JP3720413B2 - Electrosurgical equipment - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to an electrosurgical apparatus for incising and hemostatically coagulating a living tissue with a so-called electric knife.
[0002]
[Prior art]
2. Description of the Related Art In recent years, electrosurgical devices such as electric scalpels that apply high frequency (several hundreds of kHz) and high voltage (several hundreds to thousands of volts) have been widely used in surgical operations and the like. In such an electrosurgical operation, safety is particularly important.
[0003]
An electrosurgical apparatus using an electric knife uses various high-frequency signal waveforms such as continuous wave, mixed wave, and burst wave in operation. These high-frequency signal waveforms are generally stored in advance in a storage device or the like, and a specific waveform is taken out and used as necessary. Alternatively, the high frequency signal waveform is generated by a frequency dividing means, a counter and a multiplying means based on the source oscillation signal. It goes without saying that a high-frequency signal waveform can be generated by combining the above methods.
[0004]
[Problems to be solved by the invention]
However, in the conventional electrosurgical device described above, when outputting a high-frequency signal by an actual electric knife, it has not been detected whether a high-frequency voltage or high-frequency signal for treatment is output in a desired waveform, In some cases, excessive or insufficient treatment, that is, overburning or incompleteness may occur during the operation, and the desired operation may not be performed.
[0005]
The electrosurgical device of the present invention has been made paying attention to such a problem, and the purpose thereof is to monitor the waveform generated by the waveform generating means, thereby causing failure or malfunction of the waveform generating means. An object of the present invention is to provide an electrosurgical device that prevents inadvertent output and improves safety during surgery.
[0006]
[Means for Solving the Problems]
In order to achieve the above-described object, a first aspect of the present invention is an electrosurgical apparatus, which generates power necessary for performing a treatment and supplies the power to a treatment unit. First waveform generating means for generating and outputting one waveform signal; second waveform generating means for generating and outputting a second waveform signal related to the first waveform signal; and Using the second waveform signal output from the waveform generation means, a waveform abnormality detection means for detecting an abnormality in the first waveform signal, and when an abnormality in the first waveform signal is detected, Power supply control means for controlling the power supplied from the power generation means to the treatment section.
A second aspect of the present invention is an electrosurgical device, which generates power necessary for performing a treatment and supplies the power to a treatment unit, and a first waveform signal. Based on the rising waveform signal output from the rising edge detecting means, the rising edge detecting means for detecting the rising edge of the first waveform signal output from the first waveform generating means; And output from the first waveform generation means based on the second waveform generation means for generating the second waveform signal and the second waveform signal output from the second waveform generation means. Waveform abnormality detection means for detecting an abnormality in the first waveform signal, and power supply for controlling power supplied from the power generation means to the treatment section when an abnormality in the first waveform signal is detected Control means .
According to a third aspect of the present invention, there is provided an electrosurgical apparatus that generates power necessary for performing a treatment and supplies the power to a treatment unit, and a reference for generating a predetermined reference signal. A signal generating means; a voltage generating means for generating a voltage N times the reference signal output from the reference signal generating means; a voltage dividing means for dividing the N times voltage output from the voltage generating means; Range detection means for detecting whether a deviation of the divided pressure signal output from the voltage dividing means with respect to the reference signal output from the reference signal generating means is within a predetermined range; and output from the voltage dividing means Power supply control means for controlling the power supplied from the power generation means to the treatment section when it is detected that the deviation of the divided voltage signal is not within a predetermined range.
[0007]
[Action]
That is, the electrosurgical device of the present invention detects the high-frequency signal waveform generated by the waveform generating means, and controls the high-frequency signal output from the waveform generating means in accordance with the detection result.
[0008]
【Example】
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a diagram showing the configuration of the first embodiment of the present invention. As an external configuration, an electric scalpel device main body 1 includes a power cord 2 that supplies power to the device main body 1 and an electric scalpel handpiece 3 that performs treatment on a patient based on a high-frequency signal output from the electric scalpel device main body 1. And the counter electrode plate 4 is connected.
