Drive detection system and surgical operation system

Abstract

For the purpose of detecting whether an energy device is being driven or not regardless of the type and output mode of the energy device, this drive detection system is provided with: a sensor unit which has both an amplifier circuit that amplifies the amplitude of an electromagnetic wave generated from the energy device and a second clipping circuit that outputs a clipping signal generated by clipping the amplitude of a signal amplified in the amplifier circuit by a predetermined first upper-limit threshold value and a predetermined lower-limit threshold value; and a control unit which has an output unit that outputs a signal showing the driving of the energy device on the basis of the clipping signal.

Description

Driving detection system and surgical system

[0001] The present disclosure relates to actuation and sensing systems and surgical systems.

[0002] Laparoscopic surgery, which uses an endoscope to perform surgical procedures, is known. Laparoscopic surgery may require an energy device that outputs high frequency waves, a smoke evacuation device that evacuates smoke generated by cauterizing body tissue, and an insufflation device to ensure a working space within the abdominal cavity. Patent Document 1 (JP-A-2005-102626) discloses an endoscopic surgery system that controls the operation of the smoke evacuation device and the insufflation device based on the detection of high frequency noise from a high frequency cauterization device that supplies high frequency waves to a high frequency treatment instrument.

[0003] Japanese Patent Application Publication No. 2009-131466

[0004] A drive detection system according to one aspect of the present disclosure includes a sensor unit having an antenna that acquires electromagnetic waves generated from an energy device, an amplifier circuit that amplifies the amplitude of the electromagnetic waves acquired by the antenna, and a clipping circuit that outputs a clipping signal obtained by clipping the amplitude of the signal amplified by the amplifier circuit using predetermined first upper and first lower thresholds, and a control unit. The control unit has an output unit that outputs a signal indicating the drive of the energy device based on the clipping signal.

[0005] 1 is a schematic diagram showing a surgical system according to one aspect of the present disclosure; FIG. 2 is a block diagram showing an example of the configuration of a drive detection system included in the surgical system shown in FIG. 3 is a diagram explaining signals output within a sensor unit; FIG. 3 is a diagram explaining conditions for determining drive of an energy device in the drive detection system; FIG. 4 is a diagram showing, as a graph, the contents of signal processing within a sensor unit that detects electromagnetic waves generated from an energy device; FIG. 5 is a diagram showing, as a graph, the contents of signal processing within a sensor unit that detects electromagnetic waves generated from an energy device; FIG. 6 is a diagram showing, as a graph, the contents of signal processing within a sensor unit that detects electromagnetic waves generated from an energy device; FIG. 7 is a diagram showing, as a graph, the contents of signal processing within a sensor unit that detects electromagnetic waves generated from an energy device.

[0006] First Embodiment Hereinafter, one aspect of the present disclosure will be described with reference to FIGS.

[0007] [Overview of Surgical System] A surgical system 100 according to one aspect of the present disclosure will be described with reference to Fig. 1. Fig. 1 is a schematic diagram showing the surgical system 100. The surgical system 100 of the present disclosure is a system used in laparoscopic surgery.

[0008] Generally, laparoscopic surgery is a method in which a laparoscope, a type of endoscope, is inserted into the abdominal cavity of a patient 1, and surgery is performed while observing the state of the abdominal cavity displayed on a monitor. In laparoscopic surgery, the laparoscope or specialized surgical instruments are inserted through several small incisions (holes) of about 3 to 15 mm made in the patient's abdomen. The working space within the patient's abdominal cavity is secured by supplying CO2 gas using an insufflation device. When an energy device is used in laparoscopic surgery, surgical smoke is generated as the patient's body tissue is cauterized. Therefore, it is necessary to evacuate the generated surgical smoke outside the patient's body.

