KR20120091875A - Anaesthsia depth and facial nerve monitoring apparatus using emg signal and method thereof - Google Patents

Abstract

PURPOSE: An anesthesia depth and facial nerve monitoring apparatus and method are provided to display an anesthesia depth relatively using an electromyographic signal and to determine and warn the condition of a patient unable to have a surgery by using facial nerve signals from the patient. CONSTITUTION: A stimulation signal generating and reaction signal receiving unit(70) generates a stimulation signal and receives a reaction signal. Probe units(P1,P2,P3,P4) deliver reaction signals from muscles around eyes and a mouth and the surface of a face. An anesthesia depth and facial nerve monitoring unit(40) calculates an anesthesia depth based on the reaction signals received through the probe units from the patient. A control unit(10) controls the stimulation signal generating and reaction signal receiving unit and the anesthesia depth and facial nerve monitoring unit, displays an analysis signal through a monitor(50), and stores the calculated anesthesia depth damage to facial nerves into a data storage unit(60) in real time.

Description

Anesthesia depth and facial nerve monitoring device and method using EMG signal {ANAESTHSIA DEPTH AND FACIAL NERVE MONITORING APPARATUS USING EMG SIGNAL AND METHOD THEREOF}

The present invention relates to an anesthesia depth and facial nerve monitoring device and method using an EMG signal, and more particularly to anesthesia depth relative to the EMG signal and to receiving the nerve data of facial muscles before and after surgery The present invention relates to an anesthetic depth and facial nerve monitoring device and method using an EMG signal that can be used as a data to prevent accidents during surgery and to save data during actual surgery by warning and determining the inoperable state through data.

Anesthesia techniques and techniques for monitoring the condition of a patient in anesthesia are disclosed.

For example, according to Korean Patent Application No. 10-2003-7016303 (filed December 12, 2003, a method and apparatus for monitoring the state of consciousness), the state of consciousness of the conscious patient is monitored and the EEG signal A technique for automatically detecting transition states by obtaining is disclosed.

In addition, Korean Patent Application No. 10-1987-700279 (filed March 30, 1987, EEG and Anesthesia Monitor) discloses a technique for a method and apparatus for monitoring a subject's consciousness level. It is. That is, by applying a stimulus signal including a predetermined frequency of at least one component to the sensory organ of the subject, obtaining an electroencephalographic (EEG) signal from the subject while the stimulus signal is applied, and having an EEG having the predetermined frequency. A method of testing anesthesia depth or consciousness of a subject is provided by analyzing an EEG signal to determine the magnitude and / or phase of a signal component and evaluating the subject's anesthetic depth or consciousness with respect to the magnitude and / or phase of the component. do.

Information about anesthesia depth and consciousness level is of great benefit to those who administer the anesthetic because the anesthetic may be controlled to provide the desired anesthetic depth and consciousness level.

However, the method or apparatus as described above may be of value as data for simply providing anesthesia depth and consciousness level. However, the operation of the user (that is, medical staff) is inconvenient during surgery, and thus, proper measures are difficult during surgery.

An object of the present invention is to provide an anesthetic depth and facial nerve monitoring device using a new type of EMG signal that can be appropriately handled during the operation is easy to operate during the operation.

Still another object of the present invention is to provide a method for monitoring anesthesia and facial nerve using a new type of EMG signal which can be easily manipulated by a user during surgery.

Anesthetic depth and facial nerve monitoring device using an EMG signal according to a preferred embodiment of the present invention for achieving the above object, the stimulus signal generation and response signal receiving unit for generating a stimulation signal and receiving a response signal; Probe means connected to a muscle of a patient to transmit the stimulus signal and a response signal from a sensory organ of the patient; Anesthesia depth and facial nerve monitoring unit for calculating anesthesia depth based on the response signal from the patient through the probe means and analyzing the response signal according to facial nerve damage; And a controller configured to display and store the analysis signal based on the calculated anesthesia depth and facial nerve damage.

Preferably, the probe means comprises an electrode attached to the eyelid and mouth muscles of the patient, and an electrode attached to other muscles except the eyelid and mouth muscles of the facial muscles of the patient.

Stimulation signal generation and response signal receiving unit facial nerve stimulation signal generation and response signal receiving unit for receiving a response signal through the electrode attached to the eye and muscle around the patient to determine whether the facial nerve damage; And a fine stimulus signal generation and response signal receiving unit for receiving a response signal through an electrode attached to the muscles other than the eyelid and mouth muscles in the facial muscles of the patient to determine the anesthetic depth of the patient.

