Drug Delivery Control Unit Preventing Over-Delivery
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Solution Overview
Problem
Current drug delivery systems in hemodialysis often lead to over-delivery of medications, which can be harmful to patients due to inaccuracies in fluid volume measurement and potential air presence in delivery lines, lacking effective error correction mechanisms.
Innovation Solution
A method and system that utilize a control unit with processors and sensors to monitor and adjust the drug delivery device, ensuring the correct amount of fluid is delivered by detecting air presence and sending signals to pumps to prevent over-delivery, and alerting users if the initial fluid amount does not match the desired amount.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If drug delivery systems use fluid volume measurement to control medication delivery, then delivery precision can be improved, but measurement inaccuracies and air presence in delivery lines can cause over-delivery
Solution Approach 1:
The system performs preliminary actions by detecting the presence of air in the delivery line before drug delivery begins, and by verifying the initial fluid amount in the syringe matches the prescribed dosage. This prevents over-delivery before it can occur by establishing correct conditions in advance.
Solution Approach 2:
The system continuously monitors fluid delivery and provides feedback by comparing the delivered amount against the prescribed dosage. When air is detected or when the delivered amount approaches the threshold, the system sends feedback signals to adjust or stop the pump, preventing over-delivery.
2Object-affected harmful factors
If the system continuously monitors delivered fluid amount and detects air presence, then drug delivery safety can be improved, but device complexity increases
Solution Approach 1:
The system extracts and addresses specific harmful factors (air bubbles and over-delivery) separately through dedicated detection mechanisms. Rather than monitoring all possible parameters, it focuses on extracting and correcting the specific issues of air presence and volume accuracy that cause over-delivery.
Solution Approach 2:
The control unit acts as an intermediary between the pump mechanism and the safety monitoring functions. It receives inputs from air detectors and volume sensors, processes this information, and mediates by sending appropriate control signals to the pump to prevent over-delivery without requiring direct complex integration between all components.
3Productivity
If the system sends signals to pump to increase pumping speed upon air detection, then air removal efficiency can be improved, but delivery time varies
Solution Approach 1:
The system dynamically adjusts pump speed based on real-time conditions. When air is detected, the pump speed increases to efficiently remove air bubbles. Once air is cleared, the system transitions to the prescribed delivery rate. This dynamic adjustment optimizes air removal while ultimately achieving accurate dosage delivery.
Solution Approach 2:
The system implements periodic monitoring of air presence during the delivery process. Rather than maintaining constant high-speed pumping, it periodically checks for air bubbles and only increases speed when necessary, allowing efficient air removal while maintaining overall delivery time consistency through structured periodic checks.
Data Source
AI summary
This disclosure relates to preventing over-delivery of a drug and related systems and methods. In certain aspects, a method is performed by a data processing apparatus. The method includes receiving, from a drug delivery device, information pertaining to a desired amount of fluid to be delivered by the drug delivery device and receiving information pertaining to a delivered amount of a fluid that has been delivered by the drug delivery device. The method also includes determining that the delivered amount satisfies a predetermined threshold amount and in response to the determination, detecting whether an initial amount of fluid provided to the drug delivery device corresponds to the desired amount of fluid to be delivered.