CN114176666A - Carbon dioxide pneumoperitoneum pipeline with constant pressure, constant temperature and humidification functions - Google Patents
Carbon dioxide pneumoperitoneum pipeline with constant pressure, constant temperature and humidification functions Download PDFInfo
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- CN114176666A CN114176666A CN202111627007.2A CN202111627007A CN114176666A CN 114176666 A CN114176666 A CN 114176666A CN 202111627007 A CN202111627007 A CN 202111627007A CN 114176666 A CN114176666 A CN 114176666A
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- 208000005646 Pneumoperitoneum Diseases 0.000 title claims abstract description 73
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 68
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 34
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 34
- 230000006870 function Effects 0.000 title abstract description 17
- 238000010438 heat treatment Methods 0.000 claims abstract description 97
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- 238000001514 detection method Methods 0.000 claims description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 36
- 239000008367 deionised water Substances 0.000 claims description 29
- 229910021641 deionized water Inorganic materials 0.000 claims description 29
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 21
- 229910052782 aluminium Inorganic materials 0.000 claims description 21
- 210000000683 abdominal cavity Anatomy 0.000 claims description 20
- 239000012528 membrane Substances 0.000 claims description 16
- 229910001220 stainless steel Inorganic materials 0.000 claims description 9
- 239000010935 stainless steel Substances 0.000 claims description 9
- 229920002635 polyurethane Polymers 0.000 claims description 6
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/00234—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3474—Insufflating needles, e.g. Veress needles
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/08—Accessories or related features not otherwise provided for
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- Heart & Thoracic Surgery (AREA)
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- Animal Behavior & Ethology (AREA)
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Abstract
The invention discloses a carbon dioxide pneumoperitoneum pipeline with constant pressure, constant temperature and humidification functions, and relates to the technical field of medical instruments for laparoscopic surgery. The pneumoperitoneum pipeline with constant pressure, constant temperature and humidifying functions provided by the invention can adjust the heating temperature and humidifying range of the gas according to different operation requirements, and provide carbon dioxide gas with constant temperature and high humidity. And has the flow regulating function to form a stable pressure pneumoperitoneum.
Description
Technical Field
The invention relates to the field of laparoscopic surgery medical instruments, in particular to a carbon dioxide pneumoperitoneum pipeline with constant pressure, constant temperature and humidifying functions.
Background
One of the key steps of laparoscopic surgery is the establishment of artificial pneumoperitoneum, i.e. a patient's abdomen is bulged by blowing carbon dioxide gas under a certain pressure into the abdominal cavity of the patient through a pneumoperitoneum machine to expose the surgical field and provide the surgical operation space. At present, the mainstream pneumoperitoneum machine adopted at home and abroad comprises a STORZ, an Olympus, a Schek and the like, which outputs carbon dioxide with the temperature of 20-21 ℃ and the relative humidity of 0.0002%, is dry and cold, does not conform to the physiological environment of 37 ℃ and 100% relative humidity of an abdominal cavity of a human body, can cause adverse conditions such as peritoneal surface drying, temperature reduction and the like, and even can cause certain damage to abdominal organs, thereby causing the postoperative recovery time of partial patients to be prolonged, pain, abdominal organ adhesion and other various postoperative complications. In response to the above problems, many clinical trials have shown that the above-mentioned undesirable conditions can be effectively alleviated if the gas is heated and humidified to approximate the physiological conditions of the abdominal cavity. Therefore, around how to heat and humidify carbon dioxide under the condition of ensuring stable abdominal gas pressure, many domestic research institutions and scientific and technical enterprises combine clinical use requirements, and in the aspects of applying heating and humidifying functions and improving pressure flow control, a plurality of improvement attempts are made on the traditional pneumoperitoneum machine, so that various schemes and model machine products are developed. Regarding the improvement scheme of heating, humidification function, mainly can divide into two kinds and realize the thinking: the first type is to connect a heating or humidifying device to the original pneumoperitoneum machine to achieve the actual effect. The representative product is a gas heating device and a pneumoperitoneum machine designed by 2016 overlook and the like, and the specific pneumoperitoneum machine is provided with an external gas heating device, so that the heat exchange area is increased and the heat exchange efficiency is improved by using a heating mode that a radiating fin is matched with a heating plate; the dynamic and stable control of the gas temperature is realized by