The anesthesia depth and facial nerve monitoring unit calculates the anesthesia depth after acquiring reference data after the patient's mind and body are stabilized.

The anesthesia depth and facial nerve monitoring unit calculates the anesthesia depth by comparing the reference data with the type and dose of the anesthetic drug for the patient.

The controller displays the calculated anesthesia depth in the form of a graph of a predetermined step.

The control unit generates an alarm when the operation is impossible as a result of calculating the anesthesia depth.

The control unit stores and manages the analysis signal according to the calculated anesthesia depth and facial nerve damage by storing the data for each patient.

Anesthesia depth and facial nerve monitoring method using an EMG signal according to a preferred embodiment of the present invention, connecting the probe means to the muscle of the patient; Receiving reference data from the patient prior to anesthesia via the probe means; After receiving the reference data, calculating anesthesia depth based on the response signal from the patient through the probe means, and analyzing the response signal according to facial nerve damage; And displaying an analysis signal based on the calculated anesthesia depth and facial nerve damage.

Preferably, the method further includes the step of confirming whether the alarm signal generation condition is to generate an alarm.

The step of connecting the probe means attaches an electrode to the eyelid and mouth muscles of the patient, and attaches the electrode to other muscles except the eyelid and mouth muscles of the facial muscles of the patient.

Reference data is measured after the signal has stabilized after the patient's mind and body have stabilized.

The anesthesia depth calculation and response signal analysis step is performed after receiving the reference data and confirming the patient's name, date, EMG channel connection status, anesthetic type and dose, and the like.

The displaying step shows the calculated depth of anesthesia in the form of a graph of a predetermined step.

As described above, according to the anesthesia depth and facial nerve monitoring device and method using the EMG signal according to the present invention, the anesthesia depth is relatively displayed using the EMG signal and the nerve data of the facial muscles are received before and after surgery. By determining the inoperable state in advance through the data of the warning has the effect of preventing accidents during surgery.

In addition, there is an effect that can be used as data by storing the data during the actual operation even after surgery.

1 is a schematic block diagram of an anesthetic depth and facial nerve monitoring device according to the present invention.
2 is a flowchart illustrating an example of a monitoring process of an anesthesia depth and facial nerve monitoring device according to the present invention.
3 is a diagram illustrating an example of a screen displayed on the monitor of FIG. 1.
4 is a diagram illustrating a pop-up window on a GUI screen for obtaining reference data in an anesthetic depth and facial nerve monitoring apparatus according to the present invention.
5 is a view showing a pop-up (pop-up) for inputting the dose of anesthetic on the screen of the anesthetic depth and facial nerve monitoring device according to the present invention.
6 is a diagram showing a confirmation pop-up of the final analysis step in the GUI screen of the anesthesia depth and facial nerve monitoring device according to the present invention.
7 is a view showing the lower items of the 'File' button on the GUI screen of the anesthesia depth and facial nerve monitoring device according to the present invention.
8 is a view showing the lower items of the 'Data' button on the GUI screen of the anesthesia depth and facial nerve monitoring device according to the present invention.
9 is a view showing the lower items of the 'Measure' button on the GUI screen of the anesthesia depth and facial nerve monitoring device according to the present invention.
10 is a view showing the lower items of the 'Option' button on the GUI screen of the anesthesia depth and facial nerve monitoring device according to the present invention.

The EMG signal (EMG signal, Electromyographic Signal, Myoelectric Signal, 筋 電 圖 信 筋, hereinafter referred to as EMG signal) in the present invention refers to an electrical signal generated along the muscle fibers from the muscle surface in accordance with the movement of the body.

Most EMG signals are less than 10mV and frequency ranges are less than 500Hz, which can be measured by plugging the needle directly into the muscle or by attaching an electrode to the skin surface near the muscle. When using EMG for the control of a computer or mobile device, the surface EMG method is used in consideration of practicality. Surface EMG is a method of measuring the EMG signal on the skin surface.

The facial nerve is the nerve that corresponds to the seventh cranial nerve out of the 12 pairs of peripheral nervous systems that come out of the brain. It is composed of kinetic fibers, and in the case of humans, the facial nerve is mainly responsible for facial expression. Facial nerve palsy caused by facial nerve disorders is common.

