Pneumoperitoneum machine and backflow liquid detection device thereof

Abstract

The utility model relates to the technical field of medical instruments, and particularly discloses a pneumoperitoneum machine and a backflow liquid detection device thereof. The backflow liquid detection device of the pneumoperitoneum machine comprises an air outlet connector, an adapter, a first signal line and a second signal line. The air outlet connector is used for being arranged on a panel of the pneumoperitoneum machine in a penetrating mode. The adapter is used for being communicated with an air path in the pneumoperitoneum machine, the adapter is communicated with the air outlet connector to form an air outlet channel, at least part of the air outlet connector is made of a conductive material, at least part of the adapter is made of a conductive material, and an insulating part is arranged between the matching surfaces of the air outlet connector and the adapter so as to insulate the air outlet connector from the adapter; the first signal line and the second signal line are arranged on the air outlet connector and the adapter respectively so that the first signal line and the second signal line can be conducted when the conducting medium passes through the air outlet channel. According to the backflow liquid detection device of the pneumoperitoneum machine, the liquid backflow detection function of the pneumoperitoneum machine can be achieved. And the backflow liquid detection device does not influence the sectional dimension of the air outlet channel, so that the flow control of the pneumoperitoneum machine is not influenced.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and more specifically, to an insufflator and its reflux fluid detection device. Background Technology

[0002] An insufflator is a specialized device used in laparoscopic surgery to establish and maintain pneumoperitoneum. It allows medical supplies to be infused into the abdominal cavity. The insufflator uses gas to separate the abdominal wall from the abdominal organs, creating a surgical space. It automatically stops inflating when a predetermined pressure is reached, maintaining a certain amount of gas to keep the abdominal cavity at the predetermined pressure. During surgery, if the intra-abdominal pressure rises above the preset pressure for automatic inflation, bodily fluids may flow back through the insufflation tube into the insufflator, a phenomenon known as fluid reflux.

[0003] To prevent backflow of bodily fluids, existing technologies typically include a fluid check valve located after the low-pressure control module of the insufflator. However, while the fluid check valve effectively prevents backflow, its small orifice size affects the flow rate of the insufflator, thus increasing the difficulty of precisely controlling the flow rate. Utility Model Content

[0004] In view of this, the purpose of this application is to provide an insufflator and a backflow liquid detection device thereof. The structural design of the insufflator and the backflow liquid detection device can effectively solve the problem that the backflow prevention device of the insufflator affects the flow rate of the insufflator.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] A backflow fluid detection device for an insufflator includes:

[0007] An air outlet connector is used to pass through the panel of the insufflator and connect the outside and inside of the insufflator. At least a portion of the air outlet connector is made of conductive material.

[0008] An adapter is used to connect to the air passage inside the pneumoperitoneum machine. The adapter is connected to the air outlet connector to form an air outlet channel. At least a portion of the adapter is made of conductive material, and an insulating component is provided between the air outlet connector and the adapter.

[0009] The first signal line and the second signal line are respectively provided at the air outlet connector and the adapter, so as to conduct when a conductive medium passes through the air outlet channel.

[0010] Optionally, in the above-mentioned reflux liquid detection device, the inner wall surface of the vent connector is made of conductive material, and the first signal line is connected to the inner wall surface of the vent connector through the first conductive part;

[0011] And / or,

[0012] The inner wall surface of the adapter is made of conductive material, and the second signal line is connected to the inner wall surface of the adapter through the second conductive part.

[0013] Optionally, in the above-mentioned reflux liquid detection device, the insulating component is an insulating sleeve, which is sleeved on the outside of the air outlet connector and the adapter, and the inner wall of the insulating sleeve is provided with a ring of protrusions, with the air outlet connector and the adapter respectively located on both sides of the protrusions.

[0014] Optionally, in the above-mentioned reflux liquid detection device, a first sealing ring is provided between the outer peripheral surface of the vent connector and the inner wall of the insulating sleeve, and a second sealing ring is provided between the outer peripheral surface of the adapter and the inner wall of the insulating sleeve, and the first sealing ring and the second sealing ring are respectively located on both sides of the protrusion.

[0015] Optionally, in the above-mentioned reflux liquid detection device, the insulating sleeve is provided with a first through hole, a first screw passes through the first through hole, and the first signal line is electrically connected to the vent connector through the first screw and fixed to the insulating sleeve by the first screw.