linearly adjusting the heating power of the heating sheet in a mode of adjusting the duty ratio of a Pulse Width Modulation (PWM) signal. However, the gazing et al work with a heat sink to directly heat the gas, and do not consider the uniformity of the gas heating and the humidification requirements of the gasseous gas. The carbon dioxide heating and sterilizing device designed by Zhao Dong Sheng, et al, people Hospital, Henan province adopts an indirect heating method of copper spiral coil pipes, fully ensures the heat exchange time and the heating uniformity of gas, and effectively improves the heating effect of gas. It is through arranging the silicon rubber hot plate in sealed intracavity, to coiling spiral copper pipe above that and heat, the output gas of pneumoperitoneum machine flows through spiral copper intraduct and reaches the heating effect. A sample machine is also provided with a temperature sensor, a temperature protector and a digital temperature controller, the temperature can be fed back and adjusted through a control panel, and the output carbon dioxide gas can be controlled to be 37-42 ℃ in the final effect. But does not take into account the humidification requirements of the pneumoperitoneum gases. The requirement of pneumoperitoneum gas heating and humidifying is considered by people such as the Shu-enter military in the Sichuan tumor hospital, and the external device of the pneumoperitoneum machine with the heating and humidifying functions, which is researched by the people, can heat and humidify the gas at the same time. The device is divided into a heating and humidifying area and a water storage area. The heating and humidifying area completes the regulation and control of temperature and humidity through the micro heater, the atomizer, the humidity detector and the temperature detector, and simultaneously performs heating and humidifying work, and the water storage area guarantees the water supply of the humidifier through the liquid level detector and the micro pump. However, the device is only a simple scheme model, and no experiment and research is carried out on the actual engineering problems of heating and humidifying control accuracy, uniformity and the like. The chemotherapy drug abdominal cavity warm-heat atomization device for preventing tumor cells from being scattered caused by pneumoperitoneum, which is designed by Zhaojia et al, can heat and humidify carbon dioxide gas output by a pneumoperitoneum machine, and can also send atomized liquid medicine into an abdominal cavity. The device includes atomizing container and heating device, adopts the mode of directly placing atomizing container on heating device, treats atomizing liquid medicine and heats, and the rethread bubbling method heats the humidification to carbon dioxide to carry the chemotherapy medicine after the atomizing and get into patient's abdominal cavity. However, the device uses a bubbling method for heating and humidifying, and the process and the precision are difficult to control. The second type is a carbon dioxide pneumoperitoneum device which integrates the heating and humidifying functions on the basis of realizing pressure flow control and can be independently used. 2015, a constant-temperature variable-flow pneumoperitoneum machine researched by chenghua (cottage) medical instruments and other people, and the heating function is firstly integrated into the pneumoperitoneum machine at home. The heating device adopts a Positive Temperature Coefficient (PTC) heater, and carries out heat convection with flowing gas through a heat radiating fin so as to realize the heating effect. The heating scheme has the advantages that the contact area of the gas and the heating body, namely the heating area of the device, is increased by the radiating fins, the gas heat exchange efficiency is improved, the adopted PTC heater has small thermal resistance, and the automatic constant temperature can be realized. However, as the temperature rises, the PTC resistance value also increases continuously, and the actual heating power decreases rapidly, so that a more sufficient heat exchange manner and a heat dissipation means are required to ensure the heating power. In addition, the direct convection heat transfer method of the heating plate and the radiating fin has the problem of uneven gas temperature. And does not take into account the humidification requirements of the pneumoperitoneum gases. For the problem of how to improve the heating uniformity of gas, a constant-temperature pneumoperitoneum system special for tumor surgery designed by mine and the like in 2019 adopts a method of erecting spiral resistance wires in a local pipeline to carry out all-around heating on gas flowing through the system. Double-layer heat insulation cotton and a reflecting film are arranged to insulate the air in the pipeline, but the humidification requirement of the pneumoperitoneum air is not considered in the scheme. The pneumoperitoneum device used in the laparoscopy developed by Zhang Sail of army medical university and the like simultaneously realizes the integration of heating and humidifying functions. The device generates heated steam through the steam generator and mixes the steam with carbon dioxide gas so as to achieve the purposes of heating and humidifying. The both ends of shell link to each other with the inner shell and form and hold the chamber, and the lateral wall UNICOM of steam connecting pipe and shell. After the heating steam enters the accommodating cavity, a plurality of steam nozzles which are uniformly distributed on the side wall of the inner