Endoscope system

Abstract

An endoscope system (1) includes an air supply device (15) for delivering carbon dioxide gas and a light source device (14) equipped with an air pump (14a) for supplying air, and when an air supply / water supply button (22c) provided on the endoscope (11) is operated, carbon dioxide gas or air gas is output from the front end of the endoscope (11). The endoscope system (1) includes: a pressure gauge (45) provided inside the air supply device (15) for detecting the pressure of carbon dioxide gas; and a control unit (12A) for controlling the air supply by the air pump (14a) to stop when it is determined that the pressure of the gas detected by the pressure gauge (45) exceeds a predetermined threshold value TH.

Description

Technical Field

[0001] The present invention relates to an endoscope system having a gas supply device for delivering carbon dioxide gas and an air supply device for supplying air. Background Art

[0002] When using an endoscope for inspection or treatment, in order to ensure the field of view of the endoscope and the operating area of ​​the treatment instrument, gas is supplied into the body cavity from the gas supply pipeline provided in the endoscope. As the gas delivered into the body cavity, air or carbon dioxide gas is used. Carbon dioxide gas has the following advantages over air: Carbon dioxide gas has good bioabsorption, so the patient is not likely to feel bloated.

[0003] Generally, when sending air into a body cavity, an air pump provided in a light source device is used. When sending carbon dioxide gas into a body cavity, a gas sending device equipped with a gas tank filled with carbon dioxide gas is used.

[0004] In addition, there is a system in which an endoscope system includes both a light source device and a gas supply device, and a surgeon can select either air or carbon dioxide gas to use. In such an endoscope system, when both air and carbon dioxide gas are delivered at the same time, the amount of gas supplied to the body cavity becomes excessive, so the surgeon must select the gas to be used and switch the gas to be delivered.

[0005] To switch the gas to be used, a gas supply start or stop button for air and a gas supply start or stop button for carbon dioxide gas must be operated, and these operations become a burden for the surgeon.

[0006] Japanese Patent Gazette No. 5611637 discloses a medical air supply system in which, when the control unit detects that an operation button of an air supply device has been operated, the control unit switches the air pump of a light source device that was previously operating to a non-operating state, thereby alleviating the burden of such switching operation on the operator.

[0007] However, in such a medical gas supply system, there is a concern that gas will not be supplied into the body cavity when the air pump of the light source device is set to an inoperative state when the gas tank is not sufficiently filled with carbon dioxide gas or the valve of the gas tank is in a closed state.

[0008] Therefore, an object of the present invention is to provide an endoscope system that can reduce the burden on an operator and reliably supply carbon dioxide gas into a body cavity. Summary of the invention

[0009] Solutions for solving problems

[0010] An endoscope system according to one embodiment of the present invention comprises an air supply device for delivering carbon dioxide gas and an air supply device for supplying air. When a specified operating member provided on the endoscope is operated, the carbon dioxide gas or the air gas is output from the front end of the endoscope. The endoscope system further comprises: a gas state detection unit provided inside the air supply device for detecting the state of the carbon dioxide gas; and a control unit for controlling the air supply device to stop delivering the air when it is determined that the state of the gas detected by the gas state detection unit exceeds a specified threshold value. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a block diagram of a medical system according to the first embodiment of the present invention.

[0012] Figure 2 This is a block diagram showing the connection relationship of signal lines among a system controller, a light source device, and an air supply device constituting the endoscope system according to the first embodiment of the present invention.

[0013] Figure 3 It is a block diagram showing the structure of the air supply device according to the first embodiment of the present invention.

[0014] Figure 4 This is a flowchart showing an example of a flow of stop control of the air pump in the control unit of the system controller according to the first embodiment of the present invention.

[0015] Figure 5 This is a graph showing changes in the state of a power switch of the air supply device, the state of a flow rate regulating valve, and the pressure detected by the pressure gauge according to the first embodiment of the present invention.

[0016] Figure 6 This is a graph showing changes in the state of a power switch of the air supply device, the state of the air supply switch, the state of the flow rate regulating valve, and the pressure detected by the pressure gauge according to the first embodiment of the present invention.

[0017] Figure 7 This is a graph showing changes in the state of a power switch of the air supply device, the state of a flow rate regulating valve, the state of an air supply / water supply button, and the pressure detected by a pressure gauge according to Modification 1 of the first embodiment of the present invention.

[0018] Figure 8 This is a graph showing changes in the state of a power switch of the air supply device, the state of a flow rate regulating valve, the state of an air supply / water supply button, and the pressure detected by a pressure gauge according to Modification 1 of the first embodiment of the present invention.

[0019] Fig. 9It is a graph showing the state of the power switch of the air supply device, the state of the air supply switch, the state of the flow regulating valve, the state of the air supply / water supply button, and the change in the pressure detected by the pressure gauge involved in the modification example 2 of the first embodiment of the present invention.

[0020] Fig.10 It is a graph showing the state of the power switch of the air supply device, the state of the air supply switch, the state of the flow regulating valve, the state of the air supply / water supply button, and the change in the pressure detected by the pressure gauge involved in the modification example 2 of the first embodiment of the present invention.

[0021] Fig.11 It is a block diagram showing the structure of an air supply device according to a second embodiment of the present invention.

[0022] Fig.12 The graph shows changes in the state of a power switch of the air supply device, the state of a flow rate regulating valve, the state of an air supply / water supply button, and a flow rate detected by a flow meter according to the second embodiment of the present invention.

[0023] Fig.13 This is a graph showing changes in the state of a power switch of an air supply device, the state of a flow rate regulating valve, the state of an air supply / water supply button, and a flow rate detected by a flow meter according to the second embodiment of the present invention.

[0024] Fig.14 It is a block diagram showing the configuration of an air supply device according to a third embodiment of the present invention.

[0025] Fig.15 This is a graph showing the state of a power switch of an air supply device, the state of a flow rate regulating valve, the state of an air supply / water supply button, and changes in the carbon dioxide gas concentration obtained by a carbon dioxide gas concentration meter according to the third embodiment of the present invention. DETAILED DESCRIPTION

[0026] Hereinafter, embodiments of the present invention will be described using the drawings.

[0027] (First Embodiment)

[0028] Figure 1 1 is a block diagram of a medical system according to the first embodiment. A medical system 1 is a system for inspecting or treating a subject 4 as a patient on a bed 3 using an endoscope system 2 .

[0029] The endoscope system 2 includes an endoscope 11 , a system controller 12 , a camera control unit 13 , a light source device 14 , a gas supply device 15 , a monitor 16 , and a carbon dioxide gas tank 17 .

