Constant-pressure pneumoperitoneum equipment

Abstract

The utility model discloses constant-pressure pneumoperitoneum equipment which comprises a pneumoperitoneum machine, a pressure stabilizing bag and a puncture instrument used for puncturing an abdominal cavity. The pneumoperitoneum machine is used for providing carbon dioxide gas, the pressure stabilizing bag is connected with the pneumoperitoneum machine through an air inlet pipeline, the pressure stabilizing bag is made of flexible materials and used for shrinking, expanding and deforming along with changes of air pressure, the pressure stabilizing bag is provided with a pressure stabilizing cavity, and an anti-backflow structure is arranged in the pressure stabilizing cavity. The puncture instrument is provided with a cavity allowing the surgical instrument to enter the abdominal cavity, the side wall of the puncture instrument is provided with a connecting port communicated with the cavity, and the connecting port is connected with the pressure stabilizing bag through an air outlet pipeline. According to the constant-pressure pneumoperitoneum equipment, the pressure stabilizing bag is made of the flexible material and can contract, expand and deform along with the change of air pressure, the pressure of stable airflow is achieved, and it is guaranteed that the operation view and space are unchanged. And an anti-backflow structure designed in the pressure stabilizing cavity can prevent smoke from entering an air inlet pipeline between the pressure stabilizing bag and the pneumoperitoneum machine, so that the influence on the operation of the pneumoperitoneum machine is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to pneumoperitoneum machine technical field, concretely relates to a constant pressure pneumoperitoneum equipment. BACKGROUND

[0002] Intestinal cancer refers to the malignant tumor appearing in the intestinal tract part. According to the position of tumor, there can be large intestinal cancer and small intestinal cancer. Among them, large intestinal cancer, also known as colorectal cancer, has a much higher incidence than small intestinal cancer, and is one of the common digestive tract malignant tumors. Intestinal cancer mainly manifests as abdominal pain, abdominal palpable mass and abnormal stool (mainly blood stool, mucous stool and purulent stool). Surgical resection of tumor is the most direct and effective treatment, but still needs adjuvant therapy such as radiotherapy, targeted therapy and immunotherapy to increase the survival period.

[0003] At present, with the development of surgical operation towards minimally invasive direction, laparoscopic surgery is widely used in surgical treatment of intestinal cancer due to its advantages of small trauma, light postoperative pain and rapid recovery. Laparoscopic surgery is a kind of minimally invasive surgery in which the doctor inserts special surgical instruments and camera devices into the abdominal cavity of the patient through several micro incisions in different positions of the patient's abdomen, and operates according to the real-time image. In addition to achieving the same medical effect as traditional open surgery, laparoscopic technology also has the advantages of small surgical incision, less intraoperative bleeding, not easy to be infected, light postoperative pain, rapid recovery and low incidence of complications.

[0004] One of the key steps of laparoscopic surgery is the establishment of artificial pneumoperitoneum, that is, the carbon dioxide gas with certain pressure is pumped into the abdominal cavity of the patient by the pneumoperitoneum machine to make the patient's abdomen bulge, so as to expose the surgical field and provide the operation space. However, due to the narrow space of the intestinal tract, the conventional laparoscopic pneumoperitoneum machine cannot provide continuous and stable carbon dioxide gas pressure, which often leads to the phenomenon that the surgical field in the rectal cavity is large at times and small at times, similar to the tide. Although the existing technology uses a pressure stabilizing bag to stabilize the pressure of airflow and ensure that the pneumoperitoneum machine provides continuous and stable carbon dioxide gas pressure. However, the existing pneumoperitoneum machine pressure stabilizing mechanism does not design an anti-backflow structure, and the smoke generated during the operation enters the pipeline along with the contraction of the pressure stabilizing bag, affecting the operation of the pneumoperitoneum machine. UTILITY MODEL CONTENTS

[0005] Therefore, it is necessary to provide a constant pressure pneumoperitoneum equipment in view of the problem that the existing pneumoperitoneum machine pressure stabilizing mechanism does not design an anti-backflow structure, and the smoke generated during the operation enters the pipeline along with the contraction of the pressure stabilizing bag, affecting the operation of the pneumoperitoneum machine.