[0016] And / or,

[0017] The insulating sleeve is provided with a second through hole, and a second screw passes through the second through hole. The second signal line is electrically connected to the adapter through the second screw and is fixed to the insulating sleeve by the second screw.

[0018] Optionally, in the above-mentioned reflux liquid detection device, the outer peripheral surface of the vent connector near the adapter is provided with a first sink groove, and one end of the insulating sleeve is fitted into the first sink groove.

[0019] And / or,

[0020] The adapter has a second groove on its outer circumferential surface near the air outlet, and the other end of the insulating sleeve is fitted into the second groove.

[0021] Optionally, in the above-mentioned reflux liquid detection device, the outer peripheral surface of the vent connector is provided with a radially extending stepped surface, which is used to abut against the outer wall surface of the panel.

[0022] Optionally, the above-mentioned reflux liquid detection device further includes a nut, and the vent connector is provided with a thread that mates with the nut. The nut is locked from the inside of the panel to the vent connector to press the stepped surface against the outer wall surface of the panel.

[0023] Optionally, the above-mentioned backflow liquid detection device further includes a gasket for placement between the nut and the inner wall surface of the panel.

[0024] The reflux liquid detection device for an insufflator provided in this application includes an air outlet connector, an adapter, a first signal line, and a second signal line. The air outlet connector is installed on the panel of the insufflator, connecting the outside and inside of the insufflator. The adapter connects to the air passage inside the insufflator, forming an air outlet channel. At least a portion of both the air outlet connector and the adapter are made of conductive material, and an insulating element is provided between them to insulate them from each other. The first signal line and the second signal line are respectively located at the air outlet connector and the adapter, and are conductive when a conductive medium passes through the air outlet channel.

[0025] By applying the backflow liquid detection device for the insufflator provided in this application, gas in the air circuit can be discharged through the air outlet channel formed by the adapter and the liquid outlet connector to supply air. During normal operation of the insufflator, the first signal line and the second signal line are disconnected because the insulating component insulates between the air outlet connector and the adapter. However, when backflow occurs, the backflow liquid acts as a conductive medium, connecting the air outlet connector and the adapter, at which point the first signal line and the second signal line correspondingly become conductive. Therefore, by detecting the state or state change of the first signal line and the second signal line, the backflow liquid detection function of the insufflator can be realized.

[0026] Furthermore, the backflow liquid detection device does not affect the cross-sectional dimensions of the air outlet channel, and therefore does not affect the flow control of the pneumoperitoneum machine.

[0027] In addition, the reflux liquid detection device achieves insulation between the gas outlet connector and the adapter through insulating components, and reflux liquid detection can be achieved by the on / off state of the first signal line and the second signal line. It has a simple structure, is convenient to detect, and can achieve reliable reflux detection at a low cost.

[0028] To achieve the above objectives, this application also provides an insufflator, which includes any of the aforementioned reflux fluid detection devices. Since the aforementioned reflux fluid detection devices have the above-mentioned technical effects, the insufflator with such a device should also have the corresponding technical effects. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of an insufflator according to a specific embodiment of this application;

[0031] Figure 2 This is an exploded structural diagram of a reflux liquid detection device according to a specific embodiment of this application;

[0032] Figure 3 A cross-sectional schematic diagram of the reflux liquid detection device in its assembled state;

[0033] Figure 4 for Figure 3 A magnified view of a portion of the image.

[0034] Figure label:

[0035] 01-Air inlet; 02-Air outlet; 03-Panel;

[0036] 1- Reflux liquid detection device;

[0037] 11-Air outlet connector; 12-Adapter; 131-First signal line; 132-Second signal line; 14-Insulating sleeve; 151-First sealing ring; 152-Second sealing ring; 161-First screw; 162-Second screw; 17-Nut; 18-Washer; 19-Quick connector;

[0038] 101 - Exhaust channel;

[0039] 111-First settling groove; 112-Stepped surface; 113-Thread; 121-Second settling groove;

[0040] 141 - Protrusion; 142 - First through hole; 143 - Second through hole. Detailed Implementation

[0041] This application discloses an insufflator and its reflux liquid detection device, which can detect the liquid in the insufflator pipeline without affecting the flow control of the insufflator.