[0009]
Below, the internal structure of the electrosurgical apparatus main body 1 is demonstrated. The control means 9 for controlling each means described below includes a CPU means 22. The waveform generating means 12 for generating the waveform divides the source oscillation signal generated by the source oscillating means 13 by n by the frequency dividing means 14 and re-divides the frequency by the counter means 16 controlled by the CPU means 22. The multiplication means 18 multiplies the frequency division generated by the counter means 16 to generate various waveforms. Further, the waveform selection means 20 controlled by the CPU means 22 selects the waveform generated by the multiplication means 18. In the waveform generating means 12, the same operation as described above is also performed by the frequency dividing means 15, the counter means 17, the multiplying means 19, and the waveform selecting means 21.
[0010]
The power supply means 5 generates a DC voltage from the commercial power supply supplied by the power cord 2 and supplies the DC voltage to the filter means 6 and the switch means 7. The DC voltage is applied to the output transformer means 8 and the power amplifier means 11. The power amplifier means 11 performs switching amplification with the waveform selected by the waveform selection means 20. The detection means 10 composed of the EXOR circuit 23 performs a logical operation on the two waveforms generated by the waveform generation means 12 and sends the result to the control means 9.
[0011]
The operation of the configuration of the first embodiment will be described below.
In the waveform generation means 12, a certain waveform is generated by the source oscillation means 13, the frequency division means 14, the counter means 16, the multiplication means 18, and the waveform selection means 20. A waveform is generated by the source oscillating means 13, the frequency dividing means 15, the counter means 17, the multiplying means 19, and the waveform selecting means 21, and this waveform is assumed to be waveform 2 here.
[0012]
FIG. 5 shows the waveform 1 and the waveform 2 and the waveform of the EXOR-OUT that is the output from the EXOR circuit 23, where “H” is normal and “L” is abnormal. In the case of FIG. 5, since the waveform 1 and the waveform 2 are the same waveform, EXOR-OUT is “H” and is determined to be normal.
[0013]
Here, when at least one of the frequency dividing means 14, the counter means 16, the multiplying means 18 and the waveform selecting means 20 fails, the waveform 1 is transformed into an unintended waveform as shown as the waveform 3 as shown in FIG. May be output. The EXOR-OUT at this time is as shown in FIG. That is, EXOR-OUT indicates “H” when the waveform 2 and the waveform 3 are the same waveform, whereas EXOR-OUT indicates “L” when the waveform 2 and the waveform 3 are different. That is, it is detected as abnormal. The output result of the EXOR circuit 23 is transmitted to the control means 9, and the control means 9 controls the switch means 7 to stop the output. Here, the output can also be stopped by controlling the power supply means 5. Further, the output can be stopped by controlling the waveform generating means 12.
[0014]
According to the first embodiment described above, it is possible to prevent at least one of the waveform generating means 12 from causing a failure and malfunction, and transmitting an unintended waveform to the output transformer means and the power amplifier means to be output at high frequency. I can do it.
The second embodiment of the present invention will be described below.
[0015]
FIG. 2 is a diagram showing the configuration of the second embodiment of the present invention. The external configuration of the electrosurgical device main body 1 is the same as that of the first embodiment.
The internal configuration will be described below. The control means 9 for controlling each means includes a CPU means 22. The waveform generating means 12 includes a source oscillating means 13, a frequency dividing means 14, and a multiplying means 18, and the source oscillation signal generated by the source oscillating means 13 is divided by n by the frequency dividing means 14 and then multiplied by the multiplying means 18. It is multiplied with the waveform transmitted from the CPU means 22.
[0016]
The DC voltage generated by the power supply means 5 is applied to the output transformer means 8 and the power amplifier means 11 via the filter means 6 and the switch means 7. The power amplifier means 11 receives the waveform generated by the waveform generation means 12 and performs switching amplification. The detection means 10 includes a rising edge detection means 24 and a latch means 25 that holds an output result for a predetermined time.