[0006] A constant pressure pneumoperitoneum equipment comprises:

[0007] A pneumoperitoneum machine is used to provide carbon dioxide gas.

[0008] The pressure stabilizing bag is connected with the insufflation machine through the gas inlet pipe, and is made of flexible material to shrink and expand with the change of gas pressure.

[0009] The puncture instrument for puncturing into the abdominal cavity has a cavity for surgical instruments to enter the abdominal cavity, and a connecting port is arranged on the side wall of the puncture instrument and communicates with the cavity.

[0010] In one embodiment, the anti-backflow structure includes two oppositely arranged flexible films arranged at the gas inlet of the pressure stabilizing cavity, and the two flexible films are connected through a fixed point, and the gap between the two flexible films forms a channel for gas to pass through.

[0011] In one embodiment, a gas outlet head is installed at the gas inlet of the pressure stabilizing cavity, and the flexible film covers the gas outlet head.

[0012] In one embodiment, the pressure stabilizing bag has an installation area formed by two oppositely arranged film materials, and a connecting sleeve is installed on the installation area, one end of the connecting sleeve is connected with the gas inlet pipe, and the other end of the connecting sleeve penetrates into the pressure stabilizing cavity.

[0013] In one embodiment, the film material of the pressure stabilizing bag covering the connecting sleeve is provided with a reinforcing rib, and the reinforcing rib circumferentially surrounds the connecting sleeve.

[0014] In one embodiment, the puncture instrument is provided with a fixing assembly for fixing the puncture instrument to the abdominal wall.

[0015] In one embodiment, the fixing assembly includes an inflatable air bag fixed to the puncture instrument, a locking member screw-connected to the puncture instrument, and an inflation tube, which communicates with the inflatable air bag and extends in the side wall of the puncture instrument and penetrates out from the side of the locking member away from the inflatable air bag.

[0016] In one embodiment, the connecting port is detachably connected with the gas outlet pipe, and the connecting port is provided with a sealing cover for closing the port.

[0017] In one embodiment, the gas outlet pipe is provided with a flow regulating valve for adjusting the flow of gas.

[0018] In one embodiment, the inner diameter of the connecting port is greater than the maximum outer diameter of the flushing tube, the drainage tube or the sampling instrument.

[0019] The constant pressure pneumostoma device, the pneumostoma machine is used for providing gas such as carbon dioxide, entering into the constant pressure bag through the gas inlet pipeline, then entering into the connecting port through the gas outlet pipeline, and then entering into the abdominal cavity through the cavity of the puncture instrument to expose the operation visual field and provide the operation space. The constant pressure bag is made of flexible material, can be deformed by shrinking and swelling with the change of gas pressure, realizes the pressure of stable gas flow, and guarantees the invariability of the operation visual field and space. The anti-backflow structure designed in the constant pressure cavity can prevent smoke from entering into the gas inlet pipeline between the constant pressure bag and the pneumostoma machine, so as to avoid affecting the operation of the pneumostoma machine. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the specific embodiment of the present application, the drawings needed in the specific embodiment will be briefly introduced below. In all the drawings, the elements or parts are not necessarily drawn according to the actual proportion.

[0021] Figure 1 It is a structure schematic view of the constant pressure pneumostoma device in an embodiment;

[0022] Figure 2 It is a structure schematic view of the constant pressure pneumostoma device in an embodiment; Figure 1 It is a structure schematic view of the constant pressure pneumostoma device in an embodiment;

[0023] Figure 3 It is a structure schematic view of the constant pressure pneumostoma device in an embodiment; Figure 2 It is a semi-sectional view of the constant pressure bag shown in the figure;

[0024] Figure 4 It is a semi-sectional view of the constant pressure bag shown in the figure; Figure 2 It is a semi-sectional view of the constant pressure bag shown in the figure;

