Gas removal system for laparoscopic surgery

Abstract

To provide a gas removal system for laparoscopic surgery capable of removing gas in an abdominal cavity of a patient, completely without discharging gas into an operation room.SOLUTION: A gas removal system for laparoscopic surgery for removing gas in an abdominal cavity in the laparoscopic surgery, includes a gas suction path 10 whose one end 10a is arranged in an abdominal cavity C, a gas storage part 11 connected to the other end of the gas suction path 10, and a pump part 12 provided in the middle of the gas suction path 10. After sucking gas in the abdominal cavity C by suction operation by the pump part 12 through the gas suction path 10, gas is stored in the gas storage part 11.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a gas removal system for laparoscopic surgery, which is used in laparoscopic surgery and which removes gas from within the abdominal cavity. [Background technology]

[0002] In recent years, laparoscopic surgery, which is a procedure that does not require abdominal incision and is intended to reduce the burden on patients during surgery, has become known. In this laparoscopic surgery, a first trocar for inserting an endoscope into the abdominal cavity to observe the abdominal cavity and a second trocar for inserting a treatment instrument into the abdominal cavity are inserted into the patient's abdomen, and a specific surgery is performed by operating the treatment instrument inserted into the second trocar while observing the abdominal cavity with the endoscope inserted into the first trocar.

[0003] In such laparoscopic surgery, an insufflation device is used to ensure the field of view of the endoscope and to secure an area in the abdominal cavity for operating treatment instruments. This insufflation device supplies gas (e.g., carbon dioxide) into the abdominal cavity of the patient, increasing the pressure within the abdominal cavity to inflate the abdomen and secure a specified area within the abdominal cavity.

[0004] During laparoscopic surgery, surgical smoke (smoke or mist (moisture)) is generated when an electric scalpel or ultrasonic treatment instrument is used, and the surgical smoke may obstruct the endoscopic surgical field or cause unexpected bleeding or the eruption of bodily fluids, so these are aspirated and discharged from the abdominal cavity together with the gas (see Patent Document 1). In addition, after removing moisture and impurities from the aspirated gas, the gas is recirculated to an insufflation device and supplied again to the abdominal cavity (see Patent Document 2). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Special Publication No. 2017-502703 [Patent Document 2] JP 2020-96887 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, in conventional devices, the gas sucked from the abdominal cavity was discharged directly into the operating room, and even gas recirculation devices discharged excess gas into the operating room. Therefore, if a patient is infected with an infectious disease such as COVID-19, gas containing infectious viruses or bacteria will spread in the operating room, and doctors and nurses may be at risk of contracting the infection by inhaling the gas.

[0007] The present invention has been made in consideration of the above-mentioned problems, and aims to provide a gas removal system for laparoscopic surgery that can completely remove gas from a patient's abdominal cavity without discharging it into the operating room, thereby preventing or reducing the risk of infection for doctors and nurses. [Means for solving the problem]

[0008] In order to achieve the above-mentioned object, the present invention provides a gas removal system for laparoscopic surgery that removes gas from within the abdominal cavity during laparoscopic surgery, and is characterized in that it comprises a gas suction path having one end located within the abdominal cavity and a gas storage section connected to the other end of the gas suction path, and that gas from within the abdominal cavity is suctioned through the gas suction path and then stored in the gas storage section.

[0009] According to this, the gas sucked from the abdominal cavity is stored in the gas storage section, so that the gas in the patient's abdominal cavity can be completely removed without being discharged into the operating room.

[0010] It is also preferable that the gas suction path is provided with a pump section for sucking gas from within the abdominal cavity, and that the gas from within the abdominal cavity is sucked through the gas suction path by the suction action of the pump section. In this way, the gas from within the abdominal cavity can be easily and reliably sucked by the suction action of the pump section.

[0011] It is also preferable that the inside of the gas storage section is in a state of lower pressure than the pressure in the abdominal cavity or in a vacuum state, and that the gas in the abdominal cavity is sucked through the gas suction path by the low pressure or vacuum state of the gas storage section. In this way, the gas in the abdominal cavity can be sucked easily and reliably by the low pressure or vacuum state of the gas storage section.