shell enter the inner shell to be mixed with carbon dioxide, and carbon dioxide gas is heated and humidified. A plurality of stirrers are further arranged inside the inner shell to ensure the uniformity of mixing of the carbon dioxide gas and the hot steam. However, this device has the disadvantage that it can only be used for roughly adjusting the temperature and humidity, and it is difficult to control the temperature and humidity parameters of the gas. The inventor of the eagle sight medical science and technology has studied a pneumoperitoneum device with more accurate pressure control. The pressure reduction adjustment on the gas pressure in a large range is realized through two-stage pressure reducing valves, the pipeline flow is adjusted through a proportional valve, pressure sensors are arranged at the positions of a gas source outlet, the front and the back of a pressure difference filter element and an abdominal cavity inlet to monitor the internal pressure of a gas cylinder, the front and the back pressure difference of the pressure difference filter element and the pressure of the abdominal cavity respectively, and the flow is indirectly calculated through pressure measurement by utilizing the characteristic that the pressure difference at the two ends of the pressure difference filter element and the gas flow are in a linear relation. Through the pressure multistage feedback mechanism, the pressure loss is compensated in the control system, and the effect of accurate linear control of the outlet pressure is realized. And a heating function is added subsequently, so that a pneumoperitoneum product capable of stabilizing pressure and heating is formed. This does not take into account the humidification requirements of the pneumoperitoneum gases. A constant temperature variable flow pneumoperitoneum machine researched by Chenghua et al integrates a heating scheme and also considers the pressure flow control with a heating device. It arranges pressure switch behind the one-level relief pressure valve and reports to the police and monitors gas cylinder capacity, arranges the second grade relief pressure valve and reduces pressure to fixed value 0.07Mpa to arranged the proportional control valve in the pipeline and adjusted the flow, and arrange pressure sensor and feed back the actual pressure after the gas heating in heating intracavity portion, thereby realize stable closed loop, eliminate the influence that the heating process brought. In addition, considering the pipeline pressure safety and the medical cleanness, the device also arranges a multi-stage pressure relief device and a filtering device in the pipeline, and two electromagnetic switch valves are arranged at the positions close to the abdominal cavity inlet, so that a three-way gas circuit is realized, the sudden pressure change of the abdominal cavity is convenient to deal with, and the safety of the abdominal cavity is ensured. The device is comprehensively considered in the aspects of pipeline stability, abdominal cavity safety and gas cleanness, and forms a domestic leading pneumoperitoneum machine product, namely the latest pneumoperitoneum machine product Q300-40L of the company. This product can guarantee when realizing the heating function: the gas injection pressure is 5 mmHg-25 mmHg adjustable, the gas flow rate is 2L/min-40L/min stepless speed regulation, the pressure control precision is +/-1 mmHg, and the flow rate allowable deviation is +/-20%. But does not take into account the humidification requirements of the pneumoperitoneum gases.
It can be seen that the pneumoperitoneum device used in the hospital at present has a lower temperature of the output carbon dioxide gas, is relatively dry, and is not in accordance with the warm and humid environment inside the abdominal cavity, and the heating and humidifying improvement scheme of the pneumoperitoneum device in China mainly aims at the improvement of the heating requirement of the pneumoperitoneum gas, mostly does not consider the humidifying requirement of the pneumoperitoneum gas, and the prior art scheme is difficult to realize the uniform heating and controllable humidification of the gas.
Therefore, those skilled in the art are dedicated to develop a carbon dioxide pneumoperitoneum pipeline with constant pressure, constant temperature and humidification functions to achieve uniform heating and controllable humidification of gas.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the technical problems to be solved by the present invention include: how to solve pneumoperitoneum device output gas dry and cold problem, realize the even heating and controllable humidification to pneumoperitoneum gas, keep the warm, moist physiological environment of abdominal cavity inside.
In order to achieve the purpose, the invention provides a carbon dioxide pneumoperitoneum pipeline with constant pressure, constant temperature and humidification functions, which comprises a pressure adjusting pipeline, a flow adjusting detection pipeline, a gas humidification pipe, a gas heating pipe, a temperature and humidity detection pipe and a pressure detection pipeline which are sequentially connected.
Further, the pressure adjusting pipeline is provided with a secondary pressure reducing structure, the secondary pressure reducing structure comprises a high-pressure reducing valve and a linear pressure regulating valve, branch pipelines are arranged behind the high-pressure reducing valve and the linear pressure regulating valve, and a primary overflow valve and a secondary overflow valve are respectively arranged on the branch pipelines.
