Infusion Pump Surface Temperature Control Using Accelerometer Feedback
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Solution Overview
Problem
Infusion pumps generate heat during operation, leading to discomfort and potential injury when in direct contact with the patient, while maintaining performance in non-ambulatory configurations where higher temperatures are tolerated.
Innovation Solution
An infusion pump equipped with an accelerometer to differentiate between ambulatory and non-ambulatory configurations, adjusting power consumption and dissipation to maintain housing temperature within safe limits, using a temperature control unit to modify pump features such as battery charging, display settings, and communication frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pump operates at high power consumption to maintain performance, then the pump delivers reliable medication infusion, but the pump surface temperature increases causing patient discomfort and potential injury
Solution Approach 1:
The pump dynamically adjusts its power consumption based on detected motion states. The control system monitors accelerometer data to determine whether the pump is in ambulatory or non-ambulatory configuration, and automatically modifies operational parameters including power consumption levels to maintain reliability while preventing excessive temperature rise during patient contact
Solution Approach 2:
The system changes operational parameters (power consumption, processing frequency, communication frequency, display refresh rate) based on the detected pump state. When ambulatory motion is detected, the system reduces power consumption parameters to limit temperature, while maintaining full performance in non-ambulatory settings where temperature control is less critical
2Object-affected harmful factors
If the pump reduces power consumption to limit surface temperature, then patient comfort is improved, but pump performance and reliability deteriorate
Solution Approach 1:
The pump dynamically adjusts its power consumption based on detected motion states. The control system monitors accelerometer data to determine whether the pump is in ambulatory or non-ambulatory configuration, and automatically modifies operational parameters including power consumption levels to maintain reliability while preventing excessive temperature rise during patient contact
Solution Approach 2:
The system uses accelerometer feedback to continuously monitor pump motion and configuration state. This feedback loop enables the control system to make real-time adjustments to power consumption, ensuring temperature remains safe during patient contact while restoring full performance when the pump is stationary or in non-ambulatory configuration
3Ease of operation
If the pump is designed for ambulatory use with portable battery power, then patient mobility is improved, but the pump generates more heat due to battery power dissipation
Solution Approach 1:
The pump dynamically adjusts its power consumption based on detected motion states. The control system monitors accelerometer data to determine whether the pump is in ambulatory or non-ambulatory configuration, and automatically modifies operational parameters including power consumption levels to maintain reliability while preventing excessive temperature rise during patient contact
Solution Approach 2:
The system implements periodic monitoring of accelerometer data to detect changes in pump configuration state. This periodic sensing enables the system to adapt power consumption patterns accordingly, managing thermal output during ambulatory periods while maintaining full performance when stationary
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Maintains patient comfort by limiting surface temperature in ambulatory use while optimizing performance in non-ambulatory settings, ensuring safe and efficient operation.
Implementation Method 1
an accelerometer configured to detect at least one of pump motion and pump angular orientation
Implementation Method 2
the power provided by the power source, such as a battery may dissipate energy and heat up pump components and the pump housing
Data Source
AI summary
An infusion pump includes a housing, a pumping mechanism, an accelerometer configured to detect at least one of pump motion and pump angular orientation, and a temperature control unit. The temperature control unit is configured to receive accelerometer data and determine a pump configuration based on the accelerometer data. The pump configuration may include a contact configuration or a non-contact configuration. The temperature control unit is also configured to establish a threshold housing temperature based on the determined pump configuration. Additionally, the temperature control unit is configured to modify at least one pump feature or function to maintain the housing below the threshold housing temperature.