[0017]
The waveform signal input to the multiplying means 18 by the CPU means 22 is also input to the rising edge detecting means 24 to detect the rising edge, and the latch means 25 is controlled using the detected result. Then, the output state of the latch means 25 after the CPU means 22 starts to transmit the waveform is transmitted to the CPU means 22.
[0018]
The operation of the configuration of the second embodiment will be described below. A waveform input to the multiplication unit 18 and the rising detection unit 24 by the CPU unit 22 is referred to as a waveform 4. The waveform input from the rising edge detection unit 24 to the latch unit 25 is a waveform 5. A waveform inputted from the latch means 25 to the CPU means 22 is a waveform 6.
[0019]
7, 8, and 9 respectively show a waveform 5 and a waveform 6 when the waveform 4 takes three types of waveforms, a continuous wave, a burst wave, and a mixed wave. In the case of FIG. 7, when the waveform 4 is input, the rising detection means 24 outputs a waveform 5 that is a waveform rising by one wave. The latch means 25 performs a series of operations of receiving a rising edge of the waveform 5 and outputting a waveform that is "H" for a predetermined time t1.
[0020]
In the case of FIG. 8, the rising detection means 24 outputs the waveform 5 which is a continuously rising waveform by inputting the waveform 4 as described above. In this case, the latch means 25 receives the rising edge of the waveform 5 and outputs "H" for a predetermined time t1 and tries to become "L". However, since the next rising edge is inputted after t2, t1 starts again from that point. Only “H”. Since this operation is continuously repeated, the latch means 25 remains “H” as a result when it becomes “H” at one end.
[0021]
The mixed wave shown in FIG. 9 operates in the same manner as described above, but the waveform 5 which is the output of the rise detection means 24 is finally the output of the latch means 25 because there is no next rise within t1 from the third wave. The waveform 6 cannot be maintained at “H” and becomes “L”.
[0022]
Here, when the waveform 6 which is the output waveform of the latch means 25 is compared in FIGS. 7, 8 and 9, the judgment point A after T1 and the judgment point B after T2 after the waveform 4 is outputted from the CPU means 22. Is different in each figure. Therefore, if the judgment point A and judgment point B of the waveform 6 are detected by the CPU means 22, it can be judged whether the waveform type is intended. If it is abnormal, the control means 9 controls the switch means 7 to stop the output.
[0023]
According to the second embodiment described above, the waveform can be monitored without duplicating the circuit by the waveform generating means 12, and the mounted parts can be reduced.
The third embodiment of the present invention will be described below.
[0024]
FIG. 3 is a diagram showing the configuration of the third embodiment. The external configuration of the electrosurgical device main body 1 is the same as that of the first embodiment.
The internal configuration will be described below. The control unit 9 includes a CPU unit 22 and a D / A conversion unit 26, and a digital signal transmitted by the CPU unit 22 is converted into an analog signal by the D / A conversion unit 26. The D / A conversion means 26 is connected to the power supply means 5, and the power supply means 5 generates a DC voltage N times the analog signal input from the D / A conversion means 26. Here, the D / A conversion means 26 may be composed of a plurality of circuits.
[0025]
Further, the detecting means 10 includes a window comparing means 27 and a voltage dividing means 28, and the DC voltage from the power supply means 5 is transmitted to the voltage dividing means 28 via the filter means 6 and the switch means 7. / N is divided. One of the two inputs to the window comparator 27 is input from the D / A converter 26, and the other is input with a voltage divided by 1 / N by the voltage divider 28.
[0026]
The operation of the configuration of the third embodiment will be described below.
The output of the D / A conversion means 26 is connected to two means, one of which is the power supply means 5. Here, if the analog signal output from the D / A conversion means 26 is X [V], the power supply means 5 generates a DC voltage N times and outputs it through the filter means 6 and the switch means 7. This DC voltage is applied to the transformer means 8 and the power amplifier means 11. This DC voltage is also applied to the voltage dividing means 28 and divided to 1 / N, and then inputted to one input of the window comparing means 27. This voltage is C [V].
