Method and system for evaluation of a neuromuscular monitoring device

Abstract

This invention discloses an evaluation method and system for a muscle relaxation monitoring device. The method includes: acquiring current pulse data of the muscle relaxation monitoring device under test in a preset working mode; converting the current stimulation pulse of the muscle relaxation monitoring device under test into voltage pulse signals and attenuation signals through an adjustable load module in a detection device, and displaying the voltage pulse signals in chronological order; controlling the drive module through a main control module in the detection device in response to the attenuation signal, so that the motion platform module reproduces the motion of the set muscle relaxation value in the working mode; acquiring the motion data reproduced by the motion platform module through an accelerometer fixed on a thumb-like structure on the motion platform module, and determining the displayed muscle relaxation value of the muscle relaxation monitoring device under test in the preset working mode based on the motion data; comparing the set muscle relaxation value with the displayed muscle relaxation value of the muscle relaxation monitoring device under test to complete the test of the muscle relaxation monitoring device under test.

Description

Technical Field

[0001] This invention relates to the field of muscle relaxation monitoring equipment detection technology, specifically to an evaluation method and system for muscle relaxation monitoring equipment. Background Technology

[0002] The electrical stimulation pulses used in muscle relaxation monitoring devices are typically high-frequency, narrow-pulse types, with output current amplitudes generally ranging from 5mA to 50mA (corresponding to a 10kΩ load and a voltage of approximately 50V to 500V). Due to the high output amplitude, these devices pose certain electrical safety risks in practical use. The accuracy and long-term stability of their electrical stimulation parameters directly affect the stimulation effect and operational safety. Furthermore, influenced by the dynamic response characteristics of human muscles, the acceleration measured in muscle relaxation monitoring is not a single stable value but a complex waveform encompassing acceleration, deceleration processes, and specific time characteristics, resulting in a complex signal morphology. The muscle relaxation monitoring process is divided into an onset plateau phase, an onset period, a maintenance phase, an elimination phase, and an elimination plateau phase. During this process, the acceleration value gradually decreases from its maximum value during the onset plateau phase as muscle relaxation takes effect, reaching zero during the maintenance phase, gradually increasing during the elimination phase, and returning to its second-largest value during the elimination plateau phase. Parameters of interest include peak acceleration, response time, TOFR value, and acceleration-time curve.

[0003] Currently, there are no dedicated testing methods and supporting equipment for muscle relaxation monitoring devices. Conventional accelerometer testing methods cannot establish a direct and reliable correspondence with the values ​​obtained from muscle relaxation monitoring, which makes it difficult to evaluate the performance and trace the measurement values ​​of such devices. Summary of the Invention

[0004] In view of this, the present invention provides an evaluation method and system for muscle relaxation monitoring equipment, which solves the problem in the prior art that it is difficult to establish a direct and reliable correspondence with the values ​​obtained from muscle relaxation monitoring, thus making it difficult to evaluate the performance and trace the measurement values ​​of such equipment.

[0005] To achieve one, some, or all of the above objectives, or other objectives, in a first aspect, the present invention proposes an evaluation method for a muscle relaxation monitoring device, characterized in that it includes:

[0006] Acquire current pulse data of the muscle relaxation monitoring device under the preset working mode; The adjustable load module in the detection device determines the voltage pulse signal and attenuation signal of the muscle relaxation monitoring device under the preset working mode based on the current pulse data, and displays the voltage pulse signal in chronological order. The main control module in the detection device responds to the attenuation signal, causing the main control module to control the drive module to run with preset control parameters corresponding to the preset working mode, thereby enabling the motion platform module to reproduce the motion according to the set muscle relaxation value in the preset working mode. The motion data of the motion platform module during motion reproduction is obtained by an accelerometer fixed on the thumb-like structure on the motion platform module, and the displayed muscle relaxation value of the muscle relaxation monitoring device under the preset working mode is determined based on the motion data. The set muscle relaxation value is compared with the displayed muscle relaxation value of the muscle relaxation monitoring device to complete the test of the muscle relaxation monitoring device.