[0025] Figure 5 It is a structure schematic view of the constant pressure pneumostoma device in an embodiment; Figure 1 It is a structure schematic view of the constant pressure pneumostoma device in an embodiment;

[0026] Figure 6 It is a structure schematic view of the constant pressure pneumostoma device in an embodiment; Figure 5 It is a structure schematic view of the constant pressure pneumostoma device in an embodiment;

[0027] Reference signs:

[0028] 1-abdominal wall, 10-pneumostoma machine, 20-constant pressure bag, 201-film material, 21-constant pressure cavity, 22-anti-backflow structure, 221-flexible film, 222-fixing point, 23-mounting area, 24-connecting sleeve, 25-reinforcing convex rib, 26-reinforcing block, 27-gas outlet head, 30-puncture instrument, 31-cavity, 32-connecting port, 33-sealing cover, 34-flexible rope, 35-sealing valve, 40-gas inlet pipeline, 50-gas outlet pipeline, 60-fixing assembly, 61-inflatable air bag, 62-locking piece, 63-inflatable tube, 70-flow regulating valve. DETAILED DESCRIPTION

[0029] For the above purposes, features and advantages of the present application to be more apparent and understandable, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different manners, which are different from those described herein, and it can be easily modified by those skilled in the art without departing from the spirit and scope of the present application, and therefore the present application is not limited to the specific implementations disclosed below.

[0030] It should be noted that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can also be present. As used herein the terms "vertical", "horizontal", "left", "right" and similar expressions are used for the purpose of illustration only and are not intended to be limiting.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0032] Please refer to Figures 1 to 6 The constant pressure pneumostoma device in an embodiment includes a pneumostoma machine 10, a constant pressure bag 20 and a puncture instrument 30.

[0033] The pneumostoma machine 10 is a special device for establishing and maintaining pneumostoma in laparoscopic surgery, and the pneumostoma machine 10 is used to provide carbon dioxide gas, and the pneumostoma machine 10 can warm and humidify the carbon dioxide gas to avoid causing discomfort of the patient during the surgery and pain during the postoperative recovery period.

[0034] The constant pressure bag 20 is connected with the pneumostoma machine 10 through a gas inlet pipeline 40. The constant pressure bag 20 is made of flexible material and is used to shrink and expand and deform with the change of gas pressure. The constant pressure bag 20 has a constant pressure cavity 21, and the constant pressure cavity 21 is provided with an anti-backflow structure 22. The puncture instrument 30 is used to puncture into the abdominal cavity, and the puncture instrument 30 has a cavity passage 31 for the surgical instrument to enter the abdominal cavity. The side wall of the puncture instrument 30 is provided with a connecting port 32 which is in communication with the cavity passage 31, and the connecting port 32 is connected with the constant pressure bag 20 through a gas outlet pipeline 50.

[0035] The above constant pressure pneumostatus device, the carbon dioxide gas provided by the insufflator 10 enters into the pressure stabilizing bag 20 through the gas inlet pipeline 40, then enters into the connecting port 32 through the gas outlet pipeline 50, and further enters into the abdominal cavity through the lumen 31 of the puncture instrument 30 to expose the surgical field and provide the operation space. The pressure stabilizing bag 20 is made of flexible material and can be deformed by shrinking and swelling with the change of gas pressure to stabilize the pressure of gas flow and ensure the invariability of the surgical field and space. The anti-backflow structure 22 designed in the pressure stabilizing cavity 21 can prevent smoke from entering into the gas inlet pipeline 40 between the pressure stabilizing bag 20 and the insufflator 10 to avoid affecting the operation of the insufflator 10.

[0036] Please refer to Figure 1 In an embodiment, the insufflator 10 is provided with an output port, and the gas inlet pipeline 40 is connected with the output port to make the carbon dioxide gas provided by the insufflator 10 enter into the gas inlet pipeline 40. The connection between the gas inlet pipeline 40 and the output port can be sleeve connection or plug connection, or threaded connection between the gas inlet pipeline 40 and the output port. In the embodiment, the end of the gas inlet pipeline 40 is sleeved on the output port to realize the connection between the gas inlet pipeline 40 and the output port.

