Surgical instrument and surgical system

Abstract

A surgical instrument and a surgical system, the surgical instrument comprising a handle assembly, a jaw assembly and a jaw tube assembly. The handle assembly is internally provided with a first fluid channel, the jaw tube assembly comprises a pull rod and a jaw tube, a second fluid channel is formed between the outer peripheral wall of the pull rod and the inner peripheral wall of the jaw tube, the jaw tube is provided with a smoke suction hole and a pressure relief hole which are in communication with the second fluid channel, the smoke suction hole is arranged close to the jaw assembly, and the pressure relief hole is arranged away from the smoke suction hole, and the first fluid channel is in communication with the second fluid channel; or, the pressure relief hole is arranged on the handle assembly to be in communication with the first fluid channel. When the smoke suction hole is immersed in the abdominal cavity liquid, the pressure relief hole can effectively reduce the negative pressure value of the second fluid channel, so as to avoid that the smoke suction hole excessively sucks the abdominal cavity liquid into the second fluid channel, and thus the application safety of the main machine is ensured.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more particularly to a surgical instrument and surgical system. Background Technology

[0002] Currently, in clinical surgical procedures, in addition to cutting or electrocoagulating biological tissues, other instruments are needed to perform other operations. For example, during abdominal surgery, a fumigation tube is needed to remove the smoke generated during blood clotting, thereby reducing the interference of smoke with the surgeon's work.

[0003] In related technologies, the tissue surface is usually rinsed with saline solution to determine the location of the wound before clotting. However, during application, the smoke extraction system may draw in excessive amounts of blood or saline solution, causing these substances to enter the main unit and potentially damage it. Summary of the Invention

[0004] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a surgical instrument and a surgical system that prevents excessive aspiration of peritoneal fluid by the surgical instrument, thereby ensuring the safety of the main unit.

[0005] In a first aspect, embodiments of this application provide a surgical instrument, comprising:

[0006] A handle assembly includes a handle for gripping and a trigger capable of moving relative to the handle, the handle having a first fluid channel;

[0007] A forceps assembly, including a first forceps head and a second forceps head, the first forceps head and the second forceps head being pivotable relative to each other to open or close the forceps assembly, at least one of the first forceps head and the second forceps head being configured to process biological tissue;

[0008] A clamp tube assembly includes a pull rod and a clamp tube sleeved outside the pull rod, used to connect the clamp head assembly and the handle. When the trigger moves relative to the handle, the clamp head assembly moves under the action of the pull rod, which has a kinematic relationship with the trigger, so that the first clamp head and the second clamp head pivot relative to each other. A second fluid channel is formed between the outer peripheral wall of the pull rod and the inner peripheral wall of the clamp tube. The first fluid channel is connected to the second fluid channel. The clamp tube is provided with a smoke extraction hole connected to the second fluid channel. The smoke extraction hole is located close to the clamp head assembly.

[0009] The clamp tube is further provided with a pressure relief hole that communicates with the second fluid channel, and the pressure relief hole is located away from the clamp head assembly; or, the handle assembly is provided with a pressure relief hole that communicates with the first fluid channel.

[0010] According to some embodiments of the present invention, if the pressure relief hole is provided in the clamp tube, the distance between the pressure relief hole and the smoke extraction hole is greater than or equal to one-tenth of the length of the clamp tube.

[0011] According to some embodiments of the present invention, if the pressure relief hole is provided in the clamp tube, the distance between the pressure relief hole and the smoke extraction hole is set to be greater than or equal to 30 mm.

[0012] According to some embodiments of the present invention, the distance between the pressure relief hole and the smoke extraction hole is set to be greater than or equal to 50 mm.

[0013] According to some embodiments of the present invention, a plurality of smoke extraction holes are provided, and the plurality of smoke extraction holes are arranged sequentially along the length direction of the clamp tube; or,

[0014] Multiple smoke extraction ports are provided, and the multiple smoke extraction ports are arranged sequentially along the circumferential direction of the clamp tube; or,

[0015] The smoke extraction port is provided in multiple sets, and the multiple sets of smoke extraction ports are arranged sequentially along the circumferential direction of the clamp tube. Each set of smoke extraction ports includes multiple smoke extraction ports and is arranged sequentially along the length direction of the clamp tube.

[0016] According to some embodiments of the present invention, if the pressure relief hole is provided in the clamp tube, there are multiple pressure relief holes, and the multiple pressure relief holes are arranged sequentially along the circumferential direction of the clamp tube.

[0017] According to some embodiments of the present invention, the pressure relief hole is elastically provided with a one-way flow device, which can automatically open under the action of external air pressure when the smoke extraction hole is submerged in abdominal fluid.

[0018] According to some embodiments of the present invention, the one-way flow device is a diaphragm disposed at the pressure relief hole.

[0019] Secondly, embodiments of this application provide a surgical system, including:

[0020] The aforementioned surgical instruments;

[0021] The liquid collection device includes a water storage tank and a filter element. The water storage tank is connected to the first fluid channel and is used to collect intra-abdominal fluid flowing into the third fluid channel. The filter element is located on the exhaust path of the water storage tank and is used to filter and purify the gas flowing out of the water storage tank.

[0022] According to some embodiments of the present invention, the surgical system further includes a main unit, the main unit having a third fluid channel and a control valve thereon to control the suction capacity of the smoke extraction port and the pressure relief port.

[0023] According to some embodiments of the present invention, the host further includes:

[0024] A sensor is installed on the delivery path of the third fluid channel to detect the flow rate and / or negative pressure value in the third fluid channel;

[0025] The control module controls the suction capacity of the smoke extraction port and the pressure relief port based on the flow rate value and / or the negative pressure value.

[0026] According to some embodiments of the present invention, the sensor includes a first sensor and a second sensor disposed in a third fluid channel, wherein the first sensor is used to detect the negative pressure value in the third fluid channel and the second sensor is used to detect the flow rate value in the third fluid channel.

[0027] Thirdly, embodiments of this application provide a surgical system, including:

[0028] The handle assembly includes a handle for gripping and a trigger movable relative to the handle, the handle having a first fluid channel; the clamp head assembly includes a first clamp head and a second clamp head, the first clamp head and the second clamp head being pivotable relative to each other to open or close the clamp head assembly, at least one of the first clamp head and the second clamp head being configured to process biological tissue; the clamp tube assembly includes a lever and a clamp tube sleeved outside the lever for connecting the clamp head assembly and the handle, when the trigger moves relative to the handle, the clamp head assembly moves under the action of the lever, which has a kinematic relationship with the trigger, so that the first clamp head and the second clamp head pivot relative to each other; wherein, a second fluid channel is formed between the outer peripheral wall of the lever and the inner peripheral wall of the clamp tube, the first fluid channel communicating with the second fluid channel, and the clamp tube having a smoke extraction hole communicating with the second fluid channel, the smoke extraction hole being located close to the clamp head assembly;

[0029] A liquid collection device is provided with a liquid collection channel, and the handle assembly is provided with a first pipe connected to the liquid collection channel;

[0030] The main unit is provided with a third fluid channel. The liquid collection device is detachably installed on the main unit so that the liquid collection channel is connected to the third fluid channel. The main unit is provided with a second pipe connected to an external air source. The second pipe is connected to the third fluid channel.

[0031] The first pipe, the second pipe, the liquid collection channel, or the third fluid channel are provided with pressure relief holes.

[0032] Fourthly, embodiments of this application provide a surgical system, which includes a surgical main unit and surgical instruments. The surgical instruments are provided with a fluid channel, and the fluid channel is provided with a smoke extraction port and a pressure relief port spaced apart. The surgical main unit is used for:

[0033] Determine whether abdominal fluid has been drawn into the smoke extraction port;

[0034] If abdominal fluid is drawn into the fume extraction port, the suction capacity of the fume extraction port will be reduced.

[0035] Determine whether the suction port has stopped drawing in abdominal fluid. If yes, stop reducing the suction capacity of the suction port; if no, continue reducing the suction capacity of the suction port.

[0036] According to some embodiments of the present invention, determining whether peritoneal fluid has been drawn into the fume extraction port includes:

[0037] The first sensor installed on the fluid channel is used to obtain the current first negative pressure value of the fluid channel;

[0038] The first negative pressure value currently detected by the first sensor is compared with the first preset value preset by the surgical host, wherein the maximum negative pressure value of the fluid channel is less than the first preset value when the smoke extraction port is not submerged in the peritoneal fluid;

[0039] If the current first negative pressure value is greater than or equal to the first preset value, then it is determined that the smoke extraction port draws abdominal fluid into the fluid channel;

[0040] If the first negative pressure value is less than the first preset value, it is determined that the smoke extraction port has not drawn abdominal fluid into the fluid channel.

[0041] According to some embodiments of the present invention, determining whether the fume extraction port has stopped drawing in peritoneal fluid includes:

[0042] The current second negative pressure value of the fluid channel is obtained by a first sensor installed on the fluid channel;

[0043] The second negative pressure value currently detected by the first sensor is compared with a second preset value preset by the surgical host; wherein the second preset value is less than the first preset value;

[0044] If the current second negative pressure value is less than the second preset value, then it is determined that the smoke extraction port will stop drawing abdominal fluid into the fluid channel.

[0045] According to some embodiments of the present invention, when the smoke extraction hole is not submerged in the abdominal cavity fluid, the maximum negative pressure value of the fluid channel is less than the second preset value.

[0046] According to some embodiments of the present invention, after the reduction of the suction capacity of the smoke extraction port is stopped, the surgical unit is further used to:

[0047] The current third negative pressure value of the fluid channel is obtained by a first sensor installed in the fluid channel;

[0048] The third negative pressure value currently detected by the first sensor is compared with the third preset value preset by the surgical host, wherein the third preset value is less than the second preset value;

[0049] If the current third negative pressure value is less than the third preset value, the suction capacity of the fluid channel is increased.