[0009] As shown in Figure 1, in laparoscopic surgery, trocars 2A and 2B are inserted into incisions made in the abdomen of a patient 1. The trocar 2A is a tubular member that forms a path for guiding surgical instruments into the abdominal cavity of the patient 1. Surgical instruments are inserted into the abdominal cavity of the patient 1 via the trocar 2A. At least one trocar 2A is inserted into the abdomen of the patient 1. The trocar 2B is a trocar that can aspirate gas from within the abdominal cavity of the patient 1. The portion of the trocar 2B that is inserted into the abdominal cavity of the patient 1 has an opening that allows gas to enter and exit. By connecting a smoke evacuation device 50, which will be described later, to the trocar 2B, it becomes possible to aspirate gas from within the abdominal cavity of the patient 1 using the trocar 2B.

[0010] The surgical system 100 includes a drive detection system 10, an energy device 40, and a smoke evacuation device 50. The energy device 40 is a medical cauterization device having a drive unit 41 and a treatment instrument 42. Examples of the energy device 40 include an electric scalpel device and an ultrasonic coagulation and cutting device. The drive unit 41 is connected to the treatment instrument 42 by a cable (drive cable) 43 and supplies high-frequency current to the treatment instrument 42. The frequency and intensity of the high-frequency energy supplied from the drive unit 41 vary depending on the type of energy device 40. The frequency of the high-frequency energy supplied from the drive unit 41 may include multiple frequency components.

[0011] The treatment instrument 42 is an instrument for cauterizing the body tissue of the patient. Treatment using the treatment instrument 42 is performed by inserting the treatment instrument 42 into the abdominal cavity of the patient 1 via the trocar 2A. Within the abdominal cavity of the patient, treatment such as resection of the tissue of the patient 1 or coagulation of blood vessels is performed using the treatment instrument 42.

[0012] The energy device 40 may be configured to have a plurality of output modes with different output energy patterns. The output mode is changed by operating an operation button provided on the treatment instrument 42 or an operation button provided on the drive unit 41. Examples of the output mode include an incision mode, a coagulation mode, etc.

[0013] The smoke exhaust device 50 is a device for exhausting smoke generated by the operation of the energy device 40 to the outside. The smoke exhaust device 50 exhausts surgical smoke generated when body tissue is cauterized by the treatment instrument 42, together with gas in the abdominal cavity, to the outside of the body of the patient 1. The smoke exhaust device 50 has an aspirator connector 51, a trocar connector 52, a smoke exhaust tube 53, a clamp 54, and an aspirator 55.

[0014] The aspirator connector 51 is provided at a first end of the smoke evacuation tube 53. The aspirator connector 51 is connected to an aspirator 55. The trocar connector 52 is provided at a second end of the smoke evacuation tube 53. The trocar connector 52 is connected to a trocar 2B. When the aspirator 55 is operating, gas in the abdominal cavity of the patient 1 can be aspirated through the trocar 2B. The gas aspirated by the trocar 2B is sent to the aspirator 55 through the smoke evacuation tube 53.

[0015] The clamp 54 is a device that restricts the suction of gas by the aspirator 55 by blocking a portion of the flow path of the smoke exhaust tube 53 through which the gas flows. The clamp 54 is connected to the drive detection system 10 by a connection cable 11. The clamp 54 opens and closes the flow path of the smoke exhaust tube 53 based on a signal that indicates the drive of the energy device 40 output from the drive detection system 10.

[0016] The clamp 54 has a pressing member that presses against the smoke exhaust tube 53 to close the flow path of the smoke exhaust tube 53. When the energy device 40 is stopped during surgery, the pressing member of the clamp 54 presses against the smoke exhaust tube 53 to close the flow path. When the energy device 40 is operating, the clamp 54 releases the pressing member from pressing against the smoke exhaust tube 53. This opens the flow path of the smoke exhaust tube 53, allowing the aspirator 55 to suction gas.

[0017] The smoke exhaust device 50 may be configured to control the operation of the suction device 55 based on a signal output from the control unit 30 indicating the operation of the energy device 40. In this case, the smoke exhaust device 50 activates the suction device 55 when it receives a signal from the control unit 30 indicating the operation of the energy device 40. On the other hand, the smoke exhaust device 50 does not activate the suction device 55 when it does not receive a signal from the control unit 30 indicating the operation of the energy device 40. With this configuration, the smoke exhaust device 50 does not need to be equipped with a clamp 54.