[0042] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0043] An insufflator can be used in conjunction with rigid endoscopes and surgical instruments to provide patients with gas at a constant temperature and pressure, such as by injecting it into the abdominal cavity. Gas. Specifically, the insufflator is used in conjunction with an insufflation tube, which delivers the gas processed by the insufflator to the patient. Please refer to [link to relevant documentation]. Figure 1The insufflator includes an air inlet 01 and an air outlet 02. The air inlet 01 connects to a gas source, which can be either a gas cylinder or a central gas source. The air outlet 02 connects to the inlet of the insufflator tube. The insufflator includes a high-pressure depressurization module, a low-pressure regulating control module, and a reflux fluid detection device 1, which are sequentially connected between its air inlet 01 and air outlet 02. The high-pressure depressurization module and the low-pressure regulating control module are used to achieve pressure control, and the reflux fluid detection device 1 is used to detect reflux fluid. During operation, the gas pressure output by the insufflator can be accurately adjusted according to surgical requirements or the patient's body shape, age, and other information to achieve optimal surgical conditions for abdominal surgeries, facilitating the doctor's observation and treatment. In this application, the reflux fluid detection device 1 is optimized to detect the fluid in the insufflator's tubing without affecting the insufflator's flow control. The following embodiments mainly describe the relevant structures.

[0044] In some embodiments, please refer to Figures 2-4 The backflow liquid detection device for an insufflator provided in this application includes an air outlet connector 11, an adapter 12, a first signal line 131, and a second signal line 132. The air outlet connector 11 is installed through the panel 03 of the insufflator and connects the outside and inside of the insufflator. For example, the air outlet connector 11 is connected to the insufflator tube, and one end of the air outlet connector 11 forms the air outlet 02 of the insufflator. The adapter 12 is connected to the air passage inside the insufflator. For example, the adapter 12 is connected to the outlet of the low-pressure regulating control module. The adapter 12 connects to the air outlet connector 11 to form an air outlet channel 101. It is understood that the connection between the adapter 12 and the air outlet connector 11 includes both direct connection and indirect connection via other components. The adapter 12 and the air outlet connector 11 form an air outlet channel 101. That is, the adapter 12 and the air outlet connector 11 each have an inner hole, and the inner holes of the two are connected to form the air outlet channel 101. The treated gas in the air circuit of the pneumoperitoneum machine is discharged through the air outlet channel 101 to supply air.

[0045] At least a portion of the vent connector 11 and the adapter 12 are made of conductive material, and an insulating element is provided between the vent connector 11 and the adapter 12 to insulate them from each other. A first signal line 131 and a second signal line 132 are respectively disposed at the vent connector 11 and the adapter 12 to conduct when a conductive medium passes through the vent channel 101. For example, the first signal line 131 is disposed at the vent connector 11, and the second signal line 132 is disposed at the adapter 12. Since at least a portion of the vent connector 11 and the adapter 12 are made of conductive material, it is understood that for the vent connector 11, the conductive portion should extend to the inner wall surface of the vent connector 11 and contact the first signal line 131; for the adapter 12, the conductive portion should extend to the inner wall surface of the adapter 12 and contact the second signal line 132. An insulating component is provided between the air outlet connector 11 and the adapter 12, i.e., the air outlet connector 11 and the adapter 12 are separated and insulated by the insulating component. For example, the insulating component is provided between the mating surfaces of the air outlet connector 11 and the adapter 12. When there is no backflow of liquid in the insufflator, the air outlet connector 11 and the adapter 12 are disconnected due to the insulation of the insulating component, and the corresponding first signal line 131 and the second signal line 132 are disconnected. When backflow of liquid occurs in the insufflator, the backflow acts as a conductive medium, connecting the air outlet connector 11 and the adapter 12, and the corresponding first signal line 131 and the second signal line 132 are connected. For example, the presence of liquid in the insufflator tubing is detected by detecting changes in the output circuit signals of the first signal line 131 and the second signal line 132.