[0050] According to some embodiments of the present invention, after increasing the suction capacity of the fluid channel, the surgical unit is further used for:

[0051] The current fourth negative pressure value or first airflow rate of the fluid channel is obtained by using the first and second sensors installed in the fluid channel;

[0052] The fourth negative pressure value currently detected by the first sensor is compared with a fourth preset value preset by the surgical host. If the current fourth negative pressure value is greater than or equal to the fourth preset value, the increase in the suction capacity of the fluid channel is stopped; or,

[0053] The first airflow rate currently detected by the second sensor is compared with the first preset flow rate preset by the surgical host. If the current first airflow rate is greater than or equal to the first preset flow rate, the suction capacity of the fluid channel is stopped.

[0054] According to some embodiments of the present invention, when the smoke extraction port is not submerged in the abdominal cavity fluid, the maximum negative pressure value of the fluid channel is less than or equal to the third preset value.

[0055] According to some embodiments of the present invention, before determining whether peritoneal fluid has been drawn into the fume extraction port, the surgical main unit is further used for:

[0056] The current second airflow rate of the fluid channel is obtained by a second sensor installed in the fluid channel, and the suction capacity of the fluid channel is adjusted according to the current second airflow rate so that the second airflow rate reaches the second preset flow rate preset by the surgical host.

[0057] Accordingly, after determining whether peritoneal fluid has been drawn into the fume extraction port, the surgical main unit is also used for:

[0058] If the fluid channel does not draw in peritoneal fluid, continue to obtain the current second airflow rate of the fluid channel and adjust the suction capacity of the fluid channel according to the current second airflow rate so that the second airflow rate reaches the second preset flow rate preset by the surgical host.

[0059] According to some embodiments of the present invention, the surgical host is also used for:

[0060] Determine whether the smoke extraction port has been drawn out of the abdominal fluid;

[0061] If the suction port is withdrawn from the peritoneal fluid, the process of obtaining the current second airflow rate of the fluid channel and adjusting the suction capacity of the fluid channel according to the current second airflow rate is performed so that the second airflow rate reaches the second preset flow rate preset by the surgical host.

[0062] According to some embodiments of the present invention, determining whether the smoke extraction port has been withdrawn from the peritoneal fluid includes:

[0063] The negative pressure change and / or flow rate change of the fluid channel are obtained by using the first sensor and the second sensor installed in the fluid channel;

[0064] Whether the smoke extraction port is drawn out of the abdominal fluid is determined based on the negative pressure change and / or the flow rate change.

[0065] As can be seen from the above technical solutions, the embodiments of this application have the following advantages: when the main unit provides suction capability to the smoke extraction port, it also provides suction capability to the pressure relief port. Therefore, the smoke extraction port and the pressure relief port simultaneously extract smoke generated in the abdominal cavity. It should be noted that in specific applications, the smoke extraction port is positioned close to the forceps head assembly, maintaining a certain distance between them. This arrangement allows smoke generated during the coagulation process to be promptly discharged through the smoke extraction port.

[0066] Furthermore, during surgical instrument operation, the fume extraction port is close to the forceps assembly, and may be partially or completely submerged in peritoneal fluid, such as blood and / or saline. In this situation, the negative pressure in the second fluid channel increases, correspondingly increasing the suction capacity of the fume extraction port and pressure relief port. The unsubmerged portions of the pressure relief port and fume extraction port can further enhance the fume extraction effect.

[0067] It should be noted that, thanks to the pressure relief port, when the smoke extraction port is partially or completely submerged in abdominal fluid, the second fluid channel can draw gas from the abdominal cavity through the pressure relief port, thus ensuring a sufficiently high gas pressure in the second fluid channel. More precisely, the pressure relief port effectively prevents the negative pressure in the second fluid channel from becoming too high, which would lead to excessive suction capacity from the smoke extraction port. Therefore, the pressure relief port effectively prevents excessive abdominal fluid from being drawn into the second fluid channel through the smoke extraction port, thereby preventing abdominal fluid from flowing into the main unit along the fluid channel and ensuring the safe operation of the main unit. Attached Figure Description

[0068] Figure 1 This is a partial structural schematic diagram of the surgical instruments according to an embodiment of the present invention;

[0069] Figure 2 This is a schematic diagram of the forceps assembly in a surgical instrument according to an embodiment of the present invention;

[0070] Figure 3 This is a schematic diagram of the overall structure of the surgical instruments according to an embodiment of the present invention;

[0071] Figure 4 This is a schematic diagram illustrating the application process of the surgical system according to an embodiment of the present invention;

[0072] Figure 5 for Figure 4 A flowchart illustrating the specific implementation method in step S100;

[0073] Figure 6 for Figure 4 A flowchart illustrating the specific implementation method in step S300;

[0074] Figure 7 for Figure 4 A flowchart illustrating the specific implementation method following step S300.

[0075] The meanings of the reference numerals in the attached figures are as follows:

[0076] 100, Handle assembly; 110, Handle; 120, Trigger; 130, First fluid channel; 200, Clamp head assembly; 210, First clamp head; 220, Second clamp head; 300, Clamp tube assembly; 310, Pull rod; 320, Clamp tube; 321, Smoke extraction port; 322, Pressure relief port; 330, Second fluid channel; 400, Liquid collection device; 410, Water storage tank; 420, Filter element; 500, Main unit; 510, Third fluid channel; 520, Control valve; 530, First sensor; 540, Second sensor; 500, Air source. Detailed Implementation

[0077] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0078] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, up, down, etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0079] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0080] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0081] In the description of this invention, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0082] The present invention will now be described in further detail with reference to the accompanying drawings.

[0083] Currently, minimally invasive surgery occupies an important position in surgical procedures, and surgical instruments are commonly used in minimally invasive surgery. In clinical surgical procedures, in addition to cutting or electrocoagulating biological tissues, other instruments are needed to assist in other operations. For example, during laparoscopic surgery, energy instruments, such as bipolar electrocoagulation devices and ultrasonic scalpels, inevitably generate smoke during use. This smoke can affect the surgical field and interfere with the surgeon's work. Traditional methods of smoke removal usually require the use of trocars or irrigation tubes, necessitating interruptions in the surgical procedure to introduce new instruments, thus reducing surgical efficiency.

[0084] Therefore, this application provides a surgical instrument with a first fluid channel 130 and a second fluid channel 330 provided inside the surgical instrument for transporting fluid, thereby reducing instrument switching during the operation, improving surgical efficiency, shortening the operation time, and reducing the workload of doctors.

[0085] Please see Figures 1-3 This application provides a surgical instrument, including a handle assembly 100, a forceps head assembly 200, and a forceps tube assembly 300.

[0086] The handle assembly 100 includes a handle 110 for gripping and a trigger 120 capable of moving relative to the handle 110, the handle 110 being provided with a first fluid channel 130.

[0087] The clamp assembly 200 includes a first clamp head 210 and a second clamp head 220, which are pivotable relative to each other to open or close the clamp assembly 200. At least one of the first clamp head 210 and the second clamp head 220 is configured to process biological tissue. Exemplarily, the surgical instruments proposed in this application may be bipolar electrocoagulation devices, monopolar electrocoagulation devices with dual clamp heads, ultrasonic scalpels, anastomosing devices, etc. The processing of biological tissue can be energy-applied to the biological tissue, such as cutting by ultrasonic vibration or coagulation by bipolar or monopolar electrocoagulation, or it can be a process without energy application to the biological tissue, such as suturing by an anastomosing device.

[0088] The forceps tube assembly 300 includes a pull rod 310 and a forceps tube 320 sleeved outside the pull rod 310, used to connect the forceps head assembly 200 and the handle 110. The pull rod 310 and the trigger 120 have a kinematic engagement relationship. When the trigger 120 moves relative to the handle 110, the forceps head assembly 200 moves under the action of the pull rod 310, which has a kinematic engagement relationship with the trigger 120, causing the first forceps head 210 and the second forceps head 220 to pivot relative to each other, thereby realizing the opening or closing of the forceps head assembly 200. When operating surgical instruments, the operator can hold the handle 110 and insert the forceps head assembly 200 into the lesion site in the human body through the slender forceps tube assembly 300. Then, by operating the trigger 120 relative to the handle 110, the forceps head assembly 200 is driven to clamp biological tissue in a preset area, so that the forceps head assembly 200 can process biological tissue in the preset area without affecting other tissue areas.

[0089] A second fluid channel 330 is formed between the outer peripheral wall of the pull rod 310 and the inner peripheral wall of the clamp tube 320. The clamp tube 320 is provided with a smoke extraction hole 321 near the clamp head assembly 200, which communicates with the second fluid channel 330. The first fluid channel 130 is connected to the second fluid channel 330 and is used to connect to the main unit to realize the fluid channel between the smoke extraction hole 321 and the main unit.

[0090] The surgical instrument proposed in this application provides a fume extraction port 321 near the forceps head assembly 200 in the forceps tube 320. A first fluid channel 130 and a second fluid channel 330 within the instrument facilitate the flow of fluid between the fume extraction port 321 and the main unit, allowing for the removal of fluids, such as smoke generated during surgery. This application enables tissue processing and fluid delivery with a single surgical instrument, reducing instrument switching during surgery, eliminating the need for new instruments, and thus avoiding interruptions to the surgical procedure. This improves surgical efficiency, shortens surgical time, and reduces the workload of the surgeon.

[0091] In some embodiments, the host unit is provided with an air source 500, which is at least one of a negative pressure source and a positive pressure source. For example, the negative pressure source may be a fan or other negative pressure device capable of generating negative pressure airflow to discharge fluid. The positive pressure source may be an air pump or other power device capable of generating driving force to transport fluid.

[0092] In some applications, the main unit can be connected to a first negative pressure source to exhaust the smoke generated when the forceps assembly 200 applies energy to biological tissue through the fume extraction port 321. In this case, the fluid channel between the fume extraction port 321 and the main unit can be used to exhaust gas, preventing smoke generated during surgery from obstructing the surgeon's view.

