JP2002360603A - Galvanosurgery device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a galvanosurgery device capable of determining a coagulation state of a tissue of a wide range. SOLUTION: A tissue state detecting and incising electrode 12 is arranged in the vicinity between a coagulating electrode 11 and a feedback electrode 13 on the tip of a treating tool 5. A coagulating treatment by high frequency current-carrying is performed at proper time by using the coagulating electrode 11 and the feedback electrode 13. Afterwards, the coagulating electrode 11 is switched to the tissue state detecting and incising electrode 12, and impedance of the tissue between the electrodes is detected, and is compared with a threshold value being a standard for a coagulation completed state to determine whether or not coagulation is completed so that the coagulation state can be determined over a wider range than when determining whether or not the coagulation is completed by using the coagulating electrode 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrosurgical apparatus for detecting a state of a tissue and changing an output to electrically perform a surgical operation.

[0002]

2. Description of the Related Art Generally, an electrosurgical device such as an electric scalpel is
In surgery or medical surgery, incision and coagulation of living tissue,
It is used when performing treatment such as hemostasis. Such an electrosurgical apparatus is provided with a high-frequency ablation power source and a treatment tool connected to the high-frequency ablation power source. The high-frequency ablation power source is supplied from the high-frequency ablation power source by bringing the treatment tool into contact with a patient. Take action.

[0003] Various types of electrosurgical devices have been proposed in the past. For example, Japanese Patent Application Laid-Open No. Hei 8-98845 discloses a method for solidifying a tissue, preventing carbonization of the coagulated tissue, and applying the electrode to the tissue. There is disclosed a technique for determining the end of coagulation based on tissue impedance and stopping high-frequency output in order to prevent the adhesion of the particles.

When a high-frequency current is applied to a living tissue, FIG.
As shown at 0, the tissue impedance during protein denaturation
It takes a low value and rises sharply when protein denaturation ends and tissue begins to dry. When protein denaturation is completed, coagulation may be determined to be completed. In Japanese Patent Application Laid-Open No. 8-98845, this rapid increase in tissue impedance is detected.
The high frequency output is stopped.

[0005]

When a high-frequency current is continuously supplied to the living tissue from the treatment electrode, protein denaturation of the living tissue spreads from the contact surface between the treatment electrode and the tissue to the surrounding tissue. The tissue impedance rises sharply when the protein denaturation of the tissue around the treatment electrode ends. Thereafter, when it is desired to coagulate a wider range of tissue, the coagulation state cannot be determined based on the tissue impedance obtained from the treatment electrode.

(Object of the Invention) The present invention has been made in view of the above points, and has as its object to provide an electrosurgical apparatus capable of judging the coagulation state of a wider range of tissue.

[0007]

According to the electrosurgical apparatus of the present invention, there is provided a high-frequency current generating means for generating a high-frequency current for treatment, and at least one means for supplying the high-frequency current for treatment to a treatment target portion of a tissue. Two treatment electrodes, a detection current generating means for generating a detection current for detecting a physical state of the tissue, and a treatment target site of the tissue which is brought into contact with the treatment electrode at a position different from that of the treatment electrode. A detection current supply electrode that supplies a current to the treatment target site of the tissue, a measurement unit that measures the detection current supplied from the detection supply electrode to the treatment target site of the tissue, and a measurement result obtained by the measurement unit. A determination means for determining a physical state of a treatment target site of the tissue based on the detection current supply electrode that has come into contact with the tissue at a site different from the treatment electrode. By detecting the physical state of the more organized, compared with the case of detecting a physical state of the tissue from the treatment electrode, so that it becomes possible to determine more or solidification of a wide range of tissues is completed.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. (First Embodiment) FIGS. 1 to 7 relate to a first embodiment of the present invention, FIG. 1 shows a configuration of a high-frequency ablation device of the first embodiment, and FIGS. 4 shows the configuration of the high-frequency ablation power source, FIG. 5 shows a flow chart of the control process by the control circuit of FIG. 4, and FIG. 6 shows the short-circuit and non-short-circuit of the high-frequency ablation power device. FIG. 7 shows an explanatory diagram of an output waveform and the like of a treatment current and the like by the high-frequency ablation power supply device.

