JPH0551299B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a high-frequency ablation device, and particularly to its operation check function.

[Background Art] In recent years, in the medical and processing fields, high-frequency cauterization devices, which burn off objects by passing high-frequency current through them, have been frequently used, so-called electric scalpel devices. Here, the high frequency current is set to an optimum value depending on the object by an output adjustment switch or the like. However, it is unclear whether the setting value of the output setting switch and the actual output value completely match. Particularly in the medical field, if the high frequency current is too high, it poses a danger to the human body, so it is necessary to check before surgery whether the high frequency output is correctly output according to the set value. Generally, a high-frequency ablation device consists of a high-frequency power source, a treatment tool (active electrode) such as a wire made of stainless steel or the like connected to the high-frequency power source, and an electrode plate (passive electrode) that is attached to a patient. Then, a high-frequency current flows through the human body between the tip of the treatment tool and the electrode plate, thereby cauterizing the patient. A conventional method for checking high frequency output is to use an incandescent light bulb, voltmeter, etc. that displays the high frequency output flowing between an active electrode terminal and a passive electrode terminal, as described in Japanese Patent Application Laid-Open No. 58-94845. The display means is provided so as to be connectable by a connecting means such as a switch, and when checking, the connecting means is turned on and a high frequency current is caused to flow through the display means, thereby causing the display means to display according to the high frequency output. be.

[Problems to be Solved by the Invention] However, in this prior art, the display means merely displays the high frequency current, and the setting value of the output setting switch and the actual high frequency current value do not completely match. I don't know if there are or not. moreover,
Since the display means does not have a load corresponding to the object during actual treatment, it does not display the current value flowing through the object during actual treatment. Therefore, from this display, it is not known in advance whether or not the high-frequency current according to the setting value of the output adjustment switch will flow to the object during treatment.

This invention was made with a focus on these problems, and it is a high-frequency device that can easily, safely, and accurately check whether or not the high-frequency current according to the set value can be obtained during treatment before treatment. Its purpose is to provide an ablation device.

[Means for Solving the Problems] The radiofrequency ablation device according to the present invention includes a pseudo load that is provided in the radiofrequency ablation device main body and has a load corresponding to the load of the current path including the object during ablation, and a predetermined A high frequency output means for outputting a set high frequency signal to a dummy load, a means for connecting the high frequency output means to the dummy load for checking, a means for detecting a current flowing through the dummy load, and a detection value of the detection means and a high frequency and means for comparing the set value of the output means.

[Function] In this device, in the output check mode, the high frequency output means is connected to a pseudo load equivalent to the object, a predetermined high frequency signal is sent to the pseudo load, and the means for detecting the current flowing through the pseudo load is detected. By comparing the value with the setting value of the high frequency output means,
It is possible to check in advance whether high frequency output according to the set value is generated during treatment.

[Embodiment] An embodiment of the high-frequency ablation device according to the present invention will be described below with reference to the drawings. FIG. 1 is a front view of the operation panel of the high-frequency ablation device of the first embodiment, and FIG. 2 is a circuit diagram of the first embodiment. A power switch 10 is provided at the bottom left end of the operation panel shown in FIG. 1, and a group of terminals is provided to the right of the power switch 10. The terminal group includes a check lead terminal 11 to which one end of the check lead 54 (FIG. 2) is connected during an output check, a terminal 12 to which a bipolar electrode plug is connected, a terminal 13 to which a female holder plug with a hand switch is connected, and a cautery terminal. An active terminal 14, an S-P cord or a P cord (patient electrode), to which an active cord plug, which is sometimes connected to a treatment instrument, is connected, and the other end of the check lead 54 is connected during an output check.
It consists of a 4-pin patient terminal 15 to which is connected. The upper half of the operation panel is provided with a group of operation switches and a group of indicators. The operation switch group includes a mode changeover switch 16 that selects either incision or mixing mode, an output adjustment switch 17 that adjusts the output of incision or mixing, and a fixed switch that fixes the operation switch so that it does not accept the operation of the operation switch group. It consists of a switch 19 and an output adjustment switch 20 for adjusting the output of coagulation. The display group includes mode display lamps 21, 22, and 24 that indicate the output status of the incision, mixing, and coagulation modes, a numerical display section 23 that displays the setting values for the cutting or mixing mode, and a numerical display section 23 that displays the setting values for the coagulation mode. It consists of a numerical display section 25 for displaying, a connection monitor 26 for displaying check results, and an output check display section 27.