[0037] Please refer to Figures 2 to 4 In an embodiment, the pressure stabilizing bag 20 includes two pieces of film materials 201 arranged oppositely, and the film materials 201 are made of flexible material. The peripheries of the two pieces of film materials 201 are sealingly connected to form the pressure stabilizing cavity 21 of the pressure stabilizing bag 20. The flexible material can be plastic material such as polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS), polyurethane (PU) and the like, which have good flexibility and elasticity and can be deformed without being easily broken.

[0038] Of course, the flexible material can also be rubber material. Rubber is a natural flexible material, and synthetic rubber is an important supplement. These materials can maintain good flexibility and elasticity in high-temperature and low-temperature environments.

[0039] In an embodiment, the pressure stabilizing bag 20 has an installation area 23 formed by the two pieces of film materials 201 arranged oppositely. Since the installation area 23 is formed by the two pieces of film materials 201 arranged oppositely, the strength of this part can be increased. The installation area 23 can be provided with reinforcing ribs to further increase the strength of this part. The connecting sleeve 24 is installed in the installation area 23, i.e. the connecting sleeve 24 is located between the two pieces of film materials 201 and the film materials 201 cover the connecting sleeve 24. One end of the connecting sleeve 24 extends out of the pressure stabilizing bag 20 to be connected with the gas inlet pipeline 40, and the other end of the connecting sleeve 24 penetrates into the pressure stabilizing cavity 21 to serve as the gas inlet of the pressure stabilizing cavity 21.

[0040] Due to the connection between the air inlet pipe 40 and the pressure stabilizing bag 20, the weight of the pressure stabilizing bag 20 itself and the weight of the air outlet pipe 50 at the lower part of the pressure stabilizing bag 20 need to be borne. If the connection strength between the air inlet pipe 40 and the pressure stabilizing bag 20 is insufficient, the connection between the air inlet pipe 40 and the pressure stabilizing bag 20 is prone to falling off.

[0041] Therefore, the connecting sleeve 24 is located at the installation area 23 with increased strength of the pressure stabilizing bag 20. On the one hand, the connection between the connecting sleeve 24 and the pressure stabilizing bag 20 is stable and not prone to falling off, and on the other hand, the pressure stabilizing bag 20 can be prevented from being damaged, thereby ensuring the connection strength between the air inlet pipe 40 and the pressure stabilizing bag 20 and avoiding the separation between the air inlet pipe 40 and the pressure stabilizing bag 20. At the same time, the air inlet pipe 40 is not directly connected to the pressure stabilizing bag 20, which facilitates the disassembly and assembly between the air inlet pipe 40 and the pressure stabilizing bag 20 and facilitates the replacement of the air inlet pipe 40 and the pressure stabilizing bag 20.

[0042] In an embodiment, the connection between the connecting sleeve 24 and the air inlet pipe 40 can be a sleeving or plugging connection between the air inlet pipe 40 and the connecting sleeve 24, or a threaded connection between the air inlet pipe 40 and the connecting sleeve 24. In this embodiment, the air inlet pipe 40 is inserted into the connecting sleeve 24, and the air inlet pipe 40 and the connecting sleeve 24 are in interference fit, thereby ensuring the connection strength therebetween.

[0043] In an embodiment, the film material 201 of the pressure stabilizing bag 20 covering the connecting sleeve 24 is provided with a reinforcing rib 25, and the reinforcing rib 25 circumferentially wraps the connecting sleeve 24. Since the pressure stabilizing bag 20 is made of a flexible material, the reinforcing rib 25 is also made of a flexible material. The reinforcing rib 25 can be deformed to provide an elastic force to tightly clamp the connecting sleeve 24, thereby ensuring the stability of the installation of the connecting sleeve 24. In this embodiment, the reinforcing rib 25 is provided with multiple groups of reinforcing ribs 25 along the axial direction of the connecting sleeve 24, so as to ensure that the connecting sleeve 24 is uniformly stressed and the connection between the connecting sleeve 24 and the pressure stabilizing bag 20 is stable.