[0018] According to the above configuration, the smoke exhaust device 50 operates in response to the activation of the energy device 40. This reduces the effects of surgical smoke generated by the activation of the energy device 40. Furthermore, it is possible to reduce the amount of gas exhausted from the abdominal cavity of the patient 1 during surgery. This reduces the amount of CO2 gas supplied from the insufflation device during surgery.

[0019] [Drive Detection System] The drive detection system 10 will be described with reference to Figures 1 and 2. Figure 2 is a block diagram showing an example of the configuration of the drive detection system 10 included in the surgical system 100 shown in Figure 1. The drive detection system 10 is a system that detects the drive state of the treatment instrument 42. As shown in Figure 2, the drive detection system 10 has a sensor unit 20 and a control unit 30.

[0020] The sensor unit 20 is an RF (Radio Frequency) sensor that acquires electromagnetic waves generated from the energy device 40. The sensor unit 20 has an antenna 21, a first clipping circuit 22, an amplifier circuit 23, and a second clipping circuit (clipping circuit) 24. The antenna 21 receives the electromagnetic waves generated from the energy device 40. Acquiring the electromagnetic waves generated from the energy device 40 includes the antenna 21 receiving the electromagnetic waves. In this embodiment, the antenna 21 is arranged to receive the electromagnetic waves generated from the cable 43. The antenna 21 may also acquire electromagnetic waves generated from the drive device 41. The antenna 21 outputs the acquired electromagnetic waves as an analog signal S.

[0021] The first clipping circuit 22 is a circuit for keeping the voltage value of the analog signal S flowing between the antenna 21 and the amplifier circuit 23 within a certain range. When the voltage value of the analog signal S exceeds a predetermined value, the first clipping circuit 22 clips the analog signal S so that the voltage value of the analog signal S falls within the certain range. The first clipping circuit 22 outputs a clipped signal obtained by clipping the analog signal S to the amplifier circuit 23. When the voltage value of the analog signal S is equal to or less than the predetermined value, the first clipping circuit 22 does not perform clipping and outputs the analog signal S output from the antenna 21 directly to the amplifier circuit 23. By keeping the voltage value of the analog signal S within a certain range in the first clipping circuit 22, the risk of damage to electronic components is reduced. The first clipping circuit 22 may be omitted from the configuration of the sensor unit 20.

[0022] The amplifier circuit 23 amplifies the amplitude of the electromagnetic waves acquired by the antenna 21. The amplifier circuit 23 amplifies the amplitude of the electromagnetic waves acquired by the antenna 21, for example, by ten times or more. The amplifier circuit 23 acquires the clipping signal or analog signal S output from the first clipping circuit 22. The amplifier circuit 23 outputs an amplified signal AS obtained by amplifying the amplitude of the electromagnetic waves. The amplification factor of the electromagnetic wave amplitude in the amplifier circuit 23 may vary depending on the frequency of the acquired electromagnetic waves or the intensity of the analog signal S, and may be set to, for example, fifteen times or more, twenty times or more, eighty times or more, or one hundred times or more. This configuration increases the possibility of recognizing even a slight change in the electromagnetic field environment.

[0023] The second clipping circuit 24 clips the amplitude of the amplified signal AS output by the amplifier circuit 23 using predetermined first upper threshold UT1 and first lower threshold LT1. The second clipping circuit 24 acquires the amplified signal AS output from the amplifier circuit 23. The second clipping circuit 24 clips the amplitude of the acquired amplified signal AS using the first upper threshold UT1 and first lower threshold LT1 to output a clipping signal CS. The first upper threshold UT1 and the first lower threshold LT1 are set to voltage values ​​that can be input to the control unit 30. As an example, the first upper threshold UT1 is set to 3 V, and the first lower threshold LT1 is set to 0 V. For example, the first upper threshold UT1 may be set to a value greater than 3 V. For example, the second lower threshold LT2 may be set to a value less than 0 V. The clipping signal CS output from the second clipping circuit 24 is transmitted to the control unit 30.