[0093] In other application scenarios, the main unit can be connected to a positive pressure source; that is, the first fluid channel 130 can also be connected to a positive pressure source to drive the cleaning fluid to be output through the fume extraction port 321 to the forceps assembly 200 for cleaning biological tissue. Optionally, the main unit can be connected to a second negative pressure source, and the first fluid channel 130 is used to connect to the second negative pressure source to discharge waste fluid from the forceps assembly 200 through the fume extraction port 321. In this case, the fluid channel between the fume extraction port 321 and the main unit can be used for liquid input and / or output.

[0094] For example, the surgical instrument may be a bipolar electrocoagulation forceps, in which the first forceps head 210 and the second forceps head 220 are both clamps. The first forceps head 210 is connected to the positive terminal of the power supply that supplies energy to the surgical instrument, and the second forceps head 220 is connected to the negative terminal of the power supply that supplies energy to the surgical instrument. The first forceps head 210 and the second forceps head 220 are respectively positive and negative terminals, applying electrical energy to biological tissue for electrocoagulation treatment.

[0095] Of course, the surgical instrument can also be a monopolar electrocoagulation forceps, where the first forceps head 210 and the second forceps head 220 are both clamps, and one of the first forceps head 210 and the second forceps head 220 is connected to a primary power source that supplies energy to the surgical instrument.

[0096] In some embodiments, see Figures 1-2 The clamp tube 320 is also provided with a pressure relief hole 322 that communicates with the second fluid channel 330. The pressure relief hole 322 is located away from the clamp head assembly 200. In other words, the pressure relief hole 322 is located at a certain distance from the smoke extraction hole 321. In other possible embodiments, the pressure relief hole 322 may also be provided on the handle 110, and the pressure relief hole 322 communicates with the first fluid channel 130.

[0097] Specifically, the fume extraction port 321 is positioned close to the forceps assembly 200, with a distance of approximately 1-2 cm between them. Therefore, under the action of the main unit's air source 500, the fume extraction port 321 can promptly extract the smoke generated during the coagulation process from the abdominal cavity, thereby preventing smoke from interfering with the surgeon's operation.

[0098] It should be noted that, through the design of the pressure relief hole 322, when the smoke extraction hole 321 is partially or completely submerged in abdominal fluid, the pressure relief hole 322 can draw in gas from the external environment. This prevents the second fluid channel 330 from having a sufficiently high air pressure value. In other words, the pressure relief hole 322 effectively prevents the negative pressure in the second fluid channel 330 from being too low, which would result in excessive suction capacity from the smoke extraction hole 321. Therefore, the pressure relief hole 322 effectively prevents the smoke extraction hole 321 from drawing excessive abdominal fluid into the second fluid channel 330, thereby preventing abdominal fluid from flowing into the main unit along the fluid channel and ensuring the safe operation of the main unit.

[0099] During the operation of the surgical instruments, the fume extraction port 321 is relatively close to the forceps assembly 200, and the fume extraction port 321 may be partially or completely submerged in the peritoneal fluid, such as blood and / or saline. At this time, the negative pressure of the second fluid channel 330 increases, correspondingly increasing the suction capacity of the fume extraction port 321 and the pressure relief port 322. The unsubmerged portion of the fume extraction port 321 can enhance the suction effect; furthermore, the pressure relief port 322 can draw in a sufficient amount of gas into the fluid channel to maintain the pressure value of the fluid channel, thereby preventing the fume extraction port 321 from drawing excessive peritoneal fluid into the second fluid channel 330.

[0100] In some embodiments, if the pressure relief port 322 is provided in the forceps tube 320, when the forceps assembly 200 is applied to abdominal surgery, the pressure relief port 322 is configured to be located in the abdominal cavity or in a closed space communicating with the abdominal cavity, but it is not limited to the pressure relief port 322 being not located in the abdominal cavity or in a closed space communicating with the abdominal cavity.

[0101] Specifically, the surgical instruments of this application are mainly used in abdominal surgery. While the main unit provides suction capability to the fume extraction port 321, it also simultaneously provides suction capability to the pressure relief port 322. The second fluid channel 330 can suction gas from the abdominal cavity through the pressure relief port 322. Furthermore, because the pressure relief port 322 is located within the abdominal cavity or in a closed space connected to the abdominal cavity, and is positioned at a certain distance from the fume extraction port 321, any smoke not promptly treated by the fume extraction port 321 can be discharged through the pressure relief port 322, further preventing smoke from interfering with the doctor's work.

[0102] In some embodiments, the surgical instrument is used in conjunction with a trocar, which has a guide tube for insertion into the abdominal cavity. The guide tube has a guide channel communicating with the abdominal cavity, which can be understood as the aforementioned enclosed space. The forceps assembly 300 passes through the guide channel of the trocar to extend into the abdominal cavity. Simultaneously, the forceps 320 has an insertion section for inserting the trocar, with a fumigation port 321 and a pressure relief port 322 located in the insertion section. Therefore, when the forceps assembly 200 is used in abdominal surgery, the pressure relief port 322 is located either inside the abdominal cavity or within the guide channel of the trocar. When the guide tube is inserted into the abdominal cavity, one end is typically inside the abdominal cavity, and the other end is outside. Therefore, if the pressure relief port 322 is located within the guide channel, it may be located within one of the two ends of the guide tube.

[0103] The term "insertion segment" refers to the clamp tube 320 that passes through the main body of the puncture tube 320. In other words, the insertion segment includes not only the part located in the guide channel, but also the part that extends into the abdominal cavity from the guide channel.

[0104] Understandably, the pressure relief port 322 is located on the insertion section of the clamp tube 320 into the puncture card. This arrangement places the pressure relief port 322 within the abdominal cavity or in a closed space connected to the abdominal cavity, thus assisting the fume extraction port 321 in timely venting of smoke generated within the abdominal cavity. Furthermore, the pressure relief port 322 can still promptly vent smoke from the abdominal cavity even when the fume extraction port 321 is partially or completely submerged in abdominal fluid; simultaneously, it prevents excessive negative pressure in the second fluid channel 330, which could lead to excessive intake of abdominal fluid through the fume extraction port 321.

[0105] In some embodiments, the distance between the pressure relief hole 322 and the smoke extraction hole 321 is greater than or equal to one-tenth of the length of the clamp tube 320. For example, the length of the clamp tube 320 is not less than 750 mm, and correspondingly, the distance between the smoke extraction hole 322 and the pressure relief hole 322 is greater than or equal to 7.50 mm. This arrangement ensures that the pressure relief hole 322 and the smoke extraction hole 321 have a suitable distance, allowing the pressure relief hole 322 to be located within the abdominal cavity or in a closed space connected to the abdominal cavity during application, thus assisting the smoke extraction hole 321 in timely venting of smoke generated in the abdominal cavity. Simultaneously, when part or the front of the smoke extraction hole 321 is submerged in abdominal fluid, the pressure relief hole 322 also serves to prevent the negative pressure of the second fluid channel 330 from becoming too low, thus preventing the smoke extraction hole 321 from drawing excessive abdominal fluid.

[0106] In some embodiments, see Figures 1-2 If the pressure relief hole is located in the clamp tube, the distance between the pressure relief hole 322 and the smoke extraction hole 321 is set to be greater than or equal to 30mm. For example, the distance between the pressure relief hole 322 and the smoke extraction hole 321 can be 30cm, 40cm, 50cm, 60cm, 70cm, 80cm, 90cm, 100cm, 110cm, 120cm, 130cm, 140cm, 150cm, 160cm, etc. It is understood that the distance between the pressure relief hole 322 and the smoke extraction hole 321 is not less than 30mm. With this setting, the pressure relief hole 322 and the smoke extraction hole 321 have a suitable distance. When in use, the pressure relief hole 322 is located in the abdominal cavity or in a closed space connected to the abdominal cavity, so as to assist the smoke extraction hole 321 in timely discharging the smoke generated in the abdominal cavity. Meanwhile, when the smoke extraction port 321 is partially or pre-submerged in peritoneal fluid, the pressure relief port 322 is also used to prevent the negative pressure of the second fluid channel 330 from being too low, thus preventing the smoke extraction port 321 from drawing in too much peritoneal fluid.

[0107] Further specifying, in some embodiments, please refer to Figures 1-2If the pressure relief hole is located in the clamp tube, the distance between the pressure relief hole 322 and the smoke extraction hole 321 is set to be greater than or equal to 50mm. For example, the distance between the pressure relief hole 322 and the smoke extraction hole 321 can be 50cm, 60cm, 70cm, 80cm, 90cm, 100cm, 110cm, 120cm, 130cm, 140cm, 150cm, 160cm, etc. It is understood that the distance between the pressure relief hole 322 and the smoke extraction hole 321 is not less than 50mm. With this setting, the pressure relief hole 322 and the smoke extraction hole 321 have a more suitable distance. When in use, the pressure relief hole 322 is located in the abdominal cavity or in a closed space connected to the abdominal cavity, so as to assist the smoke extraction hole 321 in timely exhausting the smoke generated in the abdominal cavity. Meanwhile, when the smoke extraction port 321 is partially or pre-submerged in peritoneal fluid, the pressure relief port 322 is also used to prevent the negative pressure of the second fluid channel 330 from being too low, thus preventing the smoke extraction port 321 from drawing in too much peritoneal fluid.

[0108] In some embodiments, multiple smoke extraction holes 321 are provided, and the multiple smoke extraction holes 321 are arranged sequentially along the length direction of the clamp tube 320.

[0109] Understandably, multiple fume extraction ports 321 are arranged sequentially along the length of the forceps tube 320. That is, the distance between each fume extraction port 321 and the forceps head assembly 200 is different. With this arrangement, during the operation of the surgical instruments, the peritoneal fluid may only submerge part of the fume extraction ports 321, leaving some fume extraction ports 321 unsubmerged. Therefore, the fume extraction ports 321 still retain the fume extraction effect, which can promptly extract the smoke generated in the peritoneal cavity, thus avoiding excessive removal of peritoneal fluid by the fume extraction ports 321 that are submerged in the peritoneal fluid, which could damage the main unit.