[0027]
The other output of the D / A conversion means 26 is directly input to the window comparing means 27. The voltage is D [V]. Here, when the error coefficient of the power supply means 5 is α and the error coefficient of the voltage dividing means 28 is β, the following equation is established.
[0028]
C = X ・ N ・ α ・ (1 / N) ・ β = α ・ β ・ X
D = X
Here, the window comparing means 27 compares C and D with a certain range, and the certain range means, for example, whether or not the deviation is within a range of ± 20% with reference to D. In this embodiment, when the deviation becomes a value of ± 20% or more, it is determined as abnormal and transmitted to the control means 9, and the output is stopped by controlling the switch means 7.
[0029]
According to the third embodiment described above, it is monitored whether the deviation of the DC output from the power supply means 5 with respect to the desired output is larger than a predetermined range, and if it is abnormal, the high frequency output is stopped. ing. Therefore, the failure and malfunction of each means from the power supply means 5 to the voltage dividing means 28 can be detected with a simple configuration. In addition, the D / A converter means 26 doubles the D / A converter to make the analog signal independent and input it to the power supply means 5 and the window comparator means 27, so that a failure or malfunction of the D / A converter means 26 can be prevented. Can also be detected.
[0030]
The fourth embodiment of the present invention will be described below.
FIG. 4 is a diagram showing the configuration of the fourth embodiment. The external configuration of the electrosurgical device main body 1 is the same as that of the first embodiment.
[0031]
The internal configuration will be described below. The control unit 9 includes a CPU unit 22 and a D / A conversion unit 26. The digital signal input by the CPU means 22 is converted to an analog signal via the D / A conversion means 26 and transmitted to the power supply means 5. The power supply unit 5 generates a DC voltage N times the analog signal output from the D / A conversion unit 26.
[0032]
The detection means 10 includes an A / D conversion means 29 and a voltage dividing means 28. The DC voltage generated by the power supply means 5 is input to the voltage dividing means 28 via the filter means 6 and the switch means 7 and is divided into 1 / N. The voltage divided by 1 / N is input to the A / D conversion means 29, converted into a digital signal, and transmitted to the control means 9.
[0033]
The operation of the configuration of the fourth embodiment will be described below.
Assuming that a digital signal F (E) is transmitted from the CPU means 22 so that the analog signal output from the D / A conversion means 26 becomes E [V], the power supply means 5 has a DC that is N times E [V]. A voltage is generated, and this DC voltage is supplied to the output transformer means 8, the power amplifier means 11, and the voltage dividing means 28 via the filter means 6 and the switch means 7. The voltage dividing means 28 divides the input DC voltage into 1 / N, and then A / D conversion means 29 performs digital conversion. Here, the analog signal input to the A / D conversion means 29 is G. If the error coefficient in the power supply means 5 is α and the error coefficient in the voltage dividing means 28 is β, the following equation is established.
[0034]
G = E ・ N ・ α ・ (1 / N) ・ β = α ・ β ・ E
That is, the digital signal output from the CPU means 22 as F (E) is input to the A / D conversion means 29 as an analog signal of α, β, E through each means. The A / D conversion means 29 transmits a digital signal F (α · β · E) to the CPU means 22. The CPU means 22 compares F (E) and F (α · β · E) to determine whether F (α · β · E) is within a predetermined range with respect to F (E), for example, It is determined whether the deviation is within ± 20%. If the deviation is out of the range, the control means 9 controls the switch means 7 to stop the output.
[0035]
According to the fourth embodiment described above, it is possible to easily realize the expansion or narrowing of the range in which two digital signals F (E) and F (α · β · E) are compared and calculated by changing the program. Further, although it is well known that the electric knife device outputs a high frequency with various waveforms, it can be realized without adding a circuit even when it is desired to change the range for each waveform.
[0036]
The technical idea of the following configuration is derived from the specific embodiment described above.