[0007] Optionally, the preset working modes include: single stimulation mode, serial stimulation mode, tetanic stimulation mode, and double burst stimulation mode.

[0008] Optionally, the step of having the main control module in the detection device respond to the attenuation signal, causing the main control module to control the drive module to operate with preset control parameters corresponding to a preset working mode, thereby enabling the motion platform module to reproduce the motion according to the set muscle relaxation value in the preset working mode, includes: The main control module in the detection device responds to the rising edge of the attenuation signal and determines the acceleration value corresponding to the set muscle relaxation value according to the acceleration-time characteristic curve in the preset control parameters. Based on the acceleration value, using a preset formula:

[0009] The position control parameters for the motion platform module to reproduce standard muscle relaxation movements are determined, where L is the movement distance of the thumb-like structure on the motion platform module, t is time, u is the current moment, and a is the acceleration value; The motion platform module in the detection device is controlled according to the position control parameters so that the motion platform module can reproduce the motion corresponding to the set muscle relaxation value.

[0010] On the other hand, this application provides an evaluation system for a muscle relaxation monitoring device, the system comprising: Adjustable load module, digital oscilloscope module, main control module, drive module, motion platform module; The main control module is used to control the operation of the relay group within the adjustable load module to adjust the load resistance value of the adjustable load module. The input terminal of the adjustable load module is connected to the electrical pulse output terminal of the muscle relaxation monitoring device under test to receive the current pulse data of the muscle relaxation monitoring device under test in a preset working mode. The adjustable load module is used to convert the current pulse data of the muscle relaxation monitoring device under test into voltage pulse signals and attenuation signals, and transmit the voltage pulse signals to the digital oscilloscope module. The digital oscilloscope module is used to display the voltage pulse signal in chronological order. The adjustable load module is also used to send the attenuation signal to the main control module so that the main control module responds to the attenuation signal and controls the drive module to run with preset control parameters corresponding to the preset working mode, thereby enabling the motion platform module to reproduce the motion of the set muscle relaxation value in the preset working mode. The motion data of the motion platform module when performing motion reproduction for a set muscle relaxation value is obtained by an accelerometer fixed on the thumb-like structure on the motion platform module, and the displayed muscle relaxation value of the muscle relaxation monitoring device under test is determined based on the motion data; the set muscle relaxation value and the displayed muscle relaxation value are compared to complete the test of the muscle relaxation monitoring device under test.

[0011] Optionally, the adjustable load module includes a high-frequency thick-film resistor, a relay group, and a balancing attenuator. The high-frequency thick-film resistor and the balancing attenuator are connected in parallel. The relay group is used to adjust the resistance value of the adjustable load module. The balancing attenuator is used to determine the attenuation signal of the muscle relaxation monitoring device under test in the preset operating mode based on the voltage pulse signal. The high-frequency thick-film resistor is used to determine the voltage pulse signal of the muscle relaxation monitoring device under test in the preset operating mode based on the current pulse data.

[0012] Optionally, the preset control parameters are response time, acceleration-time curve, and TOFR value determined based on data in an existing medical database and set according to the peak acceleration.

[0013] Optionally, the motion platform module includes a coreless linear motor and a thumb-like structure, wherein the coreless linear motor is used to receive the drive signal from the drive module so that the thumb-like structure fixed on the mover of the coreless linear motor reproduces the movement according to a set muscle relaxation value in a preset working mode.

[0014] Optionally, the motion platform module further includes a position sensor, a linear guide rail, and a limit switch.

[0015] Optionally, the main control module is built using an embedded system.