Furthermore, an electric proportional valve and a flow sensor are sequentially connected to the flow adjusting and detecting pipeline.
Furthermore, the gas humidifying pipe is provided with a proton exchange membrane, and further comprises a humidifying pipe gas inlet, a deionized water inlet, a humidifying pipe body, a deionized water outlet and a humidifying pipe gas outlet;
a circulating deionized water layer is arranged outside a proton exchange membrane of the humidifying pipe body, and circulating gas to be humidified is introduced into the proton exchange membrane;
deionized water is configured to enter through the deionized water input port and contact with the circulating deionized water layer, and flows out of the deionized water output port after the circulating gas to be humidified is humidified through the proton exchange membrane.
Further, the gas heating pipe selects a cast aluminum heating device, and the cast aluminum heating device comprises a W-shaped stainless steel coil pipe and a cast aluminum heating pipe.
Further, a polyurethane heat-insulating layer is arranged outside the gas heating pipe.
Furthermore, the temperature and humidity detection tube comprises a detection tube air inlet, a detection tube air outlet, a hollow cylindrical tube body, a left end cover, a right end cover and two fixed pressing codes.
Furthermore, a plurality of pipe thread joints are installed on the end cover, and the pipe thread joints are respectively screwed into the micro differential pressure sensor connecting pipe with threads, the temperature sensor and the humidity sensor in a sealing mode.
Furthermore, the pressure detection pipeline comprises a micro differential pressure sensor and an output gating valve group, and the micro differential pressure sensor is connected with the micro differential pressure sensor connecting pipe.
Further, the output gate valve group comprises a pressure release switch valve and a pneumoperitoneum switch valve, the micro-differential pressure sensor is connected with one end of a T-shaped three-way joint, the other two ends of the T-shaped three-way joint are respectively connected with the pressure release switch valve and the pneumoperitoneum switch valve, and the pneumoperitoneum switch valve 45 is connected with an abdominal cavity container.
Compared with the prior art, the invention has the following technical effects:
the invention realizes the safe control of pneumoperitoneum pressure flow by using a multistage pressure regulating structure, and can be applied to the actual laparoscopic surgery. The invention adopts the combination of the 304 stainless steel coil pipe and the cast aluminum heater, thereby not only meeting the clean requirement of medical use, but also realizing uniform gas heating effect and adjusting the heating temperature according to the use requirement; the invention adopts the Nafion humidifying tube to realize that the relative humidity level which is close to the abdominal cavity and is higher than 90 percent is difficult to be controllably achieved by the conventional humidifying method, and the humidifying range can be adjusted according to different use requirements; meanwhile, the self-made temperature and humidity detection pipe is used for realizing the sealing connection measurement of the temperature and humidity sensor and the gas transmission pipeline, the 304 stainless steel hollow cylindrical pipe is adopted to integrate the temperature and humidity sensor, and the heat insulation layer is added outside the cylindrical pipe to reduce the heat loss.
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.
Drawings
FIG. 1 is a schematic flow diagram of a carbon dioxide pneumoperitoneum circuit according to the present invention;
FIG. 2 is a schematic structural view of a gas humidifying pipe of the present invention;
FIG. 3 is a schematic structural view of a gas heating pipe of the present invention;
FIG. 4 is a front view of the temperature and humidity sensing tube of the present invention;
FIG. 5 is a perspective view of the temperature and humidity sensing tube of the present invention;
FIG. 6 is a schematic diagram of the structure of the apparatus of the present invention;
FIG. 7 is a front view of the apparatus of the present invention;
in the figure: 1-an integral pneumoperitoneum pipeline, 2-an air source, 3-a pressure adjusting pipeline, 4-a flow adjusting detection pipeline, 5-a gas humidifying pipe, 6-a gas heating pipe, 7-a temperature and humidity detection pipe, 8-a pressure detection pipeline, 9-a pneumoperitoneum container, 10-an air inlet pipeline, 11-a high-pressure reducing valve, 12-a high-pressure sensor, 13-a first-stage overflow valve, 14-a linear pressure regulating valve, 15-a second-stage overflow valve, 16-a one-way valve, 17-a pressure regulating output pipeline, 18-an electric proportional valve, 19-a flow sensor, 20-a flow limiting output pipeline, 21-a humidifying pipe air inlet, 22-a deionized water inlet, 23-a humidifying pipe body, 24-a deionized water outlet and 25-a humidifying pipe air outlet, 26-a circulating deionized water layer, 27-a proton exchange membrane, 28-circulating gas, 29-a heating pipe air inlet bent pipe, 30-a heating pipe air outlet bent pipe, 31-a polyurethane heat insulation layer, 32-a W-shaped stainless steel coil pipe, 33-a cast aluminum heating pipe, 34-a cast aluminum thermal contact body, 35-a detection pipe air inlet, 36-an end cover, 37-a hollow cylindrical pipe body, 38-a temperature sensor, 39-a humidity sensor, 40-a detection pipe air outlet, 41-a fixed pressing code, 42-a micro-differential pressure sensor connecting pipe, 43 micro-differential pressure sensors, 44-a pressure release switch valve and 45-a pneumoperitoneum switch valve.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings for clarity and understanding of technical contents. The present invention may be embodied in many different forms of embodiments and the scope of the invention is not limited to the embodiments set forth herein.