[0024] The control unit 30 is a microcomputer including a microprocessor that executes arithmetic processing and memories such as a ROM (Read Only Memory) and a RAM (Random Access Memory). The microprocessor executes various arithmetic processing by executing programs pre-stored in the memory. The control unit 30 includes a determination unit 31 and an output unit 32.

[0025] The determination unit 31 determines whether the clipping signal CS acquired from the second clipping circuit 24 satisfies a predetermined determination condition. The output unit 32 outputs a signal indicating the operation of the treatment instrument 42 based on the clipping signal CS. More specifically, when the determination unit 31 determines that the clipping signal CS satisfies the predetermined determination condition, the output unit 32 outputs a signal indicating that the treatment instrument 42 is being operated.

[0026] The sensor unit 20 and the control unit 30 are disposed inside the housing 12 shown in FIG. 1 . The control unit 30 may be disposed in a housing different from the housing in which the sensor unit 20 is disposed. The housing 12 is disposed so as to surround a portion of the cable 43 at the connection portion 44. The connection portion 44 is the portion where the cable 43 of the energy device 40 is connected to the drive unit 41. The antenna 21 of the sensor unit 20 disposed in the housing 12 is disposed so as to be close to at least a portion of the cable 43. The antenna 21 is close enough to the cable 43 that it can acquire electromagnetic waves generated from the cable 43. According to the above configuration, the sensor unit 20 is disposed at a position away from the treatment instrument 42. This allows the sensor unit 20 to be disposed in a position that is less likely to interfere with the use of the treatment instrument 42 during surgery.

[0027] [Operation of the drive detection system] An example of the operation of the drive detection system 10 will be described with reference to Fig. 3 and Fig. 4. Fig. 3 is a diagram illustrating signals output within the sensor unit 20. Fig. 4 is a diagram illustrating conditions for determining whether to drive the energy device 40 in the drive detection system 10.

[0028] When the energy device 40 is activated, the antenna 21 of the sensor unit 20 acquires electromagnetic waves generated from the cable 43. As shown in FIG. 3 , the antenna 21 outputs the acquired electromagnetic waves as an analog signal S. The amplifier circuit 23 amplifies the amplitude of the analog signal S acquired from the antenna 21 by ten times or more. The amplifier circuit 23 outputs an amplified signal AS obtained by amplifying the amplitude of the analog signal S. The second clipping circuit 24 outputs a clipped signal CS obtained by clipping the amplified signal AS acquired from the amplifier circuit 23 using a first upper threshold UT1 and a first lower threshold LT1.

[0029] The control unit 30 determines whether the energy device 40 is operating based on the clipping signal CS acquired from the second clipping circuit 24. The determination unit 31 of the control unit 30 determines whether the acquired clipping signal CS satisfies a first determination condition and a second determination condition. As shown in FIG. 4 , the first determination condition is that the percentage of the clipping signal CS equal to or greater than a second upper threshold UT2, which is smaller than the first upper threshold UT1, during a predetermined determination period T is equal to or greater than a predetermined determination percentage. The second determination condition is that the percentage of the clipping signal CS equal to or less than a second lower threshold LT2, which is larger than the first lower threshold LT1, during the determination period T is equal to or greater than a predetermined determination percentage.

[0030] For example, when the first range R is defined as the range from the first lower threshold LT1 to the first upper threshold UT1, the second upper threshold UT2 is a value that is 10% smaller than the first upper threshold UT1 by the first range R. For example, the second lower threshold LT2 is a value that is 10% larger than the first lower threshold LT1 by the first range R. The control unit 30 periodically or continuously monitors the voltage value of the clipping signal CS. The determination unit 31 determines whether the monitored voltage value of the clipping signal CS is equal to or greater than the second upper threshold UT2 or equal to or less than the second lower threshold LT2. The determination period T under the first and second determination conditions is the same. For example, the determination percentage under the first and second determination conditions is 30%. The determination percentage under the first determination condition and the determination percentage under the second determination condition may be different.

[0031] When the determination unit 31 determines that the first determination condition and the second determination condition are satisfied, the output unit 32 of the control unit 30 outputs a signal indicating that the energy device 40 is operating. When the clamp 54 of the smoke exhaust device 50 receives the signal indicating that the energy device 40 is operating from the output unit 32, it releases the pressing member from pressing the smoke exhaust tube 53. In other words, when the operation detection system 10 detects that the energy device 40 is operating, the smoke exhaust device 50 performs smoke exhaust.

