Isolette Temperature Control for MRI Transport
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Solution Overview
Problem
Existing isolettes for infants in MRI environments face challenges with temperature regulation during transport between different environments, leading to inefficient heating or cooling, potential patient safety issues due to artifacts in imaging, and cumbersome design that restricts access and image quality.
Innovation Solution
A modular isolette with a temperature control system that adjusts heater power based on ambient temperature changes, using a PID controller to maintain a stable temperature setpoint, and incorporates MR-compatible components to minimize artifacts and enhance safety and accessibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If heater power is increased to compensate for ambient temperature drops during transport, then temperature stability inside the isolette is improved, but energy consumption and risk of overheating increase
Solution Approach 1:
The heater power is dynamically adjusted based on real-time ambient temperature sensing. The control system continuously monitors ambient conditions and modulates heater output accordingly, transitioning from static to dynamic operation to optimize both temperature stability and energy efficiency during transport between different environmental zones.
Solution Approach 2:
A temperature sensing system provides feedback to the control unit, which adjusts heater power output based on the measured ambient temperature. This closed-loop feedback mechanism prevents excessive energy consumption by reducing heater power when ambient temperatures are already elevated, while maintaining temperature stability when ambient conditions are cooler.
2Stability of the object's composition
If heater power is increased to maintain temperature during transport, then temperature control is improved, but artifacts in MRI imaging are generated
Solution Approach 1:
The heater and temperature control electronics are extracted from the MRI scan room environment and positioned in the isolette's external housing. This spatial separation removes the source of thermal artifacts from the imaging volume, allowing temperature control to be maintained during transport without compromising MRI image quality.
Solution Approach 2:
The isolette's insulated enclosure acts as an intermediary barrier between the temperature control systems and the MRI imaging environment. This intermediary structure allows thermal management functions to operate externally while maintaining a stable internal environment for the infant, preventing interference with the MRI scan.
3Ease of operation
If the isolette is designed as a single integrated unit for transport, then ease of transport is improved, but accessibility to different hospital sections is reduced
Solution Approach 1:
The system is segmented into a portable isolette unit and a stationary MRI scanning system. The isolette can be independently transported to the MRI suite and positioned on the patient table, allowing flexible access to different hospital sections while maintaining ease of transport for the infant care component.
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
The solution enables precise temperature control within the isolette during environmental changes, ensures patient safety, and allows for uninterrupted and high-quality MRI imaging without compromising equipment or user safety, facilitating efficient and safe transport and imaging procedures.
Implementation Method 1
a heater for providing heat to the patient section
Implementation Method 2
obtaining a temperature of ambient air external to the isolette
Implementation Method 3
using a PID controller to maintain a stable temperature setpoint
Data Source
AI summary
An apparatus and method of controlling a temperature within an isolette includes obtaining a temperature of ambient air external to the isolette, obtaining a base-line ambient air temperature, and calculating a maximum heater power level based on a relationship between the base-line ambient air temperature and the actual ambient air temperature.