In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. The thickness of the components may be exaggerated where appropriate in the figures to improve clarity.
Example 1
As shown in fig. 1, the pneumoperitoneum tube with constant pressure, constant temperature and humidification function provided in this embodiment includes: the device comprises a pressure adjusting pipeline 3, a flow adjusting and detecting pipeline 4, a gas humidifying pipe 5, a gas heating pipe 6, a temperature and humidity detecting pipe 7 and a pressure detecting pipeline 8; the pressure adjusting pipeline 3 uses a two-stage pressure reducing structure of a high-pressure reducing valve 11 and a linear pressure regulating valve 14, and is matched with a two-stage overflow valve (a first-stage overflow valve 13 and a second-stage overflow valve 15), a high-pressure sensor 12 and a one-way valve 16 to realize the control of pipeline pressure; the flow adjusting and detecting pipeline 4 measures and adjusts the gas flow by using an electric proportional valve 18 and a flow sensor 19; the gas heating pipe 6 is a cast aluminum heating device combining a stainless steel coil pipe and a cast aluminum heating pipe, and gas flows through the stainless steel coil pipe to realize indirect heating; the gas humidifying pipe 5 is a Nafion humidifying pipe using a proton exchange membrane, and humidifies gas in the pipe by circulating external deionized water; the temperature and humidity detection tube 7 is a hollow cylindrical heat-preservation hard tube, a plurality of screwed joints are arranged on end covers at two sides of the temperature and humidity detection tube, and a temperature sensor 38 and a humidity sensor 39 with external threads are installed on the temperature and humidity detection tube; the pressure detection pipeline 8 comprises a micro differential pressure sensor 43 and an output gating valve group, and the gas transmission or pressure release of the switching valve is gated according to the pneumoperitoneum pressure condition.
The pressure adjusting pipeline 3 adopts a double-stage pressure reducing structure of a high-pressure reducing valve 11 matched with a linear pressure regulating valve 14 so as to solve the problems of overhigh pressure and overlarge pressure reducing ratio of the air source 2. High-pressure carbon dioxide gas of a gas source 2 flows into a high-pressure reducing valve 11 through an air inlet pipeline 10 to perform first-stage pressure reduction adjustment, and the pressure is reduced from 0.6Mpa to 16Mpa to 0-0.4 Mpa; in the second stage, the linear pressure regulating valve 14 is used for controlling the pressure difference, and the electric proportional valve 18 is used for achieving the purpose of linear pressure reduction by controlling the size of the opening of the valve; then the regulated gas is prevented from flowing back through the one-way valve 16, and the regulated gas is output through the pressure regulating output pipeline 17. Common pipe joints including elbow joints, threaded ferrule joints, and quick-connect fittings are used for pipe connections.
The pressure adjusting pipeline 3 considers the instability of the high-pressure working pipeline and the possible overpressure condition, an overflow valve is arranged after each stage of pressure reduction adjustment, and when the pressure of a local pipeline is too high, the overflow valve can be opened automatically to exhaust until the pressure returns to normal. The overpressure exhaust pressure of the first-stage overflow valve 13 is set to 0.4Mpa, and the overpressure exhaust pressure of the second-stage overflow valve 15 is set to 0.2 Mpa. And the characteristics that the inlet pressure of the high-pressure reducing valve 11 is reduced and the outlet pressure is increased are utilized, the pressure of the air source after being reduced is monitored by using the high-pressure sensor 12, and the pipeline work abnormality caused by insufficient capacity of the air bottle is avoided.