[0032] To summarize the above, the drive detection method using the drive detection system 10 can be described as follows. First, the sensor unit 20 acquires electromagnetic waves generated by the energy device 40. Next, the amplifier circuit 23 amplifies the amplitude of the acquired electromagnetic waves. Then, the second clipping circuit 24 generates a clipping signal CS by clipping the amplitude of the amplified signal using predetermined first upper threshold UT1 and first lower threshold LT1. Finally, the output unit 32 outputs a signal indicating the drive of the energy device 40 based on the clipping signal CS.

[0033] [Variations in Electromagnetic Field Environments When Energy Device is Driven] Other examples of energy devices 40 whose drive detection can be performed by the drive detection system 10 will be described with reference to Figures 5 to 8. Figures 5 to 8 are graphs showing the details of signal processing within the sensor unit 20 that detects electromagnetic waves generated from the energy device 40. The energy devices shown in Figures 5 to 8 each generate electromagnetic field environments that are different. Figures 5 to 8 show examples in which the sensor unit 20 detects electromagnetic waves generated from the energy device 40 when the energy device 40 is driven.

[0034] 5 shows signals output within the sensor unit 20 that acquires electromagnetic waves from the energy device 40 that generates electromagnetic waves with high frequency components. The upper part of Fig. 5 shows the analog signal S1 output by the antenna 21. The lower part of Fig. 5 shows the clipping signal CS1 output by the second clipping circuit 24.

[0035] Fig. 6 shows signals output within the sensor unit 20 that acquires electromagnetic waves from the energy device 40 that generates electromagnetic waves with low frequency components. The upper part of Fig. 6 shows the analog signal S2 output by the antenna 21. The lower part of Fig. 6 shows the clipping signal CS2 output by the second clipping circuit 24.

[0036] 7 shows signals output within the sensor unit 20 that acquires electromagnetic waves from the energy device 40, which generates electromagnetic waves whose amplitude intensities vary periodically with frequency. The upper part of Fig. 7 shows the analog signal S3 output by the antenna 21. The lower part of Fig. 7 shows the clipping signal CS3 output by the second clipping circuit 24.

[0037] 8 shows signals output within the sensor unit 20 that acquires electromagnetic waves from the energy device 40, which generates electromagnetic waves that are composite waves containing multiple frequency components. The upper part of Fig. 8 shows the analog signal S4 output by the antenna 21. The lower part of Fig. 8 shows the clipping signal CS4 output by the second clipping circuit 24.

[0038] 5 to 8, clipping signals CS1 to CS4 are signals obtained by clipping amplified signals obtained by amplifying analog signals S1 to S4 by a factor of ten or more using amplifier circuit 23. Clipping signals CS1 to CS4 are clipped with a first upper threshold UT1 set to 3 V and a second lower threshold LT2 set to 0 V.

[0039] The control unit 30 determines whether the clipping signals CS1 to CS4 shown in Figures 5 to 8 satisfy the first and second determination conditions. In Figures 5 to 8, the control unit 30 performs the determination under the following conditions: the second upper threshold UT2 of the first determination condition is 2.7 V, the second lower threshold LT2 of the second determination condition is 0.3 V, the determination period T of the first and second determination conditions is 80 μs, and the determination rate of the first and second determination conditions is 30%.

[0040] During the determination period T, the voltage values ​​of the clipping signals CS1 to CS4 are equal to or greater than the second upper threshold UT2 30% of the time, and equal to or less than the second lower threshold LT2 30% of the time. The clipping signals CS1 to CS4 satisfy the first and second determination conditions. Therefore, the control unit 30 can determine that the energy device 40 is operating in the electromagnetic wave environments shown in FIGS. 5 to 8 . That is, the control unit 30 can determine the operating state of each energy device 40 based on the clipping signals CS1 to CS4 under the same determination conditions. This allows the operation detection system 10 to detect the operation of the energy device 40 even if the energy device 40 is operating in a different electromagnetic field environment.

