Intracavitary gas self-circulating filtration device for laparoscopic surgery and laparoscope having same

Abstract

An intracavitary gas self-circulating filtration device for laparoscopic surgery, comprising: a first filter part (1) having a first filter part gas inlet (102) and a first filter part gas outlet (103), the first filter part gas inlet being in communication with the abdominal cavity of the human body; a power part (2) connected to the first filter part and having a power part gas inlet (203) and a power part gas outlet (202), the power part gas inlet being in communication with the first filter part through the first filter part gas outlet, and the power part gas outlet being in communication with the abdominal cavity of the human body; a housing (5) having an opening and an internal space that is in communication with the outside, and accommodating the first filter part and the power part within the internal space; and at least one second filter part (1005) that is in communication with at least one of the first filter part gas inlet and the power part gas outlet. The intracavity gas self-circulating filtration device has the advantages of contamination prevention and high durability.

Description

Intracavitary gas self-circulation filtration device for laparoscopic surgery and laparoscope equipped with it Technical Field

[0001] This application relates to the field of medical device technology, and particularly to the field of laparoscopy, specifically providing an intracavitary gas self-circulation filtration device for laparoscopic surgery and a laparoscope equipped with the same. Background Technology

[0002] Minimally invasive surgery involves making multiple or single perforations on the outside of the body to allow an endoscope and surgical instruments to enter the body cavity. Under endoscopic guidance, the surgeon manipulates the handle of a long-handled instrument outside the patient's body while the instrument head inside the body performs procedures such as lesion removal and suturing. After surgery, the endoscope and instruments are removed, the perforations on the patient's body are sutured, and the surgery is completed, minimizing damage to the patient's healthy tissues. The medical instruments used in this procedure are commonly referred to as laparoscopic surgical instruments or laparoscopic electrodes. These instruments primarily consist of a handle for the operator to grip, a slender rod that can be inserted into the body cavity, and a movable end effector (such as a scalpel, scissors, forceps, grasping instruments, cauterization tools, etc.).

[0003] During laparoscopic surgery, the use of electrocautery devices for cutting or electrocoagulation generates a large amount of smoke. This smoke can blur the endoscope, causing the content displayed on the monitor in the imaging system to become unclear. This is a problem faced by laparoscopic surgery and requires equipment to clear the smoke.

[0004] The commonly used method for smoke removal is to use negative pressure equipment in hospitals to extract the smoke. Most of the extracted smoke is CO2 and odorous fumes, which are then directly released. This not only causes air pollution but also lowers the pressure inside the abdominal cavity, making it unsuitable for the space required for surgery and directly affecting the success of the operation. Summary of the Invention

[0005] To address the problems existing in the prior art, this application provides an intracavitary gas self-circulation filtration device for laparoscopic surgery and a laparoscope equipped with the same. The intracavitary gas self-circulation filtration device is equipped with a filtration system, and the entire filtration system is not reused, thus avoiding cross-infection between different patients; and the filtered gas can be circulated into the cavity, reducing the amount of gas used.

[0006] In a first aspect, some embodiments of this application provide an intracavitary gas self-circulating filtration device for laparoscopic surgery, comprising: a first filter section having a first filter section inlet and a first filter section outlet, the first filter section inlet communicating with the human abdominal cavity; a power section connected to the first filter section and having a power section inlet and a power section outlet, the power section inlet communicating with the first filter section through the first filter section outlet, the power section outlet communicating with the human abdominal cavity; a housing having an opening and an internal space communicating with the outside and accommodating the first filter section and the power section within the internal space; and at least one second filter section communicating with at least one of the first filter section inlet and the power section outlet.

[0007] The embodiments of this application, by providing a first filter section and at least one second filter section, enable filtration to be performed using the second filter section even if the filter element of the first filter section is exhausted and fails during the operation, thereby improving the reliability and durability of the intracavitary gas self-circulation filtration device.

[0008] In some embodiments, the first filter section has a connecting groove on the side opposite to the power section; the power section has at least one snap fastener on the side opposite to the first filter section; the first filter section and the power section are connected by engaging the connecting groove and the snap fastener.

[0009] In some embodiments, the first filter portion has a slot on the side opposite to the housing; the housing has a latch at a position corresponding to the slot on the inner side of the side opposite to the first filter portion; the first filter portion can be limited by the latch and the slot so that the first filter portion cannot be detached from the housing.

[0010] In some embodiments, the housing includes a positioning detection unit for detecting whether the first filter unit is installed in the housing; the positioning detection unit includes a contact located at the bottom of the housing and pressed by the first filter unit when the first filter unit is installed in the housing, thereby sending a signal to indicate that the first filter unit is installed in the housing.

[0011] In some embodiments, the power unit includes a power head assembly, the drive shaft of which is provided with a connection interface and connected to the motor shaft of a motor located outside the housing.

[0012] In some embodiments, the head structure of the drive shaft of the power head assembly is a cross structure, and it is connected to the cross structure of the motor shaft of the motor.

[0013] In some embodiments, the power head assembly internally comprises a diaphragm structure, an umbrella-shaped support frame, and an inclined shaft structure; the drive shaft of the power head assembly is connected to the inclined shaft structure; the drive shaft of the power head assembly is mounted on a shaft mounting seat disposed outside the power head assembly via bearings; and a seal is formed between the power head assembly and the shaft mounting seat by sequentially providing an end face sealing gasket, an end face sealing ring, and a shaft rotation seal in a direction away from the power head assembly.