As shown in FIG. 1, a high-frequency ablation power supply 2 for supplying high-frequency ablation power is provided in a high-frequency ablation power supply 1 for supplying a high-frequency ablation power as an electrosurgical apparatus according to a first embodiment of the present invention. A treatment tool 5 for performing high-frequency ablation treatment is connected to 2 via a cable 4 connected to the connector section 3. The treatment tool 5 allows the patient 7 placed on the bed 6 to be subjected to a treatment by high-frequency ablation.

Further, a foot switch 8 for outputting a high-frequency ablation current (current for treatment) from the high-frequency ablation power supply 2 to the treatment instrument 5 is connected to the high-frequency ablation power supply 2. The foot switch 8 is provided with an incision pedal 9a for incision output and a coagulation pedal 9b for coagulation output.

As shown in FIG. 2, a treatment instrument 5 has a coagulation electrode 11, a tissue state detecting and incising electrode 12 and a return electrode 1 for recovering the current of these electrodes 11, 12 at its distal end.
3 are provided. FIG. 3 shows a cross-sectional shape viewed from the distal end side at a position indicated by a two-dot chain line in FIG.
Shows a state in which the treatment is performed by contacting the affected tissue 7a of the patient 7).

As shown in FIG. 3, the tissue state detecting / dissecting electrode 9 is arranged at a site different from the coagulation electrode 11 so as to come into contact with a target tissue such as the diseased tissue 7a (assuming that a treatment is to be performed). ing. In the specific example of FIG. 2 or FIG. 3, between the coagulation electrodes 11 bent in a horseshoe shape, an electrode 9 for tissue state detection and incision is arranged near the center thereof.

By providing the tissue state detecting and incising electrode 9 so as to come into contact with the target tissue at a site different from the coagulation electrode 11 as described above, the coagulation electrode 11 can coagulate the target tissue more widely. It is characterized by being able to detect the coagulation state.

As shown in FIG. 4, the high-frequency ablation power supply 2 includes a power supply circuit 21 for supplying a DC current, a high-frequency generation circuit 22 for converting the DC current from the power supply circuit 21 to a high-frequency current, A waveform circuit 23 for instructing a waveform of a high-frequency current to the circuit 22;
An output transformer 24 for outputting the high-frequency current from the device 2 to the treatment tool 5, a switching circuit 25 for switching the output of the output transformer 24 to be connected to either the coagulation electrode 11 or the tissue state detection and incision electrode 12, A current sensor 26 for detecting an output current output from the output transformer 24, a voltage sensor 27 for detecting an output voltage output from the output transformer 24, and an A for converting signals of the current sensor 26 and the voltage sensor 27 into digital signals. A / D converter 28 and A /
The power supply circuit 21, the waveform circuit 23, and the switching circuit 25 based on the digitized data from the D converter 28.
And a control circuit 29 for controlling the

The treatment instrument 5 is connected to the high-frequency ablation power supply 2 by the connector 3 through signal lines 4a to 4c constituting the cable 4. In this case, the signal lines 4a and 4b connected to the tissue state detecting and incision electrode 12 and the coagulation electrode 11 are connected to the terminals 3a and 3b connected to the switching circuit 25, respectively, and are connected to the feedback electrode 13. Signal line 4c
Is connected to the terminal 3c. Then, the control circuit 29 controls switching of the switching circuit 25, and outputs the signal line 4a or the signal line 4
Select b. Then, the treatment current or the detection bulb supplied from the output transformer 24 through the selected signal line 4a or 4b can be supplied to the coagulation electrode 11 or the tissue state detecting / dissecting electrode 12.