[0030] The system controller 12, the camera control unit 13, the light source device 14, the air supply device 15, and the monitor 16 are mounted on a cart 18 as a mounting table. The carbon dioxide gas tank 17 is mounted on an extension portion 18a extending from the cart 18. The carbon dioxide gas tank 17 is connected to the air supply device 15 via a connecting pipe 17a.

[0031] The endoscope 11 includes an elongated insertion portion 21, an operation portion 22 connected to the base end of the insertion portion 21, a universal cable 23 extending from the operation portion 22, and a connector 24 provided at the front end of the universal cable 23. The connector 24 includes a cable 24a connected to the camera control unit 13 and an air supply tube 24b connected to the air supply device 15.

[0032] An observation window and an illumination window (not shown) are provided at the front end of the insertion portion 21 of the endoscope 11. An imaging element such as a CMOS image sensor is provided on the rear side of the observation window. Light from the subject incident through the observation window is imaged on the imaging surface of the imaging element. The imaging element performs photoelectric conversion on the image inside the subject imaged on the imaging surface to output an imaging signal. The imaging signal is supplied to the camera control unit 13 via a signal line inserted into the insertion portion 21, the operating portion 22, the universal cable 23, and the cable 24a. The camera control unit 13 generates an endoscopic image based on the received imaging signal and outputs the endoscopic image to the monitor 16.

[0033] The front end surface of a slender light guide (not shown) is provided on the rear side of the lighting window at the front end of the insertion portion 21. The light guide is inserted through the insertion portion 21, the operation portion 22 and the universal cable 23. The base end surface of the slender light guide is arranged near the light source in the light source device 14 by means of a connector 24. Therefore, the light of the light source of the light source device 14 passes through the light guide and is emitted from the front end of the insertion portion 21, thereby illuminating the inside of the subject. The reflected light of the illumination light is received by the imaging element. The surgical operator can view the endoscopic image displayed on the monitor 16 to perform the desired inspection or treatment.

[0034] The system controller 12 controls the operation of the entire endoscope system 2 and various devices connected to the camera control unit 13 and the like. The system controller 12 is connected to the camera control unit 13 via a signal cable (not shown).

[0035] The camera control unit 13 is connected to the monitor 16 via a cable (not shown). The camera control unit 13 generates an endoscopic image and outputs an image signal of the endoscopic image to the monitor 16. The system controller 12 is connected to the light source device 14 and the air supply device 15 via a plurality of signal lines described below.

[0036] The light source device 14 includes an air pump 14a, and air from the air pump 14a can be supplied to the air supply passage 23a in the universal cord 23 through an air flow path 24c (indicated by dotted lines) provided in the connector 24. The light source device 14 constitutes an air supply device for supplying air.

[0037] The gas supply device 15 discharges the carbon dioxide gas from the carbon dioxide gas tank 17 to the gas supply pipe 24b. The carbon dioxide gas from the gas supply device 15 is supplied to the connector 24 via the gas supply pipe 24b. A gas path is formed in the connector 24 to connect the gas supply pipe 24b with the gas supply passage 23a in the universal cable 23.

[0038] The air supply channel 23a in the universal cable 23 is connected to the air supply path 21a in the insertion part 21 through the operation part 22. A liquid supply path (not shown) is provided in the insertion part 21. The front end of the air supply path 21a is connected to the liquid supply path, and an air supply and liquid supply pipeline is formed at the front end of the insertion part 21. The front end of the air supply and liquid supply pipeline is connected to the nozzle at the front end of the insertion part 21, and gas and liquid can be ejected from the opening 21b of the nozzle.

[0039] The operation part 22 is provided with an air supply / water supply button 22c and a suction button 22d. When the surgical operator blocks the hole provided in the air supply / water supply button 22c, an air supply path of the gas in the operation part 22 is formed, and the air from the light source device 14 or the carbon dioxide gas from the air supply device 15 is supplied to the air supply path 21a. For example, an opening for the inflow of air or carbon dioxide gas is formed in the cylinder provided in the operation part 22. When the surgical operator blocks the hole provided in the air supply / water supply button 22c, the following flow path is formed: the air or carbon dioxide gas passes through the air supply path 21a from the air supply channel 23a and is ejected from the opening 21b of the nozzle at the front end of the insertion part 21.

[0040] In addition, a gas supply / water supply button 22e is sometimes connected instead of the gas supply / water supply button 22c. The gas supply / water supply button 22e can be pressed in two stages. When the gas supply / water supply button 22e is not pressed, the gas stops at the entrance of the gas supply / water supply button 22e. When the gas supply / water supply button 22e is pressed by one stage, gas is supplied, and when the gas supply / water supply button 22e is further pressed and pressed to the second stage, water is supplied.

[0041] In addition, although not described in detail here, when the air / water supply button 22c is pressed, water from the liquid supply path is ejected from the opening 21b of the nozzle at the front end of the insertion part 21, and when the suction button 22d is pressed, suction is performed from the opening 21b of the nozzle at the front end of the insertion part 21.

[0042] As described above, the endoscope system 2 includes the gas supply device 15 for delivering carbon dioxide gas and the light source device 14 as an air supply device for supplying air, and when the gas supply / water supply button 22c as a predetermined operation member provided on the endoscope 11 is operated, carbon dioxide gas or air gas is output from the front end of the endoscope 11. Therefore, the operator can supply gas into the body cavity of the subject by operating the gas supply / water supply button 22c, thereby ensuring the field of view of the endoscope, etc.

[0043] Figure 2 1 is a block diagram showing the connection relationship of the signal lines between the system controller 12, the light source device 14, and the air supply device 15 constituting the endoscope system 1. The system controller 12 and the air supply device 15 are connected by a communication line 31. The system controller 12 and the light source device 14 are connected by a communication line 32. The light source device 14 and the air supply device 15 are connected by a communication line 33. The communication lines 31, 32, and 33 constitute a communication network 34. Here, the communication network 34 is composed of the communication lines 31, 32, and 33 formed in a ring shape, but it can also be a network in other forms such as a bus shape. The system controller 12, the light source device 14, and the air supply device 15 can communicate with each other through the communication network 34.

[0044] The system controller 12 includes a control unit 12A, a storage device 12B, a setting unit 12C, and a communication circuit 35. The communication circuit 35 is connected to the communication lines 31 and 32. As described above, the system controller 12 includes various circuits and devices for controlling the entire endoscope system 1. Figure 2 Omitted in .

