Surgical Humidifier Control for Flow-Dependent Temperature Stability
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Solution Overview
Problem
Existing surgical humidifiers struggle to maintain consistent temperature and humidity levels across varying flow rates, leading to potential cellular damage, adhesion formation, and increased post-operative pain.
Innovation Solution
The described method and system for a surgical humidifier include a control system that adjusts the power to a heater plate based on flow rate readings from a flow sensor, allowing for consistent output and adaptive control across different flow rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a fixed power level is applied to the heater plate, then the device is simple to operate, but the temperature consistency across varying flow rates deteriorates
Solution Approach 1:
The heater plate power is dynamically adjusted based on real-time flow rate measurements. The control system continuously monitors flow rate and modifies heater power accordingly, transitioning from a static fixed-power approach to a dynamic adaptive approach that maintains temperature consistency across varying surgical conditions.
Solution Approach 2:
A feedback control loop is implemented where the flow sensor provides real-time flow rate information to the control system, which then adjusts the heater plate power to maintain consistent output temperature. This closed-loop feedback mechanism ensures temperature stability despite changes in gas flow conditions.
2Stability of the object's composition
If the heater plate power is continuously adjusted to maintain consistent temperature, then the temperature consistency is improved, but the device complexity increases
Solution Approach 1:
The control system integrates multiple functions into a single integrated unit: flow rate sensing, temperature monitoring, power adjustment, and overall system coordination. This multi-functional approach consolidates what could be separate complex subsystems into one coordinated control mechanism, reducing overall device complexity while maintaining temperature consistency.
Solution Approach 2:
The system adjusts the power parameter of the heater plate based on flow rate conditions. By changing this single critical parameter dynamically, the system achieves temperature consistency without requiring complex mechanical or structural modifications, thereby limiting the increase in device complexity.
3Loss of time
If the humidifier is pre-heated before gas flow starts, then the readiness time is reduced, but the energy consumption increases
Solution Approach 1:
The humidifier chamber and heater plate are pre-heated to the target temperature before gas flow begins. This preliminary heating action ensures that when surgery starts, the humidifier is immediately ready to deliver consistently temperature-controlled gas, eliminating delays and the need for mid-procedure temperature adjustments.
Solution Approach 2:
The heating system operates in periodic cycles: intensive pre-heating before surgery, followed by maintenance-mode heating during surgery. The control system modulates heater power to maintain temperature during gas flow while reducing power consumption during idle periods, balancing readiness with energy efficiency.
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 ensures that the humidified gas is delivered at a consistent temperature and humidity, reducing cellular damage, adhesion formation, and post-operative pain, while also improving surgical efficiency and patient recovery.
Implementation Method 1
providing electrical power to a heater plate in the surgical humidifier according to the power requirement
Implementation Method 2
receiving a flow rate reading from a flow sensor configured to sense a flow rate of a gas exiting a chamber of the surgical humidifier
Data Source
AI summary
Some embodiments provide for humidifier control systems and methods configured to adjust power to a heater plate in a surgical humidifier to account for changes in flow rate to provide a consistent output, to provide functionality for different modes of use, and to provide accurate control over temperature and/or humidity at relatively low flows. The humidifier control system can receive a flow rate reading and determine a power requirement corresponding to the received flow rate reading, wherein the power requirement is one of a plurality of set points which correspond to ranges of flow rates. The humidifier control system can determine a mode of use based at least in part on the flow rate reading. The humidifier control system can provide electrical power to the heater plate according to the power requirement and/or the mode of use.