Medical Pump Repeater Control for Fault Detection Reliability
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Solution Overview
Problem
Existing portable devices for controlled release of therapeutics suffer from malfunction rates, and there is a challenge in reducing their size, weight, and cost while maintaining effective drug delivery.
Innovation Solution
A repeater system is provided to control medical devices, including a repeater and a user interface. The repeater receives and transmits signals to wearable medical devices over a given range and also transmits signals to a user interface over a longer range. The system includes memory for logging data, a processor for analyzing fault conditions, and an alarm for notifying users of faults.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If portable devices for controlled release of therapeutics are designed to be smaller and lighter, then device portability and patient comfort are improved, but device complexity increases and reliability decreases
Solution Approach 1:
The device is divided into separate modules: a disposable cartridge containing the therapeutic reservoir and a reusable pump unit. This segmentation allows the complex pumping mechanism to be minimized in the reusable unit while keeping the simple reservoir in the disposable cartridge, reducing overall device complexity and improving reliability despite small size.
Solution Approach 2:
A communication interface and control system serve as intermediaries between the user, the pump controller, and the reservoir. This allows sophisticated control algorithms and fault detection to be implemented in software rather than requiring complex hardware, maintaining reliability while minimizing physical device size and weight.
2Volume of moving object
If the device size is reduced to improve portability, then ease of wear is improved, but manufacturing precision requirements increase
Solution Approach 1:
By separating the device into a disposable cartridge and reusable pump unit, each component can be manufactured to appropriate precision levels for its function. The cartridge requires simpler manufacturing with larger tolerances, while the pump unit is manufactured once to high precision and reused, reducing overall manufacturing precision requirements for the complete system.
Solution Approach 2:
The disposable cartridge is designed with simpler, less precise manufacturing to reduce cost and complexity, while the reusable pump unit is manufactured to high precision standards. This approach allows the system to achieve small overall size without requiring all components to be manufactured to high precision.
3Weight of stationary object
If the device is made more compact to reduce weight and size, then patient comfort is improved, but device complexity increases
Solution Approach 1:
The system is segmented into a simple disposable cartridge and a compact reusable pump unit with integrated electronics. This allows complex functions (pumping, sensing, communication) to be concentrated in the small reusable unit while the disposable unit remains simple, achieving compactness without proportionally increasing overall system complexity.
Solution Approach 2:
The reusable pump unit is designed as a universal platform that can work with different cartridge types and includes multiple functions (pumping, sensing, wireless communication, fault detection) integrated into a single compact device. This multi-functionality reduces the need for multiple separate devices, achieving compactness without excessive complexity.
Data Source
AI summary
Fill stations and base stations are provided for personal pump systems. The fill stations may be opened and closed to accept a reservoir and to allow fluid to be introduced into the reservoir for use with personal pump systems. The fill stations may hold the reservoir at a tilt relative to an underlying surface and may discourage overfilling of the reservoir. The filling stations may also include viewing windows having fluid lines marked thereon for indicating volume of fluid within the reservoir.