[0045] The storage device 12B includes a program storage area 12p for storing various programs and a data storage area 12d for storing various data. The program storage area 12p includes a stop control program 12x described later, which performs stop control of the air pump 14a of the light source device 14. The data storage area 12d includes data of a threshold value TH described later. The threshold value TH can be changed and set by the setting unit 12C. That is, the setting unit 12C constitutes a threshold value setting unit for setting a predetermined threshold value TH regarding the state of the gas. The setting unit 12C is, for example, a setting display including a touch panel device and a display device.

[0046] The control unit 12A can communicate with the light source device 14 and the air supply device 15 via the communication circuit 35. Therefore, the control unit 12A can receive various signals from the light source device 14 and the air supply device 15, and can send control signals to the light source device 14 and the air supply device 15.

[0047] The light source device 14 includes a control unit 14A, a communication circuit 36, and an air pump 14a. The light source device 14 also includes various devices such as a light source and a color filter, but in Figure 2 . When the power switch 14b of the light source device 14 is turned on, the light source device 14 turns on and operates the air pump 14a. As a result, air is sent to the air supply channel 23a. When the surgical operator blocks the hole of the air supply / water supply button 22c in this state, air is sent out from the opening 21b of the nozzle at the front end of the insertion part 21. In addition, in the case where the light source device 14 has an on / off switch that is independent of the power switch 14b and is used to turn on / off the air pump 14a, when the on / off switch is turned on after the power switch 14b is turned on, the air pump 14a is turned on. The control unit 14A can communicate with the system controller 12 and the air supply device 15 via the communication circuit 36.

[0048] The air supply device 15 includes a control unit 15A and a communication circuit 37. The air supply device 15 includes various devices such as a pressure reducer and a sensor as described later, but Figure 2 The control unit 15A can communicate with the system controller 12 and the light source device 14 via the communication circuit 37 .

[0049] The control unit 15A outputs a control signal SS to the flow rate regulating valve 43 for supplying carbon dioxide gas, and transmits a detection signal DS of a sensor for detecting the state of carbon dioxide gas to the system controller 12 via the communication circuit 37 in real time.

[0050] The control unit 12A of the system controller 12 can generate a control signal for controlling the operation of the air pump 14 a based on the received detection signal DS, and transmit the control signal to the light source device 14 .

[0051] Each control unit 12A, 14A, 15A includes a processor. The processor includes a central processing unit (CPU), ROM, RAM, etc., and various functions are realized by reading the programs stored in the ROM and the storage device 12B, expanding them in the RAM, and executing them. In addition, the processor can also be composed of a semiconductor device such as an FPGA (Field Programmable Gate Array) or a circuit such as an electronic circuit.

[0052] Figure 3 1 is a block diagram showing the structure of the gas supply device 15. The gas supply device 15 has a pipe GP to which the carbon dioxide gas from the carbon dioxide gas tank 17 is supplied. The pipe GP is connected to the connecting pipe 17a and the gas supply pipe 24b, and the carbon dioxide gas from the carbon dioxide gas tank 17 is supplied to the gas supply pipe 24b connected to the gas supply pipe head 15b. On the pipe GP, two pressure reducers 41, 42 and a flow regulating valve 43 are provided in order from the connecting pipe 17a side. The gas decompressed by the two pressure reducers 41, 42 is supplied to the flow regulating valve 43.

[0053] A pressure gauge 44 is provided on the pipe GP between the carbon dioxide gas tank 17 and the pressure reducer 41. The pressure gauge 44 detects the pressure of the carbon dioxide gas in the carbon dioxide gas tank 17, and outputs a detection signal DS1 of the detected pressure to the control unit 15A. A pressure gauge 45 is provided between the flow regulating valve 43 and the air supply pipe 24b. That is, the pressure gauge 45 as a gas state detection unit is provided at the rear stage of the flow regulating valve 43 that adjusts the flow rate of the carbon dioxide gas of the air supply device 15. The pressure gauge 45 detects the pressure in the pipe GP1 between the flow regulating valve 43 and the air supply pipe 24b, and outputs a detection signal DS2 of the detected pressure to the control unit 15A. The pressure gauge 45 constitutes a gas state detection unit that is provided inside the air supply device 15 and detects the state of the carbon dioxide gas, here, the pressure.

[0054] The air supply device 15 has a power switch 15a. The control unit 15A is connected to the pressure gauges 44, 45 and the flow regulating valve 43. The control unit 15A detects the on / off state of the power switch 15a. When the power switch 15a is turned on, the control unit 15A controls the flow regulating valve 43 based on the detection signal DS2 of the pressure gauge 45, and supplies carbon dioxide gas from the carbon dioxide gas tank 17 to the air supply pipe 24b. Therefore, carbon dioxide gas is supplied from the air supply device 15 to the air supply pipe 24b.

[0055] In addition, if Figure 3 As shown by the double-dotted line, the air supply device 15 may also include an air supply switch 15c in addition to the power switch 15a. In this case, the air supply device 15 does not supply carbon dioxide gas from the air supply device 15 to the air supply pipe 24b only when the power switch 15a is turned on, but when the air supply switch 15c is further turned on, the flow control valve 43 is opened by the control unit 15A, and carbon dioxide gas is supplied from the air supply device 15 to the air supply pipe 24b.

[0056] (effect)

[0057] Next, the stop control of the air pump in the above-mentioned endoscope system will be described. The stop control of the air pump is performed by the stop control program 12x for performing the stop control of the air pump 14a described above.

[0058] The surgeon turns on the power switches of the devices to be used before performing an examination, etc. When the surgeon wants to send air into the body cavity, the surgeon does not turn on the power switch 15a of the air supply device 15. When the surgeon wants to send carbon dioxide gas into the body cavity instead of sending air, the surgeon turns on the power switch 15a.

[0059] Figure 41 is a flowchart showing an example of the process of stopping the air pump in the control unit 12A. When the power switch 15a of the air supply device 15 is turned on, the control unit 12A executes the stop control program 12x. The control unit 12A detects the state (step (hereinafter abbreviated as S) 1). Detecting the state here means detecting the pressure P in the pipe GP1. S1 is the pressure data of the pressure value detected by the pressure gauge 45 received from the air supply device 15.

[0060] After S1, the control unit 12A determines whether to stop the air pump 14a (S2). The determination of whether to stop the air pump 14a refers to determining whether the pressure P in the pipeline GP1 exceeds a predetermined threshold value TH1. The operator inputs the threshold value TH1 from the setting unit 12C in advance and stores the threshold value TH1 in the data storage area of ​​the storage device 12B to set the threshold value TH1.

[0061] When the power switch 15 a is turned on, the flow regulating valve 43 opens, and thus the pressure P in the pipe GP1 at the downstream side portion of the pipe GP of the flow regulating valve 43 increases.

