Airway Opening Position Control With Single-Sensor Neck Support
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Solution Overview
Problem
Existing devices for automatically adjusting airway opening positions, such as those for obese patients, require multiple tilt angle sensors, leading to a complex structure and reduced wearing comfort.
Innovation Solution
A method for controlling the airway opening device using a single tilt angle sensor and a programmable logic controller (PLC) to adjust the neck and back support angles, integrating sniffing and ramped positions, with equations to control the electric cylinder's stroke for optimal airway opening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple tilt angle sensors are arranged on the head cover to detect angles for obese patients, then the airway opening accuracy is improved, but the device structure becomes more complicated and wearing comfort deteriorates
Solution Approach 1:
The patent merges the functions of multiple tilt angle sensors into a single tilt angle sensor. The single sensor detects both the first angle (between external acoustic meatus and sternal angle) and the second angle (between external acoustic meatus and horizontal plane), eliminating the need for separate sensors and simplifying the overall device structure while maintaining measurement accuracy for obese patients
Solution Approach 2:
The single tilt angle sensor is designed to perform multiple measurement functions simultaneously. It can detect different angular parameters (first angle and second angle) required for both sniffing position and ramped position adjustments, making the sensor multi-functional and reducing the total component count
2Measurement precision
If multiple tilt angle sensors are arranged on the head cover to detect angles for obese patients, then the airway opening accuracy is improved, but the wearing comfort deteriorates
Solution Approach 1:
The patent merges the functions of multiple tilt angle sensors into a single tilt angle sensor. The single sensor detects both the first angle (between external acoustic meatus and sternal angle) and the second angle (between external acoustic meatus and horizontal plane), eliminating the need for separate sensors and simplifying the overall device structure while maintaining measurement accuracy for obese patients
Solution Approach 2:
The patent uses a single tilt angle sensor to copy or replicate the measurement capabilities that would otherwise require multiple sensors. By strategically positioning one sensor and using computational methods, the system replicates the angular detection functions of multiple sensors, reducing hardware complexity and improving wearability
3Reliability
If separate detection methods are used for sniffing position and ramped position, then the airway opening effectiveness is improved, but the device structure and control system become more complicated
Solution Approach 1:
The single tilt angle sensor serves universal measurement purposes for both sniffing position and ramped position adjustments. The sensor collects angular data that is processed by the PLC to determine appropriate head elevation amounts for different patient types, eliminating the need for separate detection systems while maintaining effectiveness for both positioning methods
Solution Approach 2:
The system changes measurement parameters dynamically based on patient type. The single sensor collects raw angular data, and the PLC processes this data differently depending on whether the patient is normal/thin or obese, calculating appropriate head elevation amounts using different computational approaches for each patient category
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 method simplifies the device structure, enhances wearing comfort, and effectively opens the airway for most patients, achieving a clear glottic view with minimal adverse reactions.
Implementation Method 1
a tilt angle sensor arranged on a positioning plate... to detect the angle between a connecting line from an external acoustic meatus of a patient to a mandibular angle of the patient
Implementation Method 2
an electric cylinder arranged on a bracket and having a telescopic rod facing down vertically... a second transmission pin penetrated in the second sliding groove is arranged at an end of the telescopic rod of the electric cylinder
Data Source
AI summary
A method for controlling a device for automatically adjusting an airway opening body position is provided. The device includes a horizontal base plate, a head support block, a back support plate, a neck support apparatus, a head cover assembly, and a programmable logic controller (PLC). The neck support apparatus is positioned between the head support block and the back support plate. The PLC is configured to controls a stroke of an electric cylinder according to the following equations: θ=1.235β+α, and α=KX+B+C, where θ is a body position angle, the body position angle is an angle between a positive projection line of a connecting line from a mandibular angle to an external acoustic meatus on a symmetrical surface of a human body and the back support plate, and θ is a preset value ranging from 90° to 100°.