[0016] Implementing the embodiments of the present invention will have the following beneficial effects: The muscle relaxation monitoring equipment using accelerometer (AMG) can measure the electrical stimulation pulses of the muscle relaxation monitoring equipment and simulate the acceleration characteristics, providing a technical basis for its performance verification, quality control and daily operation and maintenance. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] in: Figure 1 This is a flowchart of an evaluation method for a muscle relaxation monitoring device provided in an embodiment of this application; Figure 2 This is a schematic diagram of the structure of an assessment system for a muscle relaxation monitoring device provided in an embodiment of this application; 1. The muscle relaxation monitoring device to be tested; 2. Adjustable load module; 3. Digital oscilloscope module; 4. Main control module; 5. Drive module; 6. Motion platform module; 7. Accelerometer sensor. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] like Figure 1 As shown in the embodiment of this application, an evaluation method for a muscle relaxation monitoring device is provided, including: S101. Acquire the current pulse data of the muscle relaxation monitoring device under the preset working mode; S102. Using the adjustable load module in the detection device, determine the voltage pulse signal and attenuation signal of the muscle relaxation monitoring device under the preset working mode based on the current pulse data, and display the voltage pulse signal in chronological order. S103. The main control module in the detection device responds to the attenuation signal, causing the main control module to control the drive module to run with preset control parameters corresponding to the preset working mode, thereby enabling the motion platform module to reproduce the motion according to the set muscle relaxation value in the preset working mode. S104. Obtain motion data of the motion platform module when performing motion reproduction by using an accelerometer fixed on the thumb-like structure on the motion platform module, and determine the displayed muscle relaxation value of the muscle relaxation monitoring device under the preset working mode based on the motion data. S105. Compare the set muscle relaxation value with the displayed muscle relaxation value of the muscle relaxation monitoring device to complete the test for the muscle relaxation monitoring device.

[0021] For example, the electrical stimulation output wire of the muscle relaxation monitoring device under test is connected to the adjustable load module of the invention to form a series circuit. The acceleration sensor of the muscle relaxation monitoring device is fixed on the thumb-like structure of the motion platform module of the invention according to the usage requirements of the device. The adjustable load module adjusts a specific load (generally 10kΩ), and the electrical stimulation current pulse generates a corresponding voltage pulse signal on the load. The digital oscilloscope measures the voltage pulse signal. The main control module controls the position reset of the motion platform module, and determines the motion boundary of the linear motor of the motion platform through the position information of the motion platform module 6. The muscle relaxation monitoring device under test is selected as ST (single stimulation) mode, and the acceleration peak value (reference value), response time and acceleration- are selected. The invention enters the reference value correction mode for muscle relaxation monitoring via a time curve. It acquires a single ultra-strong stimulus; the stimulus pulse is converted into a voltage pulse signal by an adjustable load module. A digital oscilloscope module measures the relevant values ​​of the voltage pulse signal. Combined with the load resistance value, the pulse width, pulse amplitude, and pulse interval / frequency of the electrical stimulation can be measured. After the voltage pulse signal passes through a 100:1 balanced attenuator, the attenuated signal is output as a trigger signal to the main control module. The main control module uses the rising edge of the trigger signal as the reference time zero point and drives the motion platform to move according to the set acceleration peak value, response time, and acceleration-time curve. The muscle relaxation monitoring device under test measures the acceleration-time curve and completes the reference value measurement based on the measured acceleration peak value.

[0022] For example, the muscle relaxation monitoring device under test is selected as TOF (four-in-a-row stimulation) mode. Based on the peak acceleration (reference value), the response time, acceleration-time curve, and TOFR value are set. The stimulation mode of the muscle relaxation monitoring device under test is selected as TOF (four-in-a-row stimulation), and four series of stimulation pulses are output. The stimulation pulses are converted into voltage pulse signals by an adjustable load module. The digital oscilloscope module measures the relevant values ​​of the voltage pulse signal. Combined with the load resistance value, the pulse width, pulse amplitude, and pulse interval / frequency of the electrical stimulation can be measured. After the voltage is balanced by a 100:1 attenuator, the attenuated signal is output as a trigger signal to the main control module. The main control module uses the rising edge of the trigger signal as the reference time zero point and drives the motion platform to move according to the set peak acceleration, response time, and acceleration-time curve. The muscle relaxation monitoring device under test measures the acceleration-time curve, and the muscle relaxation value is measured based on the measured peak acceleration.