[0062] Figure 5 It is a graph showing the state of the power switch 15 a of the air supply device 15 , the state of the flow rate regulating valve 43 , and changes in the pressure detected by the pressure gauge 45 . Figure 5 The horizontal axis represents the passage of time. When the power switch 15a is turned on at time t1, the flow control valve 43 is turned on by the control unit 15A. When the flow control valve 43 is opened, the pressure in the pipeline GP1 rises. Figure 5 As shown, the pressure P detected by the pressure gauge 45 increases after time t1.

[0063] The control unit 15A of the air supply device 15 sends the detection value data of the detection signal DS2 to the system controller 12 in real time via the communication circuit 37. Therefore, the control unit 12A of the system controller 12 always monitors the received detection value data. Therefore, in S2, the control unit 15A determines whether the pressure P in the pipe GP1 exceeds the predetermined threshold value TH1 based on the received detection value data.

[0064] If the pressure P detected by the pressure gauge 45 exceeds the threshold value TH1, the control unit 12A instructs the air pump 14a to stop (S3). That is, the control unit 12A sends an operation stop command to the light source device 14 to stop the operation of the air pump 14a. Figure 5 At time t2, the pressure P in the pipe GP1 exceeds the predetermined threshold TH1. Since the pressure P exceeds the predetermined threshold TH1, the control unit 12A sends an operation stop command to stop the operation of the air pump 14a from the communication circuit 35 to the light source device 14 via the communication line 32.

[0065] When receiving the stop command, the control unit 14A of the light source device 14 outputs a disconnection signal to the air pump 14a to stop the operation of the air pump 14a. As described above, when the control unit 12A determines that the state of the carbon dioxide gas detected by the pressure gauge 45, in this case the pressure exceeds the predetermined threshold value TH1, the air pump 14a constituting the air supply device stops sending air.

[0066] In addition, when the air supply device 15 has an air supply switch 15c, the control unit 12A may send a work stop command to stop the operation of the air pump 14a to the light source device 14 if the air supply switch 15c is turned on and the pressure P detected by the pressure gauge 45 exceeds the threshold value TH1. When the light source device 14 receives the work stop command, it stops the operation of the air pump 14a. That is, when the pressure of the state of carbon dioxide gas exceeds the predetermined threshold value TH1 and the air supply switch 15c of the air supply device 15 is turned on, the control unit 12A controls the air pump 14a to stop delivering air.

[0067] And further, if the light source device 14 has an on / off switch for turning on / off the air pump 14a, the control unit 14A stops the operation of the air pump 14a when the air pump 14a is operating when the operation stop command is received. When the air pump 14a is not operating when the operation stop command is received, the control unit 14A does nothing.

[0068] However, it is also possible that, when the air pump 14a is not working when the work stop command is received, the control unit 14A is set to the following prohibited working state: even if the on / off switch is turned on later, the air pump 14a is not operated. That is, the light source device 14 is in a state that does not accept the turning on of the on / off switch. For example, the light source device 14 is internally provided with flag information indicating the prohibited working state. It is also possible that, when the light source device 14 is in the prohibited working state, the surgical operator is caused to perform an operation for confirming that the air pump 14a is to be operated, so that the surgical operator can change the air pump 14a from the prohibited working state to the operable state in case the concentration of carbon dioxide gas in the patient's blood increases, etc.

[0069] Figure 6 It is a graph showing the state of the power switch 15 a of the air supply device 15 , the state of the air supply switch 15 c , the state of the flow rate regulating valve 43 , and changes in the pressure detected by the pressure gauge 45 . Figure 6 The horizontal axis represents the passage of time. When the power switch 15a is turned on at time t11 and the air supply switch 15c is turned on at time t12, the flow control valve 43 is turned on by the control unit 15A. When the flow control valve 43 is opened, the pressure in the pipeline GP1 rises. Figure 6 As shown, the pressure P detected by the pressure gauge 45 increases after time t13.

[0070] The control unit 12A can communicate with the air supply device 15 to acquire the state information of the air supply switch 15 c through communication, thereby determining that the air supply switch 15 c of the air supply device 15 is turned on.

[0071] As described above, at the timing of time t2 (or t13) when the pressure P exceeds the predetermined threshold value TH1, the control unit 12A executes the process of stopping the operation of the air pump 14a.

[0072] In addition, here, the control unit 12A of the system controller 12 receives the detection signal from the pressure gauge 45 of the air supply device 15 and sends a work stop command to the light source device 14 to stop the operation of the air pump 14a, but the control unit 15A of the air supply device 15 can also send the work stop command directly to the light source device 14.

[0073] Furthermore, the control unit 14A of the light source device 14 may receive the detection value data from the pressure gauge 45 of the air supply device 15, determine whether the detection value data exceeds the threshold value TH1, and stop the operation of the air pump 14a.

[0074] The processing of sending the detection value data of the pressure detected by the pressure gauge 45 in the air supply device 15 is executed by software processing or hardware circuit in the control unit 15A. The processing of monitoring the pressure of the pressure gauge 45 in the system controller 12 and the processing of sending the operation stop command of the air pump 14a are also executed by software processing or hardware circuit in the control unit 15A.

[0075] As described above, the operator turns on the power switch 15a to use carbon dioxide gas when supplying gas into the body cavity, and when the pressure P of the pressure gauge 45 exceeds the predetermined threshold value TH1, the operation of the air pump 14a of the light source device 14 is stopped. Therefore, the amount of gas supplied into the body cavity does not become excessive.

[0076] Normally, the pressure in pipeline GP1 of pipeline GP rises due to the carbon dioxide gas from the gas supply device 15, but if there is not enough gas remaining in the carbon dioxide gas tank 17 or the valve provided at the gas outlet of the carbon dioxide gas tank 17 is closed, the pressure of the pressure gauge 45 will not rise appropriately.

[0077] That is, according to the above-described embodiment, even if the power switch 15a of the air supply device 15 is turned on, the operation of the air pump 14a will not be stopped unless sufficient carbon dioxide gas is actually ejected.

[0078] (Variant 1)

[0079] In the above-mentioned embodiment, when the flow regulating valve 43 is opened and the pressure P in the pipe GP1 exceeds the threshold value TH1, the control unit 12A immediately sends a work stop command to the light source device 14, but it may also be that when the pressure P exceeds the threshold value TH1 and then becomes below the threshold value TH1, or when the pressure P exceeds the threshold value TH1 and then becomes above the threshold value TH1', the control unit 12A outputs a work stop command to the light source device 14 to stop the air pump 14a from delivering air.