[0014] In some embodiments, a heat insulation structure is provided around the pipeline at the air outlet of the power unit, and the heat insulation structure is provided with heat insulation material.

[0015] In some embodiments, the intracavitary gas self-circulation filtration device further includes a gas pressure detection device, which includes: a first gas flow sensor disposed near the air inlet of the first filter section and detecting in real time the flow rate of the incoming gas flowing through the air inlet of the first filter section per unit predetermined time; a second gas flow sensor disposed near the air outlet of the power section and detecting in real time the flow rate of the outgoing gas flowing through the air outlet of the power section per unit predetermined time; and a control unit disposed in the housing and controlling the speed of air extraction from the human abdominal cavity based on the ratio of the volume of extracted gas calculated from the inlet gas flow rate detected by the first gas flow sensor to the volume of delivered gas calculated from the outgoing gas flow rate detected by the second gas flow sensor.

[0016] Secondly, some embodiments of this application provide a laparoscopy, including: the aforementioned intracavitary gas self-circulating filter device; a first puncture device, which is connected to the intracavitary gas self-circulating filter device and inserted into the human abdominal cavity; and a second puncture device, which is connected to the intracavitary gas self-circulating filter device and inserted into the human abdominal cavity; one of the first puncture device and the second puncture device draws air from the human abdominal cavity, and the other of the first puncture device and the second puncture device blows air into the human abdominal cavity, forming a clear surgical field area as an air curtain barrier area near the air outlet.

[0017] This application provides an intracavitary gas self-circulation filtration device for laparoscopic surgery. By setting a first filter and at least one second filter, the device can continue filtration even if the filter element of the first filter is exhausted and fails during surgery, thereby improving the reliability of the intracavitary gas self-circulation filtration device. Furthermore, this intracavitary gas self-circulation filtration device is equipped with a filtration system that is not reused, thus avoiding cross-infection between different patients; and the filtered gas can be circulated back into the cavity, reducing the amount of gas used.

[0018] Furthermore, the intracavitary gas self-circulation filtration device for laparoscopic surgery provided in this application has the following advantages: it is easy for medical staff to use and operate during laparoscopic surgery; the intracavitary gas pressure is highly stable and the gas circulation filtration effect is good throughout the entire operation, improving surgical efficiency and quality; through the smoke extraction and filtration structure, the method of quickly removing surgical smoke from the intracavitary cavity achieves clear visualization of the surgical endoscope display system; through the designed disposable core module, zero infection is achieved in laparoscopic surgery; and the gas filtration and self-circulation device reduce the amount of gas used, saving surgical costs. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 is a schematic diagram of the laparoscope with an intracavitary gas self-circulation filtration device involved in this application;

[0022] Figure 2 is an overall perspective view of the housing of the intracavitary gas self-circulation filtration device for laparoscopic surgery involved in this application;

[0023] Figure 3 is a cross-sectional view of the second filter section in the intracavitary gas self-circulation filter device for laparoscopic surgery involved in this application;

[0024] Figure 4 is a three-dimensional sectional view of the second filter section in the intracavitary gas self-circulation filter device for laparoscopic surgery involved in this application.

[0025] Figure 5 is a schematic diagram of the self-circulating gas flow in the intracavitary gas self-circulating filtration device for laparoscopic surgery involved in this application.

[0026] Figure 6 is an overall assembly diagram of the housing of the intracavitary gas self-circulation filtration device for laparoscopic surgery involved in this application;

[0027] Figure 7 is a schematic diagram of gas flow inside the housing of the intracavitary gas self-circulation filtration device for laparoscopic surgery involved in this application;

[0028] Figure 8 is a schematic diagram of the separation of the first filter section and the power section of the intracavitary gas self-circulation filtration device for laparoscopic surgery involved in this application.

[0029] Figure 9 is another schematic diagram showing the separation of the first filter section and the power section of the intracavitary gas self-circulation filtration device for laparoscopic surgery involved in this application.

[0030] Figure 10 is a schematic diagram of the connection state between the first filter section and the power section of the intracavitary gas self-circulation filtration device for laparoscopic surgery involved in this application.

[0031] Figure 11 is a rear view of the first filter section and the power section of the intracavitary gas self-circulation filtration device for laparoscopic surgery involved in this application.

[0032] Figure 12 is a diagram of the internal structure of the housing of the intracavitary gas self-circulation filtration device for laparoscopic surgery involved in this application;

[0033] Figure 13 is a schematic diagram of the power head assembly of the intracavitary gas self-circulation filtration device for laparoscopic surgery involved in this application;

[0034] Figure 14 is a perspective view of the power head assembly of the intracavitary gas self-circulation filtration device for laparoscopic surgery involved in this application.

[0035] Figure 15 is a structural and cross-sectional view of the motor module of the intracavitary gas self-circulation filtration device for laparoscopic surgery involved in this application;

[0036] Figure 16 is a distal cross-sectional view of the first puncture device in the laparoscopy involved in this application;

[0037] Figure 17 is a cross-sectional view of the first puncture device in the laparoscopy involved in this application.