The flow adjustment detection pipeline 4 feeds back real-time gas flow by using an electric proportional valve 18 and a flow sensor 19, and limits the flow range according to the operation stage. The electric proportional valve 18 adjusts the opening size linearly, so that the linear adjustment of the flow rate is realized under a certain pressure difference. Then the flow sensor 19 feeds back the pipeline flow to form closed-loop control, and the gas meeting the flow requirement is output.
The gas humidifying pipe 5 is a Nafion humidifying pipe using a proton exchange membrane 27, and as shown in fig. 2, is composed of a humidifying pipe air inlet 21, a deionized water inlet 22, a humidifying pipe body 23, a deionized water outlet 24, and a humidifying pipe air outlet 25. When the humidification device is used, due to the use requirement of the proton exchange membrane 27, deionized water needs to be circularly introduced through the deionized water inlet 22 and the deionized water outlet 24, a circulating deionized water layer 26 outside a membrane is formed in the humidification tube body 23, and circulating gas 28 to be humidified is introduced into the membrane, so that a water molecule pressure difference is formed on two sides of the proton exchange membrane 27, and the circulating gas 28 is humidified.
The gas humidifying pipe 5 can humidify the gas with the flow rate of 0-40Lpm to the relative humidity of more than 90 percent, and the humidity state close to the abdominal cavity of the animal/human body is achieved. Compared with the conventional ultrasonic atomization humidifying device, the humidifying device has the advantages that no small liquid drops exist in the humidifying gas, and water molecules are distributed in the circulating gas 28 in a gaseous state, so that the humidifying device has a more sufficient humidifying effect. Compared with a conventional constant-temperature water bath humidifying/boiling water humidifying device, the humidifying device has the advantages that the humidifying effect of high relative humidity is realized, and meanwhile, the relative humidity of gas at the air outlet 25 of the humidifying pipe can be further adjusted by changing the circulating flow rate of deionized water outside the humidifying pipe film and the temperature of the deionized water.
The gas heating pipe 6 is a cast aluminum heating device 34 which is self-manufactured by using a W-shaped stainless steel coil 32 and a cast aluminum heating pipe 33, and as shown in fig. 3, is composed of a heating pipe inlet elbow 29, a heating pipe outlet elbow 30, a polyurethane heat-insulating layer 31, a W-shaped stainless steel coil 32, a cast aluminum heating pipe 33 and a cast aluminum thermal contact body 34.
When the gas heating pipe 6 is used, the cast aluminum heating pipe 33 is electrified to generate heat in high power, and thermal contact is formed between the cast aluminum thermal contact body 34 and the W-shaped stainless steel coil 32, so that the wall of the coil is heated, and the uniform heating of the air in the coil is finally realized. The cast aluminum thermal contact 34, in addition to serving as a heat transfer medium, also has the effect of absorbing the excessive heat of the cast aluminum heating pipe 33 and stabilizing the heating temperature. A polyurethane heat-insulating layer 31 is also arranged outside the whole gas heating pipe to insulate the whole cast aluminum heating device. When the heating temperature reaches the set temperature, the cast aluminum heating pipe 33 stops working, and the polyurethane insulation layer 31 and the cast aluminum thermal contact body 34 can effectively maintain the heating temperature for a period of time.
The temperature and humidity detecting tube 7 is a cylindrical tube made of acrylic or stainless steel, and as shown in fig. 4 to 5, is composed of a hollow cylindrical tube body 37, two left and right end covers 36 and a pair of fixed pressing blocks 41, wherein the left and right end covers 36 are respectively provided with a plurality of tube threaded joints, and can be respectively screwed with a micro differential pressure sensor adapter 42 with threads, a temperature sensor 38 and a humidity sensor 39 in a sealing manner.
When the temperature and humidity detection tube 7 is used, circulating gas flows in through the detection tube air inlet 35 and flows out through the detection tube air outlet 40, and the two gas interfaces are hermetically connected with the end covers of the temperature and humidity detection tube through threaded sleeve joints. The temperature sensor 38 and the humidity sensor 39 are connected with the end cover in a sealing mode through sealing pipe threads and sealing rings to measure the temperature and the humidity of circulating gas in the hollow cylindrical pipe body 37 in real time, and a clamping sleeve joint with threads is further mounted on the same side of the gas outlet 40 of the detection pipe and used for being connected with a gas-belly pressure sensor connecting pipe to measure the gas pressure at the outlet of the detection pipe.