[0080] Figure 7 The graph shows the state of the power switch 15 a of the air supply device 15 , the state of the flow rate regulating valve 43 , the state of the air supply / water supply button 22 e , and changes in the pressure detected by the pressure gauge 45 . Figure 7 The horizontal axis represents the passage of time. When the flow control valve 43 is opened, the pressure in the pipeline GP1 rises. Figure 7 As shown in FIG. 1 , the pressure P detected by the pressure gauge 45 exceeds the threshold value TH1 at time t21. Thereafter, when the surgeon operates the gas / water supply button 22e, for example, by pressing the gas / water supply button 22e to the first level, carbon dioxide gas is ejected from the opening 21b of the nozzle at the front end of the insertion portion 21. As a result, the pressure P in the pipeline GP1 drops below the threshold value TH1. Figure 7 At time t22, the timing pressure P becomes equal to or less than the threshold value TH1.

[0081] That is, in this modification 1, if the pressure P detected by the pressure gauge 45 exceeds the threshold value TH1, and then the pressure P detected by the pressure gauge 45 becomes below the threshold value TH1, the control unit 12A sends a work stop command to stop the operation of the air pump 14a to the light source device 14. According to this modification 1, the same effect as the above-mentioned embodiment is also produced.

[0082] The case of using the air / water supply button 22c will be described. Figure 8 The graph shows the state of the power switch 15 a of the air supply device 15 , the state of the flow rate regulating valve 43 , the state of the air supply / water supply button 22 c , and changes in the pressure detected by the pressure gauge 45 . Figure 8 The horizontal axis represents the passage of time. When the flow control valve 43 is opened, the pressure in the pipeline GP1 rises. Figure 8As shown, the pressure P detected by the pressure gauge 45 exceeds the threshold value TH1a at time t21'. Thereafter, when the surgeon operates the air / water supply button 22c, for example, by blocking the hole of the air / water supply button 22c, carbon dioxide gas is ejected from the opening 21b of the nozzle at the front end of the insertion portion 21. As a result, the pressure P in the pipeline GP1 rises to the threshold value TH1b. This is because the inner diameter of the endoscope pipeline 21a located downstream of the air / water supply button is thinner than the hole of the air / water supply button 22c, resulting in a higher flow resistance. Figure 8 At time t22', the timing pressure P becomes equal to or greater than the threshold value TH1b.

[0083] That is, in Figure 8 In the present modification example 1 shown, if the pressure P detected by the pressure gauge 45 exceeds the threshold value TH1a, and then the pressure P detected by the pressure gauge 45 becomes greater than the threshold value TH1b, the control unit 12A sends a work stop command to stop the operation of the air pump 14a to the light source device 14. According to the present modification example 1, the same effect as the above-mentioned embodiment is also produced.

[0084] (Variant 2)

[0085] In the above-mentioned variant example 1, if the pressure P detected by the pressure gauge 45 exceeds the threshold value TH1 and then the pressure P detected by the pressure gauge 45 becomes below the threshold value TH1, or if the pressure P exceeds the threshold value TH1a and then the pressure P becomes above the threshold value TH1b, the control unit 12A sends a work stop command to the light source device 14 to stop the operation of the air pump 14a. However, it may also be that if the above-mentioned air supply switch 15c is turned on, and the pressure P detected by the pressure gauge 45 exceeds the threshold value TH1 and then the pressure P detected by the pressure gauge 45 becomes below the threshold value TH1 or becomes above the threshold value TH1b, the control unit 12A sends a work stop command to stop the operation of the air pump 14a.

[0086] Fig. 9 It is a graph showing the state of the power switch 15a of the air supply device 15, the state of the air supply switch 15c, the state of the flow control valve 43, the state of the air supply / water supply button 22e, and changes in the pressure detected by the pressure gauge 45. Fig. 9 The horizontal axis represents the passage of time. When the power switch 15a is turned on at time t31 and the air supply switch 15c is turned on at time t32, the flow control valve 43 is opened by the control unit 15A. When the flow control valve 43 is opened, the pressure P in the pipeline GP1 rises. Fig. 9 As shown, the pressure P detected by the pressure gauge 45 increases after time t32, and the pressure P in the pipe GP1 exceeds the threshold value TH1.

[0087] Then, when the gas / water supply button 22e is pressed to the first level, gas is delivered from the opening 21b of the nozzle at the front end of the insertion portion 21. As a result, the pressure P in the pipe GP1 drops below the threshold value TH1. Fig. 9 In the embodiment, the timing pressure P at time t34 becomes equal to or less than the threshold value TH1. According to the second modification, the same effects as those of the above-mentioned embodiment are also produced.

[0088] The case of using the air / water supply button 22c will be described. Fig.10 It is a graph showing the state of the power switch 15a of the air supply device 15, the state of the air supply switch 15c, the state of the flow control valve 43, the state of the air supply / water supply button 22c, and changes in the pressure detected by the pressure gauge 45. Fig.10 The horizontal axis represents the passage of time. When the power switch 15a is turned on at time t31' and the air supply switch 15c is turned on at time t32', the flow control valve 43 is opened by the control unit 15A. When the flow control valve 43 is opened, the pressure P in the pipeline GP1 rises. Fig.10 As shown, the pressure P detected by the pressure gauge 45 increases after time t32', and the pressure P in the pipe GP1 exceeds the threshold value TH1a.

[0089] Then, when the air / water supply button 22c is pressed to the first level, air is supplied from the opening 21b of the nozzle at the front end of the insertion portion 21. As a result, the pressure P in the pipe GP1 rises to a value higher than the threshold value TH1b. Fig.10 In the embodiment, the timing pressure P at the time t34' becomes equal to or greater than the threshold value TH1b. According to the second modification, the same effects as those of the above-described embodiment are also produced.

[0090] As described above, according to the above-described embodiment and each modified example, it is possible to provide an endoscope system that can reduce the burden on the operator and reliably supply carbon dioxide gas into the body cavity.

[0091] (Second Embodiment)

[0092] In the first embodiment, the pressure in the pipe GP1 downstream of the flow regulating valve 43 is detected to stop the operation of the air pump 14a of the light source device 14, but in the second embodiment, the flow rate of the gas flowing through the pipe GP is detected to stop the operation of the air pump 14a of the light source device 14.

[0093] The structure of the medical system of this embodiment is similar to Figure 1 and Figure 2 The medical system 1 of the first embodiment shown has substantially the same configuration, and therefore the same components are described using the same reference numerals, and detailed descriptions thereof are omitted.