[0038] In the diagram: 1-First filtration unit, 2-Power unit, 3-Motor, 4-Position detection unit, 5-Housing, 6-Locking unit, 7-First puncture device, 8-Surgical instrument, 9-Endoscope, 101-Filter element structure, 102-Air inlet of first filtration unit, 103-Air outlet of first filtration unit, 104-Slot, 105-Anti-misinstallation slot, 106-Connecting slot, 110-First gas flow sensor, 201-Power head assembly, 202-Air outlet of power unit, 203-Power 204-Clasp, 205-Power unit limiting sleeve, 206-Insulation structure, 210-Second gas flow sensor, 301-Motor bushing, 302-Motor shaft, 401-Contact, 501-Protrusion, 601-Clasp, 701-Second puncture device, 1001-Laparoscope, 1002-Airflow direction, 1003-Human abdominal cavity, 1003A-Clear surgical field area, 1004-Tubing, 1005-Second filter, 2010-Power unit Head assembly air outlet, 2011-Connecting pipe port, 2012-Diaphragm structure, 2012A-Umbrella-shaped support frame, 2012B-Inclined shaft structure, 2013-Power head assembly connecting shaft, 2014-Cover plate, 2015-Shaft mounting seat, 2016-Bearing, 2017-Drive shaft, 2017A-Cross structure, 2018-End face sealing ring, 2019-End face sealing gasket, 2019A-Shaft rotary seal, 7001-Airflow channel, 7002-Support partition Plate, 7003-First sealing part, 7004-Second sealing part, 7005-Airflow inlet / outlet, 7006-Instrument inlet, 10051-Air inlet of second filter section, 10052-Liquid leakage valve cover, 10053-Guide cone plate, 10054-Guide fan blade, 10055-Liquid leakage channel, 10056-Liquid storage space, 10057-Filter element layer, 10058-Air outlet of second filter section, 10059-Airflow direction of second filter section. Detailed Implementation

[0039] To better understand the above-mentioned objectives, features, and advantages of this application, embodiments of this application will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0040] Many specific details are set forth in the following description in order to provide a full understanding of this application, but this application may also be implemented in other ways than those described herein; obviously, the embodiments in the specification are only some embodiments of this application, and not all embodiments.

[0041] To address the aforementioned technical issues of avoiding contamination and ensuring reliability and durability, embodiments of this application provide an intracavitary gas self-circulating filtration device for laparoscopic surgery, comprising: a first filter section having a first filter section inlet and a first filter section outlet, the first filter section inlet communicating with the human abdominal cavity; a power section connected to the first filter section and having a power section inlet and a power section outlet, the power section inlet communicating with the first filter section through the first filter section outlet, the power section outlet communicating with the human abdominal cavity; a housing having an opening and an internal space communicating with the outside and housing the first filter section and the power section within the internal space; and at least one second filter section communicating with at least one of the first filter section inlet and the power section outlet.

[0042] It is understood that the intracavitary gas self-circulation filtration device for laparoscopic surgery provided by the embodiments of this application can effectively improve the technical defects of filtration devices using related technologies.

[0043] The above-described intracavitary gas self-circulating filtration device and laparoscope equipped with it are illustrated below with reference to Figures 1-17, and the structures of the intracavitary gas self-circulating filtration device and laparoscope are also illustrated. It should be noted that those skilled in the art can design devices and equipment different from those shown in Figures 1-17 based on the concept of the above-described intracavitary gas self-circulating filtration device and laparoscope according to specific needs.

[0044] First, the corresponding parts or units in Figures 1-17 will be briefly introduced with reference to the accompanying reference numerals.

[0045] Reference numeral 1 denotes the first filter section, which is a filter cartridge compartment containing filter elements; reference numeral 2 denotes the power section, which is a power module; reference numeral 3 denotes the motors, which transmit power to the power section; reference numeral 4 denotes the positioning detection section, which is a positioning detection module used to detect whether the first filter section (filter cartridge compartment) is installed in place; reference numeral 5 denotes the housing, which serves as a compartment for housing the first filter section (filter cartridge compartment) and the power section (power module); reference numeral 6 denotes the locking section, which is a locking module that secures the first filter section and the power section together to form a core module within the housing to prevent the core module from moving out; reference numeral 7 denotes the first puncture device; reference numeral 8 denotes the hand. Surgical instruments; reference numeral 9 is used to characterize an endoscope; reference numeral 101 is used to characterize a filter element structure, which is a filter element module and may include a pre-filter layer, an adsorption layer, an ultra-high efficiency filter layer, etc.; reference numeral 102 is used to characterize the air inlet of the first filter section; reference numeral 103 is used to characterize the air outlet of the first filter section; reference numeral 104 is used to characterize a slot; reference numeral 105 is used to characterize an anti-misinstallation slot; reference numeral 106 is used to characterize a connecting slot; reference numeral 110 is used to characterize a first gas flow sensor; reference numeral 201 is used to characterize a power head assembly; reference numeral 202 is used to characterize the air outlet of the power section; reference numeral 203 is used to characterize the air inlet of the power section; reference numeral 204 is used to characterize a buckle; reference numeral 205 is used to characterize a power section limiting sleeve. Reference numeral 206 is used to characterize the thermal insulation structure; reference numeral 210 is used to characterize the second gas flow sensor; reference numeral 301 is used to characterize the motor bushing; reference numeral 302 is used to characterize the motor shaft; reference numeral 401 is used to characterize the contact point; reference numeral 501 is used to characterize the protrusion; reference numeral 601 is used to characterize the latch; reference numeral 701 is used to characterize the second puncture device; reference numeral 1001 is used to characterize the laparoscope; reference numeral 1002 is used to characterize the airflow direction; reference numeral 1003 is used to characterize the human abdominal cavity; reference numeral 1003A is used to characterize the clearly defined surgical field area; reference numeral 1004 is used to characterize the tubing; reference numeral 1005 is used to characterize the second filter section; reference numeral 2010 is used to characterize the power head assembly. Air outlet; Reference numeral 2011 denotes the connecting pipe port; Reference numeral 2012 denotes the diaphragm structure; Reference numeral 2012A denotes the umbrella-shaped support frame; Reference numeral 2012B denotes the inclined shaft structure; Reference numeral 2013 denotes the power head assembly connecting shaft; Reference numeral 2014 denotes the cover plate; Reference numeral 2015 denotes the shaft mounting seat; Reference numeral 2016 denotes the bearing; Reference numeral 2017 denotes the drive shaft; Reference numeral 2017A denotes the cross structure; Reference numeral 2018 denotes the end face sealing ring; Reference numeral 2019 denotes the end face sealing gasket; Reference numeral 2019A denotes the shaft rotary seal; Reference numeral 7001 denotes the airflow channel;Reference numeral 7002 denotes a supporting partition; reference numeral 7003 denotes a first sealing part; reference numeral 7004 denotes a second sealing part; reference numeral 7005 denotes an airflow inlet / outlet; reference numeral 7006 denotes an instrument inlet; reference numeral 10051 denotes an air inlet for the second filter section; reference numeral 10052 denotes a liquid leakage valve cover; reference numeral 10053 denotes a guide cone; reference numeral 10054 denotes a guide fan blade; reference numeral 10055 denotes a liquid leakage channel; reference numeral 10056 denotes a liquid storage space; reference numeral 10057 denotes a filter element layer; reference numeral 10058 denotes an air outlet for the second filter section; reference numeral 10059 denotes the airflow direction of the second filter section.