[0110] In addition, the flow direction of the smoke is roughly the same as the length direction of the forceps tube 320. Therefore, multiple smoke extraction holes 321 are arranged sequentially along the length direction of the forceps tube 320, so that they are located sequentially on the movement path of the smoke. Thus, the smoke extraction holes 321 can fully extract the smoke generated in the abdominal cavity, thereby reducing the visual impact of the smoke on the doctor.

[0111] In some embodiments, see Figures 1-2 Multiple smoke extraction holes 321 are provided, and the multiple smoke extraction holes 321 are arranged sequentially along the circumferential direction of the forceps tube 320. With this arrangement, the second fluid channel 330 can provide suction force towards the periphery of the forceps tube 320 through the smoke extraction holes 321 around the forceps tube 320, thereby ensuring that the first fluid channel 130 can fully extract the smoke generated in the abdominal cavity, thereby reducing the visual impact of the smoke on the doctor.

[0112] In addition, the clamp tube 320 is usually tilted during application. Therefore, multiple smoke extraction holes 321 are arranged sequentially along the circumferential direction of the clamp tube 320. With this arrangement, if the smoke extraction hole 321 on one side of the clamp tube 320 is submerged in the peritoneal fluid, the smoke extraction hole 321 on the other side of the clamp tube 320 remains exposed. Therefore, the smoke extraction hole 321 still retains the smoke extraction effect, which can promptly extract the smoke generated in the peritoneal cavity and prevent the smoke extraction hole 321 submerged in the peritoneal fluid from drawing away too much peritoneal fluid, which could damage the main unit.

[0113] In other possible embodiments, multiple sets of smoke extraction holes 321 are provided, and these multiple sets of smoke extraction holes 321 are arranged sequentially along the circumferential direction of the clamp tube 320. Furthermore, each set of smoke extraction holes 321 includes multiple smoke extraction holes 321, and the smoke extraction holes 321 in each set are arranged sequentially along the length direction of the clamp tube 320. For example, three sets of smoke extraction holes 321 are provided, distributed around the clamp tube 320, and each set of smoke extraction holes 321 includes three smoke extraction holes 321, which are arranged sequentially along the length direction of the clamp tube 320.

[0114] It is understandable that the smoke extraction port 321 adopts the above-mentioned arrangement. The smoke extraction port 321 takes into account the advantages of the two structural forms mentioned above, thereby ensuring that the smoke extraction port 321 can fully extract the smoke generated in the abdominal cavity during application, and minimize the probability of abdominal fluid submerging the smoke extraction port 321, so as to avoid drawing in too much abdominal fluid.

[0115] In some embodiments, see Figures 1-2 If the pressure relief port is located in the clamp tube, one or more pressure relief ports 322 may be provided. If multiple pressure relief ports 322 are provided, typically 2-3, they are arranged sequentially along the circumferential direction of the clamp tube 320. With this arrangement, the second fluid channel 330 can provide suction force towards the periphery of the clamp tube 320 through the pressure relief ports 322 around the clamp tube 320. When the fumigation port 321 partially or completely submerges the peritoneal fluid, the second fluid channel 330 can quickly suction the smoke generated in the peritoneal cavity through the pressure relief ports 322 to reduce the impact of smoke on the doctor's vision. Simultaneously, the pressure relief ports 322 can effectively ensure that the negative pressure of the second fluid channel 330 does not become too low, thereby preventing excessive suction of peritoneal fluid into the fumigation port 321 and ensuring the safe operation of the main unit.

[0116] In some embodiments, the pressure relief port 322 is elastically provided with a one-way flow device, which can automatically open under the action of external air pressure when the smoke extraction port 321 is submerged in abdominal fluid. For example, the one-way flow device is a diaphragm provided in the pressure relief port 322.

[0117] Specifically, under normal use, the pressure value in the fluid channel is sufficiently high, and the one-way flow device remains sealed to the pressure relief port 322 under the action of its elasticity. This configuration ensures that the smoke extraction port 321 has a sufficiently large suction capacity, thereby guaranteeing that it can promptly remove smoke generated in the abdominal cavity. When the smoke extraction port 321 is partially or completely submerged in the abdominal cavity fluid, the negative pressure in the fluid channel increases, i.e., the pressure difference between the flow channel and the external environment increases. Therefore, the atmospheric pressure in the external environment overcomes the elasticity of the one-way flow device, causing it to switch from a closed state to an open state. At this time, the main unit's air source 500 provides suction capacity to the pressure relief port 322, which draws gas into the fluid channel, thus preventing a large negative pressure value in the fluid channel and preventing the smoke extraction port 321 from drawing excessive abdominal cavity fluid into the second fluid channel 330, thereby ensuring the safe operation of the main unit.

[0118] Understandably, the one-way flow device, employing the aforementioned structural form, can utilize its own elasticity to seal the pressure relief port 322. Simultaneously, when the fume extraction port 321 is partially or completely submerged in abdominal fluid, the pressure difference between the fluid channel and the external environment automatically opens the one-way flow device. Therefore, the one-way flow device has a simple structure; for example, it is a diaphragm located at the pressure relief port 322. Consequently, the one-way flow device is convenient to use, especially suitable for pressure relief ports 322 located on the clamp tube 320.

[0119] This application discloses a surgical system, including the aforementioned surgical instruments and a liquid collection device 400. The liquid collection device 400 is typically located at the inlet of the main unit and is used to filter the incoming gas.

[0120] Specifically, the liquid collection device 400 includes a water storage tank 410 and a filter element 420. The water storage tank 410 is connected to the first fluid channel 130 to collect intra-abdominal fluid flowing into the third fluid channel 510. For example, a pipe is provided at the tail of the handle 110, and the air inlet of the water storage tank 410 is connected to the pipe, thereby connecting the water storage tank 410 to the first fluid channel 130. The filter element 420 is located on the exhaust path of the water storage tank 410 and is used to filter and purify the gas flowing out of the water storage tank 410.

[0121] In practical application, when smoke and peritoneal fluid are drawn in through the smoke extraction port 321, the smoke and peritoneal fluid flow into the first fluid channel 130 along the second fluid channel 330, and then into the water storage tank 410 along the first fluid channel 130. The water storage tank 410 collects the incoming peritoneal fluid. At the same time, after passing through the water storage tank 410, the smoke flows to the filter element 420 along the third fluid channel 410. The filter element 420 filters and purifies the smoke, thereby preventing irritating gases from flowing into the operating room and effectively ensuring the physical and mental safety of the doctors.

[0122] It is understandable that the filter element 420 is located in the exhaust path of the water storage tank 410. Therefore, the filter element 420 is used to filter and purify the gas flowing out of the water storage tank 410. This arrangement effectively prevents intraperitoneal fluid from flowing to the filter element 420 first and then to the water storage tank 410, ensuring that the filter element 420 is effectively utilized and preventing intraperitoneal fluid from affecting the filtration and purification effect of the filter element 420.

[0123] In some embodiments, see Figures 1-3 The surgical system also includes a main unit 500, which has a third fluid channel 510. The exhaust port of the water storage tank 410 is connected to the third fluid channel 510. A control valve 520 is installed on the third fluid channel 510 to control the suction capacity of the smoke extraction port 321 and the pressure relief port 322. The control valve 440 is located after the filter element 420. After passing through the filter element 420, the airflow flows to the control valve 440. The filter element 420 effectively prevents smoke particles entrained in the airflow from flowing to the control valve 440, ensuring the service life of the control valve 440. Simultaneously, the control valve 440 automatically controls its opening, thereby controlling the suction capacity of the smoke extraction port 321 and the pressure relief port 322. Alternatively, the suction capacity of the smoke extraction port 321 and the pressure relief port 322 can also be adjusted by controlling the working power of the air source 500.

[0124] Among them, the control valve 440 can be a proportional valve, a pinch valve, etc.

[0125] In practical applications, if the smoke extraction port 321 is detected to be partially or completely submerged in the peritoneal fluid, the opening of the control valve 440 is adjusted to reduce the suction capacity of the smoke extraction port 321 and the pressure relief port 322. This prevents the smoke extraction port 321 from drawing in too much peritoneal fluid, which could fill the water reservoir 410 and cause it to flow into the air source 500. Conversely, if there is excessive smoke in the peritoneal cavity, the doctor can increase the suction level, widening the opening of the control valve 440 and increasing the suction capacity of the smoke extraction port 321 and the pressure relief port 322. The smoke extraction port 321 will then quickly extract the smoke generated in the peritoneal cavity, reducing visual interference from the smoke.

[0126] In some embodiments, see Figures 1-3The surgical instrument also includes sensors and a control module. The sensors are positioned along the delivery path of the third fluid channel 410 to detect the flow rate and / or negative pressure in the third fluid channel 410. The control module controls the suction capacity of the extraction port 321 and the pressure relief port 322 based on the flow rate and / or negative pressure.

[0127] The sensors include a first sensor 450 and a second sensor 460. The first sensor 450 is an absolute pressure sensor installed in the third fluid channel 410, which is used to detect the negative pressure value in the third fluid channel 410. The second sensor 460 is a differential pressure sensor installed in the third fluid channel 410, which is used to detect the flow rate value in the third fluid channel 410.