[0023] In one possible implementation, the preset operating modes include: single stimulation mode, chain stimulation mode, tetanic stimulation mode, and double burst stimulation mode.

[0024] In one possible implementation, the step of having the main control module in the detection device respond to the attenuation signal, causing the main control module to control the drive module to operate with preset control parameters corresponding to a preset working mode, thereby enabling the motion platform module to reproduce the motion according to the set muscle relaxation value in the preset working mode, includes: The main control module in the detection device responds to the rising edge of the attenuation signal and determines the acceleration value corresponding to the set muscle relaxation value according to the acceleration-time characteristic curve in the preset control parameters. Based on the acceleration value, using a preset formula:

[0025] The position control parameters for the motion platform module to reproduce standard muscle relaxation movements are determined, where L is the movement distance of the thumb-like structure on the motion platform module, t is time, u is the current moment, and a is the acceleration value; The motion platform module in the detection device is controlled according to the position control parameters so that the motion platform module can reproduce the motion corresponding to the set muscle relaxation value.

[0026] For example, the invention uses existing medical databases to reference the peak acceleration, response time, and acceleration-time curve values ​​to ensure that the generated acceleration data conforms to physiological characteristics.

[0027] For an acceleration-time characteristic curve that is a continuous curve, the acceleration value changes continuously with time, expressed by the formula:

[0028] In the formula, a is the acceleration value, t is taken as the reference zero point at the rising edge of the electrical stimulation signal, the curve waveform is similar to the underdamped decaying oscillating wave, the maximum value of the acceleration value in the curve corresponds to the acceleration peak value, and the corresponding time point is the response time.

[0029] Since the initial acceleration is 0, and the fingers are stationary before muscle relaxation stimulation, the relationship between the movement distance L and time t is established using the finger's stationary point as the reference zero distance, expressed by the formula:

[0030] Based on the above distance-time relationship, position control data is generated. Using position control mode, the rising edge of the electrical stimulation signal as the reference time zero point, and the position reset point of the motion platform module as the distance reference zero point, the main control module drives the motion platform module to perform actions, thus completing the reproduction of the acceleration-time curve.

[0031] In one possible implementation, such as Figure 2 As shown, the present invention provides an evaluation system for a muscle relaxation monitoring device, the system comprising: 2. Adjustable load module; 3. Digital oscilloscope module; 4. Main control module; 5. Drive module; 6. Motion platform module; The main control module 4 is used to control the operation of the relay group in the adjustable load module 2 to adjust the load resistance value of the adjustable load module 2. The input terminal of the adjustable load module 2 is connected to the electrical pulse output terminal of the muscle relaxation monitoring device 1 under test, so as to receive the current pulse data of the muscle relaxation monitoring device 1 under test in a preset working mode. The adjustable load module 2 is used to convert the current pulse data of the muscle relaxation monitoring device 1 under test into voltage pulse signal and attenuation signal, and transmit the voltage pulse signal to the digital oscilloscope module 3. The digital oscilloscope module 3 is used to display the voltage pulse signal in chronological order; The adjustable load module 2 is also used to send the attenuation signal to the main control module 4, so that the main control module 4 responds to the attenuation signal and controls the drive module 5 to run with the preset control parameters corresponding to the working mode, thereby enabling the motion platform module 6 to reproduce the motion of the set muscle relaxation value in the preset working mode. The muscle relaxation monitoring device under test acquires motion data when the motion platform module 6 reproduces motion for a set muscle relaxation value through an accelerometer 7 fixed on the thumb-like structure on the motion platform module 6, and determines the displayed muscle relaxation value of the device in a preset working mode based on the motion data; the set muscle relaxation value is compared with the displayed muscle relaxation value to complete the test of the muscle relaxation monitoring device under test.

