ECM Sheet Encasement for Implantable Device Biocompatibility
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Solution Overview
Problem
Implanted medical devices often face issues such as inflammation, infection, and thrombogenesis, leading to premature failure and the need for additional surgical procedures, causing patient discomfort and trauma.
Innovation Solution
The use of extracellular matrix (ECM) sheet structures to encase medical devices, which can include biologically active agents and pharmacological agents to promote modulated healing and tissue regeneration, reducing harsh biological responses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional medical devices (metals, polymers, exotic materials) are used for implantation, then device strength and structural integrity are improved, but harsh biological responses (inflammation, infection, thrombogenesis) occur
Solution Approach 1:
The patent applies the intermediary principle by introducing an extracellular matrix (ECM) coating as a mediator between the conventional medical device and the host tissue. The ECM coating serves as a biocompatible interface that reduces harsh biological responses while allowing the underlying device structure to maintain its strength and structural integrity. The coating acts as a buffer that promotes tissue integration without compromising device performance.
Solution Approach 2:
The patent applies composite materials by combining conventional device materials (metals, polymers) with extracellular matrix components to create a hybrid structure. The device consists of a core structural component made from conventional materials that provides mechanical strength, surrounded by an ECM coating that provides biocompatibility. This composite approach allows both requirements to be satisfied simultaneously.
2Object-affected harmful factors
If natural tissue materials are used for heart valves and grafts, then biocompatibility is improved, but gradual calcification occurs leading to stiffening and tearing
Solution Approach 1:
The patent merges the advantages of natural tissue materials (biocompatibility) with synthetic materials (durability, resistance to calcification) by applying an ECM coating on top of conventional device materials. This combination allows the device to exhibit both excellent biocompatibility and long-term durability without suffering from the calcification problems of pure natural tissue valves.
3Object-affected harmful factors
If ECM encasement structures are used to reduce biological responses, then biocompatibility is improved, but device complexity increases
Solution Approach 1:
The patent uses thin film ECM coatings rather than bulky encasement structures to achieve biocompatibility. The coating is applied as a thin layer on the device surface, providing the necessary biocompatible interface without significantly increasing device complexity or size. This approach maintains device simplicity while achieving the desired biological response modulation.
Data Source
AI summary
An implantable medical product and method of use for substantially reducing or eliminating harsh biological responses associated with conventionally implanted medical devices, including inflammation, infection and thrombogenesis, when implanted in in a body of a warm blooded mammal. The bioremodelable pouch structure is configured and sized to receive, encase and retain an electrical medical device therein and to allow such device to be inserted into the internal region or cavity of the pouch structure; with the pouch structure formed from either: (a) first and second sheets, or (b) a single sheet having first and second sheet portions. After receiving the electrical device, the edges around the opening are closed by suturing or stapling. The medical device encased by the bioremodelable pouch structure effectively improves biological functions by promoting tissue regeneration, modulated healing of adjacent tissue or growth of new tissue when implanted in the body of the mammal.