(1) In electrosurgical equipment,
Waveform generating means for generating and outputting a high-frequency signal waveform;
Detecting means for detecting the high-frequency signal waveform generated by the waveform generating means;
Control means for controlling the high-frequency signal output from the waveform generating means according to the result of detection by the detecting means;
An electrosurgical device characterized by comprising:
(2) The electrosurgical device according to (1), wherein the waveform generating means has at least a double circuit configuration.
(3) The electrosurgical device according to (2), wherein the detection unit is a logical operation unit that performs a logical operation between outputs from the double or more circuits.
(4) The detection means includes
Rise detection means for detecting the rise of the signal waveform generated by the waveform generation means;
Latch means that is set by the rising edge detection means and retains logic for a certain period of time;
The electrosurgical device according to the configuration (1) including:
(5) In an electrosurgical apparatus comprising power supply means for generating a voltage necessary for generating high-frequency energy, and amplifier means for amplifying the voltage generated by the power supply means with high-frequency energy,
Detection means for detecting the magnitude of the voltage applied to the amplifier means;
Control means for controlling the high-frequency output from the high-frequency signal generating means according to the result of detection by the detecting means;
An electrosurgical device comprising:
(6) The electrosurgical device according to (5), wherein the detection unit is a comparison unit that compares an output voltage from the power supply unit with an output from the control unit.
(7) The electrosurgical device according to (5), wherein the detection unit is an A / D conversion unit that performs A / D conversion on an output voltage from the power supply unit.
[0037]
Problems to be solved by the related art and the invention for the above configurations (1) to (4) are as follows.
(Conventional technology)
In recent years, electrosurgical devices that apply high frequency (several hundreds of kHz) and high voltage (several hundreds to thousands of volts) have been widely used in surgery and the like. In such an electrosurgical operation, safety is particularly important.
[0038]
An electrosurgical apparatus using an electric knife uses various high-frequency signal waveforms such as continuous wave, mixed wave, and burst wave in operation. These high-frequency signal waveforms are generally stored in advance in a storage device or the like, and a specific waveform is taken out and used as necessary. Alternatively, the high frequency signal waveform is generated by a frequency dividing means, a counter and a multiplying means based on the source oscillation signal. It goes without saying that a high-frequency signal waveform can be generated by combining the above methods.
(Problems to be solved by the invention)
However, in the above-described conventional electrosurgical apparatus, it is not detected whether the high frequency voltage or high frequency for treatment is output in a desired waveform at the time of high frequency output by an actual electric scalpel. Insufficiency, that is, overburning or incompleteness may occur during the operation, and the desired operation may not be performed .
[0039]
The electrosurgical device of the present invention has been made paying attention to such a problem, and the purpose thereof is to monitor the waveform generated by the waveform generating means, thereby causing failure or malfunction of the waveform generating means. An object of the present invention is to provide an electrosurgical device that prevents inadvertent output and improves safety during surgery.
[0040]
Further, the problems to be solved by the prior art and the invention for the above configurations (5) to (7) are as follows.
(Conventional technology)
In recent years, electrosurgical devices that apply high frequency (several hundreds of kHz) and high voltage (several hundreds to thousands of volts) have been widely used in surgery and the like. In such an electrosurgical operation, safety is particularly important.
[0041]
An electrosurgical device using an electric knife generally outputs various high-frequency waveforms such as continuous wave, mixed wave, and burst wave in one device.
In addition, as described above, the electric knife is a device that is used at a high voltage. In consideration of this point, the incision ability and the coagulation ability have been improved, but whether or not the high frequency output is output with the desired power. In order to detect this, a method has been used in which a high-frequency output (several hundred to several thousand V) is separated by an insulating means and a result obtained there is detected.
(Problems to be solved by the invention)
However, the above-described conventional electrosurgical device has a drawback in that the high frequency output is detected by the actual means through the insulating means, so that it is vulnerable to noise or the device becomes large.
