Physiological Monitor Parameter Upgrades Without Board Variants
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Solution Overview
Problem
Physiological monitoring systems face challenges in efficiently configuring and upgrading processor boards to measure various physiological parameters without requiring multiple part numbers and in-field firmware updates, limiting flexibility and adaptability to changing user requirements.
Innovation Solution
A parameter upgrade system that uses a small update tool to custom-configure processor boards within physiological monitors, allowing for individual parameter additions and firmware updates, which can be performed at production, integration, or end-user facilities, interfacing with various computer platforms for flexible programming and data management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple part numbers are assigned for each possible combination of physiological parameters, then each specific configuration can be precisely identified and managed, but the device complexity and inventory management become significantly more complex
Solution Approach 1:
The processor board is designed with universal capability to support multiple physiological parameter measurements through a single part number. The board includes multiple sensor interfaces and configurable firmware that can be adapted to measure different parameters (SpO2, HbCO, HbMet, etc.), eliminating the need for separate part numbers for each parameter combination.
Solution Approach 2:
The system uses firmware configuration and software-based parameter selection rather than hardware variations. By changing the firmware configuration and enabled parameters, the same processor board can be transformed to measure different physiological parameters, avoiding the complexity of managing multiple hardware variants.
2Ease of manufacture
If processor boards are configured with fixed firmware at production, then manufacturing simplicity is maintained, but adaptability to changing user requirements and future upgrades is limited
Solution Approach 1:
The processor board employs dynamic firmware that can be updated and reconfigured after production. The system allows firmware updates through standard interfaces, enabling the board to adapt to new requirements, support additional parameters, or receive performance improvements without requiring physical board replacement.
Solution Approach 2:
The processor board is pre-configured with a baseline firmware that includes the capability to receive updates. The firmware structure is designed from the outset to support future parameter additions and modifications, allowing the system to maintain manufacturing simplicity while preserving upgradeability through planned architectural decisions.
3Adaptability or versatility
If a comprehensive processor board supports all possible physiological parameters, then maximum versatility is achieved, but the initial cost and complexity of the board increases
Solution Approach 1:
The processor board incorporates universal sensor interfaces and processing capabilities that can handle multiple physiological parameter types. By using a single versatile board design with configurable firmware, the system achieves maximum parameter support without creating separate specialized boards for each parameter combination.
Solution Approach 2:
The system achieves versatility through software parameter configuration rather than hardware complexity. The firmware can be configured to enable or disable specific parameter measurements based on user needs, allowing the same hardware platform to adapt to different application requirements without increasing physical board complexity.
4Adaptability or versatility
If in-field firmware updates are implemented, then adaptability and future upgrades are enabled, but the risk of introducing errors and reducing system reliability increases
Solution Approach 1:
The firmware update system incorporates feedback mechanisms including version tracking, update verification, and error detection. The system monitors the firmware state and can verify update integrity, providing feedback to ensure that updates are applied correctly and maintaining system reliability throughout the upgrade process.
Solution Approach 2:
The system implements protective measures before firmware updates, including backup creation, validation checks, and rollback capabilities. These beforehand cushioning measures ensure that if an update fails or introduces errors, the system can recover to a known good state, thereby protecting system reliability while enabling upgrades.
Data Source
AI summary
A physiological monitor has a sensor port configured to attach and communicate with a sensor. A processor board is in communications with the sensor port and has a board digital signal processor (DSP). Firmware residing on the processor board is executable by the board DSP so as to calculate physiological parameters in response to a sensor signal received from the sensor. Upgrade tools are individually attachable to the sensor port in lieu of the sensor so as to designate to the processor board which of the physiological parameters, if any, to calculate when the sensor is attached to the sensor port.