The pressure detection pipeline 8 uses the micro differential pressure sensor 43 and the output gate valve group to feed back the pneumoperitoneum pressure, realizes the gating of different output ports of the pipeline, and can carry out gas transmission or pressure release according to the real-time gas condition to protect the abdominal cavity of a patient. The output switching valve group is a pair of electromagnetic switch valves, one of which is a pneumoperitoneum switch valve 45 for opening the pneumoperitoneum and the other of which is a pressure release switch valve 44 for exhausting when the pneumoperitoneum pressure is too high.
Example 2
In the embodiment, an implementation manner of a device including a pneumoperitoneum pipeline 1 is provided, as shown in fig. 6 to 7, a gas source 2 is a medical carbon dioxide gas cylinder or a gas supply system, a gas inlet pipeline 10 can be a high-pressure gas passing pipe and is connected with a high-pressure reducing valve 11, then a T-shaped three-way joint is used for connecting a high-pressure sensor 12, the pressure capacity of the gas source 2 is detected and judged by using the characteristics of the gas inlet pressure reduction and the gas outlet pressure increase of the high-pressure reducing valve 11, then a first-stage overflow valve 13 and a linear pressure regulating valve 14 are connected in parallel through a Y-shaped three-way joint, the outlet end of the linear pressure regulating valve 14 is connected in parallel with a second-stage overflow valve 15 and a one-way valve 16 through a 90-degree elbow and the Y-shaped three-way joint, the outlet end of the one-way valve 16 is connected with an electric proportional valve 18, then connected with a flow sensor 19 through the 90-degree joint, and then the flow-limited gas is output by a flow-limiting output pipeline 20.
The gas after pressure regulation and current limitation is input into a humidifying pipe gas inlet through a current-limiting output pipeline 20, a gas humidifying pipe 5 forms a deionized water layer outside a humidifying pipe membrane through a deionized water inlet 22 and a deionized water outlet 24 to humidify the circulating gas, the humidified gas is output through a humidifying pipe gas outlet 25, and four interfaces of the gas humidifying pipe 5 are hermetically connected with the pipeline through threaded sleeve joints; then, the humidified gas is input into the heating pipe through the heating pipe gas inlet 29 for heating, and is output by the heating pipe gas outlet elbow 30, and two interfaces of the gas heating pipe 6 both use 304 stainless steel thread elbow clamping sleeve joints; the humidified and heated wet and hot gas is input into the temperature and humidity detection pipe through the detection pipe air inlet 35, is output from the detection pipe air outlet 40, is connected to the output air pipe of the pressure detection pipeline 8, and the pipe interface of the temperature and humidity detection pipe 7 can use a threaded elbow pipe clamping sleeve joint.
The pressure-regulating, flow-limiting, humidifying and heated gas is connected to the pressure detection pipeline 8 through a detection pipe gas outlet 40, and the detection pipe gas outlet 40 comprises a micro-differential pressure sensor connecting pipe 42 connected to a micro-differential pressure sensor 43 and an output gas pipe connected to an output gate valve group; then, the pressure release switch valve 44 and the pneumoperitoneum switch valve 45 are connected through the T-shaped three-way joint, respectively, and when the temperature and humidity of the circulating gas reach set values and the pneumoperitoneum pressure does not exceed the set values, the pneumoperitoneum switch valve 45 is opened to input the circulating gas into the abdominal cavity container 9.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. The utility model provides a carbon dioxide pneumoperitoneum pipeline with constant voltage, constant temperature, humidification function which characterized in that, carbon dioxide pneumoperitoneum pipeline is including the pressure adjustment pipeline, flow adjustment detection way, the gaseous humidification pipe that connect gradually, gas heating pipe, temperature and humidity detection pipe and pressure detection pipeline.
2. The carbon dioxide pneumoperitoneum tubing of claim 1, wherein the pressure adjustment tubing has a secondary pressure relief structure comprising a high pressure relief valve and a linear pressure regulating valve, each followed by a branch tubing having a first level relief valve and a second level relief valve mounted thereon, respectively.
3. The carbon dioxide pneumoperitoneum circuit according to claim 1, wherein an electric proportional valve and a flow sensor are connected to the flow adjustment and detection circuit in sequence.