FIG. 2 is a circuit diagram of the first embodiment. This circuit diagram shows only the parts necessary for the high frequency current output check function related to the present application, and parts unrelated to this are omitted. As terminals, only the check lead terminal 11, the active terminal 14, and the patient terminals 15a and 15b to which the P cords are connected are shown. When checking output, check lead terminal 1
A check lead 54 is connected to the active terminal 14 and the active terminal 14. This circuit has a power amplifying section 30 as a high frequency current source, and this output current is transmitted to a high frequency transformer 3.
2 to the active terminal 14, patient terminals 15a, 15
b, supplied to the check lead terminal 11; The output current value of the power amplification section 30 can be controlled by the control section 48. Capacitors 34, 36, and 38 are connected between the high frequency transformer 32, the active terminal 14, and the patient terminals 15a, 15b. The check lead terminal 11 has a mode detecting section 40, a discriminating section 42,
It is connected to the high frequency transformer 32 via a pseudo load 44 and a capacitor 46.

The dummy load 44 is connected to the active terminal 1 during normal ablation operation.
The load is assumed to be equal to the load of the current path of the current flowing from No. 4 to the patient terminals 15a and 15b via the treatment instrument, the human body, and the patient electrode plate. Therefore, a current that is assumed to be equal to the current that actually flows through the human body flows through the pseudo load 44 for each set value of the power amplification section 30 .

Signals from the mode detection section 40 and the discrimination section 42 are supplied to the control section 48. The control section 48 controls the power amplification section 30 and the display section 50, which consists of a group of various indicators on the operation panel shown in FIG. Foot switch 5 that provides operation timing during radiofrequency ablation
The signal from 2 is supplied to the control section 48.

FIG. 3 shows a specific example of the mode detection section 40. This detects the insertion of the check lead 54 into the check lead terminal 11 and detects that the output check mode has been designated. It is confirmed that the output check mode has been specified by turning on the micro switch 40 as shown in FIG. can be detected. Although not shown in FIG. 2, similar P-code insertion detectors are also connected to the patient terminals 15a and 15b.

FIG. 4 shows a specific example of the determining section 42. this is,
The current flowing through the pseudo load 44 is detected, and it is determined whether a predetermined high frequency current according to a set value is flowing. A current sensor consisting of a coil 60, a resistor 62, a diode 64, a capacitor 66, and a resistor 68 detects the current flowing through the pseudo load 44, and determines whether the high-frequency output operation is normal or abnormal according to the voltage E _p applied to the resistor 68. can.

The operation of the first embodiment will be explained with reference to the flowchart of FIG. When the operation starts, the step
As shown in S2, it is determined whether the check lead 54 is inserted into the check lead terminal 11 for output checking. Step S2 is executed until insertion of the check lead 54 is detected.
When insertion is detected, it is determined in step S4 whether the patient electrode (P plate) is connected to the patient terminals 15a, 15b. This is because the contents of the output check include the connection of the P code. If connection of the P plate is not detected, a warning is generated in step S6, and step S4 is executed until connection is detected.

When a connection is detected, it is determined in step S8 whether the fitting switch 52 is on, and the step S8 is performed.
S8 is executed until the foot switch 52 is turned on. When it is detected that the foot switch 52 is turned on, the power amplifier 30 is controlled to output the high frequency current of "CUT3" for one second as shown in step S10. The output of "CUT3" is one of the output values that can be set for the radiofrequency ablation device, and the output value can be set in steps of 1 from "CUT1" (minimum level) to "CUT10" (maximum level). . The high frequency current output from the power amplification section 30 flows from the high frequency transformer 32 via the capacitor 34, check lead 54, mode detection section 40, discrimination section 42, pseudo load 44, and capacitor 46.