[0094] Fig.11 The air supply device 15 of the second embodiment is a block diagram showing the structure of the air supply device 15. The air supply device 15 has substantially the same structure as the air supply device 15 of the first embodiment, so the same components are denoted by the same reference numerals and description thereof is omitted, and only different components are described.

[0095] A flow meter 51 is provided in the pipeline GP1. The flow meter 51 detects the flow rate of the gas flowing through the pipeline GP1, and outputs a flow rate detection signal DS11 as the state of the detected gas to the control unit 15A. That is, the flow meter 51 constitutes a gas state detection unit provided inside the air supply device 15 and detecting the state of the carbon dioxide gas, here the flow rate. The flow meter 51 as the gas state detection unit is provided at the subsequent stage of the flow regulating valve 43 that adjusts the flow rate of the carbon dioxide gas of the air supply device 15.

[0096] The detection signal DS11 is sent from the control unit 15A to the control unit 12A. The control unit 12A executes based on the flow data received in real time. Figure 4 Stop control of the air pump shown.

[0097] Fig.12 The graph shows the state of the power switch 15 a of the air supply device 15 , the state of the flow rate regulating valve 43 , the state of the air supply / water supply button 22 e , and changes in the flow rate detected by the flow meter 51 . Fig.12 The horizontal axis represents the passage of time. When the power switch 15a is turned on at time t41, the flow regulating valve 43 is opened by the control unit 15A.

[0098] When the gas / water supply button 22e is operated at time t42 to supply gas after the flow control valve 43 is opened, carbon dioxide gas flows in the pipe GP1. Fig.12 As shown, the flow rate Q of the carbon dioxide gas detected by the flow meter 51 increases after time t42.

[0099] The control unit 15A of the air supply device 15 transmits the detection value data of the detection signal DS11 to the system controller 12 in real time via the communication circuit 37. Therefore, the control unit 12A of the system controller 12 always monitors the received detection value data.

[0100] Therefore, in S2, the control unit 12A determines whether the flow rate Q of the carbon dioxide gas in the pipeline GP1 exceeds a predetermined threshold value TH2 based on the received detection value data. The threshold value TH2 is a flow value at which it is possible to determine that a certain level of carbon dioxide gas flow occurs after the gas supply / water supply button 22e is pressed to the first level to start gas supply. The operator sets the threshold value TH2 by inputting the threshold value TH2 from the setting unit 12C in advance and storing the threshold value TH2 in the data storage area of ​​the storage device 12B.

[0101] The control unit 12A determines whether the flow rate Q of the carbon dioxide gas in the pipeline GP1 exceeds the predetermined threshold value TH2 based on the received detection value data. When the flow rate Q of the carbon dioxide gas exceeds the predetermined threshold value TH2, the control unit 12A sends a work stop command to the light source device 14 to stop the operation of the air pump 14a. Fig.12 In the timing of time t43, the flow rate Q of the carbon dioxide gas in the pipeline GP1 exceeds the predetermined threshold value TH2. When the light source device 14 receives the work stop command, it stops the operation of the air pump 14a. As described above, when the control unit 12A determines that the state of the carbon dioxide gas detected by the flow meter 51, in this case, the flow rate exceeds the predetermined threshold value TH2, it controls the air pump 14a to stop sending air.

[0102] The case of using the air / water supply button 22c will be described. Fig.13 The graph shows the state of the power switch 15 a of the air supply device 15 , the state of the flow rate regulating valve 43 , the state of the air supply / water supply button 22 c , and changes in the flow rate detected by the flow meter 51 . Fig.13 The horizontal axis represents the passage of time. When the power switch 15a is turned on at time t41', the flow regulating valve 43 is opened by the control unit 15A. As a result, the flow leaks out from the hole of the air supply / water supply button, so the flow starts to increase at time t41' and stabilizes to a fixed value after a certain amount of time.

[0103] When the air supply / water supply button 22c is operated at time t42' to supply air after the flow regulating valve 43 is opened, the flow rate of the carbon dioxide gas flowing in the pipe GP1 decreases. Fig.13 As shown, the flow rate Q of the carbon dioxide gas detected by the flow meter 51 decreases to be less than the threshold value TH2a after time t42'.

[0104] The control unit 15A of the air supply device 15 transmits the detection value data of the detection signal DS11 to the system controller 12 in real time via the communication circuit 37. Therefore, the control unit 12A of the system controller 12 always monitors the received detection value data.

[0105] Therefore, in S2, the control unit 12A determines whether the flow rate Q of the carbon dioxide gas in the pipeline GP1 exceeds the predetermined threshold value TH2a and then decreases to less than the threshold value TH2a based on the received detection value data. The threshold value TH2a is a flow value at a level that can determine the following situation: a certain level of carbon dioxide gas flow occurs after the start of gas supply. The operator inputs the threshold value TH2a from the setting unit 12C in advance, and stores the threshold value TH2a in the data storage area of ​​the storage device 12B to set the threshold value TH2a.

[0106] The control unit 12A determines whether the flow rate Q of the carbon dioxide gas in the pipeline GP1 exceeds the specified threshold value TH2a and then decreases to less than the threshold value TH2a based on the received detection value data. When it is detected that the flow rate Q of the carbon dioxide gas exceeds the specified threshold value TH2a and then decreases to less than the threshold value TH2a, a work stop command is sent to the light source device 14 to stop the operation of the air pump 14a. Fig.13 In the timing after time t41', the flow rate Q of the carbon dioxide gas in the pipe GP1 exceeds the prescribed threshold value TH2a, and the flow rate Q of the carbon dioxide gas in the pipe GP1 drops below the prescribed threshold value TH2a at the timing after time t42'. When the light source device 14 receives the work stop command, it stops the operation of the air pump 14a. As described above, when the control unit 12A determines that the state of the gas detected by the flow meter 51, in this case, the flow rate, has dropped below the prescribed threshold value TH2a after exceeding the prescribed threshold value TH2a, it controls the air pump 14a to stop delivering air.

[0107] In addition, if the light source device 14 has an on / off switch for turning on / off the air pump 14a, the control unit 14A stops the operation of the air pump 14a when the air pump 14a is working when the operation stop command is received. When the air pump 14a is not working when the operation stop command is received, the control unit 14A does nothing.

[0108] In addition, in this embodiment, similarly to the first embodiment, when the air pump 14a does not work when the work stop command is received, the control unit 14A is set to the following prohibited working state: even if the on / off switch is turned on later, the air pump 14a is not operated. That is, the light source device 14 is in a state of not accepting the turning on of the on / off switch. Moreover, when the light source device 14 is in the prohibited working state, the surgical operator is allowed to perform an operation for confirming that the air pump 14a is to be operated, so that the surgical operator can change the air pump 14a from the prohibited working state to the operable state in case the concentration of carbon dioxide gas in the patient's blood increases, etc.