[0128] In one application, a first sensor is installed on the third fluid channel 410. This first sensor can be an absolute pressure sensor, used to detect the pressure value in the third fluid channel 410. The control module can control the suction capacity of the smoke extraction port 321 and the pressure relief port 322 based on the pressure value detected by the absolute pressure sensor. For example, if the negative pressure detected in the third fluid channel 410 is low, the suction capacity of the smoke extraction port 321 and the pressure relief port 322 is weak. The control module can increase the suction capacity of the smoke extraction port 321 and the pressure relief port 322 to ensure that the smoke generated in the abdominal cavity can be discharged in a timely manner. Alternatively, the control module can also determine whether the smoke extraction port 321 is partially or completely submerged in the abdominal cavity fluid based on detected pressure changes. If it is determined that the smoke extraction port 321 is partially or completely submerged in the abdominal cavity fluid, the control module needs to reduce the suction capacity of the smoke extraction port 321 and the pressure relief port 322 to reduce excessive suction of abdominal cavity fluid by the smoke extraction port 321.

[0129] In another application, a second sensor, such as a differential pressure sensor, is installed on the third fluid channel 410. This differential pressure sensor detects the flow rate in the third fluid channel 410. The control module can then control the suction capacity of the fume extraction port 321 and the pressure relief port 322 based on the flow rate detected by the differential pressure sensor. For example, if the flow rate detected in the third fluid channel 410 is too low, the control module can increase the suction capacity of the fume extraction port 321 and the pressure relief port 322 to ensure that smoke generated in the abdominal cavity is promptly expelled. Furthermore, the control module can also determine whether the fume extraction port 321 is partially or completely submerged in the abdominal fluid based on the detected flow rate changes. If it is determined that the fume extraction port 321 is partially or completely submerged in the abdominal fluid, the control module needs to reduce the suction capacity of the fume extraction port 321 and the pressure relief port 322 to reduce excessive suction of abdominal fluid into the fume extraction port 321.

[0130] In other applications, the third fluid channel 410 is equipped with both a differential pressure sensor and an absolute pressure sensor. The differential pressure sensor detects the flow rate in the third fluid channel 410, and the absolute pressure sensor detects the pressure in the third fluid channel 410. Therefore, the control module can control the suction capacity of the fume extraction port 321 and the pressure relief port 322 based on the pressure values ​​detected by the differential pressure sensor and the absolute pressure sensor. For example, if the fume extraction port 321 is partially or completely not submerged in the abdominal cavity fluid during normal operation, the control module controls the suction capacity of the fume extraction port 321 and the pressure relief port 322 based on the flow rate detected by the differential pressure sensor; if the fume extraction port 321 is not submerged in the abdominal cavity fluid during abnormal operation, the control module controls the suction capacity of the fume extraction port 321 and the pressure relief port 322 based on the pressure value detected by the absolute pressure sensor. Of course, the control module can determine whether the smoke extraction port 321 is partially or completely submerged in the peritoneal fluid based on the detection value of the differential pressure sensor or the absolute pressure sensor, or it can determine whether the smoke extraction port 321 is partially or completely submerged in the peritoneal fluid based solely on the detection value of the absolute pressure sensor.

[0131] This application discloses a surgical system, referring to... Figure 1 and Figure 2 The surgical system includes surgical instruments, which include a handle assembly 100, a forceps head assembly 200, and a forceps tube assembly 300. The handle assembly 100 includes a handle 110 for gripping and a trigger 120 movable relative to the handle 110. The handle 110 has a first fluid channel 130. The forceps head assembly 200 includes a first forceps head 210 and a second forceps head 220, which are pivotable relative to each other to open or close the forceps head assembly 200. At least one of the first forceps head 210 and the second forceps head 220 is configured to process biological tissue. The forceps tube assembly 300 includes a lever 31. The clamp tube 320, which is sleeved outside the lever 310, is used to connect the clamp head assembly 200 and the handle 110. When the trigger 120 moves relative to the handle 110, the clamp head assembly 200 moves under the action of the lever 310, which has a kinematic relationship with the trigger 120, so that the first clamp head 210 and the second clamp head 220 pivot relative to each other. A second fluid channel 330 is formed between the outer peripheral wall of the lever 310 and the inner peripheral wall of the clamp tube 320. The first fluid channel 130 is connected to the second fluid channel 330. The clamp tube 320 is provided with a smoke extraction hole 321 that is connected to the second fluid channel 330. The smoke extraction hole 321 is located close to the clamp head assembly 200.

[0132] Furthermore, the surgical system also includes a fluid collection device 400 and a main unit 500. The fluid collection device 400 is provided with a fluid collection channel, and the handle assembly 100 is provided with a first pipe connected to the fluid collection channel. The main unit 500 is provided with a third fluid channel 510. The fluid collection device 400 is detachably mounted on the main unit 500 so that the fluid collection channel is connected to the third fluid channel 510. The main unit 500 is provided with a second pipe connected to an external air source 500, and the second pipe is connected to the third fluid channel 510. The first pipe, the second pipe, the fluid collection channel, or the third fluid channel 510 are provided with pressure relief holes 322.

[0133] Specifically, the fume extraction port 321 is positioned close to the forceps assembly 200, with a distance of approximately 1-30 mm between them. Therefore, during the coagulation process, the fume extraction port 321 can promptly extract the smoke generated in the abdominal cavity under the action of the main unit's air source 500, thereby preventing smoke from interfering with the surgeon's operation.

[0134] It should be noted that the first pipe, the second pipe, the liquid collection channel, or the third fluid channel 510 are equipped with pressure relief holes 322. By providing pressure relief holes 322, when the smoke extraction port 321 is partially or completely submerged in abdominal fluid, the pressure relief holes 322 can draw in gases from the external environment, thus preventing the second fluid channel 330 from having a sufficiently high air pressure. In other words, the pressure relief holes 322 effectively prevent the negative pressure in the second fluid channel 330 from becoming too low, which would result in excessive suction capacity from the smoke extraction port 321. Therefore, the pressure relief holes 322 effectively prevent the smoke extraction port 321 from drawing excessive abdominal fluid into the second fluid channel 330, thereby preventing abdominal fluid from flowing into the main unit along the fluid channel, and thus ensuring the safe operation of the main unit.

[0135] During the operation of the surgical instruments, the fume extraction port 321 is relatively close to the forceps assembly 200, and the fume extraction port 321 may be partially or completely submerged in the peritoneal fluid, such as blood and / or saline. At this time, the negative pressure of the second fluid channel 330 increases, correspondingly increasing the suction capacity of the fume extraction port 321 and the pressure relief port 322. The unsubmerged portion of the fume extraction port 321 can enhance the suction effect; furthermore, the pressure relief port 322 can draw in a sufficient amount of gas into the fluid channel to maintain the pressure value of the fluid channel, thereby preventing the fume extraction port 321 from drawing excessive peritoneal fluid into the second fluid channel 330.

[0136] This application also provides a surgical system; please refer to [link to relevant documentation]. Figures 1-3The surgical system includes a surgical host and surgical instruments, which can be understood as the surgical instruments described above. Specifically, the surgical instruments are provided with fluid channels, which can be understood as the sum of the first fluid channel 130, the second fluid channel 330, and the third fluid channel 410. Smoke extraction holes 321 and pressure relief holes 322 are spaced apart on the fluid channels, and both are used to extract smoke generated within the abdominal cavity to discharge it into the external environment.

[0137] Specifically, please see Figures 3-4 The surgical host is used for:

[0138] S100 determines whether abdominal fluid has been drawn into the smoke extraction port 321.

[0139] The fluid channel is equipped with sensors along its delivery path, such as the differential pressure sensor and / or absolute pressure sensor mentioned above. These sensors detect changes in pressure or flow rate within the fluid channel to determine whether abdominal fluid has been drawn into the fume extraction port 321. Alternatively, the surgical unit can employ other sensors to detect whether abdominal fluid has been drawn into the fume extraction port 321, such as fluid sensors or infrared sensors.

[0140] S200 If abdominal fluid is drawn into the smoke extraction port 321, the suction capacity of the smoke extraction port 321 is reduced.

[0141] The fluid channel is equipped with a control valve 440, which can be a proportional valve, a pinch valve, or similar type. The surgical unit can automatically control the opening of the control valve 440, thereby controlling the suction capacity of the smoke extraction port 321 and the pressure relief port 322 in the fluid channel. For example, if the surgical unit reduces the opening of the control valve 440, the suction capacity of the smoke extraction port 321 and the pressure relief port 322 can be reduced; if the surgical unit increases the opening of the control valve 440, the suction capacity of the smoke extraction port 321 and the pressure relief port 322 can be increased. In other possible embodiments, the fluid channel is connected to a gas source 500, and the surgical unit can also control the suction capacity of the smoke extraction port 321 and the pressure relief port 322 in the fluid channel by controlling the operating power of the gas source 500.

[0142] Specifically, if the surgical unit determines that peritoneal fluid, such as saline or blood, is being drawn into the fume extraction port 321, the surgical unit gradually reduces the opening of the control valve 440 or decreases the operating power of the gas source 500, thereby reducing the suction capacity of the fume extraction port 321. Therefore, the negative pressure in the fluid channel decreases, thus reducing the suction capacity of the fume extraction port 321 for peritoneal fluid, preventing the fume extraction port 321 from drawing away excessive peritoneal fluid for transport towards the main unit, thereby ensuring the safe operation of the main unit.

[0143] S300 determines whether the fume extraction port 321 has stopped drawing in abdominal fluid. If yes, it stops reducing the suction capacity of the fume extraction port 321; if no, it continues to reduce the suction capacity of the fume extraction port 321.

[0144] Specifically, during the process of reducing the suction capacity of the fume extraction port 321, the aforementioned sensor continuously monitors whether peritoneal fluid is being drawn into the fluid channel. If the fume extraction port 321 continues to draw peritoneal fluid into the fluid channel, the surgical unit further reduces the opening of the control valve 440 or the power of the gas source 500, thereby further reducing the suction capacity of the fume extraction port 321. This continues until the fume extraction port 321 stops drawing peritoneal fluid into the fluid channel. If the fume extraction port 321 stops drawing peritoneal fluid into the fluid channel, the surgical unit promptly stops reducing the suction capacity of the fume extraction port 321 to ensure that both the fume extraction port 321 and the pressure relief port 322 still have a significant suction capacity, thus ensuring the effective smoke extraction of the surgical instruments during the operation.