[0012] Moreover, it is preferable that the gas storage section includes at least one type of adsorbent selected from the group consisting of silica gel, alumina, activated carbon, and zeolite, and a gas storage container in which the adsorbent is accommodated, and that the gas storage container is detachably attached to the gas suction passage. This allows the moisture contained in the gas to be reliably adsorbed by at least one type of adsorbent selected from the group consisting of silica gel, alumina, activated carbon, and zeolite. Moreover, since the gas storage container is detachably attached to the gas suction passage, when the adsorbent has adsorbed a predetermined amount of moisture, the gas storage container can be removed from the gas suction passage and discarded or subjected to a predetermined process without exposing the gas to the outside air.

[0013] It is also preferable that the inside of the gas storage section is in a vacuum state and the temperature is set to 50 to 70 degrees C. This makes it possible to maximize the amount of gas adsorption while improving ease of handling of the container and energy conservation.

[0014] In addition, the gas suction passage is preferably provided with a gas-liquid separation section for separating the sucked gas from the liquid, whereby the gas sucked from the abdominal cavity is separated from the liquid, making it easier to carry out subsequent processes related to the adsorption of moisture and impurities in the adsorption section and the adsorption of moisture and gas in the gas storage section.

[0015] In addition, the gas suction passage is preferably provided with an adsorption section for adsorbing moisture and / or impurities contained in the gas sucked from the abdominal cavity. This allows the moisture and / or impurities contained in the gas sucked from the abdominal cavity to be adsorbed before storage, making it possible to easily perform adsorption of moisture and gas in the gas storage section and processing related to reuse when the gas is recirculated.

[0016] In addition, it is preferable that the adsorption unit includes at least one type of adsorbent selected from the group consisting of silica gel, alumina, activated carbon, and zeolite, and an adsorption unit container in which the adsorbent is stored in a sealed state, and that the adsorption unit container is detachably provided on the gas suction path. This allows the moisture contained in the gas to be reliably adsorbed by at least one type of adsorbent selected from the group consisting of alumina, activated carbon, and zeolite, and makes it easy to perform subsequent processing in the gas storage unit. Moreover, since the adsorption unit container is detachably provided on the gas suction path, when the adsorbent has adsorbed a predetermined amount of moisture, the adsorbent container can be removed from the gas suction path, and thus the adsorbent can be discarded or subjected to a predetermined processing without being exposed to the outside air.

[0017] In addition, the adsorption section preferably has multiple layers of at least two types of adsorbents selected from silica gel, alumina, activated carbon, and zeolite, from the suction side to the exhaust side, which allows the moisture contained in the gas to be adsorbed simply and reliably.

[0018] The adsorption section is preferably arranged so that the adsorbent in each layer adsorbs less moisture from the gas than the adsorbent in the previous layer, so that the adsorption section can efficiently adsorb the moisture contained in the gas in stages by adsorbing a large amount of moisture from the initial gas with a high relative humidity from the gas suction side to the gas exhaust side, and then sequentially adsorbing small amounts of moisture remaining from the gas whose relative humidity has decreased.

[0019] The adsorption unit is preferably provided with silica gel, alumina or activated carbon as the adsorbent for the first layer on the suction side, and zeolite as the adsorbent for the second layer following the first layer. The adsorption unit is preferably provided with silica gel as the adsorbent for the first layer on the suction side, alumina or activated carbon as the adsorbent for the second layer following the first layer, and zeolite as the adsorbent for the third layer following the second layer. The adsorption unit is preferably provided with silica gel as the adsorbent for the first layer on the suction side, alumina as the adsorbent for the second layer following the first layer, activated carbon as the adsorbent for the third layer following the second layer, and zeolite as the adsorbent for the fourth layer following the third layer. These combinations allow the moisture contained in the gas to be adsorbed efficiently and reliably in stages.