4. The carbon dioxide pneumoperitoneum circuit of claim 1, wherein the gas humidification tube has a proton exchange membrane, the gas humidification tube further comprising a humidification tube gas inlet, a deionized water inlet, a humidification tube body, a deionized water outlet, and a humidification tube gas outlet;
a circulating deionized water layer is arranged outside a proton exchange membrane of the humidifying pipe body, and circulating gas to be humidified is introduced into the proton exchange membrane;
deionized water is configured to enter through the deionized water input port and contact with the circulating deionized water layer, and flows out of the deionized water output port after the circulating gas to be humidified is humidified through the proton exchange membrane.
5. The carbon dioxide pneumoperitoneum circuit of claim 1, wherein said gas heating tube is selected from cast aluminum heating devices comprising a W-shaped stainless steel coil and a cast aluminum heating tube.
6. The carbon dioxide pneumoperitoneum circuit of claim 5, wherein a polyurethane insulation layer is disposed outside the gas heating tube.
7. The carbon dioxide pneumoperitoneum circuit of claim 1, wherein the temperature and humidity sensing tube comprises a sensing tube inlet, a sensing tube outlet, a hollow cylindrical tube body, left and right end caps, and two fixed compression codes.
8. The carbon dioxide pneumoperitoneum conduit according to claim 7, wherein said end cap has a plurality of threaded pipe fittings mounted thereon, said threaded pipe fittings being sealingly threaded into the threaded micro-differential pressure sensor nipple, the temperature sensor and the humidity sensor, respectively.
9. The carbon dioxide pneumoperitoneum circuit of claim 1, wherein said pressure sensing circuit comprises a micro differential pressure sensor and an output gate valve set, said micro differential pressure sensor being connected to said micro differential pressure sensor connection.
10. The carbon dioxide pneumoperitoneum circuit of claim 9, wherein the output gate valve set comprises a pressure release switch valve and a pneumoperitoneum switch valve, the micro-pressure difference sensor is connected to one end of a T-shaped three-way joint, the other two ends of the T-shaped three-way joint are respectively connected to the pressure release switch valve and the pneumoperitoneum switch valve, and the pneumoperitoneum switch valve 45 is connected to an abdominal cavity container.
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| JPH05207970A (en) * | 1992-01-31 | 1993-08-20 | Olympus Optical Co Ltd | Pneumoperitoneum device |
| US20020015867A1 (en) * | 2000-07-28 | 2002-02-07 | Joe Cargnelli | Method and apparatus for humidification and temperature control of incoming fuel cell process gas |
| CN101165953A (en) * | 2006-10-17 | 2008-04-23 | 上海博能同科燃料电池系统有限公司 | Humidification system for small-sized PEM fuel battery test platform |
| JP2009131467A (en) * | 2007-11-30 | 2009-06-18 | Olympus Medical Systems Corp | Pneumoperitoneum device and pneumoperitoneum system |
| JP2016185227A (en) * | 2015-03-27 | 2016-10-27 | オリンパス株式会社 | Pneumoperitoneum device, and operation method of pneumoperitoneum device |
| CN111685831A (en) * | 2020-06-15 | 2020-09-22 | 南京图格医疗科技有限公司 | Constant-pressure variable-flow pneumoperitoneum machine |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05207970A (en) * | 1992-01-31 | 1993-08-20 | Olympus Optical Co Ltd | Pneumoperitoneum device |
| US20020015867A1 (en) * | 2000-07-28 | 2002-02-07 | Joe Cargnelli | Method and apparatus for humidification and temperature control of incoming fuel cell process gas |
| CN101165953A (en) * | 2006-10-17 | 2008-04-23 | 上海博能同科燃料电池系统有限公司 | Humidification system for small-sized PEM fuel battery test platform |
| JP2009131467A (en) * | 2007-11-30 | 2009-06-18 | Olympus Medical Systems Corp | Pneumoperitoneum device and pneumoperitoneum system |
| JP2016185227A (en) * | 2015-03-27 | 2016-10-27 | オリンパス株式会社 | Pneumoperitoneum device, and operation method of pneumoperitoneum device |
| CN111685831A (en) * | 2020-06-15 | 2020-09-22 | 南京图格医疗科技有限公司 | Constant-pressure variable-flow pneumoperitoneum machine |
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| CN114176666B (en) | 2023-11-14 |
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