Split Ring Resonator Antenna for Wearable Infusion Pump
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Solution Overview
Problem
Existing wearable drug delivery devices for therapeutics face challenges such as malfunction, size, weight, and cost issues, and often require frequent re-location for application, particularly in parenteral routes like subcutaneous or intravenous administration, which can be cumbersome for patients.
Innovation Solution
The infusion pump assembly incorporates a split ring resonator antenna with an impedance matching circuit, coupled to a control unit and base unit for wireless data transmission and reception, minimizing parasitic effects from dielectric materials, and includes a disposable and reusable housing assembly for efficient fluid delivery and control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a wearable drug delivery device is designed to be compact and portable, then the device size and weight are reduced, but the reliability and functionality may be compromised
Solution Approach 1:
The device is divided into modular components including a reusable pump unit and disposable cartridges, allowing each component to be optimized independently for size and reliability while maintaining overall system functionality
Solution Approach 2:
The disposable cartridge is designed to nest within the reusable pump unit, with the cartridge containing the reservoir, pump drive, and other components in a compact nested arrangement that minimizes overall device volume while maintaining reliability
2Ease of operation
If electronic control components are added to enable automated drug delivery, then the ease of operation is improved, but the device complexity and cost increase
Solution Approach 1:
The device incorporates automated control systems with sensors and processors that monitor fluid levels, pump operation, and delivery timing, enabling the device to self-regulate and reduce the need for manual intervention while maintaining manageable complexity through intelligent automation
Solution Approach 2:
Traditional mechanical control mechanisms are replaced with electronic sensors, microprocessors, and wireless communication modules that provide more precise and reliable control with fewer moving parts, reducing mechanical complexity while improving ease of operation
3Ease of operation
If the antenna operates in close proximity to dielectric materials like the human body, then the usability and comfort are improved, but the radio frequency performance deteriorates due to parasitic effects
Solution Approach 1:
A matching network is introduced as an intermediary component between the antenna and the transmission line, acting as a buffer that compensates for the parasitic effects of dielectric materials and maintains optimal impedance matching for reliable RF performance during body contact
Solution Approach 2:
The antenna design incorporates adjustable electrical parameters such as resonant frequency and impedance that can be optimized through simulation and testing to minimize the impact of dielectric loading from the human body, maintaining reliable RF performance across different usage conditions
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 enables reliable, efficient, and minimally invasive wireless control of drug delivery systems, reducing malfunctions and improving user convenience by minimizing the impact of dielectric materials on radio frequency performance, thus enhancing the reliability and usability of wearable drug delivery devices.
Implementation Method 1
a split ring resonator antenna having a resonant frequency
Implementation Method 2
the antenna wirelessly transmits and receives data
Implementation Method 3
an impedance matching circuit... minimizing the parasitic effects of dielectric materials in close proximity to a wearable radio frequency device
Data Source
Figure 1~2
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AI summary
An infusion pump assembly is disclosed. The infusion pump assembly includes a reservoir for receiving an infusible fluid, a pump assembly for pumping a quantity of infusible fluid from the reservoir to an exit, a first valve assembly configured to selectively isolate the pump assembly from the reservoir, a second valve assembly configured to selectively isolate the exit from the pumping assembly, and a split ring resonator antenna having a resonant frequency comprising a plurality of planar metallic layers.