[0020] In addition, it is preferable that the inside of the adsorption container is divided into a plurality of compartments through a communication hole, each compartment contains an adsorbent made of the same or different material, the suction side end of the gas suction path is detachably connected to the compartment on the gas suction side, and the discharge side end of the gas suction path is detachably connected to the compartment on the gas discharge side. According to this, the gas sucked from the abdominal cavity flows from the suction side end of the gas suction path into the compartment on the suction side, where a predetermined amount of moisture and impurities are removed, and then flows from the communication hole into the adjacent compartment, where a predetermined amount of moisture and impurities are removed in the compartment, and this is repeated for the number of compartments, and then the gas is discharged from the discharge side end of the gas suction path, so that moisture and impurities contained in the gas can be easily and reliably removed. In addition, by removing the suction side end of the gas suction path from the compartment on the suction side and removing the discharge side end of the gas suction path from the compartment on the discharge side, the adsorbent can be disposed of or subjected to a predetermined process without being exposed to the outside air.

[0021] It is also preferable that the adsorption unit container has a communication hole in the upper part of the compartment, the suction side end of the gas suction path is detachably connected to the lower part of the compartment on the gas suction side, and the discharge side end of the gas suction path is detachably connected to the lower part of the compartment on the gas discharge side. This allows the adsorbent to be filled from the upper part of the bag body and sealed, making it possible to easily manufacture the adsorption unit.

[0022] It is also preferable that the adsorption unit container is provided with a filter in a lower region of the compartment where the suction end and discharge end of the gas suction passage are connected, and the adsorbent is disposed above the filter, thereby preventing the adsorbent contained in the compartment from clogging the suction end and discharge end of the gas suction passage.

[0023] It is also preferable to provide a gas supply passage having one end disposed in the abdominal cavity and the other end connected to a gas cylinder, for supplying gas by an insufflation device, a gas circulation passage having one end connected to the gas suction passage and the other end connected to the gas supply passage, and an on-off valve provided in the gas suction passage on the gas storage section side of the connection between the gas suction passage and the gas circulation passage, such that when the on-off valve is opened, gas in the abdominal cavity is delivered to the gas storage section through the gas suction passage, whereas when the on-off valve is closed, gas in the abdominal cavity is delivered to the gas supply passage through the gas suction passage and the gas circulation passage. According to this, by switching the gas delivery path by opening and closing the on-off valve, gas aspirated from the abdominal cavity can be stored in the gas storage section without being discharged into the operating room, or can be reused after being adjusted to a predetermined temperature, pressure, and humidity in the insufflation device. Effect of the Invention

[0024] According to the present invention, gas in the patient's abdominal cavity can be completely removed without being discharged into the operating room, thereby making it possible to prevent or reduce the risk of infection for doctors and nurses. [Brief description of the drawings]

[0025] [Figure 1] 1 is a schematic diagram showing an overall configuration of a gas removal system for laparoscopic surgery according to a first embodiment of the present invention. [Diagram 2] FIG. 2 is a cross-sectional view showing an example of the configuration of a gas storage container. [Diagram 3] FIG. 11 is a schematic diagram showing the overall configuration of a gas removal system for laparoscopic surgery according to a second embodiment of the present invention. [Figure 4] 1 is a table showing the correspondence relationship between the adsorbent in the adsorption section and the relative humidity. [Diagram 5] 1 is a table showing combinations of adsorbents in an adsorption section. [Figure 6] FIG. 2 is a front view showing a first configuration example of the container (bag) for the suction part. [Figure 7] FIG. 11 is a front view showing a second configuration example of the container (bag) for the suction part. [Figure 8] FIG. 11 is a schematic diagram showing the overall configuration of a gas removal system for laparoscopic surgery according to a third embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026] <First embodiment> Next, a first embodiment of a gas removal system for laparoscopic surgery according to the present invention (hereinafter, referred to as the present system) will be described with reference to FIGS. 1 and 2. FIG.

