Skin-Adhered IV Access Device with Integrated Port and Cannula
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Solution Overview
Problem
Current intravenous infusion devices are too large and complex for ambulatory use, restricting their application to specialized facilities and requiring frequent blood sampling, which is inconvenient and costly.
Innovation Solution
A compact intravenous access device with a port, coupling element, and injection or blood sampling unit that adheres to the skin, eliminating the need for long connecting tubes and allowing direct skin attachment, featuring a septum at the port's exterior end and a connecting cannula for secure and automatic assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional intravenous infusion devices are used, then intravenous access and fluid delivery are achieved, but the devices are too large and complex for ambulatory use
Solution Approach 1:
The device is divided into separate functional modules: a catheter assembly with port, a pump unit, and a reservoir. These modular components can be independently manufactured and assembled, reducing overall device complexity while maintaining functionality for ambulatory use
Solution Approach 2:
The catheter is inserted through the septum into the port cavity, with the needle collapsing around the catheter during insertion. The pump unit connects to the port, creating a nested configuration where smaller components fit within or alongside larger ones, minimizing overall device footprint
2Productivity
If traditional intravenous infusion devices are used, then intravenous access is established, but frequent hospital visits are required for blood sampling
Solution Approach 1:
The device enables patients to perform blood sampling themselves through the integrated port and catheter system. The self-sealing septum allows repeated access without requiring professional intervention, empowering patients to monitor their own analyte levels at home
Solution Approach 2:
The port serves multiple functions: it provides intravenous fluid delivery, enables blood sampling, and allows analyte monitoring. This multi-functional design consolidates what would traditionally require separate procedures and facility visits into a single integrated system
3Adaptability or versatility
If a port with septum is used, then repeated access is enabled, but the assembly of components becomes complex
Solution Approach 1:
The catheter is pre-loaded into the port cavity with the needle positioned to pierce the septum. The collapse feature is pre-configured so that upon insertion, the needle automatically collapses around the catheter, eliminating the need for complex manual assembly steps during patient application
Solution Approach 2:
The needle and catheter assembly appears to be designed as a disposable component that is inserted through the reusable port. This allows the complex piercing and sealing action to be performed by a single-use element, simplifying the overall system architecture
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
Enables safe and convenient ambulatory use of intravenous infusion and blood sampling, reducing the need for frequent hospital visits and allowing continuous monitoring of analyte concentrations, while maintaining safety and simplicity in design.
Implementation Method 1
a coupling element having means for positioning and fixing the port and the injection or blood sampling unit relative to each other and having an adhesive contact surface for securing onto the patient
Implementation Method 2
a connecting cannula which secures free passage of injection fluid or blood between the injection or blood sampling unit and the intravenous catheter
Data Source
AI summary
An improved, injection or blood removal device for intravenous access has a port with a septum at the exterior end of an intravenous catheter, a coupling element having an adhesive surface for securing attachment onto the skin, an injection or blood sampling unit, a connecting cannula piercing the septum of the port, and means to secure functional assembly. Attachment of the device to the skin covering or close to the intravenous puncture site and without long communicating tubes allows ambulant injection of drugs or measuring of concentration-time profiles of exogenous and endogenous analytes to improve treatment modalities on an individualized basis.