[0109] As described above, according to the above-described embodiment and each modified example, it is possible to provide an endoscope system that can reduce the burden on the operator and reliably supply carbon dioxide gas into the body cavity.

[0110] In addition, in this embodiment, the control unit 12A also receives the detection signal from the flow meter 51 of the air supply device 15 and sends a stop signal to the light source device 14 to stop the operation of the air pump 14a, but the control unit 15A of the air supply device 15 can also send a stop signal directly to the light source device 14.

[0111] Furthermore, the control unit 14A of the light source device 14 may receive the detection value data from the flow meter 51 of the air supply device 15, determine whether the detection value data exceeds the threshold value TH2, and stop the operation of the air pump 14a.

[0112] In addition, in the case of this embodiment, the following situation is detected: after the surgeon turns on the power switch 15a (or the gas supply switch) of the gas supply device 15, the gas supply / water supply button 22c is operated, so that the carbon dioxide gas actually flows, and the flow rate Q of the carbon dioxide gas actually exceeds the predetermined threshold value TH2. If the valve of the carbon dioxide gas tank 17 is closed or the remaining amount of the carbon dioxide gas tank 17 is small, the carbon dioxide gas does not flow to the pipeline GP1. In this case, the air pump 14a is not stopped, so it does not hinder the surgeon's field of view, and the surgeon can continue to perform the examination, etc.

[0113] In addition, in this embodiment, as in the first embodiment or the modification 1, if the power switch 15a or the air supply switch 15c is turned on and the flow rate Q detected by the flow meter 51 exceeds the threshold value TH2, the control unit 12A may send a work stop command to stop the operation of the air pump 14a. That is, when the state of carbon dioxide gas, in this case, the flow rate exceeds the predetermined threshold value TH2 and the air supply switch 15c of the air supply device 15 is turned on, the control unit 12A controls the air pump 14a to stop sending air. The control unit 12A can communicate with the air supply device 15 and determine whether the power switch 15a or the air supply switch 15c of the air supply device 15 has become turned on based on whether the communication is possible. The control unit 12A can communicate with the air supply device 15 to obtain the state information of the air supply switch 15c through communication, thereby determining that the air supply switch 15c of the air supply device 15 has been turned on.

[0114] (Third Embodiment)

[0115] In the first embodiment, the pressure in the pipe GP1 downstream of the flow regulating valve 43 is detected to stop the operation of the air pump 14a of the light source device 14, but in the third embodiment, the concentration of carbon dioxide gas flowing through the pipe GP1 is detected to stop the operation of the air pump 14a of the light source device 14.

[0116] The structure of the medical system of this embodiment is similar to Figure 1 and Figure 2 The medical system 1 of the first embodiment shown has substantially the same configuration, and therefore the same components are described using the same reference numerals, and detailed descriptions thereof are omitted.

[0117] Fig.14 The air supply device 15 of the third embodiment is a block diagram showing the structure of the air supply device 15. The structure of the air supply device 15 is substantially the same as that of the first embodiment, so the same components are denoted by the same reference numerals and the description thereof is omitted, and only the different components are described.

[0118] A carbon dioxide concentration meter 61 is provided in the pipeline GP1. The carbon dioxide concentration meter 61 detects the carbon dioxide concentration of the gas flowing through the pipeline GP1, and outputs a detection signal DS21 of the carbon dioxide concentration as the state of the detected gas to the control unit 15A. That is, the carbon dioxide concentration meter 61 constitutes a gas state detection unit provided inside the air supply device 15 and detecting the state of the carbon dioxide gas, here, the carbon dioxide concentration. The carbon dioxide concentration meter 61 as a gas state detection unit is provided at the subsequent stage of the flow control valve 43 that adjusts the flow rate of the carbon dioxide gas in the air supply device 15.

[0119] The detection signal DS21 is sent from the control unit 15A to the control unit 12A. The control unit 12A executes based on the carbon dioxide gas concentration data received in real time. Figure 4 Stop control of the air pump shown.

[0120] Fig.15 It is a graph showing the state of the power switch 15a of the air supply device 15, the state of the flow control valve 43, the state of the air supply / water supply button 22c (or the air supply / water supply button 22e), and the change in the carbon dioxide gas concentration obtained by the carbon dioxide gas concentration meter 61. Fig.15 The horizontal axis represents the passage of time. When the power switch 15a is turned on at time t51, the flow regulating valve 43 is opened by the control unit 15A.

[0121] After the flow control valve 43 is opened, the carbon dioxide gas flows in the pipe GP1 regardless of the operation of the air supply / water supply button 22c. Fig.15As shown, the carbon dioxide concentration D detected by the carbon dioxide concentration meter 61 increases after time t51. As a result, the flow rate leaks from the hole of the air / water supply button 22c, so the carbon dioxide concentration D starts to rise at time t51, and after a certain period of time, it stabilizes to a fixed value exceeding the threshold value TH3.

[0122] The control unit 15A of the air supply device 15 transmits the detection value data of the detection signal DS21 to the system controller 12 in real time via the communication circuit 37. Therefore, the control unit 12A of the system controller 12 always monitors the received detection value data.

[0123] Therefore, in S2, the control unit 12A determines whether the carbon dioxide gas concentration D in the pipe GP1 exceeds a predetermined threshold value TH3 based on the received detection value data. The operator sets the threshold value TH3 by inputting the threshold value TH3 from the setting unit 12C in advance and storing the threshold value TH3 in the data storage area of ​​the storage device 12B.

[0124] The control unit 12A determines whether the carbon dioxide gas concentration D in the pipe GP1 exceeds the predetermined threshold value TH3 based on the received detection value data. When it is detected that the carbon dioxide gas concentration D exceeds the predetermined threshold value TH3, the control unit 12A sends a work stop command to the light source device 14 to stop the operation of the air pump 14a. Fig.15 At time t52, the carbon dioxide gas concentration D in the pipe GP1 exceeds a predetermined threshold value TH3. Fig.15 , the air supply / water supply button 22c (or the air supply / water supply button 22e) is operated at the timing of time t53. When the light source device 14 receives the work stop command, it stops the operation of the air pump 14a. As described above, when the control unit 12A determines that the state of carbon dioxide gas detected by the carbon dioxide concentration meter 61, in this case, the carbon dioxide gas concentration exceeds the prescribed threshold value TH3, it controls the air pump 14a to stop sending air.