[0044] In an embodiment, the installation area 23 of the pressure stabilizing bag 20 is provided with two groups of reinforcing blocks 26, and the two groups of reinforcing blocks 26 are respectively located at the two sides of the connecting sleeve 24. The two ends of the reinforcing rib 25 are respectively connected to the two groups of reinforcing blocks 26. The reinforcing block 26 serves as an attachment point of the reinforcing rib 25, which can prevent the reinforcing rib 25 from tearing and damaging the pressure stabilizing bag 20. At the same time, the reinforcing block 26 can limit the connecting sleeve 24 to prevent the left and right movement of the connecting sleeve 24.

[0045] In an embodiment, the anti-backflow structure 22 comprises two flexible films 221 arranged oppositely at the gas inlet of the pressure stabilizing cavity 21, i.e. the inner wall of the pressure stabilizing cavity 21 is provided with two flexible films 221, and the connecting sleeve 24 is located at the end of the pressure stabilizing cavity 21 between the two flexible films 221. The two flexible films 221 arranged oppositely are connected through the fixing points 222, and the gap between the two flexible films 221 constitutes a channel for the gas to pass through.

[0046] In the anti-backflow structure 22, the carbon dioxide gas provided by the insufflation machine 10 enters the gas inlet pipe 40, then enters the connecting sleeve 24, and finally flows out from the port of the connecting sleeve 24. The flowing-out gas passes through the gap between the flexible films 221 and the fixing points 222, and enters the pressure stabilizing cavity 21. Since the flexible films 221 are soft, the pressure in the pressure stabilizing cavity 21 can realize the closure of the flexible films 221, and the gas in the pressure stabilizing cavity 21 cannot enter the connecting sleeve 24 through the gap between the flexible films 221, thereby realizing the anti-backflow function of the gas.

[0047] In an embodiment, the material of the flexible films 221 can be the same as that of the pressure stabilizing bag 20, i.e. plastic material or rubber material. The flexible films 221 are thin in thickness, and thus can be automatically closed under the action of the gas pressure. The fixing points 222 on the two flexible films 221 are uniformly distributed on the flexible films 221, so as to ensure the uniformity of the gas outlet of the flexible films 221. The fixing points 222 can be formed by riveting, or can be formed by heat melting between the flexible films 221.

[0048] In an embodiment, the gas outlet head 27 is installed at the gas inlet of the pressure stabilizing cavity 21, and the flexible films 221 cover the gas outlet head 27. Specifically, the gas outlet head 27 is installed at the end of the connecting sleeve 24 extending into the pressure stabilizing cavity 21. The gas outlet head 27 can extend into the flexible films 221 by a certain distance, so as to avoid that the flexible films 221 are closed at the gas inlet under the pressure of the pressure stabilizing cavity 21.

[0049] Please refer to Figure 5 and Figure 6 In an embodiment, the puncture instrument 30 is typically a laparoscope, and the puncture instrument 30 can also be other equipment which is punctured into the abdominal cavity and needs pneumoperitoneum. The airtight valve 35 is installed at the upper opening of the lumen 31 of the puncture instrument 30. The airtight valve 35 can prevent the carbon dioxide gas in the puncture instrument 30 from running out, and can also realize the passing of the surgical instrument. Specifically, the airtight valve 35 can be a silicone valve.

[0050] In an embodiment, the connection port 32 is detachably connected with the gas outlet pipe 50, and the connection port 32 is provided with a sealing cover 33 for closing the connection port 32. In this way, when the gas outlet pipe 50 is detached from the connection port 32 without gas insufflation, the sealing cover 33 can be used to close the connection port 32 to prevent external gas from entering the lumen 31 of the puncture instrument 30.

