Infusion Pump Bolus Prioritization for Multi-Device Command Conflicts
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Solution Overview
Problem
Ambulatory infusion pumps face conflicts when receiving commands from multiple devices simultaneously, leading to potential issues with delivering multiple boluses, which can result in low glucose levels.
Innovation Solution
A bolus permissions and prioritization scheme is implemented, assigning priority levels to interfaces on infusion pumps and remote control devices, automatically disabling lower priority interfaces when higher priority interfaces are accessed, and managing automatic correction boluses to prevent multiple deliveries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the infusion pump allows bolus programming from multiple devices (pump itself and remote control devices), then user convenience and accessibility are improved, but the risk of receiving conflicting commands and delivering multiple boluses increases
Solution Approach 1:
The system performs preliminary actions by establishing a permission state and priority level assignment before conflicting commands can occur. When a bolus command is received from any device, the system proactively checks the permission state and prevents subsequent bolus commands from lower priority devices, thereby avoiding command conflicts before they can cause harmful multiple bolus deliveries
Solution Approach 2:
The patent introduces an intermediary permission management system that mediates between multiple user interfaces and the bolus delivery function. This intermediary layer tracks which device has permission to program boluses and enforces priority rules, acting as a buffer that reconciles concurrent commands from multiple devices without allowing conflicting deliveries
2Reliability
If the system disables lower priority interfaces when higher priority interfaces are accessed, then command conflict is prevented, but system adaptability and flexibility are reduced
Solution Approach 1:
The permission state and interface availability are made dynamic rather than static. Devices can transition between having permission and not having permission based on real-time conditions, such as whether another device is currently active. This dynamic adjustment allows the system to maintain flexibility while preventing conflicts, as interfaces can become available again once the conflicting condition resolves
Solution Approach 2:
The system changes the parameter of interface availability based on the permission state. When a higher priority device is accessed, the permission parameter is updated to disable lower priority interfaces. This parameter change mechanism allows flexible control over interface accessibility while maintaining reliable conflict prevention through structured priority rules
Data Source
AI summary
In an infusion pump system that includes a pump that may have a user interface for pump programming, one or more smartphones or other remote control devices that interface with the infusion pump, and/or an automated insulin delivery algorithm, there is a potential conflict between commands such as boluses being programmed on multiple devices and/or calculated by the AID algorithm at the same time. In order to avoid low glucose levels that could result from delivering multiple boluses from these various sources when only one bolus is needed, systems and methods disclosed herein provide a bolus permissions and prioritization scheme that prioritizes boluses programmed with the infusion pump and one or more remote control devices and calculated by a closed loop delivery algorithm.