On the other hand, in order to determine the depth of anesthesia is measured by using the EMG signal before anesthesia and the EMG signal measured during surgery to determine whether the operation is possible. In addition, the facial nerve should be monitored in real time to prevent damage to the facial nerve exposed during otolaryngology surgery. Such anesthesia and facial nerve monitoring should not only be convenient for the user to operate during the operation, but also be valuable as a data to prepare for future medical suits with proper alarm and storage of data.

Hereinafter, an anesthetic depth and facial nerve monitoring apparatus and method using an EMG signal according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic block diagram of an anesthetic depth and facial nerve monitoring device according to the present invention.

Anesthetic depth and facial nerve monitoring device using the EMG signal according to the present invention, the stimulus signal generation and response signal receiving unit 70 for generating a stimulation signal and receiving a response signal; Probe means (P1, P2, P3, P4) connected to the patient's eye, mouth, and face surfaces to transmit stimulation signals and to transmit response signals from the connected eye, mouth, and face surfaces ; Anesthesia depth and facial nerve monitoring unit 40 calculates anesthesia depth based on the response signal received from the patient through probe means P1, P2, P3, and P4 and analyzes the response signal according to facial nerve damage in real time. ); Controls the stimulus signal generation and response signal receiving unit 70 and anesthesia depth and facial nerve monitoring unit 40, and displays the analysis signal according to the calculated anesthesia depth and facial nerve damage on the monitor 50 and the calculated anesthesia It includes; and the control unit 10 for storing the depth and facial nerve damage information in the data storage unit 60 in real time.

The probe means P5 is connected to the collarbone of the patient and serves as a ground.

The stimulus signal generation and response signal receiver 70 includes a facial nerve stimulation signal generation and response signal receiver 20 and a fine stimulation signal generation and response signal receiver 30.

The facial nerve stimulation signal generation and response signal receiver 20 provides a variable electrical stimulation according to the anesthesia depth to the orbicularis oculi muscle and orbicularis oris mucle of the patient through the invasive electrode. Receive a response signal. Invasive electrodes are attached to the orbicularis oculi muscle and the orbicularis oris mucle. The signal received by the facial nerve stimulation signal generation and response signal receiver 20 is used to determine whether the facial nerve of the patient is damaged.

The microstimulation signal generation and response signal receiver 30 receives a response signal by applying a microstimulation signal to other muscles except the orbicularis oculi muscle and the orbicularis oris mucle among the facial muscles of the patient. do. The fine stimulus signal generation and response signal receiver 30 uses surface electrodes. The signal received by the fine stimulus signal generation and response signal receiver 30 is used to determine the anesthetic depth of the patient.

The anesthesia depth and facial nerve monitoring unit 40 further includes an anesthesia depth calculator 42 for calculating anesthesia depth.

An anesthetic depth and facial nerve monitoring method using the EMG signal according to the present invention will be briefly described with reference to FIG. 2.

First, the electrode attaching process (S2) is a process of attaching an electrode (described above as a probe means) to the sensory organ of the patient. In the present invention, the electrode is attached to the face of the patient for data reception. At this time, the invasive electrode is attached to the orbicularis Oculi muscle (1ch) and the mouth muscle (orbicularis Oris muscle, 2ch). Then, the surface electrodes are attached to the 3 to 4ch electrodes using the surface electrodes outside the two muscles. Grounding is done to the clavicle. The surface EMG-attached muscle is given a periodic microstimulation signal, and the anesthesia depth using the response signal is analyzed. At the invasive electrode region, an electrical stimulation variable according to the depth of anesthesia is applied to the muscle to which the invasive electrode is attached to monitor nerve damage.

Thereafter, the anesthesia depth and facial nerve monitoring device using the EMG signal according to the present invention are operated (S4).

Thereafter, the reference data acquisition and storage step S6 is performed before anesthesia. In order to calculate the depth of anesthesia, acquiring a signal before anesthesia is essential. The anesthesia depth and facial nerve monitoring unit 40 measures and stores the reference data before anesthesia. Reference data are measured after the patient's mind and body have stabilized and after the signal has stabilized and last approximately 1 minute.

Thereafter, it is determined whether there is a confirmation signal for calculating anesthesia depth (S8). For example, the anesthesia depth and facial nerve monitoring unit 40 inputs the type and dose of the anesthetic when reference data is acquired, and finally the patient's name, date, EMG channel connection state, anesthetic type and dose, etc. A confirmation window appears. At this time, the depth of anesthesia is calculated by pressing OK. Here, the confirmation signal refers to a signal generated by pressing the confirmation button. In addition, although FIG. 1 does not show the key input means (for example, a keyboard) which can input various keys separately, it is understood that a key input means is provided naturally. Of course, the key input means may be in the form of a touch panel provided in the monitor instead of the general keyboard form.