The control circuit 29 compares the electrical characteristics of the living tissue detected (measured) using the tissue state detecting and incising electrode 9, specifically, the impedance value, with a preset reference value. Thus, it is determined whether or not a solidification state has occurred. Further, the foot switch 8 is connected to the control circuit 29, and the control circuit 29 detects an operation on the incision pedal 9a or the coagulation pedal 9b of the foot switch 8, and performs a corresponding control operation.

In the present embodiment, the tissue state detecting and incising electrode 9 is provided at a position different from the coagulation electrode 11 provided at the distal end of the treatment instrument 5 as described above, and the coagulation electrode 11 coagulates the target tissue. When the procedure is performed, the physical property of the target tissue is electrically detected using the tissue state detection and incision electrode 9 to detect a wider range of coagulation state than when the coagulation electrode 11 detects the physical property. It is characterized by being able to do it.

The operation of the embodiment constructed as described above will be described. FIG. 5 is a flowchart showing the control operation by the control circuit 29. In step S1 of FIG. 5, the control circuit 29 waits until the coagulation pedal 9b is depressed. When the coagulation pedal 9b is depressed, the control circuit 2 is turned on in step S2.
9 controls the switching operation of the switching circuit 25 so that the output of the output transformer 24 is connected to the coagulation electrode 11 (the signal line 4a in FIG. 4 is selected).

In the next step S3, a power lower than the set output, for example, 1 W, is applied to the coagulation electrode 11 and the return electrode 13
The control circuit 29 controls the output of the power supply circuit 21 so that the high-frequency power output from the high-frequency generation circuit 22 to the output transformer 24 can be reduced to, for example, 1 W by adding the output of the power supply circuit 21. ).

In the next step S4, the current sensor 2
6. The current value and the voltage value from the voltage sensor 27 are taken into the control circuit 29, and the voltage value is divided by the current value to calculate the impedance Z between both electrodes.

In the next step S5, a predetermined reference impedance value (or threshold value), for example, 10Ω, is compared with the impedance Z between both electrodes. For example, the impedance Z between both electrodes is a value 1 as a reference impedance value.
It is compared with 0Ω to determine whether it is larger than 10Ω.
This reference impedance value is set to an upper limit value of the impedance value corresponding to a state in which both electrodes are not connected via tissue but are in contact with each other without passing through tissue.

The impedance Z between the two electrodes is
If it is 10Ω or less, the process proceeds to step S6, in which it is determined that the coagulation electrode 11 and the return electrode 13 are short-circuited, and a short-circuit warning is issued to prevent destruction of both electrodes.
Then, in the next step S7, it is determined whether or not the coagulation pedal 9b has been turned off, and a short-circuit warning is issued until the coagulation pedal 9b is turned off. When the coagulation pedal 9b is turned off, this processing is terminated, and No high frequency output is performed.

FIG. 6A shows how the output power and the impedance (also referred to as tissue impedance) between the two electrodes change at this time. That is, when the coagulation pedal 9b is depressed, a small amount of electric power is supplied. If the short-circuit is detected by the electric power and the detected impedance is determined to be a short circuit of 10Ω or less, the power is not output after that time. I do.

Returning to FIG. 5, if the impedance Z1 between the two electrodes is larger than 10Ω in the judgment of step S5,
In step S8, the coagulation setting output as set is output to the coagulation electrode 11.
And the return electrode 13 for a predetermined time.

That is, if the impedance Z between the two electrodes is larger than 10Ω as shown in FIG. 6B, it is determined that a short circuit has not occurred, and the coagulation setting output is permitted. Then, in step S8, the coagulation setting output is added between the coagulation electrode 11 and the return electrode 13 for a predetermined time to perform coagulation treatment.

Thereafter, in the next step S9, the control circuit 2
9 controls the switching operation of the switching circuit 25,
The output 4 is applied to the tissue state detecting / dissecting electrode 12 (abbreviated as a detecting electrode in FIG. 5 for simplicity). That is, the output transformer 24 controls the switching of the switching circuit 25 so that the coagulation electrode 11 and the return electrode 13 are connected to the tissue state detection / dissection electrode 12 and the return electrode 13 are connected. I do.

