Percutaneous Access Device Seal for CNS Therapy
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Solution Overview
Problem
Current percutaneous devices face challenges in maintaining infection prevention and facilitating repeated access for therapeutic agent delivery to the central nervous system, particularly due to the risk of bacterial ingress and the need for repeated surgeries to administer treatments.
Innovation Solution
A percutaneous access device with a body having extracorporeal and subcutaneous surfaces, featuring ports that connect to implanted intracranial catheters, is designed with a seal to prevent microbial ingress and includes a flange to stabilize the device, encouraging fibrosis for integration and reducing movement, along with a delivery unit for controlled fluid administration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a percutaneous access device is provided to allow repeated delivery of therapeutic agents, then the need for repeated surgery is eliminated, but the risk of bacterial ingress and infection increases
Solution Approach 1:
The patent introduces a percutaneous access device that acts as an intermediary between the external environment and the intracranial catheter. The device includes a port system with seals and barriers that mediate the connection, allowing therapeutic agent delivery while preventing bacterial ingress. The access device serves as a protective interface that enables repeated access without direct skin penetration for each treatment session.
Solution Approach 2:
The patent employs disposable components such as seals and barriers that are replaced periodically to maintain infection prevention. These short-living components are designed to be replaced during routine access procedures, ensuring continuous protection against bacterial ingress while allowing repeated therapeutic access. The disposable nature of these components eliminates the need for complex sterilization protocols.
2Reliability
If a seal is provided between the port lumen and extracorporeal surface to prevent infection, then bacterial ingress is reduced, but access for therapeutic delivery becomes more complex
Solution Approach 1:
The percutaneous access device is segmented into distinct functional components: a port system, seal elements, barrier components, and connection interfaces. This segmentation allows each component to be optimized independently for its specific function while maintaining overall simplicity. The modular design enables straightforward assembly and maintenance, reducing the practical complexity despite the multiple functional requirements.
3Adaptability or versatility
If multiple ports are provided for simultaneous or sequential administration through different catheters, then tailored treatment strategies are enabled, but device complexity increases
Solution Approach 1:
The percutaneous access device incorporates multiple ports that can serve different functions simultaneously or sequentially. Each port is designed with universal connection characteristics that allow compatibility with various catheter types and delivery systems. This multi-functionality enables tailored treatment strategies through different administration routes while maintaining a standardized device architecture that limits overall complexity.
Data Source
AI summary
Apparatus for delivering therapeutic agents to the central nervous system of a subject is described. The apparatus includes at least one intracranial catheter and a percutaneous access device. The percutaneous access device includes a body having at least one extracorporeal surface and at least one subcutaneous surface, the body defining at least one port for connection to an implanted intracranial catheter. The port is accessible from the extracorporeal surface of the device, but is provided with a seal such as a rubber bung between the lumen of the port and the extracorporeal surface. The percutaneous access device may have more than two ports and/or a flange. A method of implanting the percutaneous access device is also described.