[0145] As can be seen from the above, in steps S101-S103, the surgical unit monitors the working status of the fume extraction port 321 in real time. If the fume extraction port 321 is partially or completely submerged in peritoneal fluid, the surgical unit promptly reduces the suction capacity of the fume extraction port 321 to prevent excessive delivery of peritoneal fluid into the fluid channel. Furthermore, when the suction capacity of the fume extraction port 321 is adjusted to the point where it cannot extract peritoneal fluid, the surgical unit promptly stops reducing the suction capacity of the fume extraction port 321 to ensure that both the fume extraction port 321 and the pressure relief port 322 still have a large suction capacity, thereby ensuring the fume extraction effect of the surgical instruments during the operation.

[0146] In some embodiments, see Figures 3-5 Step S100 determines whether abdominal fluid is drawn into the smoke extraction hole 321, including steps S101-S104.

[0147] S101 obtains the current first negative pressure value of the fluid channel through the first sensor 450 disposed on the fluid channel.

[0148] The first sensor 450 can be an absolute pressure sensor, but is not limited to it. In practical applications, the absolute pressure sensor can detect the negative pressure value in the fluid channel in real time.

[0149] S102 compares the first negative pressure value currently detected by the first sensor 450 with the first preset value preset by the surgical host, wherein the maximum negative pressure value of the fluid channel is less than the first preset value when the smoke extraction port 321 is not submerged in the abdominal cavity fluid.

[0150] The maximum negative pressure value of the fluid channel refers to the negative pressure value of the fluid channel when the suction port 321 is not submerged in abdominal fluid, the power of the gas source 500 is at its maximum, or the fluid channel is at its maximum flow rate. For example, the maximum negative pressure value of the fluid channel is typically tested to be between 13 kPa and 17 kPa, while the first preset value is typically set between 18 kPa and 22 kPa. Therefore, the maximum negative pressure value of the fluid channel is less than the first preset value, and the difference between the two is not less than 3 kPa. For example, the maximum negative pressure value of the fluid channel is set to 15 kPa, and the first preset value is typically set to 20 kPa. It is understood that a certain difference needs to be maintained between the two to ensure the universality of the first preset value, thereby making it applicable to the use of various surgical instruments.

[0151] Specifically, the first sensor 450 detects the first negative pressure value in the fluid channel in real time and transmits the detected first negative pressure value to the surgical host. The surgical host compares the acquired first negative pressure value with the first preset value set in the program to determine whether the suction capacity of the smoke extraction hole 321 is too large, thereby determining whether the smoke extraction hole 321 is drawing liquid into the fluid channel.

[0152] S103 If the current first negative pressure value is greater than or equal to the first preset value, then it is determined that the smoke extraction hole 321 draws abdominal fluid into the fluid channel.

[0153] Specifically, if the current first negative pressure value is greater than or equal to the first preset value, that is, the first negative pressure value is greater than the maximum negative pressure value when the fluid channel is working normally, it can be deduced that the suction capacity of the smoke extraction port 321 is large at this time and has exceeded the normal suction capacity. The surgical host defaults to the smoke extraction port 321 drawing abdominal fluid into the fluid channel. Therefore, the surgical host needs to reduce the suction capacity of the smoke extraction port 321 to avoid excessive flow of abdominal fluid into the fluid channel to ensure the safety of the host.

[0154] S104 If the first negative pressure value is less than the first preset value, it is determined that the smoke extraction hole 321 has not drawn abdominal fluid into the fluid channel.

[0155] Specifically, if the current first negative pressure value is less than the first preset value, it can be deduced that the suction capacity of the fume extraction port 321 is relatively small. The surgical unit assumes that the fume extraction port 321 is not drawing abdominal fluid into the fluid channel, and therefore there is no need to reduce the suction capacity of the fume extraction port 321. Of course, even if the current first negative pressure value is less than the first preset value, the fume extraction port 321 may still draw in a small amount of abdominal fluid. The water storage tank 410 can accommodate this portion of the abdominal fluid inflow. Therefore, the surgical unit does not reduce the suction capacity of the fume extraction port 321, and there is no need to worry about abdominal fluid flowing into the unit.

[0156] In a further embodiment, please refer to Figures 3-6 The step of determining whether the smoke extraction port 321 has stopped drawing in abdominal fluid includes steps S301 to S303.

[0157] S301 obtains the current second negative pressure value of the fluid channel through the first sensor 450 disposed on the fluid channel.

[0158] S302 compares the second negative pressure value currently detected by the first sensor 450 with a second preset value preset by the surgical host; wherein the second preset value is less than the first preset value.

[0159] S303 If the current second negative pressure value is less than the second preset value, then determine that the smoke extraction port 321 stops drawing abdominal fluid into the fluid channel.

[0160] In summary, during steps S301 to S303, as the surgical host reduces the suction capacity of the smoke extraction port 321, the first sensor 450 detects the second negative pressure value in the fluid channel in real time and transmits the detected second negative pressure value to the surgical host. The surgical host compares the acquired second negative pressure value with the second preset value pre-set in the program to determine whether the suction capacity of the smoke extraction port 321 is too large, thereby determining whether the smoke extraction port 321 is still drawing liquid into the fluid channel.

[0161] For example, if the current second negative pressure value is greater than or equal to the second preset value, it can be deduced that the suction capacity of the smoke extraction port 321 is too high. The surgical unit defaults to continuing to draw peritoneal fluid into the fluid channel through the smoke extraction port 321, thus further reducing the suction capacity of the smoke extraction port 321. If the current second negative pressure value is less than the second preset value, it can be deduced that the suction capacity of the smoke extraction port 321 is too low. The surgical unit defaults to stopping the drawing of peritoneal fluid into the fluid channel through the smoke extraction port 321, thus ceasing to reduce the suction capacity of the smoke extraction port 321. Of course, even if the current second negative pressure value is less than the second preset value, a small amount of peritoneal fluid may still be drawn into the smoke extraction port 321. The water reservoir 410 can accommodate this portion of peritoneal fluid inflow. Therefore, the surgical unit does not continue to reduce the suction capacity of the smoke extraction port 321, nor does it need to worry about peritoneal fluid flowing into the unit, thus ensuring that the smoke extraction port 321 still has a good suction effect.

[0162] Furthermore, when the smoke extraction port 321 is not submerged in the abdominal cavity fluid, the maximum negative pressure value of the fluid channel is less than the second preset value.

[0163] In practical applications, when the smoke extraction port 321 is not submerged in the peritoneal fluid, and the fluid channel reaches its maximum negative pressure or maximum flow rate, the pressure in the fluid channel is usually insufficient to draw peritoneal fluid into it. Therefore, the second preset value is set greater than the maximum negative pressure of the fluid channel and less than the first preset value. For example, the second preset value is typically set between 16 kPa and 18 kPa. This setting is appropriate, ensuring that the smoke extraction port 321 does not draw in peritoneal fluid while also ensuring that the smoke extraction port 321 has sufficient suction capacity to guarantee effective smoke extraction.

[0164] To ensure the suction capacity of the smoke extraction port 321, in some embodiments, please refer to... Figures 3-7 After the step of reducing the suction capacity of the smoke extraction port 321 is stopped, the surgical unit is also used for:

[0165] S401 obtains the current third negative pressure value of the fluid channel through the first sensor 450 disposed in the fluid channel.

[0166] S402 compares the third negative pressure value currently detected by the first sensor 450 with the third preset value preset by the surgical host, wherein the third preset value is less than the second preset value.

[0167] S403 If the current third negative pressure value is less than the third preset value, then increase the suction capacity of the fluid channel.

[0168] Specifically, when the negative pressure value of the fluid channel reaches the second negative pressure value, the surgical unit stops reducing the suction capacity of the smoke extraction port 321. However, in actual control, after the surgical unit stops reducing the suction capacity of the smoke extraction port 321, the negative pressure value of the fluid channel may still increase, and there may be a large negative pressure difference with the second negative pressure value. Consequently, the suction capacity of the smoke extraction port 321 and the pressure relief port 322 is poor.

[0169] Based on the above problems, in steps S401 to S404, after the surgical host stops reducing the suction capacity of the smoke extraction hole 321, the first sensor 450 still detects the third negative pressure value in the fluid channel in real time and transmits the detected third negative pressure value to the surgical host. The surgical host compares the acquired third negative pressure value with the third preset value set in the program to determine whether the suction capacity of the smoke extraction hole 321 is too small, and thus determines whether it is necessary to increase the suction capacity of the smoke extraction hole 321 and the pressure relief hole 322.

[0170] For example, if the current third negative pressure value is greater than or equal to the third preset value, the surgical host's default smoke extraction port 321 and pressure relief port 322 still have a strong suction capacity, which can meet the smoke extraction requirements of surgical instruments during surgery; if the current third negative pressure value is less than the third preset value, the surgical host's default smoke extraction port 321 and pressure relief port 322 have a weak suction capacity, which can no longer meet the smoke extraction requirements of surgical instruments during surgery. Therefore, the suction capacity of the smoke extraction port 321 is increased to ensure the smoke extraction effect of surgical instruments during surgery.

[0171] Furthermore, when the smoke extraction port 321 is not submerged in the abdominal cavity fluid, the maximum negative pressure value of the fluid channel is less than or equal to the third preset value.

[0172] In practical applications, when the fuming port is not submerged in the peritoneal fluid, and the fluid channel reaches its maximum negative pressure or maximum flow rate, the pressure in the fluid channel is usually insufficient to draw peritoneal fluid into it. Therefore, the maximum negative pressure in the fluid channel is less than or equal to the third preset value; for example, the second preset value is typically set at 15 kPa. This setting is appropriate, ensuring that the fuming port 321 does not draw in peritoneal fluid while the surgical instruments promptly increase the suction capacity of the fuming port 321, thus guaranteeing sufficient suction capacity for effective fumigation.