[0046] Using the backflow liquid detection device for the insufflator provided in this application, gas in the air path can be discharged through the air outlet channel 101 formed by the adapter 12 and the liquid outlet connector to supply air. During normal operation of the insufflator, the first signal line 131 and the second signal line 132 are disconnected because the insulating component insulates the air outlet connector 11 and the adapter 12. When backflow occurs, the backflow liquid acts as a conductive medium to connect the air outlet connector 11 and the adapter 12, and the first signal line 131 and the second signal line 132 are switched to a conductive state. Therefore, by detecting the state or state change of the first signal line 131 and the second signal line 132, the backflow liquid detection function of the insufflator can be realized. Furthermore, this backflow liquid detection device does not affect the cross-sectional dimensions of the air outlet channel 101, and therefore does not affect the flow control of the insufflator. In addition, the reflux liquid detection device achieves insulation between the air outlet connector 11 and the adapter 12 through an insulating component, and the reflux liquid detection can be achieved by the on / off state of the first signal line 131 and the second signal line 132. The structure is simple and the detection is convenient.

[0047] In some embodiments, the inner wall surface of the vent connector 11 is made of conductive material, and the first signal line 131 is connected to the inner wall surface of the vent connector 11 through the first conductive part. By making the inner wall surface of the vent connector 11 all conductive, when the liquid in the vent channel 101 comes into contact with any part of the inner wall surface of the vent connector 11, it can be connected to the first signal line 131, thus improving the accuracy of liquid return detection. Specifically, the first conductive part can extend radially along the vent connector 11, with one end extending to the inner wall surface of the vent connector 11 and the other end extending to contact the first signal line 131.

[0048] In some specific examples, the vent connector 11 is made entirely of conductive material, providing reliable conductivity while being easy to mold. For instance, the vent connector 11 is made of stainless steel, which offers good conductivity and excellent mechanical properties.

[0049] In some embodiments, the inner wall surface of the adapter 12 is made of conductive material, and the second signal line 132 is connected to the inner wall surface of the adapter 12 through the second conductive part. By making the inner wall surface of the adapter 12 all conductive, when the liquid in the venting channel 101 comes into contact with any part of the inner wall surface of the adapter 12, it can be connected to the second signal line 132, thus improving the accuracy of liquid return detection. Specifically, the second conductive part can extend radially along the adapter 12, with one end extending to the inner wall surface of the adapter 12 and the other end extending to contact the second signal line 132.

[0050] In some specific examples, the adapter 12 is made entirely of a conductive material, providing reliable conductivity while being easy to mold. For instance, the adapter 12 is made of stainless steel, which offers good conductivity and excellent mechanical properties.

[0051] For example, the inner wall surface of the vent connector 11 is made of conductive material, and the first signal line 131 is connected to the inner wall surface of the vent connector 11 through the first conductive part; the inner wall surface of the adapter 12 is made of conductive material, and the second signal line 132 is connected to the inner wall surface of the adapter 12 through the second conductive part. Therefore, when the returned liquid is continuously distributed between any position of the vent connector 11 and any position of the adapter 12, the vent connector 11 and the adapter 12 can be connected, thereby connecting the first signal line 131 and the second signal line 132.

[0052] In some embodiments, the insulating component is an insulating sleeve 14, which is sleeved around the vent connector 11 and the adapter 12. The inner wall of the insulating sleeve 14 has a raised ring 141, with the vent connector 11 and the adapter 12 located on opposite sides of the raised ring 141. The insulating sleeve 14 provides insulation and connection between the vent connector 11 and the adapter 12. The vent connector 11 and the adapter 12 are respectively sleeved within the two ends of the insulating sleeve 14, separated by the raised ring 141. Specifically, the end of the vent connector 11 closest to the adapter 12 is located within one end of the insulating sleeve 14, and the end of the adapter 12 closest to the vent connector 11 is located within the other end of the insulating sleeve 14, with their opposite end faces separated by the raised ring 141. This configuration achieves reliable insulation between the vent connector 11 and the adapter 12, facilitates connection, and has a simple structure, making it easy to form and assemble the components. For example, the insulating sleeve 14 is made entirely of insulating material, such as plastic.

[0053] In other embodiments, the insulating element may also be an insulating coating provided on the vent connector 11 and / or the adapter 12. For example, an insulating coating may be provided on the end face of the vent connector 11 abutting with the adapter 12 or the end face of the adapter 12 abutting with the vent connector 11, which can also achieve insulation between the vent connector 11 and the adapter 12. Alternatively, the insulating element may also be an insulating material portion integrally formed between the vent connector 11 and the adapter 12.