[0041] As shown in Figures 5 to 8, the analog signals S1 to S4 have different signal characteristics (particularly, amplitude strength). In particular, the analog signals S3 to S4 shown in Figures 7 and 8 have large variations in amplitude strength. Therefore, it is difficult to set a threshold value for determining the operating state of the energy device 40 based on the analog signals S1 to S4.

[0042] However, with the above-described configuration, the electromagnetic waves from the energy device 40 are amplified. Therefore, even if the electromagnetic field environment of the energy device 40 when it is operating is weak, it is possible to recognize that electromagnetic waves are being generated from the energy device 40 when it is operating. Furthermore, by clipping the amplified signal of the electromagnetic waves from the energy device 40, the electromagnetic waves from the energy device 40 can be made into a square wave. This reduces variations in amplitude strength regardless of the electromagnetic field environment of the energy device 40.

[0043] The inventors of the present application have discovered that by determining whether or not the determination conditions are met based on this square wave, it is possible to detect the operating state of the energy device 40 using the same determination conditions even if the electromagnetic field environment of the energy device 40 is different. Therefore, with the above configuration, it is possible to detect whether or not the energy device is operating regardless of the type or output mode of the energy device.

[0044] Furthermore, the inventors have found that when the percentage of clipping signals CS1 to CS4 that are equal to or greater than the second upper threshold UT2 is 30% or more and the percentage of clipping signals that are equal to or less than the second lower threshold LT2 is 30% or more, there is a high possibility that the energy device 40 is being driven. Therefore, with the above configuration, it is possible to accurately detect whether the energy device is being driven.

[0045] [Summary] A drive detection system according to a first aspect of the present disclosure includes a sensor unit having an antenna that acquires electromagnetic waves generated from an energy device, an amplifier circuit that amplifies the amplitude of the electromagnetic waves acquired by the antenna, and a clipping circuit that outputs a clipping signal obtained by clipping the amplitude of the signal amplified by the amplifier circuit using predetermined first upper and first lower thresholds, and a control unit. The control unit has an output unit that outputs a signal indicating the drive of the energy device based on the clipping signal.

[0046] In a drive detection system according to a second aspect of the present disclosure, in the first aspect, the control unit further includes a determination unit configured to determine whether a first determination condition is satisfied, that is, a rate at which the clipping signal is equal to or greater than a second upper threshold value that is smaller than the first upper threshold value, during a predetermined period, is equal to or greater than a predetermined rate, and a second determination condition is satisfied, that is, a rate at which the clipping signal is equal to or less than a second lower threshold value that is larger than the first lower threshold value, during the predetermined period, is equal to or greater than a predetermined rate. The output unit may be configured to output a signal indicating that the energy device is driven when the determination unit determines that the first determination condition and the second determination condition are satisfied.

[0047] A drive detection system according to a third aspect of the present disclosure may be configured in the first or second aspect, wherein the amplifier circuit amplifies the amplitude of the electromagnetic waves acquired by the antenna by ten times or more.

[0048] The drive detection system according to aspect 4 of the present disclosure may be configured such that, in aspect 2 or 3, the judgment unit determines, as the first judgment condition, whether the proportion of the clipping signals that are equal to or greater than the second upper threshold is 30% or more, and determines, as the second judgment condition, whether the proportion of the clipping signals that are equal to or less than the second lower threshold is 30% or more.

[0049] A drive detection system according to aspect 5 of the present disclosure may be configured such that, in any of aspects 2 to 4, when the first range is from the first lower threshold to the first upper threshold, the second upper threshold is 10% smaller than the first upper threshold in the first range, and the second lower threshold is 10% larger than the first lower threshold in the first range.

[0050] A surgical system according to a sixth aspect of the present disclosure includes an energy device, the actuation detection system according to any one of the first to fifth aspects, and a smoke exhaust device that exhausts smoke generated by actuation of the energy device to the outside. The smoke exhaust device exhausts smoke when the actuation detection system detects actuation of the energy device.