[0173] Furthermore, after increasing the suction capacity of the fluid channel, the surgical unit is also used for:

[0174] The current fourth negative pressure value or first airflow rate of the fluid channel is obtained by using the first sensor 450 and the second sensor 460 installed in the fluid channel.

[0175] The fourth negative pressure value currently detected by the first sensor 450 is compared with the fourth preset value preset by the surgical host. If the current fourth negative pressure value is greater than or equal to the fourth preset value, the increase in the suction capacity of the fluid channel is stopped; or, the first airflow rate currently detected by the second sensor 460 is compared with the first preset flow rate preset by the surgical host. If the current first airflow rate is greater than or equal to the first preset flow rate, the increase in the suction capacity of the fluid channel is stopped.

[0176] The first sensor 450 may be an absolute pressure sensor, but is not limited to only an absolute pressure sensor. The first sensor 450 is used to detect the negative pressure value in the fluid channel. The second sensor 460 may be a differential pressure sensor, but is not limited to only a differential pressure sensor. The second sensor 460 is used to detect the flow rate value in the fluid channel.

[0177] Specifically, during the process of restoring the suction capacity of the smoke extraction port 321, the first sensor 450 continuously monitors the fourth negative pressure value in the fluid channel, and the second sensor 460 continuously monitors the first airflow rate in the fluid channel. If the fourth negative pressure value in the fluid channel reaches the set requirement, the increase in the suction capacity of the smoke extraction port 321 stops; similarly, if the first airflow rate in the fluid channel reaches the set requirement, the increase in the suction capacity of the smoke extraction port 321 stops. Therefore, if either of the above two conditions is met, the increase in the suction capacity of the smoke extraction port 321 stops.

[0178] In some embodiments, see Figures 3-4 Before step S100 determines whether peritoneal fluid has been drawn into the fume extraction port 321, the surgical main unit is also used for:

[0179] A1 obtains the current second airflow rate of the fluid channel through the second sensor 460 installed in the fluid channel, and adjusts the suction capacity of the fluid channel according to the current second airflow rate so that the second airflow rate reaches the second preset flow rate preset by the surgical host.

[0180] The second sensor 460 can be a differential pressure sensor, but is not limited to it. In specific applications, the differential pressure sensor can be installed on the pipeline of the main unit 500, or on other pipelines, depending on actual needs. The differential pressure sensor is used to detect the airflow rate in the fluid channel in real time.

[0181] Accordingly, after step S100 determines whether peritoneal fluid has been drawn into the fume extraction port 321, the surgical unit is also used for:

[0182] A2 If the fluid channel does not draw in peritoneal fluid, continue to perform the process of obtaining the current second airflow rate of the fluid channel and adjust the suction capacity of the fluid channel according to the current second airflow rate so that the second airflow rate reaches the second preset flow rate preset by the surgical host.

[0183] The second preset flow rate of the surgical host can be understood as the level of the suction capacity of the fluid channel. For example, the suction capacity of the fluid channel is divided into low, medium and high levels, and different levels correspond to different second preset flow rates. If there is less smoke in the abdominal cavity, the doctor can adjust the negative suction capacity of the fluid channel to the low level. The suction capacity of the smoke extraction port 321 and the pressure relief port 322 is relatively low, which can still meet the suction effect of the smoke in the abdominal cavity. If there is more smoke in the abdominal cavity, the doctor can adjust the negative suction capacity of the fluid channel to the high level. The suction capacity of the smoke extraction port 321 and the pressure relief port 322 is stronger, which can also meet the suction effect of the smoke in the abdominal cavity.

[0184] Specifically, the fluid channel control system is divided into a flow closed-loop control system and a fluid inlet protection control system. Before the fume extraction port 321 is submerged in the peritoneal fluid, the surgical instruments use the flow closed-loop control system to control the suction capacity of the fluid delivery channel, i.e., execute steps A1 and A2. After the fume extraction port 321 is submerged in the peritoneal fluid, the surgical instruments use the fluid inlet protection control system to control the suction capacity of the fluid delivery channel, i.e., execute steps S100 to S300 and related steps, which will not be described in detail here.

[0185] In steps A1 and A2, during the application of the surgical host, the second sensor 460 acquires the current second airflow rate of the fluid channel in real time and transmits the detected second airflow rate to the surgical host. The surgical host compares the acquired second airflow rate with the second preset flow rate set in the program to determine whether the suction speed of the smoke extraction hole 321 and the pressure relief hole 322 is too high or too low, and then determines whether it is necessary to increase or decrease the suction capacity of the smoke extraction hole 321 and the pressure relief hole 322.

[0186] For example, if the current second airflow rate is greater than or equal to the second preset value, the surgical host assumes that the smoke extraction port 321 and the pressure relief port 322 have excessive suction capacity, and the surgical instrument reduces the suction capacity of the smoke extraction port 321 and the pressure relief port 322, so that the suction flow rate of the fluid channel reaches the second preset flow rate, thereby adapting to the setting adjusted by the doctor; if the current second airflow rate is less than the second preset value, the surgical host assumes that the smoke extraction port 321 and the pressure relief port 322 have insufficient suction capacity, and the surgical instrument increases the suction capacity of the smoke extraction port 321 and the pressure relief port 322, so that the suction flow rate of the fluid channel reaches the second preset flow rate, thereby adapting to the setting adjusted by the doctor.

[0187] In some embodiments, see Figures 3-4 The surgical host is also used for:

[0188] S501 determines whether the smoke extraction hole 321 has been extracted from the abdominal fluid.

[0189] S502 If the smoke extraction port 321 is withdrawn from the peritoneal fluid, the process of obtaining the current second airflow rate of the fluid channel and adjusting the suction capacity of the fluid channel according to the current second airflow rate is repeated so that the second airflow rate reaches the second preset flow rate set by the surgical host.

[0190] In steps S501 and S502, after the fume extraction port 321 is submerged in the peritoneal fluid, it is monitored in real time whether the fume extraction port 321 is withdrawn from the peritoneal fluid. If the fume extraction port 321 is withdrawn from the peritoneal fluid, the fluid channel re-enters the flow closed-loop control system, that is, the surgical host continues to execute steps A1-A2, thereby ensuring the fume extraction effect of the surgical instruments during the operation.

[0191] Further, step S501, determining whether the smoke extraction port 321 has been withdrawn from the peritoneal fluid, includes:

[0192] S5011 obtains the negative pressure change and / or flow rate change of the fluid channel through the first sensor 450 and the second sensor 460 disposed in the fluid channel.

[0193] S5012 determines whether the smoke extraction port 321 is extracted from the abdominal fluid based on the negative pressure change and / or the flow rate change.

[0194] The first sensor 450 may be an absolute pressure sensor, but is not limited to only an absolute pressure sensor. The first sensor 450 is used to detect the negative pressure value in the fluid channel. The second sensor 460 may be a differential pressure sensor, but is not limited to only a differential pressure sensor. The second sensor 460 is used to detect the flow rate value in the fluid channel.

[0195] In one application, a differential pressure sensor is installed on the fluid channel to detect the flow rate in the fluid channel. The surgical unit can determine whether the fume extraction port 321 is being drawn out based on the change in the flow rate detected by the differential pressure sensor. For example, if the flow rate in the fluid channel suddenly increases and then returns to the normal flow rate, the surgical unit defaults to drawing the abdominal fluid out of the fume extraction port 321, and the fluid channel re-enters the flow closed-loop control system to control the suction capacity of the fume extraction port 321 and the pressure relief port 322, thereby ensuring the smoke extraction effect of the surgical instruments during the operation.

[0196] In another application, an absolute pressure sensor is installed on the fluid channel to detect the pressure value in the fluid channel. The surgical unit can determine whether the fume extraction port 321 should be drawn out based on the pressure changes detected by the absolute pressure sensor. For example, if the pressure in the fluid channel suddenly changes and then returns to normal, the surgical unit defaults to drawing out the abdominal fluid from the fume extraction port 321, and the fluid channel re-enters the flow closed-loop control system to control the suction capacity of the fume extraction port 321 and the pressure relief port 322, thereby ensuring the effective smoke extraction of surgical instruments during surgery.

[0197] In other applications, both a differential pressure sensor and an absolute pressure sensor are installed on the fluid channel. The differential pressure sensor detects the flow rate in the fluid channel, and the absolute pressure sensor detects the pressure. Therefore, the surgical unit can determine whether the fume extraction port 321 is being withdrawn based on changes in the pressure detected by the differential pressure sensor and the absolute pressure sensor. For example, if the flow rate in the fluid channel suddenly increases and then returns to normal, or if the pressure in the fluid channel suddenly changes and then returns to normal, the surgical unit defaults to withdrawing the abdominal fluid from the fume extraction port 321. The fluid channel re-enters the flow closed-loop control system to control the suction capacity of the fume extraction port 321 and the pressure relief port 322, thereby ensuring effective smoke extraction of the surgical instruments during surgery.

[0198] The technical means described in this invention are not limited to those described in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications are also considered within the scope of protection of this invention.

Claims

1. A surgical instrument, characterized in that, include: A handle assembly includes a handle for gripping and a trigger capable of moving relative to the handle, the handle having a first fluid channel; A forceps assembly, including a first forceps head and a second forceps head, the first forceps head and the second forceps head being pivotable relative to each other to open or close the forceps assembly, at least one of the first forceps head and the second forceps head being configured to process biological tissue; A clamp tube assembly includes a pull rod and a clamp tube sleeved outside the pull rod, used to connect the clamp head assembly and the handle. When the trigger moves relative to the handle, the clamp head assembly moves under the action of the pull rod, which has a kinematic relationship with the trigger, so that the first clamp head and the second clamp head pivot relative to each other. A second fluid channel is formed between the outer peripheral wall of the pull rod and the inner peripheral wall of the clamp tube. The first fluid channel is connected to the second fluid channel. The clamp tube is provided with a smoke extraction hole connected to the second fluid channel. The smoke extraction hole is located close to the clamp head assembly. The clamp tube is further provided with a pressure relief hole that communicates with the second fluid channel, and the pressure relief hole is located away from the clamp head assembly; or, the handle assembly is provided with a pressure relief hole that communicates with the first fluid channel.