[0054] In some embodiments, a first sealing ring 151 is provided between the air outlet connector 11 and the insulating sleeve 14, and a second sealing ring 152 is provided between the adapter 12 and the insulating sleeve 14. The first sealing ring 151 and the second sealing ring 152 are respectively provided on both sides of the protrusion 141. By providing the first sealing ring 151 and the second sealing ring 152, the air outlet connector 11 and the insulating sleeve 14 are sealed, and the adapter 12 and the insulating sleeve 14 are directly sealed, thereby preventing the medium in the air outlet channel 101 from leaking to the outside through the connection between the air outlet connector 11 and the adapter 12 and the connection between the two and the insulating sleeve 14, thus ensuring the reliability of the air supply of the pneumoperitoneum machine.

[0055] For example, the outer peripheral surface of the vent connector 11 is provided with a first sealing groove, and a first sealing ring 151 is disposed in the first sealing groove. The depth of the first sealing groove is less than the thickness of the first sealing ring 151, so that the first sealing ring 151 is pressed between the bottom of the first sealing groove and the inner wall of the insulating sleeve 14, so that the first sealing ring 151 meets a preset compression amount to provide corresponding sealing performance. In another example, the inner peripheral surface of the insulating sleeve 14 is provided with a first sealing groove, and the first sealing ring 151 is disposed in the first sealing groove. The depth of the first sealing groove is less than the thickness of the first sealing ring 151, so that the first sealing ring 151 is pressed between the bottom of the first sealing groove and the outer peripheral surface of the vent connector 11.

[0056] For example, the outer peripheral surface of the adapter 12 is provided with a second sealing groove, and a second sealing ring 152 is disposed in the second sealing groove. The depth of the second sealing groove is less than the thickness of the second sealing ring 152, so that the second sealing ring 152 is pressed between the bottom of the second sealing groove and the inner wall of the insulating sleeve 14, so that the second sealing ring 152 meets a preset compression amount to provide corresponding sealing performance. In another example, the inner peripheral surface of the insulating sleeve 14 is provided with a second sealing groove, and the second sealing ring 152 is disposed in the second sealing groove. The depth of the second sealing groove is less than the thickness of the second sealing ring 152, so that the second sealing ring 152 is pressed between the bottom of the second sealing groove and the outer peripheral surface of the adapter 12.

[0057] In some embodiments, the insulating sleeve 14 has a first through hole 142, and a first screw 161 passes through the first through hole 142. The first signal line 131 is electrically connected to the vent connector 11 through the first screw 161 and is fixed to the insulating sleeve 14 by the first screw 161. The first signal line 131 is connected to the vent connector 11 by the first screw 161, and the first screw 161 can also press the insulating sleeve 14 and the vent connector 11 together, thereby achieving a reliable fixed connection between the first signal line 131, the insulating sleeve 14, and the vent connector 11. At least a portion of the first screw 161 is made of conductive material, meaning the first screw 161 can serve as part of the aforementioned first conductive portion, and the first signal line 131 is electrically connected to the vent connector 11 through the first screw 161. This configuration simplifies the structure, facilitates assembly and disassembly, and reduces costs. For example, the first screw 161 is entirely made of conductive material.

[0058] In some embodiments, the insulating sleeve 14 has a second through hole 143, through which a second screw 162 passes. The second signal line 132 is electrically connected to the adapter 12 via the second screw 162 and is fixed to the insulating sleeve by the second screw 162. That is, the second signal line 132 is connected to the adapter 12 via the second screw 162, and the second screw 162 also presses the insulating sleeve 14 and the adapter 12 together, thereby achieving a reliable fixed connection between the second signal line 132, the insulating sleeve 14, and the adapter 12. Furthermore, at least a portion of the second screw 162 is made of conductive material, meaning the second screw 162 can serve as part of the aforementioned second conductive portion, and the second signal line 132 is electrically connected to the adapter 12 via the second screw 162. This configuration simplifies the structure, facilitates assembly and disassembly, and reduces costs. For example, the second screw 162 is entirely made of conductive material.

[0059] In other embodiments, a clearance hole can be provided on the insulating sleeve 14, through which the first signal line 131 passes and is welded to the vent connector 11, thus achieving conductivity between the first signal line 131 and the vent connector 11. The vent connector 11 and the insulating sleeve 14 can also be fixedly connected by interference fit, bonding, or other methods. The conductivity between the second signal line 132 and the adapter 12 can also refer to the aforementioned conductivity between the first signal line 131 and the vent connector 11, and will not be repeated here.

