Ambulatory Infusion Pump Touchscreen Locking for Inadvertent Activation
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Solution Overview
Problem
Portable medical devices, such as ambulatory infusion pumps, face issues with inadvertent activation due to physical contact during operations like cartridge replacement or tube changes, which can be dangerous and disruptive, highlighting the need for a mechanism to prevent unintended device operation during critical tasks.
Innovation Solution
The device automatically locks its touchscreen when an uninterrupted operation is indicated, preventing navigation or parameter setting until the operation is completed, and can be unlocked by selecting an icon after the task is finished, ensuring safe and uninterrupted device operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the touchscreen remains unlocked to allow user interaction, then ease of operation is improved, but reliability deteriorates due to inadvertent activation during critical tasks
Solution Approach 1:
The touchscreen transitions between locked and unlocked states dynamically based on the operational context. During critical tasks such as cartridge replacement or tube changes, the touchscreen automatically locks to prevent inadvertent activation. After the critical task completes, the touchscreen automatically unlocks to restore full user interaction capability. This dynamic state change resolves the contradiction by adapting the touchscreen accessibility to the current operational requirements.
2Reliability
If the touchscreen is locked to prevent inadvertent activation, then reliability is improved, but ease of operation worsens due to restricted access during uninterrupted operations
Solution Approach 1:
The system performs preliminary detection to identify when a critical task is in progress before locking the touchscreen. By detecting the operational state in advance (such as detecting cartridge replacement or tube change activities), the system proactively locks the touchscreen to prevent potential inadvertent activation. This preliminary action ensures reliability is maintained while minimizing the impact on ease of operation, as the lock is applied only when truly necessary.
3Device complexity
If simple display lock protection is used, then device complexity is reduced, but reliability is insufficient to protect against programmed device operation during user activities
Solution Approach 1:
The system implements a feedback mechanism that continuously monitors the operational state of the infusion pump and the user's interaction with the device. When the system detects that a critical task is in progress (such as cartridge replacement or tube changes), it automatically locks the touchscreen. After the critical task completes, the system detects this and automatically unlocks the touchscreen. This feedback-driven approach enhances reliability without significantly increasing device complexity, as it utilizes existing sensors and state-detection capabilities.
Data Source
AI summary
Inadvertent activation of a portable medical device such as an ambulatory infusion pump can be reduced by locking a touchscreen of the device when it is indicated that an uninterrupted operation is to be performed. When a processor receives a device operation input from the touchscreen that indicates an uninterrupted operation is to be performed on the portable device, the touchscreen is automatically locked such that touch input at the touchscreen is not processed by the processor to navigate between or among menu screens or set pump parameters. Following completion of the uninterrupted operation, the touchscreen can be unlocked. In one embodiment, the touchscreen can be unlocked by selection of an unlock icon on the touchscreen.