Then, in the next step S10, a predetermined detection power, for example, 1 W (power) and the frequency becomes 3
The control circuit 29 controls the high-frequency power so that it is applied at 50 kHz between the tissue state detection and incision electrode 12 and the feedback electrode 13. The power for detection is about 1 W, whereas the power for treatment is 30 to 40 W.

In the next step S11, the control circuit 29 takes in the output signals from the current sensor 26 and the voltage sensor 27, and calculates the impedance Z between both electrodes as in the case of step S4. Then, a reference impedance value (or threshold value) predetermined in step S12, for example,
Compare with 1 kΩ. For example, it is determined whether the impedance Z between both electrodes is greater than 1 kΩ.

The resulting impedance Z between both electrodes is
A value indicating the coagulation state of the tissue around the tissue state detecting / dissecting electrode 12. Even if the tissue surrounding the coagulating electrode 11 is undergoing protein denaturation, the tissue around the tissue state detecting / dissecting electrode 12 is not affected by the protein. If no metamorphosis occurs, take a low value.

If the impedance Z between the two electrodes is smaller than the reference impedance value, specifically, 1 kΩ, the process returns to step S2, where the determination of a short circuit and the coagulation output are performed again. Thus, the coagulation output is repeatedly performed until the coagulation of the tissue around the tissue state detecting / dissecting electrode 12 is completed. If the impedance between the two electrodes is larger than 1 kΩ, it is determined that coagulation of the tissue around the tissue state detecting / dissecting electrode 12 has been completed, and the process proceeds to step S13.

FIG. 7 shows changes in the treatment current (coagulation output current), the detection current, and the tissue impedance Z at this time. In step S5, it is determined that there is no short circuit. In step S8, a treatment current for performing a coagulation treatment for a predetermined time (from time t0 to t1 in FIG. 7) is supplied, and thereafter, a short time (from time t1 in FIG. 7). t2) The switching circuit 25 is switched to the tissue state detecting / dissecting electrode 12 side, and a current for detection is supplied to detect the tissue impedance Z.

If the tissue impedance Z is smaller than the threshold value, that is, 1 kΩ, the treatment current is supplied again, for example, from the time t2 to the time t3 (in this case, the coagulation electrode 11 is selected by the switching circuit 25). ).
Thereafter, similarly to the case from time t1 to t2, the switching circuit 25 is switched to the tissue state detecting / dissecting electrode 12 for a short time from time t3 to t4, and a current for detection is supplied to the tissue impedance Z. Is detected.

Then, the tissue impedance Z is 1 k
If it is larger than Ω, it is determined that coagulation of the tissue around the tissue state detecting and incision electrode 12 has been completed, and this coagulation treatment is terminated, and the process proceeds to step S13. In step S13, the control circuit 29 determines whether the coagulation pedal 9b is released (OFF) and the incision pedal 9a is depressed (ON), and waits until the coagulation pedal 9b is turned off and the incision pedal 9a is turned on. . When this state is reached, the process proceeds to step S14.

In step S14, an incision output according to the setting is applied between the tissue state detection and incision electrode 12 and the return electrode 13. Then, in step S15, the incision pedal 9a
It is determined whether or not has been released, and if it has not been released, the process returns to step S14 to maintain the state where the incision output is applied. On the other hand, when the incision pedal 9a is released, the incision output is stopped and the operation of the coagulation and incision procedure is terminated.

The time for the coagulation output may be a predetermined constant value.
Alternatively, it may be determined based on the impedance between the second electrode 2 and the feedback electrode 13.

This embodiment has the following effects. As described above, in the embodiment of the present invention, the tissue state detecting / dissecting electrode 12 for judging the coagulation state of the tissue is brought into contact with the tissue at a site different from the coagulation electrode 11 for performing the coagulation treatment. It is possible to determine whether coagulation of a wider range of tissue has been completed, as compared with the case where the determination is made from the tissue impedance obtained by the above.