[0027] In laparoscopic surgery using this system, a first trocar for inserting an endoscope into the abdominal cavity C to observe the inside of the abdominal cavity C and a second trocar for inserting a treatment instrument into the abdominal cavity C are inserted into the patient's abdomen, and a prescribed surgery is performed by operating the treatment instrument inserted into the second trocar while observing the inside of the abdominal cavity C with the endoscope inserted into the first trocar. Since each of these instruments other than this system is publicly known, their description will be omitted.

[0028] As shown in FIG. 1, this system comprises a gas suction path 10, one end 10a of which is disposed within the abdominal cavity C via a trocar (not shown), a gas storage section 11 connected to the other end of the gas suction path 10, and a pump section 12 provided midway through the gas suction path 10. The suction action of the pump section 12 sucks gas within the abdominal cavity C through the gas suction path 10 and stores it in the gas storage section 11.

[0029] As shown in FIG. 2, the gas storage section 11 includes one or more types of adsorbent 111 and a gas storage section container 112 in which the adsorbent 111 is contained, and the gas storage section container 112 is detachably provided on the gas suction path 10.

[0030] The gas storage container 112 is a rigid container made of metal or synthetic resin and is constructed of a material that does not allow gases to pass through to the outside, and the end of the gas suction path 10 is detachably connected to the mouth 112a formed at the top via a connector 113.

[0031] Examples of the adsorbent 111 include granular materials such as silica gel, alumina, activated carbon, and zeolite that mainly adsorb moisture contained in gas. In particular, when zeolite is used as the adsorbent 111, it adsorbs no or only a very small amount of gas (carbon dioxide gas), so that the gas and moisture can be stored in the gas storage container 112 in a separated state.

[0032] Thus, when the gas in the abdominal cavity C is sucked together with surgical smoke (moisture and smoke) and liquids such as blood and body fluids by the suction operation of the pump unit 12, the gas and the like are sucked into the pump unit 12 through the gas suction path 10 on the suction side, and then sent from the pump unit 12 to the gas storage unit 11 through the gas suction path 10 on the discharge side, and are stored in the gas storage unit 11. In addition, moisture and impurities contained in the gas stored in the gas storage unit 11 are appropriately adsorbed by the adsorbent 111 of the gas storage unit 11 and separated from the gas. After that, when a predetermined amount of gas is stored in the gas storage unit 11, if the gas storage unit container 112 is removed from the gas suction path 10 via the connector 113, the gas, moisture and impurities can be completely removed without being discharged into the operating room. In addition, the connector 113 is automatically or manually plugged when the gas storage unit container 112 is removed from the gas suction path 10.

[0033] In this embodiment, the gas in the abdominal cavity C is sucked through the gas suction path 10 by the suction action of the pump unit 12, but the gas may be sucked through the gas suction path 10 by other methods. For example, it is possible to set the inside of the gas storage container 112 to a lower pressure state than the pressure in the abdominal cavity C or to a vacuum state, and suck the gas in the abdominal cavity C through the gas suction path 10 by the low pressure or vacuum state of the gas storage container 112. In this case, the gas storage container 112 is preferably set to a low pressure state with an internal pressure of 13.3 Kpa (100 torr) or less, preferably a vacuum state of 133 Pa (1 torr) or less.

[0034] In addition, the gas storage unit 11 may have an adsorbent that adsorbs gas housed in the gas storage unit container 112. In this way, since the gas is adsorbed by the adsorbent, a large amount of gas can be stored inside the gas storage unit container 112.

[0035] In addition, the inside of the gas storage container 112 is preferably in a vacuum state and set at a temperature of 50 to 70 degrees, which is about 60 degrees, and more preferably 55 to 65 degrees. To be more specific, when the temperature inside the gas storage container 112 becomes high, the amount of gas adsorbed by the adsorbent (for example, Oxybu-7) increases, but when the inside of the gas storage container 112 is in a vacuum state (133 Pa or less), it has been found that the amount of gas adsorbed by the adsorbent hardly changes even if the inside temperature exceeds about 60 degrees. Therefore, when the inside is in a vacuum state and the temperature is set at 50 to 70 degrees, which is about 60 degrees, and more preferably 55 to 65 degrees, it is possible to maximize the amount of gas adsorbed while ensuring ease of handling of the container and energy saving.