Next, in step S12, the control section 48
Based on the determination result of the determination unit 42 that detects the current flowing through the pseudo load 44, it is determined whether the high frequency current corresponding to the set value "CUT3" has reliably flowed through the pseudo load 44. If it is detected that a predetermined current flows through the pseudo load 44, as shown in step S14, the output check display section 27 of the operation panel changes to "normal".
Display for seconds. If the predetermined current does not flow through the pseudo load 44 (including when the current value is high or low), "Abnormal" is displayed on the output check display section 27 of the operation panel for 5 seconds as shown in step S16. This state is shown in FIG. As shown in figure a, the foot switch 52 is turned on and the output signal is
When the low level is reached, "CUT3" is output for 1 second as shown in FIG. This display allows you to identify whether the high frequency output is correctly output according to the set value.

After this, it is determined in step S18 whether the check operation is finished, and if it is not finished, the flow returns to step S8, and otherwise it is finished.

As explained above, according to the first embodiment, the pseudo load 44 having the same load as that during cauterization is provided in the main body of the apparatus, and the check lead terminal 11 and the active terminal 1
By connecting 4 with a check lead 54, the pseudo load 44 is connected to the power amplifier 3 which is a high frequency current source.
0, a current equivalent to that during cauterization can be passed, and the high frequency output can be checked easily and accurately. In addition, since the check operation is started only when the patient electrode is connected, and the output is performed according to the signal from the foot switch 52, it is possible to check not only the set value but also the connection state of the patient electrode. Since the connection state of the foot switch 52 can also be determined, it is also possible to check the entire system.

In the first embodiment, the pseudo load 44 is connected to the power amplifier section 30 by connecting the check lead 54 between the check lead terminal 11 and the active terminal 14, but this connection is not limited to this. Although not shown, there is also a second embodiment in which a switch is connected between the check lead terminal 11 and the active terminal 14, and the check lead terminal 11 and the active terminal 14 are electrically connected/disconnected by turning on/off the switch. .

Note that this invention is not limited to the above-described embodiments and can be modified in various ways. For example, the output check was performed only for a specific setting value "CUT3", but
The setting values may be sequentially varied and the process may be performed for all setting values. Furthermore, the cauterization device is not limited to medical use, but may be industrial use.

[Effects of the Invention] As described above, according to the present invention, it is possible to provide a high-frequency ablation device that can easily and accurately check the high-frequency output.

[Brief explanation of the drawing]

FIG. 1 shows a first diagram of a high-frequency ablation device according to the present invention.
A front view of the operation panel of the embodiment, FIG. 2 is a circuit diagram of the first embodiment, FIGS. 3 a and b are diagrams showing a specific example of the mode detection section in FIG. 2, and FIG. FIG. 5 is a flowchart showing the operation of the first embodiment, and FIGS. 6a and 6b are timing charts showing the operation of the first embodiment. 11...Check lead terminal, 14...Active terminal, 15a, 15b...Patient terminal, 30...Power amplifier section, 32...High frequency transformer, 40...Mode detection section, 42...Discrimination section, 44... pseudo load,
48...control unit, 50...display unit, 52...foot switch.

Claims (1)

[Claims] 1 A pseudo load that is provided in the main body of the radiofrequency ablation device and has a load corresponding to the load of the current path including the object during ablation, and a high frequency signal set to a predetermined value is output to the pseudo load for a set time only. a high-frequency output control section for starting the high-frequency output, a foot switch for starting output of the high-frequency output, a check lead for connecting the pseudo load to high-frequency output means for outputting high-frequency output for high-frequency output checking, and detecting the current flowing in the pseudo load. and display means for comparing the detection value of the detection means and a predetermined value of the high-frequency output and displaying the result of the output check on the front panel of the apparatus. Device.