2. The surgical instrument according to claim 1, characterized in that, If the pressure relief hole is located in the clamp tube, the distance between the pressure relief hole and the smoke extraction hole is greater than or equal to one-tenth of the length of the clamp tube.

3. The surgical instrument according to claim 1, characterized in that, If the pressure relief hole is located in the clamp tube, the distance between the pressure relief hole and the smoke extraction hole is set to be greater than or equal to 30 mm.

4. The surgical instrument according to claim 3, characterized in that, The distance between the pressure relief hole and the smoke extraction hole is set to be greater than or equal to 50 mm.

5. The surgical instrument according to claim 1, characterized in that, If the pressure relief port is located in the forceps tube, when the forceps assembly is used in abdominal surgery, the pressure relief port is configured to be located in the abdominal cavity or in a closed space connected to the abdominal cavity.

6. The surgical instrument according to claim 1, characterized in that, The surgical instrument is used in conjunction with a puncture card. The forceps tube has an insertion section for inserting the puncture card, and the smoke extraction port and the pressure relief port are located in the insertion section. When the forceps head assembly is used in abdominal surgery, the pressure relief port is located in the abdominal cavity or in the guide channel of the puncture card.

7. The surgical instrument according to claim 1, characterized in that, Multiple smoke extraction ports are provided, and these ports are arranged sequentially along the length of the clamp tube; or... Multiple smoke extraction ports are provided, and the multiple smoke extraction ports are arranged sequentially along the circumferential direction of the clamp tube; or, The smoke extraction port is provided in multiple sets, and the multiple sets of smoke extraction ports are arranged sequentially along the circumferential direction of the clamp tube. Each set of smoke extraction ports includes multiple smoke extraction ports and is arranged sequentially along the length direction of the clamp tube.

8. The surgical instrument according to claim 1, characterized in that, If the pressure relief hole is provided in the clamp tube, there are multiple pressure relief holes, and the multiple pressure relief holes are arranged sequentially along the circumferential direction of the clamp tube.

9. The surgical instrument according to claim 1, characterized in that, The pressure relief hole is elastically equipped with a one-way flow device. When the smoke extraction hole is submerged in abdominal fluid, the one-way flow device can automatically open under the action of external air pressure.

10. The surgical instrument according to claim 7, characterized in that, The one-way flow device is a one-way diaphragm disposed at the pressure relief hole.

11. A surgical system, characterized in that, include: The surgical instrument according to any one of claims 1 to 10; The liquid collection device includes a water storage tank and a filter element. The water storage tank is connected to the first fluid channel and is used to collect intra-abdominal fluid flowing into the third fluid channel. The filter element is located on the exhaust path of the water storage tank and is used to filter and purify the gas flowing out of the water storage tank.

12. The surgical system according to claim 11, characterized in that, The surgical system also includes a main unit, which has a third fluid channel and a control valve on the third fluid channel to control the suction capacity of the smoke extraction port and the pressure relief port.

13. The surgical system according to claim 11, characterized in that, The host includes: A sensor is installed on the delivery path of the third fluid channel to detect the flow rate and / or negative pressure value in the third fluid channel; The control module controls the suction capacity of the smoke extraction port and the pressure relief port based on the flow rate value and / or the negative pressure value.

14. The surgical system according to claim 13, characterized in that, The sensor includes a first sensor and a second sensor disposed in the third fluid channel. The first sensor is used to detect the negative pressure value in the third fluid channel, and the second sensor is used to detect the flow rate value in the third fluid channel.

15. A surgical system, characterized in that, include: A surgical instrument includes a handle assembly, a forceps head assembly, and a forceps tube assembly. The handle assembly includes a handle for gripping and a trigger movable relative to the handle, the handle having a first fluid channel. The forceps head assembly includes a first forceps head and a second forceps head, the first and second forceps heads being pivotable relative to each other to open or close the forceps head assembly, at least one of the first and second forceps heads being configured to process biological tissue. The forceps tube assembly includes a lever and a forceps tube sleeved outside the lever for connecting the forceps head assembly and the handle. When the trigger moves relative to the handle, the forceps head assembly moves under the action of the lever, which has a kinematic relationship with the trigger, so that the first and second forceps heads pivot relative to each other. A second fluid channel is formed between the outer peripheral wall of the lever and the inner peripheral wall of the forceps tube, the first fluid channel communicating with the second fluid channel, and the forceps tube having a fume extraction hole communicating with the second fluid channel, the fume extraction hole being located close to the forceps head assembly. A liquid collection device is provided with a liquid collection channel, and the handle assembly is provided with a first pipe connected to the liquid collection channel; The main unit is provided with a third fluid channel. The liquid collection device is detachably installed on the main unit so that the liquid collection channel is connected to the third fluid channel. The main unit is provided with a second pipe connected to an external air source. The second pipe is connected to the third fluid channel. The first pipe, the second pipe, the liquid collection channel, or the third fluid channel are provided with pressure relief holes.

16. A surgical system, characterized in that, The surgical system includes a surgical unit and surgical instruments. The surgical instruments are provided with a fluid channel, and the fluid channel is provided with a smoke extraction port and a pressure relief port spaced apart. The surgical unit is used for: Determine whether abdominal fluid has been drawn into the smoke extraction port; If abdominal fluid is drawn into the fume extraction port, the suction capacity of the fume extraction port will be reduced. Determine whether the suction port has stopped drawing in abdominal fluid. If yes, stop reducing the suction capacity of the suction port; if no, continue reducing the suction capacity of the suction port.

17. The surgical system according to claim 16, characterized in that, The step of determining whether abdominal fluid has been drawn into the fume extraction port includes: The first sensor installed on the fluid channel is used to obtain the current first negative pressure value of the fluid channel; The first negative pressure value currently detected by the first sensor is compared with the first preset value preset by the surgical host, wherein the maximum negative pressure value of the fluid channel is less than the first preset value when the smoke extraction port is not submerged in the peritoneal fluid; If the current first negative pressure value is greater than or equal to the first preset value, then it is determined that the smoke extraction port draws abdominal fluid into the fluid channel; If the first negative pressure value is less than the first preset value, it is determined that the smoke extraction port has not drawn abdominal fluid into the fluid channel.

18. The surgical system according to claim 16, characterized in that, The step of determining whether the suction port has stopped drawing abdominal fluid includes: The current second negative pressure value of the fluid channel is obtained by a first sensor installed on the fluid channel; The second negative pressure value currently detected by the first sensor is compared with a second preset value preset by the surgical host; wherein the second preset value is less than the first preset value; If the current second negative pressure value is less than the second preset value, then it is determined that the smoke extraction port will stop drawing abdominal fluid into the fluid channel.

19. The surgical system according to claim 18, characterized in that, When the smoke extraction port is not submerged in the abdominal cavity fluid, the maximum negative pressure value of the fluid channel is less than the second preset value.

20. The surgical system according to claim 18, characterized in that, After the reduction of the suction capacity of the smoke extraction port is stopped, the surgical unit is also used for: The current third negative pressure value of the fluid channel is obtained by a first sensor installed in the fluid channel; The third negative pressure value currently detected by the first sensor is compared with the third preset value preset by the surgical host, wherein the third preset value is less than the second preset value; If the current third negative pressure value is less than the third preset value, the suction capacity of the fluid channel is increased.

21. The surgical system according to claim 20, characterized in that, When the smoke extraction port is not submerged in the abdominal cavity fluid, the maximum negative pressure value of the fluid channel is less than or equal to the third preset value.

22. The surgical system according to claim 20, characterized in that, After increasing the suction capacity of the fluid channel, the surgical unit is also used for: The current fourth negative pressure value or first airflow rate of the fluid channel is obtained by using the first and second sensors installed in the fluid channel; The fourth negative pressure value currently detected by the first sensor is compared with the fourth preset value preset by the surgical host. If the current fourth negative pressure value is greater than or equal to the fourth preset value, the suction capacity of the fluid channel is stopped. or, The first airflow rate currently detected by the second sensor is compared with the first preset flow rate preset by the surgical host. If the current first airflow rate is greater than or equal to the first preset flow rate, the suction capacity of the fluid channel is stopped.

23. The surgical system according to claim 16, characterized in that, Before determining whether peritoneal fluid has been drawn in through the fume extraction port, the surgical unit is also used for: The current second airflow rate of the fluid channel is obtained by a second sensor installed in the fluid channel, and the suction capacity of the fluid channel is adjusted according to the current second airflow rate so that the second airflow rate reaches the second preset flow rate preset by the surgical host. Accordingly, after determining whether peritoneal fluid has been drawn into the fume extraction port, the surgical main unit is also used for: If the fluid channel does not draw in peritoneal fluid, continue to obtain the current second airflow rate of the fluid channel and adjust the suction capacity of the fluid channel according to the current second airflow rate so that the second airflow rate reaches the second preset flow rate preset by the surgical host.

24. The surgical system according to claim 23, characterized in that, The surgical unit is also used for: Determine whether the smoke extraction port has been drawn out of the abdominal fluid; If the suction port is withdrawn from the peritoneal fluid, the process of obtaining the current second airflow rate of the fluid channel and adjusting the suction capacity of the fluid channel according to the current second airflow rate is performed so that the second airflow rate reaches the second preset flow rate preset by the surgical host.

25. The surgical system according to claim 24, characterized in that, The determination of whether the extraction port has been withdrawn from the peritoneal fluid includes: The negative pressure change and / or flow rate change of the fluid channel are obtained by using the first sensor and the second sensor installed in the fluid channel; Whether the smoke extraction port is drawn out of the abdominal fluid is determined based on the negative pressure change and / or the flow rate change.

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