[0036] <Second embodiment> Next, a second embodiment of the present system will be described with reference to FIGS.

[0037] In this embodiment, as shown in FIG. 3, a gas-liquid separation section 13 and an adsorption section 14 are provided in the gas suction passage 10.

[0038] The gas-liquid separator 13 is provided between one end 10a of the gas suction passage 10 and the pump section 12, and separates the gas sucked through the gas suction passage 10 from the liquid (for example, water, blood, body fluids, etc.).

[0039] The adsorption section 14 is provided between the gas-liquid separation section 13 and the pump section 12, and removes moisture and impurities contained in the gas sucked from the abdominal cavity C, and includes one or more types of adsorbents 141 and an adsorption section container 142 that contains the adsorbents 141. Below, configuration examples of the adsorbents 141 and the adsorption section container 142 will be described.

[0040] (Example of the configuration of the adsorbent 141) The adsorbent 141 is made of at least one type of adsorbent selected from the group consisting of silica gel, alumina, activated carbon, and zeolite. Preferably, two or more types of adsorbent 141 are provided in multiple layers from the suction side to the discharge side.

[0041] In addition, as shown in FIG. 4, since the amount of moisture, organic gas (surgical smoke), and carbon dioxide (CO2) adsorbed varies depending on the type of adsorbent 141, the adsorbents 141 may be arranged such that each layer of adsorbent 141 has a smaller degree of adsorption of moisture from the gas (relative humidity) than the adsorbent 141 in the previous layer.

[0042] For example, an adsorbent (e.g., activated carbon, activated alumina, silica gel) that adsorbs moisture from gas with a relative humidity of 40% RH or more is provided as the first layer of adsorbent 141 on the suction side, and an adsorbent with a lower relative humidity than the first layer is provided as the second layer of adsorbent 141 following the first layer.

[0043] Specifically, the adsorbent 141 may be configured as shown in FIG. 5. For example, when the adsorbent 141 is configured as a combination of two layers, it is preferable that silica gel, activated alumina or activated carbon is provided as the adsorbent 141 of the first layer on the suction side, and zeolite is provided as the adsorbent 141 of the second layer following the first layer. When the adsorbent 141 is configured as a combination of three layers, it is preferable that silica gel is provided as the adsorbent 141 of the first layer on the suction side, activated alumina or activated carbon is provided as the adsorbent 141 of the second layer following the first layer, and zeolite is provided as the adsorbent 141 of the third layer following the second layer. When the adsorbent 141 is configured as a combination of four layers, it is preferable that silica gel is provided as the adsorbent 141 of the first layer on the suction side, activated alumina is provided as the adsorbent 141 of the second layer following the first layer, activated carbon is provided as the adsorbent 141 of the third layer following the second layer, and zeolite is provided as the adsorbent 141 of the fourth layer following the third layer. Note that, as shown in FIG. 5, other combinations of the adsorbents 141 may be used.

[0044] According to this, in the adsorption section 14, a large amount of moisture is adsorbed from the initial gas with a high relative humidity from the gas suction side to the gas discharge side, and then a small amount of moisture remaining from the gas with a lower relative humidity is sequentially adsorbed, thereby making it possible to efficiently remove the moisture contained in the gas in a stepwise manner.

[0045] (Example of configuration of adsorption unit container 142) The adsorption unit container 142 is a rigid or bag-shaped container made of metal or synthetic resin, and is made of a material that does not allow gases and the like to pass to the outside.

[0046] In addition, the interior of the adsorption section container 142 may be divided into a number of compartments via communicating holes, with each compartment housing an adsorbent of the same or different material, and the suction side end of the gas suction path 10 may be detachably connected to the compartment on the gas suction side, and the discharge side end of the gas suction path 10 may be detachably connected to the compartment on the gas discharge side.

