Solution Approach 2:
The flexible membrane chamber serves as an intermediary structure that bridges the gap between the implant and host vasculature. It provides a controlled microenvironment with integrated vascular channels that facilitate blood flow while mediating the interaction between the implant and surrounding tissues, ensuring reliable oxygen and nutrient delivery without requiring complex direct vascular anastomosis.
3Productivity
If the implant cannot connect to host blood vessels, then the implant structure remains simple, but oxygen and nutrition supply is insufficient for wound healing
Solution Approach 1:
The perfusion chamber is pre-configured with vascular inlet and outlet connections that enable immediate blood flow establishment upon implantation. This preliminary perfusion system ensures rapid oxygen and nutrient delivery to accelerate wound healing while maintaining a relatively simple structure that integrates directly with host vasculature without requiring complex surgical intervention.
Solution Approach 2:
The flexible membrane chamber serves multiple functions simultaneously: it provides structural containment, enables conformal fitting to wound sites, establishes vascular connections for perfusion, and creates a controlled microenvironment for cell growth. This multi-functionality accelerates wound healing while avoiding the need for separate components for each function, thus limiting overall 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
This solution accelerates wound healing by providing immediate oxygen and nutrition, reducing tissue regeneration time, and promoting all phases of wound healing through enhanced blood supply and stem cell delivery, while allowing the implant to conform to anatomical shapes and integrate seamlessly with host tissue.
Implementation Method 1
a porous scaffold within the fluid flow passage of the tubular member, the porous scaffold arranged such that, in a presence of a perfusion fluid, the perfusion fluid will flow through the porous scaffold
Implementation Method 2
a capillary network formed by co-cultured endothelial cells and mesenchymal stem cells under continuous perfusion
Data Source
AI summary
A engineered tissue implant comprising a perfusion chamber formed with a biocompatible flexible tubular member having a wall defining an internal fluid flow passage and a porous scaffold within the fluid flow passage of the tubular member, the porous scaffold arranged such that, in a presence of a perfusion fluid, the perfusion fluid will flow through the porous scaffold and be inhibited from flow between the porous scaffold and the wall of the tubular member. The engineered tissue implant may be understood as a transplantable cell construct or as an implantable bioreactor for cell growth both in vitro and/or in vivo. A method to provide tissue for reconstruction may comprise forming the engineered tissue implant containing a scaffold, introducing and seeding cells to the scaffold, introducing a perfusion fluid to the scaffold which flows through the fluid flow passage and scaffold, proliferating the cells within the scaffold and forming blood vessels within the scaffold. This may be followed by transplanting the engineered tissue implant in vivo where nutrition and oxygen are provided to support the preloaded cells.