PCA Infusion Control Using Physiological Authorization
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Solution Overview
Problem
Existing patient-controlled analgesia (PCA) systems lack effective safety features to prevent drug administration to patients who are unconscious, over-sedated, or in unstable conditions, and there is a need for improved drug-control algorithms to ensure safe drug delivery.
Innovation Solution
Implementing an infusion control device with drug-control algorithms that detect patient-controlled drug-requesting devices and sensor devices, identify patients, and authorize drug delivery based on patient physiological data and drug administration history, ensuring safe and controlled drug delivery through interoperable communication with various drug-delivery apparatuses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If safety features are added to PCA systems to prevent drug administration to unconscious or unstable patients, then patient safety is improved, but device complexity increases
Solution Approach 1:
The patent introduces an intermediary control system that acts as a mediator between the patient-controlled drug-requesting device and the drug-delivery apparatus. This intermediary implements drug-control algorithms that analyze sensor data and authorization requests, preventing direct unauthorized drug administration while maintaining system interoperability without requiring complex integration of all components
Solution Approach 2:
The patent segments the PCA system into distinct functional modules: patient-controlled drug-requesting device, intermediary control system with drug-control algorithms, sensor devices, and drug-delivery apparatus. This segmentation allows each component to perform its specific function independently, improving safety through specialized control logic while managing overall system complexity through modular design
2Reliability
If drug-control algorithms analyze sensor data and administration history to authorize requests, then drug delivery safety is improved, but computing requirements increase
Solution Approach 1:
The drug-control algorithm implements partial action by analyzing only the necessary subset of sensor data and administration history required to make authorization decisions. Rather than continuously processing all available data, the system performs targeted analysis of relevant parameters (such as current physiological state and recent drug administration timing), reducing computing requirements while maintaining adequate safety oversight
Solution Approach 2:
The system employs feedback mechanisms where the drug-control algorithm receives sensor data and administration history, makes authorization decisions, and adjusts future decision-making based on outcomes. This feedback loop allows the system to learn from past decisions and optimize its analysis requirements, reducing unnecessary computing while maintaining safety through iterative improvement of authorization logic
3Adaptability or versatility
If the system implements interoperability with various drug-delivery apparatuses, then system versatility is improved, but device complexity increases
Solution Approach 1:
The intermediary control system implements universality by designing a standardized interface and communication protocol that can work with multiple types of drug-delivery apparatuses. The drug-control algorithms are formulated in a device-agnostic manner, allowing the same control logic to authorize requests across different syringe pumps and infusion pumps without requiring device-specific customization, thereby achieving versatility while managing complexity
Data Source
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AI summary
An infusion control device detects a patient-controlled drug-requesting device that is in operable communication with the infusion control device. The infusion control device identifies sensor devices and drug-delivery apparatuses separate from the infusion control device that are in operable communication with the infusion control device. The infusion control device selects a drug-control algorithm for approving drug requests received by the patient-controlled drug-requesting device. The infusion control device identifies a patient using the patient-controlled drug-requesting device, and receives patient physiological data from the sensor devices. The infusion control device receives a request for a drug to be delivered to the patient by a drug-delivery apparatus. The infusion control devices determines whether the patient is authorized to perform the drug request. And based on determining that the patient is authorized, the infusion control device causes delivery of the drug to the patient.