[0046] Secondly, the cavity gas self-circulation filtration device of some embodiments of this application will be illustrated by way of example with reference to the above-mentioned reference numerals.

[0047] As shown in Figures 1 and 2, the intracavitary gas self-circulation filtration device for laparoscopic surgery involved in this application includes: a first filter section 1, which has a first filter section inlet 102 and a first filter section outlet 103, the first filter section inlet 102 being connected to the human abdominal cavity 1003; a power section 2, which is connected to the first filter section 1 and has a power section inlet 203 and a power section outlet 202, the power section inlet 203 being connected to the first filter section 1 through the first filter section outlet 103, the power section outlet 202 being connected to the human abdominal cavity; a housing 5, which has an opening and an internal space communicating with the outside and accommodates the first filter section 1 and the power section 2 in the internal space; and at least one second filter section 1005, which is connected to at least one of the first filter section inlet 102 and the power section outlet 202.

[0048] The intracavitary gas self-circulating filtration device of this application includes a housing 5 serving as a chamber. The housing 5 shown in Figure 2 is rectangular, but not limited to this; other shapes such as cylindrical can also be used. A first filter section 1 (filter cartridge chamber) and a power unit 2 (power module) are installed in the housing 5, which is connected to the power unit 2 and integrated as a single-use core module. The housing 5 (chamber) serves as a fixed chamber for the single-use core module, primarily for positioning and storage, and can fix the first filter section 1 (filter cartridge chamber) in place. The filter element structure 101 of the first filter section 1 can be provided with filter media structures such as a pre-filtration layer, an adsorption layer, and an ultra-high efficiency filtration layer. At the bottom of the first filter section 1, a connecting pipe 2011 is provided, communicating with the air outlet 103 of the first filter section and connected to the air inlet 203 of the power unit 2. Here, the aforementioned core module has a square structure, but a circular structure can also be used.

[0049] Here, there can be one second filter unit 1005, connected only to the air inlet 102 of the first filter unit or the air outlet 202 of the power unit. There can also be two second filter units 1005 (as shown in Figure 1), connected to the air inlet 102 of the first filter unit and the air outlet 202 of the power unit, respectively. Furthermore, there can be three or more second filter units 1005, connected equally or unevenly to the air inlet 102 of the first filter unit and / or the air outlet 202 of the power unit. The second filter unit 1005 can also be a disposable module. The second filter unit 1005 can be directly connected to the air inlet 102 of the first filter unit and / or the air outlet 202 of the power unit (as shown in Figure 1), or it can be connected to the air inlet 102 of the first filter unit and / or the air outlet 202 of the power unit through pipelines and switching valves, etc., without particular limitation. For example, the second filter section 1005 can be connected to the air inlet 102 of the first filter section and / or the air outlet 202 of the power section via a switching valve. Normally, the switching valve is closed, and gas from the abdominal cavity 1003 does not pass through the second filter section 1005 but only through a pipeline connected in parallel with the second filter section 1005. However, when the filter material in the first filter section 1 is exhausted during surgery and cannot perform its filtering function, the user (e.g., a doctor) can open the switching valve to allow gas from the abdominal cavity 1003 to pass through the second filter section 1005, thereby allowing the second filter section 1005 to perform the filtering function in place of the first filter section 1. Furthermore, in the case of multiple second filter sections 1005, each second filter section 1005 can be specially configured with filter material for different specific components in the gas (e.g., smoke) expelled from the abdominal cavity 1003. For example, two second filter sections 1005 are provided. One second filter section 1005 has a particularly good filtering and absorption effect on component A (e.g., blood) in the gas discharged from the human abdominal cavity 1003, and the other second filter section 1005 has a particularly good filtering and absorption effect on component B (e.g., grease) in the gas discharged from the human abdominal cavity 1003 (e.g., smoke).