[0047] For example, as shown in FIG. 6, the adsorption unit container 142 may be made of a synthetic resin bag that hermetically covers the adsorbent, and the bag may be detachably attached to the gas suction path 10.

[0048] The adsorption unit container 142 is internally divided into a first compartment 142a and a second compartment 142b on the left and right sides, and a communication hole 142c is provided at the bottom to communicate the first compartment 142a and the second compartment 142b. The first compartment 142a of the adsorption unit container 142 is internally provided with a first layer of adsorbent 141 and is provided with a connector 143 at the top, and is detachably connected to the suction side end of the gas suction path 10 via the connector 143. The second compartment 142b of the adsorption unit container 142 is internally provided with a second layer of adsorbent 141 and is provided with a connector 143 at the top, and is detachably connected to the discharge side end of the gas suction path 10 via the connector 143.

[0049] According to this, gas sucked from within the abdominal cavity C flows into the first compartment 142a from the suction side end of the gas suction path 10, where certain moisture and impurities are removed by the adsorbent 141, and then flows into the second compartment 142b from the communicating hole 142c, where certain moisture and impurities are removed by the adsorbent 141, and the gas is discharged from the discharge side end of the gas suction path 10, so that the moisture and impurities contained in the gas can be adsorbed easily and reliably.

[0050] When the adsorbent 141 in the adsorption part container 142 has adsorbed a predetermined amount of moisture and impurities, the adsorption part container 142 in which the adsorbent 141 is contained in a sealed state can be easily and reliably removed by removing the suction side end of the gas suction path 10 from the first compartment 142a of the adsorption part container 142 via the connector 143 and removing the discharge side end of the gas suction path 10 from the second compartment 142b of the adsorption part container 142 via the connector 143, and the adsorbent 141 can be discarded or subjected to a predetermined process without being exposed to the outside air in the operating room. The connector 143 is automatically or manually plugged when the adsorption part container 142 is removed from the gas suction path 10.

[0051] In this embodiment, the connector 143 is provided at the top of the adsorption unit container 142, but as shown in Fig. 7, a communication hole 142c may be provided at the top of the adsorption unit container 142, and the connector 143 may be provided at the bottom of the adsorption unit container 142. This allows the adsorbent 141 to be filled and sealed from the top of the adsorption unit container 142, making it possible to easily manufacture the adsorption unit 14. In this case, in order to prevent the adsorbent 141 from clogging the connector 143, a filter 144 (wire mesh, punching plate, nonwoven fabric, etc.) may be provided in the lower region of the space of the adsorption unit container 142, and the adsorbent 141 may be placed on the filter 144.

[0052] Furthermore, the adsorption unit container 142 may be made transparent or semi-transparent, or may have an inspection window, so that it is possible to determine whether the adsorbent 141 has adsorbed a predetermined amount of moisture or impurities by the state (e.g., color) of the adsorbent 141. For example, when silica gel is used as the adsorbent 141, the silica gel changes color from blue to orange as it adsorbs moisture, so that it is possible to determine by color whether the adsorbent 141 has adsorbed a predetermined amount of moisture.

[0053] Further, in the adsorption section container 142, the same adsorbent 141 is provided in the same space, but different adsorbents 141 may be provided in layers in the same space.

[0054] <Third embodiment> Next, a third embodiment of the present system will be described with reference to FIG.

[0055] In this embodiment, as shown in FIG. 8, a gas supply path 20 is provided to supply new gas from a gas cylinder 21 into the abdominal cavity C, and a gas circulation path 30 is provided to circulate gas aspirated from the abdominal cavity C, and the gas supply path 20 is provided with a gas cylinder 21 and an insufflation device 22.

[0056] One end 20a of the gas supply path 20 is placed in the abdominal cavity C via a trocar (not shown), and the other end is connected to a gas cylinder 21, and gas from the gas cylinder 21 is supplied into the abdominal cavity C through the gas supply path 20 by an insufflation device 22.