[0032] For example, the main control module 4 receives a trigger signal from the adjustable load module 2 and position information from the motion platform module 6. Based on the set acceleration curve, it drives the drive module 5 when the trigger signal arrives. The main control module 4 is an embedded system operating in pure digital mode. It stores different types of acceleration curves and can adjust the peak acceleration, response time, and acceleration / deceleration process to form complex waveforms as needed. Furthermore, it converts the acceleration characteristic curves into a drive pulse-time sequence to drive the drive module 5. The main control module 4 functions as a motion controller.

[0033] In one possible implementation, the adjustable load module 2 includes a high-frequency thick-film resistor, a relay group, and a balancing attenuator. The high-frequency thick-film resistor and the balancing attenuator are connected in parallel. The relay group is used to adjust the resistance value of the adjustable load module 2. The balancing attenuator is used to determine the attenuation signal of the muscle relaxation monitoring device 1 under the preset operating mode based on the voltage pulse signal. The high-frequency thick-film resistor is used to determine the voltage pulse signal of the muscle relaxation monitoring device 1 under the preset operating mode based on the current pulse data.

[0034] For example, the adjustable load module 2 consists of a series of high-frequency thick-film resistors with a load range of 500Ω to 20kΩ and a step size of 100Ω. Resistance switching is achieved through a relay group, and the main control module 4 controls the relay group to switch to the set load resistance value. The two wires of the electrical stimulation output pulse from the muscle relaxation monitoring device are connected to the two ends of the series-connected thick-film resistors. The adjustable load module 2 converts the stimulation current pulse into a voltage pulse signal, which is sent to the digital oscilloscope module 3. The adjustable load module 2 internally has a 100:1 balanced attenuator, which is connected in parallel with the series-connected thick-film resistors. The attenuated signal is sent to module 4 as a trigger signal. The adjustable load module 2 can provide different load resistance values, enabling the detection of the performance of the electrical stimulation pulse from the muscle relaxation monitoring device under different loads.

[0035] In one possible implementation, the preset control parameter is a preset acceleration-time curve determined based on existing medical database data.

[0036] In one possible implementation, the motion platform module 6 includes a coreless linear motor and a thumb-like structure. The linear motor driver 5 has high and low frequency vibration suppression capabilities, receives control commands from the main control module 4, and drives the coreless linear motor according to the control commands, so that the thumb-like structure fixed to the coreless linear motor actuator reproduces the motion characteristics of a set muscle relaxation value.

[0037] For example, the motion platform module 6 includes a single degree of freedom and has a coreless linear motor stator, a coreless linear motor mover, and a thumb-like structure.

[0038] In one possible implementation, the motion platform module 6 further includes a position sensor, a linear guide, and a limit switch.

[0039] For example, compared to conventional solutions, it has advantages such as higher acceleration and deceleration variation capabilities, excellent motion accuracy, high positioning accuracy, and high operating efficiency. A thumb-like structure is fixed on the linear motor actuator to secure the acceleration sensor of the muscle relaxation monitoring device.

[0040] In one possible implementation, the main control module 4 is built using an embedded system.

[0041] For example, an embedded system is a dedicated computer system designed for a specific application and fully embedded within a controlled device.

[0042] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

[0043] The above description discloses only preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, equivalent variations made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. A method of evaluation of a neuromuscular monitoring device, characterized in that, include: Acquire current pulse data of the muscle relaxation monitoring device under the preset working mode; The adjustable load module in the detection device determines the voltage pulse signal and attenuation signal of the muscle relaxation monitoring device under the preset working mode based on the current pulse data, and displays the voltage pulse signal in chronological order. The main control module in the detection device responds to the attenuation signal, causing the main control module to control the drive module to run with preset control parameters corresponding to the preset working mode, thereby enabling the motion platform module to reproduce the motion according to the set muscle relaxation value in the preset working mode. The motion data of the motion platform module during motion reproduction is obtained by an accelerometer fixed on the thumb-like structure on the motion platform module, and the display value of the muscle relaxation monitoring device under the preset working mode is determined based on the motion data. The set muscle relaxation value is compared with the displayed muscle relaxation value of the muscle relaxation monitoring device to complete the test of the muscle relaxation monitoring device.