[0050] As shown in Figure 3, the second filter section 1005 includes: a second filter section air inlet 10051; a liquid leakage valve cover 10052; a guide cone 10053; a guide fan blade 10054; a liquid leakage channel 10055; a liquid storage space 10056; a filter element layer 10057; and a second filter section air outlet 10058. Furthermore, in Figure 3, the arrow indicates the airflow direction 10059 of the second filter section 1005.

[0051] In addition, the filter element layer 10057 of the second filter section 1005 can adopt the same structure as the filter element structure 101 of the first filter section 1.

[0052] Referring to Figures 3 and 4, the working principle of the second filter section 1005 is explained as follows: Gas containing, for example, smoke, discharged from the abdominal cavity 1003 enters the second filter section 1005 through the air inlet 10051; guided by the guide cone 10053, it passes through the guide fan 10054, causing the guide fan 10054 to rotate and thus forming a swirling effect; this swirling effect centrifugally separates large particles of smoke, water droplets, and oil droplets contained in the gas, and the separated liquid accumulates on the inner wall of the second filter section 1005 and flows into the liquid storage space 10056 (the liquid can be discharged from the liquid leakage channel 10055 by opening the liquid leakage valve cover 10052); the gas (which may contain smoke) after passing through the guide fan 10054 continues to pass through the filter element layer 10057 and flows out from the air outlet 10058 of the second filter section, thus performing the filtration performed by the second filter section 1005.

[0053] Figure 5 shows the overall gas self-circulation path diagram of the internal gas self-circulation filtration device. As shown in Figure 5, the first filter section 1 in the disposable core module is provided with an air inlet channel, which is connected to the human abdominal cavity 1003 through, for example, pipe 1004 (which, if connected to the second filter section 1005, also passes through the second filter section 1005 as needed); the power section 2 is provided with an exhaust channel, which is connected to the human abdominal cavity 1003 through pipe 1004 (which, if connected to the second filter section 1005, also passes through the second filter section 1005 as needed); and the first filter section 1 is connected to the power section 2; during the self-circulating smoke exhaust process, when a laparoscopic surgery is performed using an active instrument (e.g., surgical instrument 8), gas containing, for example, smoke will be generated. The cavity gas self-circulating filtration device draws the gas containing, for example, smoke into the first filter section 1 through pipe 1004. After being filtered by the filter element in the first filter section 1, the gas passes through the power section 2 and is then sent into the human abdominal cavity 1003 through pipe 1004, forming a self-circulating gas filtration system.

[0054] In summary, the specific connections are as follows: The first filter inlet 102 of the first filter section 1 is connected to the second filter section 1005, which is connected to the first puncture device 7 of the laparoscope 1001 via a pipe 1004 and then into the human abdominal cavity 1003. The power outlet 202 of the power section 2 is connected to the second filter section 1005, which is connected to the second puncture device 701 of the laparoscope 1001 via a pipe 1004 and then into the human abdominal cavity 1003 (see Figure 1).

[0055] As shown in Figure 6, an insulation structure 206 is provided around the pipeline at the power unit outlet 202 of the power unit 2, and insulation material is provided in the insulation structure 206.

[0056] That is, as shown in Figure 6, a heat insulation structure 206 is provided around the pipe at the power outlet 202 of the power unit 2 (power module) (for example, in the entire circumferential direction). The heat insulation structure 206 is provided with heat insulation material, which can keep the gas warm and keep the gas temperature constant.

[0057] As shown in Figure 6, the intracavitary gas self-circulation filtration device also includes a gas pressure detection device, which includes: a first gas flow sensor 110, which is located near the air inlet 102 of the first filter section and detects the flow rate of the incoming gas flowing through the air inlet 102 of the first filter section in real time; a second gas flow sensor 210, which is located near the air outlet 202 of the power section and detects the flow rate of the outgoing gas flowing through the air outlet 202 of the power section in real time; and a control unit (not shown), which is located in the housing 5 and controls the speed of air extraction from the human abdominal cavity 1003 based on the ratio of the volume of extracted gas calculated from the incoming gas flow rate detected by the first gas flow sensor 110 to the volume of delivered gas calculated from the outgoing gas flow rate detected by the second gas flow sensor 210. That is, when the ratio of the volume of gas extracted (calculated from the inlet gas flow rate detected by the first gas flow sensor 110) to the volume of gas supplied (calculated from the outlet gas flow rate detected by the second gas flow sensor 210) is approximately 1, it indicates that the amount of gas extracted from the abdominal cavity 1003 per unit time is roughly equal to the amount of gas supplied to the abdominal cavity 1003, and the pressure inside the abdominal cavity 1003 can be considered to remain approximately constant, at atmospheric pressure; when the ratio of the volume of gas extracted (calculated from the inlet gas flow rate detected by the first gas flow sensor 110) to the volume of gas supplied (calculated from the outlet gas flow rate detected by the second gas flow sensor 210) is greater than, for example, 1.1 (this threshold can be freely set according to actual conditions, and can also be set to values ​​such as 1.05, 1.15, 1.2, etc.), it can be considered that... It is assumed that the pressure inside the abdominal cavity 1003 has decreased due to the removal of a large amount of gas, and is in a low-pressure state. Therefore, it is necessary to reduce the speed of gas extraction from the abdominal cavity 1003 to restore the pressure inside the abdominal cavity 1003 to normal pressure. When the ratio of the volume of gas extracted (calculated from the inlet gas flow rate detected by the first gas flow sensor 110) to the volume of gas delivered (calculated from the outlet gas flow rate detected by the second gas flow sensor 210) is less than, for example, 0.9 (this threshold can be freely set according to the actual situation, and can also be set to 0.95, 0.85, 0.8, etc.), it can be assumed that the pressure inside the abdominal cavity 1003 has increased due to the delivery of a large amount of gas, and is in a high-pressure state. Therefore, it is necessary to increase the speed of gas extraction from the abdominal cavity 1003 to restore the pressure inside the abdominal cavity 1003 to normal pressure.