[0042]
The electrosurgical device of the present invention has been made paying attention to such a problem, and the object is to obtain a deviation of the high frequency output without directly detecting the high frequency high voltage output of the electrosurgical device. Another object of the present invention is to provide an electrosurgical device with improved safety during surgery with a simple configuration.
[0043]
【The invention's effect】
According to the present invention, since the waveform generated by the waveform generation means is monitored, inadvertent output due to failure or malfunction of the waveform generation means can be prevented, and safety during surgery can be improved.
[Brief description of the drawings]
FIG. 1 is a diagram showing a configuration of a first exemplary embodiment of the present invention.
FIG. 2 is a diagram showing a configuration of a second exemplary embodiment of the present invention.
FIG. 3 is a diagram showing a configuration of a third exemplary embodiment of the present invention.
FIG. 4 is a diagram showing a configuration of a fourth exemplary embodiment of the present invention.
FIG. 5 is a diagram showing a first example of two waveforms from the waveform generating means and an output waveform from the EXOR circuit in the first embodiment.
FIG. 6 is a diagram showing a second example of the operation of the first example, two waveforms from the waveform generating means and an output waveform from the EXOR circuit in the first example.
FIG. 7 is a diagram showing output waveforms of a rise detection means and a detection means when the output from the control means is a continuous wave in the second embodiment.
FIG. 8 is a diagram showing output waveforms of a rise detection means and a detection means when the output from the control means is a burst wave in the second embodiment.
FIG. 9 is a diagram showing output waveforms of a rise detection means and a detection means when the output from the control means is a mixed wave in the second embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Electric knife apparatus main body, 2 ... Power cord, 3 ... Electric knife handpiece, 4 ... Counter electrode plate, 5 ... Power supply means, 6 ... Filter means, 7 ... Switch means, 8 ... Output transformer means, 9 ... Control means, DESCRIPTION OF SYMBOLS 10 ... Detection means, 11 ... Power amplifier means, 12 ... Waveform generation means, 13 ... Source oscillation means, 14, 15 ... Frequency division means, 16, 17 ... Counter means, 18, 19 ... Multiplication means, 20, 21 ... Waveform Selection means, 22 ... CPU means, 23 ... EXOR circuit.

Claims (3)

An electrosurgical device,
Power generation means for generating power necessary for performing treatment and supplying the power to the treatment unit;
  First waveform generating means for generating and outputting a first waveform signal;
  Second waveform generating means for generating and outputting a second waveform signal related to the first waveform signal;
  Using the second waveform signal output from the second waveform generation means, a waveform abnormality detection means for detecting an abnormality of the first waveform signal;
  Power supply control means for controlling power supplied from the power generation means to the treatment section when an abnormality of the first waveform signal is detected;
An electrosurgical device comprising: An electrosurgical device,
  Power generation means for generating power necessary for performing treatment and supplying the power to the treatment unit;
  First waveform generating means for generating and outputting a first waveform signal;
  Rise detection means for detecting the rise of the first waveform signal output from the first waveform generation means;
  Second waveform generating means for generating a second waveform signal based on the rising signal output from the rising detection means;
  A waveform abnormality detection means for detecting an abnormality in the first waveform signal output from the first waveform generation means based on the second waveform signal output from the second waveform generation means;
  Power supply control means for controlling power supplied from the power generation means to the treatment section when an abnormality of the first waveform signal is detected;
An electrosurgical device comprising: An electrosurgical device,
  Power generation means for generating power necessary for performing treatment and supplying the power to the treatment unit;
  A reference signal generating means for generating a predetermined reference signal;
  Voltage generating means for generating a voltage N times the reference signal output from the reference signal generating means;
  Voltage dividing means for dividing the N times voltage output from the voltage generating means;
  Range detecting means for detecting whether a deviation of the divided pressure signal output from the voltage dividing means with respect to the reference signal output from the reference signal generating means is within a predetermined range;
  Power supply control means for controlling the power supplied from the power supply means to the treatment section when it is detected that the deviation of the divided pressure signal output from the voltage dividing means is not within a predetermined range; ,
An electrosurgical device comprising:

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