Therefore, the coagulation treatment can be performed on a wide range of tissues more quickly than when coagulation is judged by the coagulation electrode 11, and the treatment can be completed in a short time (as in the conventional example). When coagulation is determined by the coagulation electrode 11, it is necessary to perform the treatment while changing the position of the coagulation electrode 11 little by little, and the treatment takes time.)

The coagulation pedal 9b of the foot switch 8
Since the coagulation output is not stopped until is released, there is no need to step on the foot switch 8 when it is desired to perform coagulation stronger than the coagulation determined to be appropriate, and the operability is good.

Although FIG. 3 shows an example in which the tissue state detecting and incising electrode 9 is arranged near the center between the horseshoe-shaped coagulation electrodes 11, the present invention is not limited to this. For example, the tissue state detecting and incision electrode 9 may be arranged near the center between the coagulation electrode 11 and the return electrode 12 in FIG.

The tissue state detecting / dissecting electrode 9
So that the tip side of the
When the tips of the coagulation electrode 11 and the return electrode 12 are brought into contact with the tissue to be treated when the tissue portion to be treated is not planar,
The tip of the tissue state detecting / dissecting electrode 9 between them may also be made to be able to contact the treatment target tissue.

The coagulation electrode 1 on the distal end is opened and closed by opening and closing the handle of the operating section (grip) on the proximal side of the treatment instrument 5.
The first electrode 1 and the return electrode 12 may be opened and closed in opposite directions with respect to the central tissue state detection and incision electrode 9.

The tissue state detecting and incising electrode 9 is arranged at a central position between the coagulation electrode 11 and the return electrode 12, so that the distance between the coagulation electrode 11 and the return electrode 12 can be changed. In this case, the value of the reference impedance value in step S12 in FIG. 5 may be changed and set.

(Second Embodiment) Next, a second embodiment of the present invention will be described with reference to FIGS. FIG. 8 shows the configuration of the high-frequency ablation power supply device according to the second embodiment, and FIG. 9 is an explanatory diagram of the operation of the high-frequency ablation power supply device of FIG. Since the second embodiment is almost the same as the first embodiment, only different points will be described, and the same components will be denoted by the same reference numerals and description thereof will be omitted.

In the high-frequency ablation power supply 2 according to the second embodiment shown in FIG. 8, the output is measured only by the current sensor 26 that measures the high-frequency current output from the output transformer 24.

Then, instead of comparing the impedance Z between the electrodes (tissue) in the first embodiment with a predetermined impedance value, the detected (measured) electrode Z (tissue) is used.
By comparing the current with a predetermined current value, it is determined whether or not a short-circuit state corresponds to step S5 in FIG. 5 and whether or not a solidification completion state corresponds to step S12 in FIG. To do.

Next, the operation of the present embodiment will be described. FIG.
As described with reference to FIG. 0, as the coagulation of the tissue progresses, the tissue impedance changes accordingly. As the tissue impedance increases, the high-frequency current decreases, so that the value of the high-frequency current exhibits a behavior opposite to the value of the tissue impedance as shown in FIG. In the present embodiment, the above properties are used.

In step S5 of FIG. 5 in the first embodiment, instead of measuring the impedance Z between the coagulation electrode 11 and the return electrode 13, in the present embodiment, the current flowing between both electrodes is measured. If the value exceeds a predetermined value, a warning is issued in step S6. If the measured current value is smaller than a predetermined value (for example, 10 mA), the process proceeds to step S8 in FIG. 5, and coagulation and output are performed as in the first embodiment.

After the set time, step S
As shown in FIG. 9, the switching circuit 25 switches from the coagulation electrode 11 to the tissue state detection and incision electrode 12 side, and the current detected by the current sensor 26 (the current flowing between both electrodes) is calculated by the detection power in that case. And step S12
In (determination processing corresponding to), the current value is compared with a predetermined reference current value (threshold).