[0060] In some embodiments, the outer peripheral surface of the air outlet connector 11 near the adapter 12 is provided with a first recess 111, and one end of the insulating sleeve 14 is fitted into the first recess 111. By providing the first recess 111, the installation of the insulating sleeve 14 can be positioned and limited, which facilitates the assembly of the insulating sleeve 14 and the adapter 12.

[0061] In some embodiments, the outer peripheral surface of the adapter 12 near the vent connector 11 is provided with a second recess 121, and the other end of the insulating sleeve 14 is fitted into the second recess 121. By providing the second recess 121, the installation of the insulating sleeve 14 can be positioned and limited, which facilitates the assembly of the insulating sleeve 14 with the vent connector 11.

[0062] In some embodiments, the inner diameter of the outlet connector 11 near the adapter 12 is equal to the inner diameter of the adapter 12 near the outlet connector 11. In this application, liquid return detection is achieved through the cooperation of the outlet connector 11 and the adapter 12, combined with the arrangement of the first signal line 131 and the second signal line 132. Unlike conventional liquid check valves, this does not require the size of the orifice of a liquid check valve, thus enabling liquid return detection without changing the orifice diameter of the pneumoperitoneum machine's ventilation pipeline.

[0063] In some embodiments, the outer peripheral surface of the air outlet connector 11 is provided with a radially extending stepped surface 112, which abuts against the outer wall surface of the panel 03. It is understood that "radial extension" here refers to extension parallel to the radial direction or extension inclined relative to the radial direction and having a radial component. By providing the stepped surface 112, when the air outlet connector 11 is assembled onto the panel 03 of the inflator, the stepped surface 112 abuts against the outer wall surface of the panel 03, serving a positioning and limiting function, thereby facilitating the installation of the air outlet connector 11.

[0064] In some embodiments, the reflux liquid detection device further includes a nut 17, and the vent connector 11 is provided with a thread 113 that mates with the nut 17. The nut 17 is locked to the vent connector 11 from the inside of the panel 03 to press the stepped surface 112 against the outer wall surface of the panel 03, that is, clamped to the panel 03 from the inner wall surface side of the panel 03. By engaging the nut 17 with the thread 113 on the vent connector 11 to press the stepped surface 112 against the panel 03, the vent connector 11 is fixed to the panel 03. For example, the air outlet connector 11 has a thread 113 in the middle. The air outlet connector 11 passes through the mounting hole on the plate surface, and the stepped surface 112 abuts against the outer wall surface of the panel 03. The nut 17 is inserted into the air outlet connector 11 from the inside of the panel 03 and locks in place with the thread 113. The nut 17 and the stepped surface 112 can provide force from the inside and outside of the panel 03 respectively to clamp the panel 03, thus achieving reliable installation of the air outlet connector 11 and the panel 03. With the above configuration, the air outlet connector 11 and the panel 03 are easy to assemble and disassemble, and the connection is reliable. For example, the panel 03 is the front panel of the pneumoperitoneum machine.

[0065] In some embodiments, the backflow detection device further includes a gasket 18 disposed between the nut 17 and the inner wall surface of the panel 03. By providing the gasket 18 between the panel 03 and the nut 17, the contact area with the panel 03 can be increased, thereby dispersing pressure and reducing damage to the panel 03 and the nut 17. At the same time, the gasket 18 can prevent the nut 17 from loosening, maintain the tightness of the connection, and ensure the stability of the connection.

[0066] In some embodiments, the reflux liquid detection device further includes a quick connector 19, one end of which is sealed to the adapter 12, and the other end is used to connect to the gas circuit. That is, the adapter 12 is connected to the gas circuit via the quick connector 19, making assembly and disassembly convenient. For example, the quick connector 19 is an L-shaped quick connector.

[0067] Based on the reflux liquid detection device provided in the above embodiments, this application also provides an insufflator, which includes any of the reflux liquid detection devices in the above embodiments and further includes a detection module. An air outlet connector 11 is disposed through the panel 03 of the insufflator, and an adapter 12 is disposed inside the panel 03 and connected to the air passage inside the insufflator. The detection module is electrically connected to the first signal line 131 and the second signal line 132. Since this insufflator uses the reflux liquid detection device in the above embodiments, the beneficial effects of this insufflator are explained in the above embodiments. The detection module is used to detect the on / off state or state change between the first signal line 131 and the second signal line 132, thereby realizing the liquid reflux detection of the insufflator. For example, the detection module is used to detect changes in the output circuit signals of the first signal line 131 and the second signal line 132 to detect whether liquid exists in the insufflator's tubing.