2. The evaluation method for the muscle relaxation monitoring device as described in claim 1, characterized in that, The preset working modes include: single stimulation mode, series stimulation mode, tetanic stimulation mode, and double burst stimulation mode.

3. The evaluation method for the muscle relaxation monitoring device as described in claim 1, characterized in that, The step of having the main control module in the detection device respond to the attenuation signal, causing the main control module to control the drive module to operate with preset control parameters corresponding to a preset working mode, thereby enabling the motion platform module to reproduce the motion according to the set muscle relaxation value in the preset working mode, includes: The main control module in the detection device responds to the rising edge of the attenuation signal and determines the acceleration value corresponding to the set muscle relaxation value according to the acceleration-time characteristic curve in the preset control parameters. Based on the acceleration value, using a preset formula: The position control parameters for the motion platform module to reproduce standard muscle relaxation movements are determined, where L is the movement distance of the thumb-like structure on the motion platform module, t is time, u is the current moment, and a is the acceleration value; The motion platform module in the detection device is controlled according to the position control parameters so that the motion platform module can reproduce the motion corresponding to the set muscle relaxation value.

4. An evaluation system for a muscle relaxation monitoring device, characterized in that, The system includes: Adjustable load module, digital oscilloscope module, main control module, drive module, motion platform module; The main control module is used to control the operation of the relay group within the adjustable load module to adjust the load resistance value of the adjustable load module. The input terminal of the adjustable load module is connected to the electrical pulse output terminal of the muscle relaxation monitoring device under test to receive the current pulse data of the muscle relaxation monitoring device under test in a preset working mode. The adjustable load module is used to convert the current pulse data of the muscle relaxation monitoring device under test into voltage pulse signals and attenuation signals, and transmit the voltage pulse signals to the digital oscilloscope module. The digital oscilloscope module is used to display the voltage pulse signal in chronological order. The adjustable load module is also used to send the attenuation signal to the main control module so that the main control module responds to the attenuation signal and controls the drive module to run with preset control parameters corresponding to the preset working mode, thereby enabling the motion platform module to reproduce the motion of the set muscle relaxation value in the preset working mode. The motion data of the motion platform module when performing motion reproduction for a set muscle relaxation value is obtained by an accelerometer fixed on the thumb-like structure on the motion platform module, and the displayed muscle relaxation value of the muscle relaxation monitoring device under test is determined based on the motion data; the set muscle relaxation value and the displayed muscle relaxation value are compared to complete the test of the muscle relaxation monitoring device under test.

5. The evaluation system for the muscle relaxation monitoring device as described in claim 4, characterized in that, The adjustable load module includes a high-frequency thick-film resistor, a relay group, and a balancing attenuator. The high-frequency thick-film resistor and the balancing attenuator are connected in parallel. The relay group is used to adjust the resistance value of the adjustable load module. The balancing attenuator is used to determine the attenuation signal of the muscle relaxation monitoring device under test in the preset working mode based on the voltage pulse signal. The high-frequency thick-film resistor is used to determine the voltage pulse signal of the muscle relaxation monitoring device under test in the preset working mode based on the current pulse data.

6. The evaluation system for the muscle relaxation monitoring device as described in claim 4, characterized in that, The preset control parameters are response time, acceleration-time curve, and TOFR value, which are determined based on data in the existing medical database and set according to the peak acceleration.

7. The evaluation system for the muscle relaxation monitoring device as described in claim 4, characterized in that, The motion platform module includes a coreless linear motor and a thumb-like structure. The coreless linear motor is used to receive the drive signal from the drive module so that the thumb-like structure fixed on the mover of the coreless linear motor can reproduce the movement of the thumb-like structure according to the preset muscle relaxation value in the preset working mode.

8. The evaluation system for the muscle relaxation monitoring device as described in claim 7, characterized in that, The motion platform module also includes a position sensor, a linear guide rail, and limit switches.

9. The evaluation system for the muscle relaxation monitoring device as described in claim 4, characterized in that, The main control module is built using an embedded system.

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