If the measured current value is larger than the predetermined threshold value, the process returns to step S2 to perform the coagulation
The output is continued, and if the measured current value is smaller than a predetermined threshold, the process proceeds to step S13.

FIG. 9 shows changes in the treatment current (coagulation output current) and the detection current at this time. FIG. 9 compares the measured value of the detected current with the threshold value (from time t1 to t2) instead of the measured value of the tissue impedance Z in FIG.
When the comparison result is larger than the threshold value, the coagulation output is continued (from time t2 to t3), and after the comparison (time t3 to t4), the coagulation output is stopped when the comparison result becomes smaller than the threshold value. Show.

In step S13, the coagulation output is stopped in the case of the first embodiment until the coagulation pedal is released. However, in this embodiment, the coagulation output is reduced to a value lower than the set value. Keep and do not stop. Other operations are the same as those of the first embodiment.

This embodiment has the following effects. As described above, in the embodiment of the present invention, the coagulation electrode 11 for coagulating and outputting the tissue state detecting / dissecting electrode 12 for judging the coagulation state of the tissue as described in the first embodiment Since the tissue is brought into contact with another portion, it is possible to determine whether coagulation of a wider range of tissue has been completed as compared with the case where the determination is made from the tissue impedance obtained from the coagulation electrode 11.

Further, in this embodiment, since the control is performed only by the current sensor, the configuration of the apparatus is not complicated and can be realized at a lower cost.

In the above-described embodiment, the electrodes are switched to determine whether or not the coagulation state has completed the coagulation treatment.
A high-frequency current having a frequency different from the frequency of the high-frequency current for performing the coagulation treatment by the coagulation electrode 11 is applied to the second electrode 2 and the return electrode 13 so that the tissue state detecting / dissecting electrode 12 and the return electrode 1
Alternatively, it may be determined whether or not the tissue is in a coagulated state by measuring the impedance or current value of the tissue between the two.

[Supplementary Notes] In a high-frequency ablation power supply device having a high-frequency current generating means for generating a high-frequency current for treatment and at least one treatment electrode for supplying the high-frequency current for treatment to the tissue, for detecting a physical state of the tissue Detection current generation means for generating a detection current, a detection current supply electrode for contacting the tissue at a site different from the treatment electrode, a detection current supply electrode for supplying the detection current generated by the detection means to the tissue, and the detection current A high-frequency ablation power supply device, comprising: a measuring unit that measures a detection current supplied to the tissue from a supply electrode; and a unit that determines a physical state of the tissue based on a measurement result by the measuring unit.

2. The electrode according to claim 1, further comprising a connection means for selectively connecting the detection current supply electrode to the detection current supply means and a treatment high-frequency current supply means for using the detection current supply electrode as a treatment electrode. Electric surgery equipment.

3. The electrosurgical apparatus according to claim 1, wherein the magnitude of the treatment high-frequency current is changed according to the physical state of the tissue obtained from the detection current supply electrode.

4. The electrosurgical apparatus according to claim 2, wherein the treatment high-frequency current supply means is connected to the detection current supply electrode in accordance with the physical state of the tissue obtained from the detection current supply electrode.

5. Treatment high-frequency generation means for generating a treatment high-frequency current, output changing means for changing the power thereof, detection current generation means for generating a detection current, measurement means for measuring an electrical parameter of the detection current, and measurement means And a control means for controlling the output control means on the basis of information from the apparatus, wherein the control means determines whether the electrodes are substantially short-circuited based on information from the measurement means before output. The high-frequency ablation power supply device is characterized by determining whether or not to output the treatment high-frequency current.

6. The electrosurgical apparatus according to claim 5, wherein the treatment high-frequency generator is used as a detection current generator.

7. 6. The electrosurgical apparatus according to claim 5, wherein the output is not permitted when the electric parameter is impedance and the value is below a threshold.