[0058] Of course, the structure of the air pressure detection device is not limited to the above structure. The following structure can also be used: air pressure sensors are installed near the air inlet 102 of the first filter section and near the air outlet 202 of the power section. The air pressure sensors reflect the real-time pressure. Then, the pressure values ​​are compared by software. The air pressure regulating valves of the air inlet 102 of the first filter section and the air outlet 202 of the power section are controlled by the programmable logic controller (PLC) to achieve air pressure balance between the inlet and outlet, and to achieve the same air pressure value between the inlet and outlet, thus achieving a self-circulating effect of air pressure balance.

[0059] As shown in Figure 7, in the housing 5 of the gas self-circulation filtration device, the direction of gas flow is as shown by the arrow in the figure. The gas flows out from the human abdominal cavity 1003 and enters the first filter section 1. After being filtered by the filter element of the first filter section 1, the gas flows into the power section 2, then flows out of the power section 2 through the internal pipeline, and finally enters the human abdominal cavity 1003 again.

[0060] As shown in Figures 8, 9, and 10, the first filter unit 1 has a connecting groove 106 on the side opposite to the power unit 2; the power unit 2 has at least one snap fastener 204 on the side opposite to the first filter unit 1; the first filter unit 1 and the power unit 2 are connected as one unit by engaging the connecting groove 106 and the snap fastener 204 (see Figure 10). Here, the number of snap fasteners 204 can be one, two, three, four, or more.

[0061] Furthermore, as shown in Figures 8, 9 and 11, the connection and fixation are achieved through a snap-fit ​​structure consisting of a connecting groove 106 and a snap-fit ​​204 (Figures 8 and 9). At the same time, the air outlet 103 of the first filter section is connected to the air inlet 203 of the power section (Figure 11), thereby connecting the first filter section 1 and the power section 2.

[0062] As shown in Figures 9 and 12, the anti-misfit mounting groove 105 and the protrusion 501 of the housing 5 work together. The core module can only be placed into the housing 5 if the disposable core module consisting of the first filter part 1 and the power part 2 is installed in the correct position and direction. Otherwise, the protrusion 501 will prevent the core module from entering the housing 5, thus forming an anti-misfit mounting mechanism.

[0063] As shown in Figures 11 and 12, the power unit limiting sleeve 205 is a component connected to the motor shaft sleeve 301, forming a coarse positioning mechanism for connecting the core module and the motor shaft 302, thereby providing the preconditions for the fine positioning connection between the transmission shaft 2017 and the motor shaft 302.

[0064] As shown in Figure 12 (and also Figures 6 and 9), the first filter part 1 has a slot 104 on the side opposite to the housing 5; the housing 5 has a latch 601 on the inner side of the side opposite to the first filter part 1 at a position corresponding to the slot 104; the latch 601 and the slot 104 are engaged to limit the first filter part 1 so that the first filter part 1 cannot be detached from the housing 5 after it is installed in the housing 5.

[0065] That is, the locking part 6 (locking module) can confine the core module, which is a single unit combining the first filter part 1 and the power part 2, within the housing 5 to prevent the core module from moving out. In addition, after the locking part 6 (locking module) is unlocked, the disposable core module can be removed for replacement.

[0066] As shown in Figure 12 (and also Figures 2 and 6), the housing 5 includes a positioning detection unit 4, which is used to detect whether the first filter unit 1 is installed in the housing 5. The positioning detection unit 4 includes a contact 401, which is located at the bottom of the housing 5 and is pressed by the first filter unit 1 when the first filter unit 1 is installed in the housing 5, and sends a signal to indicate that the first filter unit 1 is installed in the housing 5.

[0067] Specifically, the positioning detection unit 4 (positioning signal module) is a component that detects whether the first filter unit 1 is installed in place. The contact 401 is a columnar structure (but it can also be other structural forms). When the first filter unit 1 is installed to the bottom, the contact 401 is pressed and compressed, and the column head will move to a new position, thereby connecting the circuit and transmitting a signal to the host (not shown) to indicate that the first filter unit 1 is installed in place.

[0068] The housing 5 positions and connects the connecting shaft (drive shaft 2017) of the power unit 2 (power module) to the connecting shaft (motor shaft 302) of the motor via, for example, a quick-connect interface. The motor 3 drives the power, which is transmitted through the drive shaft 2017 to the umbrella-shaped module (umbrella support frame 2012A) described later, thereby causing the diaphragm structure 2012 described later to move up and down, thus realizing the function of outputting power.

[0069] As shown in Figure 13 (and also Figure 6), the power head assembly 201 has a diaphragm structure 2012, an umbrella-shaped support frame 2012A, and an inclined shaft structure 2012B inside; the drive shaft 2017 of the power head assembly 201 is connected to the inclined shaft structure 2012B; the drive shaft 2017 of the power head assembly 201 is mounted on a shaft mounting seat 2015 provided outside the power head assembly 201 via a bearing 2016; the power head assembly 201 and the shaft mounting seat 2015 are sealed by sequentially providing an end face sealing gasket 2019, an end face sealing ring 2018, and a shaft rotation seal 2019A in a direction away from the power head assembly 201.