[0068] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0069] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A backflow liquid detecting device of a pneumoperitoneum machine, characterized by, include: An air outlet connector (11) is used to pass through the panel (03) of the inflator and to connect the outside and inside of the inflator. At least a portion of the air outlet connector (11) is made of conductive material. The adapter (12) is used to connect with the air passage inside the pneumoperitoneum machine. The adapter (12) is connected with the air outlet connector (11) to form an air outlet channel (101). At least a portion of the adapter (12) is made of conductive material, and an insulating element is provided between the air outlet connector (11) and the adapter (12). The first signal line (131) and the second signal line (132) are respectively provided on the air outlet connector (11) and the adapter (12) to conduct when a conductive medium passes through the air outlet channel (101).

2. The return liquid detection device of a pneumoperitoneum machine according to claim 1, wherein The inner wall surface of the vent connector (11) is made of conductive material, and the first signal line (131) is connected to the inner wall surface of the vent connector (11) through the first conductive part. And / or, The inner wall surface of the adapter (12) is made of conductive material, and the second signal line (132) is connected to the inner wall surface of the adapter (12) through the second conductive part.

3. The return liquid detection device of a pneumoperitoneum machine according to claim 1, wherein The insulating component is an insulating sleeve (14), which is sleeved on the outside of the air outlet connector (11) and the adapter (12), and the inner wall of the insulating sleeve (14) is provided with a ring of protrusions (141), and the air outlet connector (11) and the adapter (12) are respectively located on both sides of the protrusions (141).

4. The return liquid detection device of a pneumoperitoneum machine according to claim 3, wherein A first sealing ring (151) is provided between the outer peripheral surface of the air outlet connector (11) and the inner wall of the insulating sleeve (14), and a second sealing ring (152) is provided between the outer peripheral surface of the adapter (12) and the inner wall of the insulating sleeve (14), and the first sealing ring (151) and the second sealing ring (152) are respectively located on both sides of the protrusion (141).

5. The return liquid detection device of a pneumoperitoneum machine according to claim 3, wherein The insulating sleeve (14) is provided with a first through hole (142), and a first screw (161) is inserted through the first through hole (142). The first signal line (131) is electrically connected to the air outlet connector (11) through the first screw (161) and is fixed to the insulating sleeve (14) by the first screw (161). And / or, The insulating sleeve (14) is provided with a second through hole (143), and a second screw (162) is inserted through the second through hole (143). The second signal line (132) is electrically connected to the adapter (12) through the second screw (162) and is fixed to the insulating sleeve (14) by the second screw (162).

6. The return liquid detection device of a pneumoperitoneum machine according to claim 3, wherein The outer peripheral surface of the air outlet connector (11) near the adapter (12) is provided with a first groove (111), and one end of the insulating sleeve (14) is fitted into the first groove (111). And / or, The adapter (12) has a second groove (121) on its outer peripheral surface near the air outlet (11), and the other end of the insulating sleeve (14) is fitted into the second groove (121).

7. The return liquid detection device of a pneumoperitoneum machine according to any one of claims 1 to 6, characterized in that, The outer peripheral surface of the air outlet connector (11) is provided with a radially extending stepped surface (112), which is used to abut against the outer wall surface of the panel (03).

8. The return liquid detection device of a pneumoperitoneum machine according to claim 7, wherein It also includes a nut (17), the vent connector (11) is provided with a thread (113) that mates with the nut (17), the nut (17) is locked from the inside of the panel (03) to the vent connector (11) to press the stepped surface (112) against the outer wall surface of the panel (03).

9. The return liquid detection device of a pneumoperitoneum machine according to claim 8, wherein It also includes a washer (18) for placement between the nut (17) and the inner wall surface of the panel (03).

10. A pneumostachion, characterized by The device includes a backflow liquid detection device as described in any one of claims 1-9, wherein the air outlet connector (11) is disposed on the panel (03) of the pneumoperitoneum machine, and the adapter (12) is disposed on the inner side of the panel (03) and communicates with the air passage inside the pneumoperitoneum machine; it also includes a detection module electrically connected to the first signal line (131) and the second signal line (132).

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