Muscle Relaxation Measurement Using Angular Velocity Sensors
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Solution Overview
Problem
Conventional methods for measuring muscle relaxation in clinical settings, such as applying constant electrical current stimulus, lack precision and safety monitoring, particularly in detecting the depth of anesthesia in patients.
Innovation Solution
A device incorporating an angular velocity sensor and a control unit with a main processor to detect and process motion information from a measurement site, applying stimulus current and ensuring safety within allowable body impedance ranges, while optionally using an acceleration sensor for more accurate measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional acceleration sensors are used to detect motion information, then the device structure is simple, but the measurement precision of muscle relaxation is insufficient
Solution Approach 1:
The patent replaces conventional acceleration sensors with angular velocity sensors (gyroscopes) to detect motion information. This substitution enables more precise measurement of thumb motion angles and angular velocities in response to electrical stimuli, thereby improving muscle relaxation measurement precision while maintaining acceptable device complexity through the use of modern sensor technology.
2Reliability
If electrical current stimulus is applied to measure muscle relaxation, then the measurement function is achieved, but safety monitoring is insufficient
Solution Approach 1:
The patent incorporates a control unit that processes motion information from the angular velocity sensor and provides feedback on measurement results. This feedback mechanism enables real-time monitoring of muscle relaxation responses, allowing for safety monitoring of electrical current application by detecting abnormal responses and adjusting stimulation parameters accordingly.
3Measurement precision
If uniaxial acceleration information is used, then the device is simple to operate, but the measurement accuracy for anesthesia depth is insufficient
Solution Approach 1:
The patent transitions from uniaxial acceleration measurement to multi-dimensional angular velocity measurement. The angular velocity sensor detects motion in multiple dimensions (angular velocity around different axes), providing comprehensive motion information that improves measurement accuracy for anesthesia depth assessment while maintaining ease of operation through automated processing.
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 device provides precise and safe measurement of muscle relaxation by accurately detecting angular velocity and acceleration information, enabling effective monitoring of anesthesia depth and patient safety.
Implementation Method 1
The response signal detection unit includes an angular velocity sensor for detecting the angular velocity information of the measurement site and transmitting the angular velocity information to the control unit
Implementation Method 2
The stimulus signal source applies the stimulus current to the measurement site through an output terminal under control of the main processor
Data Source
AI summary
Disclosed are a device for measuring muscle relaxation and a monitoring equipment. The device includes a response signal detection unit and a control unit. The response signal detection unit includes an angular velocity sensor for sensing the motion of a measurement site and outputting corresponding angular velocity information of the measurement site to the control unit. The control unit includes a main processor and a stimulus signal source connected to the main processor. The stimulus signal source applies stimulus current to the measurement site through an output terminal under control of the main processor. The main processor can process the motion information from the response signal detection unit.