[0070] In addition, as shown in Figure 13, a shaft sealing assembly structure is provided at the circumference of the drive shaft 2017 in the power head assembly 201 (see Figure 13) to prevent gas leakage from this location and to ensure the pressure value of the gas inside the power head assembly 201.

[0071] Furthermore, as shown in Figure 13, the power head assembly 201 is equipped with a diaphragm structure 2012, an umbrella-shaped support frame 2012A, and an inclined shaft structure 2012B, which work together to form the movement of the diaphragm structure 2012, thereby generating the power shaft for air extraction.

[0072] As shown in Figures 14 and 15 (and also Figures 6 and 12), the power unit 2 includes a power head assembly 201. The drive shaft 2017 of the power head assembly 201 is provided with a connection interface and is connected to the motor shaft 302 of the motor 3 located outside the housing 5.

[0073] As shown in Figures 14 and 15, the head structure of the drive shaft 2017 of the power head assembly 201 is a cross structure, which is connected to the cross structure of the motor shaft 302 of the motor 3.

[0074] Here, as shown in Figures 14 and 15, the head structure of the drive shaft 2017 in the power head assembly is set as a cross structure, which cooperates with the cross-shaped structure of the motor shaft 302 to form a quick-connect structure. This structure enables the drive shaft 2017 and the motor shaft 302 to be quickly connected when the core module (composed of the first filter part 1 and the power part 2) is fitted with the housing 5. In addition, the cross structure is provided with chamfers, which can prevent the two parts from being limited by surface to surface during docking. Instead, the chamfers allow the motor shaft 302 or the drive shaft 2017 to rotate slightly, and then the cross structures are connected to each other, thereby achieving efficient power transmission. Here, the aforementioned coarse positioning refers to the positioning of the motor shaft sleeve 301 and the power part limiting sleeve 205, while the fine positioning refers to the positioning of the drive shaft 2017 and the motor shaft 302. Positioning ensures the concentricity of the shafts, ensures positioning accuracy, and achieves smooth shaft movement and efficient power transmission. Of course, the above quick-connect structure is not limited to the cross structure; a straight structure can also be used.

[0075] In summary, the drive shaft 2017 is connected to the slanted shaft structure 2012B (i.e., the slanted shaft module) to transmit torque power. The drive shaft 2017 is also connected to the motor shaft 302 via a quick-connect fitting, thus realizing power transmission. Since the drive shaft 2017 needs to be sealed, in Figure 13, from left to right, an end face sealing gasket 2019, an end face sealing ring 2018, and a shaft rotation seal 2019A are sequentially arranged to prevent air leakage inside the power head assembly 201. Simultaneously, a bearing 2016 is provided on the drive shaft 2017 to support it, thereby reducing friction, making rotation smoother, and ensuring the stable operation of the power head assembly 201.

[0076] Furthermore, as shown in Figure 1, this application provides a laparoscope 1001, which includes the aforementioned intracavitary gas self-circulation filtration device.

[0077] As shown in Figure 1, the laparoscope 1001 also includes a first puncture device 7 and a second puncture device 701. The first puncture device 7 and the second puncture device 701 have the same structure but different specifications and serve different functions. The first puncture device 7 is the puncture cannula of the surgical instrument 8, and its main function is to aspirate and expel the smoke-containing gas generated during the operation of the active instrument (such as the surgical instrument 8) from the abdominal cavity 1003. The position of the suction port of the first puncture device 7 can be adjusted and can be closer to or further away from the forceps tip of the active surgical instrument 8. The second puncture device 701 serves as the puncture cannula for the endoscope 9, and functions as follows: 1. It returns filtered gas to the abdominal cavity 1003; 2. By positioning the air outlet of the second puncture device 701 close to the lens end of the endoscope 9 and continuously blowing air, a clear surgical field area 1003A is formed as shown in Figure 1 (i.e., the smoke generated by the active surgical instrument 8 is dispersed, forming a region with a continuous high-speed airflow to maintain a clear field of view). This clear surgical field area 1003A is also called the air curtain barrier area. Due to the protection of the air curtain barrier, smoke, oil mist, etc., are isolated, thereby achieving a clear surgical field area. Simultaneously, the first puncture device 7 and the second puncture device 701 cooperate with the aforementioned intracavitary gas self-circulation filtration device to form a gas self-circulation system within the abdominal cavity. Furthermore, not limited to the above, conversely, the first puncture device 7 can also be used as the puncture cannula for the endoscope 9, and the second puncture device 701 can be used as the puncture cannula for the surgical instrument 8.

[0078] As shown in Figures 16 and 17, the structure of the first puncture device 7 includes: an airflow channel 7001; a support partition 7002; a first sealing part 7003; a second sealing part 7004; an airflow inlet / outlet 7005; and an instrument inlet 7006. As shown in Figure 16, at the distal end of the first puncture device 7, the support partition 7002 acts as a limiting element, allowing the surgical instrument 8 (or endoscope 9) to be positioned at the center of the puncture cannula, thus forming a uniform airflow channel. Air exhaust and air delivery operations can be performed through the airflow channel. The first puncture device 7 can be available in various sizes to accommodate different surgical instruments 8 and tools, and the length of the puncture cannula can also vary. The structure of the second puncture device 701 can be the same as that of the first puncture device 7.