[0057] The gas circulation path 30 has one end connected to a gas suction path 10 and the other end connected to a gas supply path 20, and sends gas sucked from the abdominal cavity C through the gas suction path 10 to the gas supply path 20, and the gas is supplied into the abdominal cavity C through the gas supply path 20 by an insufflation device 22.

[0058] The gas suction path 10 is provided with an on-off valve 15 on the gas storage section 11 side of the connection part A of the gas circulation path 30. Therefore, when the on-off valve 15 is opened by a control part (not shown), the gas discharged from the pump part 12 is sent directly to the gas storage section 11 through the gas suction path 10, whereas when the on-off valve 15 is closed, the gas discharged from the pump part 12 is sent to the gas supply path 20 through the gas circulation path 30.

[0059] The gas suction path 10 may be provided with a gas purity measuring unit 16 between the connection part of the gas circulation path 30 and the pump part 12. According to this, when the purity of the gas measured by the gas purity measuring unit 16 does not satisfy a predetermined value, the gas is sent to the gas storage part 11 by opening the on-off valve 15 by a control part (not shown), whereas when the purity of the gas measured by the gas purity measuring unit 16 satisfies the predetermined value, the gas is sent to the gas supply path 20 through the gas circulation path 30 by closing the on-off valve 15 by a control part (not shown).

[0060] The pneumoperitoneum device 22 is a device for supplying gas from the gas cylinder 21 and / or gas aspirated from the abdominal cavity C into the abdominal cavity C through the gas supply path 20, and supplies the gas after appropriately adjusting the temperature, pressure, humidity, etc., of the gas into the abdominal cavity C. When supplying gas, the gas from the gas cylinder 21 and the aspirated gas are appropriately switched or mixed depending on the gas temperature, pressure, humidity, etc., before being supplied into the abdominal cavity C.

[0061] As described above, according to the system of the third embodiment, by switching the gas delivery path by opening and closing the on-off valve 15, the gas aspirated from the abdominal cavity C can be stored in the gas storage section 11 without being discharged into the operating room, or it can be reused after being adjusted to a predetermined temperature, pressure, and humidity in the insufflation device 22.

[0062] Although the embodiment of the present invention has been described above with reference to the drawings, the present invention is not limited to the illustrated embodiment. Various modifications and variations can be made to the illustrated embodiment within the same scope as the present invention or within an equivalent scope. [Explanation of symbols]

[0063] 10...Gas suction passage 11...Gas storage section 111...Adsorbent 112...Gas storage container 112a...Mouth 113…Connector 12…Pump section 13...Gas-liquid separation section 14...Adsorption part 141...Adsorbent 142...Container for adsorption part 142a…First compartment 142b…Second compartment 142c…Communication hole 143…Connector 144…Filter 15...Shut-off valve 16...Gas purity measurement section 20...Gas supply line 21...Gas cylinder 22...Insufflation device 30…Gas circulation path C…Abdominal cavity

Claims

1. A gas removal system for laparoscopic surgery for removing gas from within an abdominal cavity during laparoscopic surgery, comprising: a gas suction passage having one end disposed within the abdominal cavity; a gas storage portion connected to the other end of the gas suction path, The gas in the abdominal cavity is sucked through the gas suction passage and then stored in the gas storage section; the gas suction path is provided with an adsorption section that adsorbs moisture and / or impurities contained in gas suctioned from the abdominal cavity; the adsorption unit includes at least one type of adsorbent selected from the group consisting of silica gel, alumina, activated carbon, and zeolite, and an adsorption unit container in which the adsorbent is accommodated in a sealed state, the adsorption unit container being detachably provided with respect to the gas suction path; The adsorption section is provided with a plurality of layers of at least two types of adsorbents selected from silica gel, alumina, activated carbon, and zeolite from the suction side to the discharge side, A gas removal system for laparoscopic surgery, characterized in that the adsorption section is arranged so that the adsorbent in each layer adsorbs less moisture from the gas than the adsorbent in the previous layer.

