Heating Blanket Timer for Surgical Patient Safety
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Solution Overview
Problem
Existing electric warming blankets for surgical patients lack adequate safety features to prevent thermal burn injuries due to unreliable temperature sensors, which can fail to accurately report blanket temperatures, leading to prolonged exposure to excessive heat.
Innovation Solution
Incorporating a timer mechanism that automatically cuts off power to the heating element after a predetermined time, regardless of temperature sensor feedback, to ensure patient safety by limiting exposure to excessive heat.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a temperature sensor is used to monitor blanket temperature, then the safety against overheating is improved, but the reliability of temperature monitoring deteriorates due to sensor failure or inaccurate readings
Solution Approach 1:
The timer mechanism performs a preliminary safety action by automatically cutting off power after a predetermined time period, preventing overheating before the temperature sensor can detect it. This preliminary action compensates for potential sensor failures or inaccurate readings by establishing a time-based safety threshold that operates independently of temperature measurement accuracy.
2Ease of operation
If the temperature sensor monitors the blanket temperature continuously, then the temperature control is improved, but the safety against false readings deteriorates
Solution Approach 1:
The timer mechanism provides beforehand cushioning by establishing a maximum time limit that acts as a safety buffer against false temperature readings. Even if the temperature sensor provides inaccurate information due to external factors like cool objects or sensor damage, the timer ensures power is cut off after a predetermined period, preventing thermal burn injuries.
3Productivity
If the power supply is continued based on temperature sensor feedback, then the heating effectiveness is improved, but the risk of thermal burn injury increases
Solution Approach 1:
The system incorporates feedback from the temperature sensor to control power supply for heating effectiveness, while simultaneously implementing a timer-based safety mechanism that provides independent feedback on time elapsed. This dual feedback system allows the blanket to maintain heating effectiveness based on temperature readings while automatically preventing thermal burn injuries by cutting off power after a predetermined time period regardless of sensor feedback.
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
This solution provides an additional safety layer that prevents thermal burn injuries by ensuring the heating blanket is powered off before the blanket reaches dangerous temperatures, even if the temperature sensor malfunctions, thereby protecting patients from prolonged exposure to excessive heat.
Implementation Method 1
a heating element assembly... adapted to supply power to the heating element assembly
Implementation Method 2
a temperature sensor assembly adapted to monitor the temperature of the heating element assembly and provide the heating element assembly temperature to the controller
Data Source
AI summary
A blanket for warming patients during surgery and other medical procedures. The blanket includes one or more temperature sensors and a shut-off timer to prevent prolonged exposure of excessive heat to a patient. Embodiments of the present invention provide a safety feature that cuts power to a heating blanket after a certain period of time has elapsed, irrespective of the feedback provided by a temperature sensor concerning the blanket temperature. That period of time is longer than it takes for the blanket to reach its threshold temperature but shorter than it takes to cause thermal burn injury.