[0062]

As described above, according to the present invention, there is provided a treatment high-frequency current generating means for generating a treatment high-frequency current, and at least one means for supplying the treatment high-frequency current to a treatment target portion of a tissue. A treatment electrode, a detection current generating means for generating a detection current for detecting a physical state of the tissue, and a treatment target site of the tissue being brought into contact with the treatment electrode at a different position from the treatment electrode, A detection current supply electrode for supplying a treatment target site of the tissue,
Measuring means for measuring the detection current supplied to the treatment target site of the tissue from the detection supply electrode, and judging means for judging the physical state of the treatment target site of the tissue based on the measurement result by the measuring means. , So that the physical state of the tissue is detected by the detection current supply electrode in contact with the tissue at a site different from the treatment electrode, compared to the case where the physical state of the tissue is detected from the treatment electrode. It is possible to determine whether coagulation of a wider range of tissue has been completed.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a high-frequency ablation device according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram showing a configuration of a distal end of the treatment tool.

FIG. 3 is a sectional view showing a configuration of a distal end of the treatment tool.

FIG. 4 is a block diagram showing a configuration of a high-frequency ablation power supply device.

FIG. 5 is a flowchart showing a control operation flow of the control circuit of FIG. 4;

FIG. 6 is an explanatory diagram of the operation of the high-frequency ablation power supply device when it is determined that a short circuit or a non-short circuit has occurred.

FIG. 7 is an explanatory diagram of the operation of the high-frequency ablation power supply device until the completion of solidification is determined when it is determined that a non-short circuit has occurred.

FIG. 8 is a block diagram showing a configuration of a high-frequency ablation power supply device according to a second embodiment of the present invention.

FIG. 9 is an explanatory diagram of the operation of the high-frequency ablation power supply device until the completion of solidification is determined when it is determined that a short circuit has not occurred.

FIG. 10 is an explanatory view showing a state of protein denaturation and a state of change in tissue impedance when a high-frequency current is applied to a living tissue.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... High frequency ablation apparatus 2 ... High frequency ablation power supply apparatus 3 ... Connector part 5 ... Treatment tool 7 ... Patient 8 ... Foot switch 9a ... Incision pedal 9b ... Coagulation pedal 11 ... Coagulation electrode 12 ... Tissue state detection and incision electrode 13 ... Feedback electrode 21 Power supply circuit 22 High frequency generation circuit 23 Waveform circuit 24 Output transformer 25 Switching circuit 26 Current sensor 27 Voltage sensor 28 A / D converter 29 Control circuit

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shinji Hatta 2-43-2 Hatagaya, Shibuya-ku, Tokyo Inside Olympus Optical Co., Ltd. (72) Inventor Kazuya Hijii 2-34-2 Hatagaya, Shibuya-ku, Tokyo No. Olympus Optical Co., Ltd. F term (reference) 4C060 FF01 KK03 KK04 KK05 KK08 KK12 KK23 KK25 MM24

Claims (2)

[Claims] 1. A treatment high-frequency current generating means for generating a treatment high-frequency current, at least one treatment electrode for supplying the treatment high-frequency current to a treatment target portion of a tissue, and a physical state of the tissue. A detection current generating means for generating a detection current for detection, a detection of contacting the treatment target site of the tissue at a position different from the treatment electrode, and supplying the detection current to the treatment target site of the tissue A current supply electrode; measuring means for measuring the detection current supplied from the detection supply electrode to the treatment target site of the tissue; and a physical state of the treatment target site of the tissue based on the measurement result by the measurement means. An electrosurgical apparatus, comprising: a determination unit configured to determine: 2. The treatment high-frequency current output from the treatment electrode is detected as an incision output for incising tissue by detecting the end of coagulation of the treatment target portion of the tissue based on a result of the determination by the determination means. 2. The electrosurgical apparatus according to claim 1, further comprising control means for performing such control.