2. 2. The gas removal system for laparoscopic surgery according to claim 1, wherein the adsorption section has silica gel, alumina or activated carbon as an adsorbent in a first layer on the suction side, and zeolite as an adsorbent in a second layer following the first layer.

3. 2. The gas removal system for laparoscopic surgery according to claim 1, wherein the adsorption section comprises silica gel as an adsorbent in a first layer on the suction side, alumina or activated carbon as an adsorbent in a second layer following the first layer, and zeolite as an adsorbent in a third layer following the second layer.

4. 2. The gas removal system for laparoscopic surgery according to claim 1, wherein the adsorption section comprises silica gel as an adsorbent in a first layer on the suction side, alumina as an adsorbent in a second layer following the first layer, activated carbon as an adsorbent in a third layer following the second layer, and zeolite as an adsorbent in a fourth layer following the third layer.

5. 5. A gas removal system for laparoscopic surgery as described in any one of claims 1 to 4, wherein the gas suction path is provided with a pump section that suctions gas within the abdominal cavity, and the gas within the abdominal cavity is suctioned through the gas suction path by the suction action of the pump section.

6. A gas removal system for laparoscopic surgery as described in any one of claims 1 to 4, wherein the gas storage section has an interior that is at a lower pressure or vacuum state than the pressure within the abdominal cavity, and the low pressure or vacuum state of the gas storage section causes gas within the abdominal cavity to be sucked through the gas suction path.

7. 7. A gas removal system for laparoscopic surgery as described in any one of claims 1 to 6, wherein the gas storage section comprises at least one type of adsorbent selected from the group consisting of silica gel, alumina, activated carbon, and zeolite, and a gas storage section container in which the adsorbent is contained, and the gas storage section container is detachably provided on the gas suction path.

8. 8. A gas removal system for laparoscopic surgery according to claim 1, wherein the gas storage section has an internal vacuum and is set at a temperature of 50 to 70 degrees.

9. 9. The gas removal system for laparoscopic surgery according to claim 1, wherein the gas suction path is provided with a gas-liquid separator for separating the suctioned gas from liquid.

10. 10. A gas removal system for laparoscopic surgery as described in any one of claims 1 to 9, wherein the interior of the adsorption section container is divided into a plurality of compartments via communicating holes, each compartment contains an adsorbent of the same or different material, the suction side end of the gas suction path is detachably connected to the compartment on the gas suction side, and the discharge side end of the gas suction path is detachably connected to the compartment on the gas discharge side.

11. 11. A gas removal system for laparoscopic surgery as described in claim 10, wherein the adsorption section container has a communicating hole at the upper part of the compartment, the suction side end of the gas suction path is detachably connected to the lower part of the compartment on the gas suction side, and the discharge side end of the gas suction path is detachably connected to the lower part of the compartment on the gas discharge side.

12. 12. A gas removal system for laparoscopic surgery as described in claim 11, wherein the adsorption section container has a filter provided in a lower region where the suction side end and the discharge side end of the gas suction path in the compartment are connected, and an adsorbent is disposed above the filter.

13. A gas suction passage having one end disposed within the abdominal cavity; a gas storage portion connected to the other end of the gas suction path, A gas removal system for laparoscopic surgery, which removes gas from within the abdominal cavity during laparoscopic surgery by aspirating the gas from within the abdominal cavity through the gas suction path and then storing the gas in the gas storage section, a gas supply passage having one end disposed in the abdominal cavity and the other end connected to a gas cylinder for supplying gas by an insufflation device; a gas circulation path having one end connected to the gas suction path and the other end connected to the gas supply path; an on-off valve provided in the gas suction passage on the gas storage portion side of a connection portion between the gas suction passage and the gas circulation passage, A gas removal system for laparoscopic surgery, characterized in that when the on-off valve is opened, gas in the abdominal cavity is sent to the gas storage section through the gas suction path, and when the on-off valve is closed, gas in the abdominal cavity is sent to the gas supply path through the gas suction path and the gas circulation path.

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