[0051] In an embodiment, the puncture instrument 30 is provided with a flexible rope 34 connecting the sealing cover 33. In this way, the sealing cover 33 can be connected by the flexible rope 34, so that the sealing cover 33 cannot be lost when the connection port 32 is used. Specifically, the flexible rope 34 can be made of rubber.

[0052] In an embodiment, the inner diameter of the connection port 32 is greater than the maximum outer diameter of the flushing tube, the drainage tube or the sampling instrument. That is, the connection port 32 has a large hole diameter, and the flushing tube, the drainage tube and the sampling instrument can all be inserted into the lumen 31 of the puncture instrument 30 through the connection port 32 to realize flushing, drainage or sampling, etc., thereby enriching the functions of the connection port 32.

[0053] It should be understood that surgical sampling is a key link in the surgical process, and the purpose is to obtain lesion or suspicious tissue for pathological examination to confirm diagnosis, assess lesion range, determine whether the surgical incision margin is clean or guide subsequent treatment. In the present embodiment, the sampling instrument is an instrument that can remove lesion or suspicious tissue in the abdominal cavity, such as a sampling forceps or a sampling scissors.

[0054] In an embodiment, the puncture instrument 30 is provided with a fixing assembly 60 outside the puncture instrument 30 for fixing the puncture instrument 30 to the abdominal wall 1 to prevent the puncture instrument 30 from being loosened from the abdominal wall 1 and ensure the stability of the puncture instrument 30. Specifically, the fixing assembly 60 includes an inflatable air bag 61, a locking member 62 and an inflation pipe 63. The inflatable air bag 61 is fixedly installed on the outer wall of the puncture instrument 30, the locking member 62 is threadedly installed on the puncture instrument 30, and the inflation pipe 63 is used to inflate the inflatable air bag 61 with gas to make the inflatable air bag 61 expand and become larger.

[0055] In specific use, the unexpanded inflatable air bag 61 enters the abdominal wall 1 together with the puncture instrument 30, and the locking member 62 is located outside the abdominal wall 1. Then, the inflatable air bag 61 is inflated with gas through the inflation pipe 63, the inflatable air bag 61 is inflated to fit the abdominal wall 1, and the locking member 62 is rotated to adjust the position of the locking member 62, so that the locking member 62 cooperates with the inflatable air bag 61 to clamp the abdominal wall 1, thereby fixing the puncture instrument 30 on the abdominal wall 1.

[0056] In an embodiment, in order to avoid the influence of the inflation tube 63 on the puncture of the puncture instrument 30, the inflation tube 63 extends in the side wall of the puncture instrument 30, one end of the inflation tube 63 penetrates through the outer wall of the puncture instrument 30 and communicates with the inflation air bag 61, and the other end of the inflation tube 63 penetrates out from the side of the locking member 62 away from the inflation air bag 61. The arrangement of the inflation tube 63 in the side wall of the puncture instrument 30 can avoid the influence on the puncture of the puncture instrument 30.

[0057] In an embodiment, the inflation air bag 61 is a circular ring shape, which ensures the uniformity of the force acting on the abdominal wall 1, and the locking member 62 is a nut. A gasket can be designed between the locking member 62 and the abdominal wall 1 to ensure the uniformity of the force acting on the abdominal wall 1 by the locking member 62, and to avoid the local excessive force of the locking member 62 causing pain to the patient.

[0058] In an embodiment, a flow regulating valve 70 is installed on the gas outlet pipeline 50, which can adjust the gas flow channel in the gas outlet pipeline 50 to adapt to the gas flow demand of different pneumoperitoneum during the operation. The gas inlet pipeline 40 and the gas outlet pipeline 50 are both corrugated pipes, which have good flexibility and can adapt to various complex pipeline layouts and bending requirements. It can be understood that in other embodiments, the gas inlet pipeline 40 and the gas outlet pipeline 50 can also be other pipelines with certain flexibility, such as silica gel pipelines.