If there is a confirmation signal, the anesthesia depth is calculated based on the EMG for the patient using the data during the actual operation, and the data of the facial nerve is obtained and stored in real time (S10). Here, anesthesia depth calculation is performed by the anesthesia depth calculation unit 42 provided in the anesthesia depth and facial nerve monitoring unit 40. The anesthesia depth calculation is calculated by comparing the reference data with the type and dose of the anesthetic. The calculated depth of anesthesia is shown in the form of a graph on the monitor (5). The control unit 10 performs the calculation of the anesthetic depth in the form of a graph. Preferably, the EMG signal is represented as a potential value with time, and the anesthesia depth is about 4 steps (relative index).

After that, it is determined whether the alarm signal generation condition (S12). That is, the control unit 10 can determine whether or not it is difficult to proceed with the operation for the patient according to the anesthesia depth and facial nerve monitoring results from the anesthesia depth and facial nerve monitoring unit 40. The alarm signal is generated when it is difficult to proceed with the operation on the patient.

If the set alarm signal generation condition, the control unit 10 generates an alarm signal (S14). For example, a voice message is output using an output device (for example, a speaker device) (not shown), and an alarm signal is displayed on the monitor 50 at the same time.

3 is a diagram illustrating an example of a screen displayed on the monitor of FIG. 1.

The 'Connect', 'Analysis' and 'Display' buttons on the right are used to monitor anesthetic depth and facial nerve during surgery. Press 'Connect' button to display Subject name and protocol connection method. If you enter the subject name, a folder with date and patient name is created in the working directory that is set automatically, and the data entered later is saved. This can be modified using the 'Data' button on the top. The protocol sets the position where the 4ch electrode attached to the patient is attached to the patient. It consists of 2ch of facial nerve and surface EMG.

 By pressing the 'Analyze' button, preparation for calculating anesthesia depth is performed. In order to calculate the depth of anesthesia, acquiring a signal before anesthesia is essential. Reference data is measured and stored. Reference data is measured after the patient's mind and body have stabilized and the signal lasts for about 1 minute. After the reference data is acquired, a window for inputting an anesthetic drug type and a dose and finally confirming the patient's name, date, EMG channel connection status, anesthetic type and dose, and the like appears. At this time, the depth of anesthesia is calculated by pressing OK. This can be modified using the 'Measure' button on the top.

Next, the 'Display' button sets the data and beeps that are drawn in the Graph window. The data shown in the graph window is represented by the potential value (μV) over time for the EMG signal, and the anesthesia depth is about 4 steps (relative index).

4 is a diagram illustrating a pop-up window on a GUI screen for obtaining reference data in an anesthetic depth and facial nerve monitoring apparatus according to the present invention.

A red light in the Ready area in the middle right indicates that the patient's signal is unstable and needs to wait for stability. The blue light indicates that the signal is stable, so press the Start button to collect the data. In the center, a signal appears, and the numbers 1, 2, 3, and 4 at the bottom mean ch of connected EMG, and Nerve / EMG means facial nerve and EMG signal. Can be.

5 is a view showing a pop-up (pop-up) for inputting the dose of anesthetic on the screen of the anesthetic depth and facial nerve monitoring device according to the present invention. Referring to Figure 5, the amount of anesthetics injected into the patient can be confirmed, or can be directly entered, when pressing the confirm button (confirm) anesthesia depth is calculated.

6 is a diagram showing a confirmation pop-up of the final analysis step in the GUI screen of the anesthesia depth and facial nerve monitoring device according to the present invention. Referring to FIG. 6, it is possible to see a screen showing the patient's image and probe means (electrode) connection state and the amount of anesthetics injected for the calculation of the actual anesthetic depth.

7 is a view showing the lower items of the "File" button on the GUI screen of the anesthesia depth and facial nerve monitoring apparatus according to the present invention, Figure 8 is a "Data" in the GUI screen of the anesthesia depth and facial nerve monitoring apparatus according to the present invention "Is a view showing the lower item of the button, Figure 9 is a view showing the lower item of the" Measure "button in the GUI screen of the anesthesia depth and facial nerve monitoring apparatus according to the present invention, Figure 10 is an anesthetic depth and The lower item of the "Option" button in the GUI screen of the facial nerve monitoring apparatus.