[0125] In addition, in this embodiment, the control unit 12A also receives the detection signal from the carbon dioxide gas concentration meter 61 of the air supply device 15 and sends a work stop command to the light source device 14 to stop the operation of the air pump 14a, but the control unit 15A of the air supply device 15 can also send the work stop command directly to the light source device 14.

[0126] Furthermore, the control unit 14A of the light source device 14 may receive the detection value data from the carbon dioxide gas concentration meter 61 of the air supply device 15, determine whether the detection value data exceeds the threshold value TH3, and stop the operation of the air pump 14a.

[0127] In addition, in the case of this embodiment, the following situation is detected: after the surgeon turns on the power switch 15a (or the gas supply switch) of the gas supply device 15, the gas supply / water supply button 22c (or the gas supply / water supply button 22e) is operated, so that carbon dioxide gas actually flows and the carbon dioxide gas concentration D actually exceeds the predetermined threshold value TH3. If the valve of the carbon dioxide gas tank 17 is closed or the remaining amount of the carbon dioxide gas tank 17 is small, carbon dioxide gas does not flow to the pipeline GP1, and the carbon dioxide gas concentration D does not rise. In this case, the air pump 14a is not stopped, so it does not hinder the surgeon's field of view, and the surgeon can continue to perform the examination, etc.

[0128] In addition, in this embodiment, as in the first embodiment or the modification 1, when the power switch 15a or the air supply switch 15c is turned on and the carbon dioxide gas concentration D detected by the carbon dioxide gas concentration meter 61 exceeds the threshold value TH3, the control unit 12A may send an operation stop command to stop the operation of the air pump 14a. That is, when the state of carbon dioxide gas, in this case, the carbon dioxide gas concentration exceeds the predetermined threshold value TH3 and the air supply switch 15c of the air supply device 15 is turned on, the control unit 12A controls the air pump 14a to stop sending air. The control unit 12A can communicate with the air supply device 15 and judge that the power switch 15a or the air supply switch 15c of the air supply device 15 has become turned on according to whether the communication is possible. The control unit 12A can communicate with the air supply device 15 to obtain the state information of the air supply switch 15c through communication, thereby judging that the air supply switch 15c of the air supply device 15 has been turned on.

[0129] As described above, according to the above-described embodiments and modifications, it is possible to provide an endoscope system that can reduce the burden on the operator and reliably supply carbon dioxide gas into the body cavity.

[0130] In addition, in each of the above-mentioned embodiments and modifications, any one of the pressure, flow rate and carbon dioxide gas concentration of the carbon dioxide gas in the pipeline is detected by a detector, but it may also be that at least two or more states of carbon dioxide gas are detected, such as detecting pressure and flow rate, pressure and carbon dioxide gas concentration, flow rate and carbon dioxide gas concentration, or pressure, flow rate and carbon dioxide gas concentration, and when at least one of them exceeds a specified threshold value, the air pump 14a of the light source device 14 is stopped.

[0131] The present invention is not limited to the above-described embodiments, and various changes and modifications can be made within the scope of the present invention.

Claims

1. An endoscope system, comprising a gas supply device for delivering carbon dioxide gas and an air supply device for supplying air, wherein the carbon dioxide gas or the air gas is delivered from the front end of the endoscope when a predetermined operating member provided on the endoscope is operated, the endoscope system further comprising: A gas state detection unit, which is arranged inside the gas supply device and detects the state of the carbon dioxide gas; as well as The control unit controls the air supply device to stop delivering the air when the state of the carbon dioxide gas detected by the gas state detection unit reaches a predetermined threshold value after the carbon dioxide gas and the air are delivered simultaneously due to the operation of the operating member.

2. The endoscope system according to claim 1, characterized in that: The gas state detection unit is a pressure gauge provided at a subsequent stage of a flow rate regulating valve that regulates the flow rate of the carbon dioxide gas of the gas supply device.

3. The endoscope system according to claim 2, characterized in that: The control unit controls the air supply device to stop sending the air when the pressure detected by the pressure gauge exceeds the predetermined threshold value and an air supply switch of the air supply device is turned on.

4. The endoscope system according to claim 2, characterized in that: The control unit performs control to cause the air supply device to stop sending the air when the pressure detected by the pressure gauge exceeds the predetermined threshold and then becomes less than the predetermined threshold.

5. The endoscope system according to claim 2, characterized in that: The control unit controls the air supply device to stop sending the air when the pressure detected by the pressure gauge exceeds the predetermined threshold and then becomes equal to or higher than another threshold that is equal to or higher than the predetermined threshold.

6. The endoscope system according to claim 1, characterized in that: The gas state detection unit is a flow meter provided at a subsequent stage of a flow regulating valve that regulates the flow rate of the carbon dioxide gas of the gas supply device.

7. The endoscope system according to claim 6, characterized in that: The control unit performs control to stop the air supply device from sending the air when the flow rate detected by the flow meter exceeds the predetermined threshold value and an air supply switch of the air supply device is turned on.

8. The endoscope system according to claim 1, characterized in that: The gas state detection unit is a carbon dioxide gas concentration meter provided at a subsequent stage of a flow rate regulating valve that regulates a flow rate of the carbon dioxide gas of the gas supply device.

9. The endoscope system according to claim 8, characterized in that: The control unit controls the air supply device to stop sending the air when the carbon dioxide gas concentration detected by the carbon dioxide gas concentration meter exceeds the predetermined threshold value and the air supply switch of the air supply device is turned on.

10. The endoscope system according to claim 1, characterized in that: The gas state detection unit is at least two of a pressure gauge, a flow meter, and a carbon dioxide gas concentration meter provided at a subsequent stage of a flow control valve, wherein the flow control valve adjusts the flow rate of the carbon dioxide gas of the gas supply device. The state of the carbon dioxide gas is at least two of the pressure, the flow rate, and the carbon dioxide gas concentration in the pipeline at the downstream stage of the flow rate regulating valve detected by at least two of the pressure meter, the flow meter, and the carbon dioxide gas concentration meter.

11. The endoscope system according to claim 1, characterized in that: The device further includes a threshold setting unit configured to set the predetermined threshold value for the state of the carbon dioxide gas.

12. A control device, wherein: The control device includes a processor that controls the supply of carbon dioxide gas by the gas supply device and the supply of air by the air supply device. The processor performs the following actions: detecting a state of the carbon dioxide gas delivered from the gas delivery device; and The carbon dioxide gas and the air are simultaneously delivered, and when the state of the carbon dioxide gas detected after the carbon dioxide gas is delivered due to an operation member provided in the endoscope being operated reaches a predetermined threshold, control is performed to stop the air supply device from delivering the air.

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