[0059] The above constant pressure pneumoperitoneum device, the carbon dioxide gas provided by the pneumoperitoneum machine 10 enters the connecting sleeve 24 through the gas inlet pipeline 40, and then is discharged through the gas outlet head 27 into the two flexible membranes 221. The gas enters the pressure stabilizing chamber 21 through the gap between the two flexible membranes 221, the gas in the pressure stabilizing chamber 21 enters the connecting port 32 through the gas outlet pipeline 50, and then enters the abdominal cavity through the lumen 31 of the puncture instrument 30 to expose the operation field and provide the operation space. The pressure stabilizing bag 20 is made of flexible material and can deform by shrinking and swelling with the change of gas pressure to realize the pressure of stable gas flow and ensure the invariability of the operation field and space. The flexible membrane 221 is relatively soft, and the pressure in the pressure stabilizing chamber 21 can realize the closure of the flexible membrane 221 to realize the anti-backflow function of the gas, avoid the gas in the pressure stabilizing chamber 21 entering the gas inlet pipeline 40, and avoid affecting the operation of the pneumoperitoneum machine 10.

[0060] The above examples are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can still be modified, or some or all of the technical features can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application.

Claims

1. A constant pressure insufflation apparatus, characterized by, The utility model relates to a kind of medical devices, including: pneumostasis machine, for providing carbon dioxide gas; Pressure stabilizing bag, connected with the pneumostasis machine by gas inlet pipeline, the pressure stabilizing bag is made of flexible material for shrinking and expanding deformation along with the change of gas pressure, the pressure stabilizing bag has a pressure stabilizing cavity, and the pressure stabilizing cavity is provided with anti-backflow structure;And Puncture instrument for puncturing into abdominal cavity, the puncture instrument has cavity for surgical instrument to enter abdominal cavity, the side wall of the puncture instrument is provided with connecting port communicated with the cavity, and the connecting port is connected with the pressure stabilizing bag by gas outlet pipeline; The anti-backflow structure includes two pieces of flexible film arranged oppositely at the gas inlet of the pressure stabilizing cavity, and the two pieces of flexible film are connected by fixed point, and the gap between the two pieces of flexible film constitutes the channel for gas to pass through.

2. The constant pressure insufflation apparatus of claim 1, wherein, Gas outlet head is installed at the gas inlet of the pressure stabilizing cavity, and the flexible film covers the gas outlet head.

3. The constant pressure insufflation apparatus of claim 1, wherein, The pressure stabilizing bag has mounting area formed by two pieces of film material, and the mounting area is mounted with connecting sleeve, one end of the connecting sleeve is connected with the gas inlet pipeline, and the other end of the connecting sleeve penetrates into the pressure stabilizing cavity.

4. The constant pressure insufflation apparatus of claim 3, wherein, The film material of the pressure stabilizing bag covering the connecting sleeve is provided with reinforcing ribs, and the reinforcing ribs are circumferentially wrapped around the connecting sleeve.

5. The constant pressure insufflation apparatus of claim 1, wherein, The puncture instrument is provided with a fixing assembly for fixing the puncture instrument to the abdominal wall.

6. The constant pressure insufflation apparatus of claim 5, wherein, The fixing assembly includes an inflatable airbag fixed to the puncture instrument, a locking member threadedly connected to the puncture instrument, and an inflation tube in communication with the inflatable airbag and extending within the side wall of the puncture instrument, and the inflation tube extends out from the side of the locking member away from the inflatable airbag.

7. The constant pressure insufflation apparatus of any one of claims 1-6, wherein, The connecting port is detachably connected with the gas outlet pipeline, and the connecting port is provided with a sealing cover for closing the port.

8. The constant pressure insufflation apparatus of any one of claims 1-6, wherein, The gas outlet pipeline is provided with a flow regulating valve for adjusting the flow of gas.

9. The constant pressure insufflation apparatus of any one of claims 1-6, wherein, The inner diameter of the connecting port is greater than the maximum outer diameter of the irrigation tube, drainage tube or sampling instrument.

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