If you select the "File" button, a pop-up window will appear where you can perform the following functions: Users, Working Directory, Import / Export, Open, Save / Save as, and Exit. If you select the "Data" button, a pop-up window will appear where you can perform the Subject and Protocol functions. If you select the "Measure" button, a pop-up window will appear for you to perform Reference, Anesthesia, and overview functions. Selecting the "Options" button brings up a pop-up window that performs the settings function as a sub item.

10: control unit
20: facial nerve stimulation signal generation and response signal receiving unit
30: micro stimulation signal generation and response signal receiving unit
40: Anesthesia depth and facial nerve monitoring unit
50: monitor
60: data storage
70: stimulus signal generation and response signal receiving unit
P1, P2, P3, P4, P5: probe means (electrode)

Claims (14)

A stimulus signal generation and response signal receiver for generating a stimulus signal and receiving a response signal;
Probe means connected to a muscle of a patient to transmit the stimulus signal and a response signal from a sensory organ of the patient;
Anesthesia depth and facial nerve monitoring unit for calculating anesthesia depth based on the response signal from the patient through the probe means and analyzing the response signal according to facial nerve damage; And
Anesthesia depth and facial nerve monitoring device using the EMG signal, characterized in that it comprises a control unit for displaying and storing the analysis signal according to the calculated anesthesia depth and facial nerve damage. The method of claim 1,
The probe means includes an electrode attached to the eyelid and mouth muscles of the patient, and an electrode attached to other muscles except the eyelid and mouth muscles in the facial muscles of the patient. Anesthesia depth and facial nerve monitoring device using. The method of claim 2,
The stimulus signal generation and response signal receiving unit
Facial nerve stimulation signal generation and response signal receiving unit for receiving a response signal through the electrodes attached to the patient's eye muscles and mouth muscles to determine whether the patient's facial nerve damage; And
In order to determine the depth of anesthesia of the patient comprises a fine stimulation signal generation and response signal receiving unit for receiving a response signal through the electrode attached to the muscles other than the eye muscles and mouth around the muscles of the patient; Anesthesia depth and facial nerve monitoring device using EMG signal. The method of claim 1,
The anesthesia depth and facial nerve monitoring unit anesthesia depth and facial nerve monitoring device using the EMG signal, characterized in that after calculating the anesthetic depth after obtaining the reference data after the mind and body of the patient is stabilized. The method of claim 4, wherein
The anesthesia depth and facial nerve monitoring unit
Anesthetic depth and facial nerve monitoring device using an EMG signal, characterized in that the anesthetic depth is calculated by comparing the reference data with the type and dose of the anesthetic drug for the patient. The method of claim 1,
The control unit is anesthesia depth and facial nerve monitoring device using the EMG signal, characterized in that to display the calculated anesthesia depth in the form of a graph. The method of claim 1,
The control unit is anesthesia depth and facial nerve monitoring device using the EMG signal, characterized in that for generating an alarm when the operation of the anesthesia depth calculation result. The method of claim 1,
The control unit is anesthesia depth and facial nerve monitoring device using the EMG signal, characterized in that for managing the stored analytical signal according to the anesthetic depth and facial nerve damage calculated by each patient. Connecting the probe means to the muscle of the patient;
Receiving reference data from the patient prior to anesthesia via the probe means;
After receiving the reference data, calculating anesthesia depth based on the response signal from the patient through the probe means, and analyzing the response signal according to facial nerve damage; And
Anesthesia depth and facial nerve monitoring method using an EMG signal comprising the step of displaying on the monitor the analysis signal according to the calculated anesthesia depth and facial nerve damage. The method of claim 9,
Anesthetic depth and facial nerve monitoring method using an EMG signal, characterized in that it further comprises the step of performing an alarm to determine whether the alarm signal generation conditions. The method of claim 9,
The step of connecting the probe means is an EMG signal, characterized in that to attach the electrode to the muscles of the patient's eye and around the mouth, and the muscles other than the eyelid and mouth around the muscles of the patient Anesthesia depth and facial nerve monitoring method. The method of claim 9,
The reference data is anesthesia and facial nerve monitoring method using an EMG signal, characterized in that after the signal is stabilized after the mind and body of the patient is stabilized. The method of claim 9,
The anesthesia depth calculation and response signal analysis step is performed after the reference data is received according to the patient's name, date, EMG channel connection status, anesthetic type and dose, etc. Depth and facial nerve monitoring method. The method of claim 9,
In the displaying step, the anesthesia depth and facial nerve monitoring method using an EMG signal, characterized in that the calculated anesthesia depth in the form of a graph of a predetermined step.

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