[0079] During laparoscopic filtration, the suction port of the puncture cannula connected to the active surgical instrument 8 can also be brought close to the forceps of the surgical instrument 8. When the electrodes of the surgical instrument 8 generate smoke, the smoke can be quickly and closely suctioned out to ensure a clear surgical field.

[0080] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application 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, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0081] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art will understand the specific meaning of the above terms in this application based on the specific circumstances.

[0082] For those skilled in the art, any modifications or alterations made based on the above embodiments of this application, without departing from the spirit of this application, should be included within the scope of protection of this application.

Claims

1. A self-circulating gas filtration device for laparoscopic surgery, characterized in that, include: The first filter section (1) has a first filter section air inlet (102) and a first filter section air outlet (103), and the first filter section air inlet (102) is connected to the human abdominal cavity (1003). The power unit (2) is connected to the first filter unit (1) and has a power unit air inlet (203) and a power unit air outlet (202). The power unit air inlet (203) is connected to the first filter unit (1) through the first filter unit air outlet (103), and the power unit air outlet (202) is connected to the human abdominal cavity (1003). The housing (5) has an opening and an internal space communicating with the outside and houses the first filter (1) and the power unit (2) in the internal space; as well as At least one second filter section (1005) is connected to at least one of the first filter section inlet (102) and the power section outlet (202).

2. The intracavity gas self-circulation filtration device according to claim 1, characterized in that: The first filter section (1) has a connecting groove (106) on the side opposite to the power section (2); The power unit (2) has at least one latch (204) on the side opposite to the first filter unit (1); The first filter unit (1) and the power unit (2) are connected by engaging the connecting groove (106) and the buckle (204).

3. The intracavity gas self-circulation filtration device according to claim 1, characterized in that: The first filter section (1) has a slot (104) on the side opposite to the housing (5); The housing (5) has a latch (601) at a position corresponding to the slot (104) on the inner side of the side opposite to the first filter part (1); The first filter section (1) can be limited by the engagement of the latch (601) and the slot (104) so ​​that the first filter section (1) cannot be detached from the housing (5).

4. The intracavity gas self-circulation filtration device according to claim 1, characterized in that: The housing (5) includes a positioning detection unit (4), which is used to detect whether the first filter unit (1) is installed in the housing (5); The positioning detection unit (4) includes a contact (401) disposed at the bottom of the housing (5) and pressed by the first filter unit (1) when the first filter unit (1) is installed in the housing (5) and sends a signal to indicate that the first filter unit (1) is installed in the housing (5).

5. The intracavity gas self-circulation filtration device according to claim 1, characterized in that: The power unit (2) includes a power head assembly (201), the drive shaft (2017) of the power head assembly (201) is provided with a connection interface and is connected to the motor shaft (302) of the motor (3) located outside the housing (5).

6. The intracavity gas self-circulation filtration device according to claim 5, characterized in that: The head structure of the drive shaft (2017) of the power head assembly (201) is a cross structure, and it is connected to the cross structure of the motor shaft (302) of the motor (3).

7. The intracavity gas self-circulation filtration device according to claim 5, characterized in that: The power head assembly (201) is internally provided with a diaphragm structure (2012), an umbrella-shaped support frame (2012A), and an inclined shaft structure (2012B); The drive shaft (2017) of the power head assembly (201) is connected to the inclined shaft structure (2012B); The drive shaft (2017) of the power head assembly (201) is mounted on a shaft mounting base (2015) provided outside the power head assembly (201) via a bearing (2016); The power head assembly (201) and the shaft mounting base (2015) are sealed by sequentially providing an end face sealing gasket (2019), an end face sealing ring (2018), and a shaft rotation seal (2019A) in a direction away from the power head assembly (201).

8. The intracavity gas self-circulation filtration device according to claim 1, characterized in that: A heat insulation structure (206) is provided around the pipeline at the air outlet (202) of the power unit (2), and heat insulation material is provided in the heat insulation structure (206).

9. The intracavity gas self-circulation filtration device according to claim 1, characterized in that: The intracavity gas self-circulation filtration device further includes a gas pressure detection device, which includes: A first gas flow sensor is disposed near the air inlet (102) of the first filter section and detects the flow rate of the incoming gas flowing through the air inlet (102) of the first filter section in real time within a predetermined time period. The second gas flow sensor is located near the outlet (202) of the power unit and detects the flow rate of the gas flowing through the outlet (202) of the power unit in real time every unit predetermined time. A control unit is disposed in the housing (5) and controls the speed of air extraction from the abdominal cavity (1003) based on the ratio of the volume of gas extracted calculated from the intake gas flow rate detected by the first gas flow sensor to the volume of gas supplied calculated from the exhaust gas flow rate detected by the second gas flow sensor.

10. A laparoscopy, characterized in that: include: The intracavitary gas self-circulation filtration device according to any one of claims 1-9; The first puncture device (7) is connected to the cavity gas self-circulation filter device and is inserted into the human abdominal cavity (1003); as well as The second puncture device (701) is connected to the intracavitary gas self-circulation filter device and is inserted into the human abdominal cavity (1003); One of the first puncture device (7) and the second puncture device (701) draws air from the abdominal cavity (1003) of the human body, and the other of the first puncture device (7) and the second puncture device (701) blows air into the abdominal cavity (1003) of the human body and forms a clear surgical field area (1003A) near the location of the air outlet as an air curtain barrier area.

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