[0051] A surgical system according to aspect 7 of the present disclosure may be configured in the above-described aspect 6 such that the energy device has a plurality of output modes that output different energy patterns.

[0052] A surgical system according to aspect 8 of the present disclosure may be configured in the above-described aspect 6 such that the electromagnetic waves generated from the energy device are composite waves including multiple frequencies.

[0053] A surgical system according to aspect 9 of the present disclosure may be configured in any of aspects 6 to 8, wherein the antenna is positioned in close proximity to at least a portion of a drive cable for driving the energy device.

[0054] A drive detection method according to aspect 10 of the present disclosure acquires electromagnetic waves generated from an energy device, amplifies the amplitude of the acquired electromagnetic waves, generates a clipping signal by clipping the amplitude of the amplified signal using a predetermined first upper threshold and a first lower threshold, and outputs a signal indicating the drive of the energy device based on the clipping signal.

[0055] The present disclosure is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present disclosure.

[0056] 2A, 2B Trocar 10 Drive detection system 11 Connection cable 20 Sensor unit 21 Antenna 22 First clipping circuit 23 Amplification circuit 24 Second clipping circuit 30 Control unit 31 Determination unit 32 Output unit 40 Energy device 43 Cable 50 Smoke exhaust device 100 Surgery system LT1 First lower threshold LT2 Second lower threshold UT1 First upper threshold UT2 Second upper threshold

Claims

1. a sensor unit including an antenna for acquiring an electromagnetic wave generated from an energy device, an amplifier circuit for amplifying the amplitude of the electromagnetic wave acquired by the antenna, and a clipping circuit for outputting a clipped signal obtained by clipping the amplitude of the signal amplified by the amplifier circuit using a first upper threshold and a first lower threshold that are predetermined; A control unit, The control unit has an output unit that outputs a signal indicating operation of the energy device based on the clipping signal. Drive detection system.

2. the control unit further includes a determination unit configured to determine whether a first determination condition is satisfied, that is, a rate at which the clipping signal is equal to or greater than a second upper threshold value that is smaller than the first upper threshold value during a predetermined period is equal to or greater than a predetermined rate, and a second determination condition is satisfied, that is, a rate at which the clipping signal is equal to or less than a second lower threshold value that is larger than the first lower threshold value during the period is equal to or greater than a predetermined rate, the output unit outputs a signal indicating that the energy device is operating when the determination unit determines that the first determination condition and the second determination condition are satisfied. The drive sensing system of claim 1 .

3. The drive detection system according to claim 2 , wherein the amplifier circuit amplifies the amplitude of the electromagnetic wave acquired by the antenna by a factor of ten or more.

4. 3. The drive detection system of claim 2, wherein the determination unit determines, as the first determination condition, whether a proportion of the clipping signals that are equal to or greater than the second upper threshold is 30% or more, and determines, as the second determination condition, whether a proportion of the clipping signals that are equal to or less than the second lower threshold is 30% or more.

5. 3. The drive detection system according to claim 2, wherein, when a first range is defined as a range from the first lower threshold to the first upper threshold, the second upper threshold is a value that is 10% smaller than the first upper threshold in the first range, and the second lower threshold is a value that is 10% larger than the first lower threshold in the first range.

6. Energy devices, A driving detection system according to any one of claims 1 to 5; a smoke exhaust device that exhausts smoke generated by the operation of the energy device to the outside, A surgical system in which the smoke exhaust device exhausts smoke when the drive detection system detects the drive of the energy device.

7. The surgical system according to claim 6 , wherein the energy device has a plurality of output modes each having a different output energy pattern.

8. The surgical system according to claim 6 , wherein the electromagnetic wave generated from the energy device is a composite wave including a plurality of frequencies.

9. The surgical system of claim 6 , wherein the antenna is positioned adjacent to at least a portion of a drive cable for driving the energy device.

10. Electromagnetic waves generated by energy devices are collected, Amplifying the amplitude of the acquired electromagnetic wave; generating a clipped signal by clipping the amplitude of the amplified signal with a first upper threshold and a first lower threshold that are predetermined; A drive detection method that outputs a signal indicating drive of the energy device based on the clipping signal.