pneumoperitoneum filter tube

Abstract

This invention provides a pneumoperitoneum filter tube comprising a gas filter matched to the CO2 outlet of a pneumoperitoneum machine, a gas supply pipe, and a gas supply interface; the gas filter contains a filter membrane with an area not less than a certain value, the filter membrane having a pore size of 0.2-0.5 μm and an area of ​​25-35 cm². 2 The gas supply pipe has a diameter of 4-6mm and a length of 1.5-2.5m. One end of the gas supply pipe is sealed and connected to the gas filter, and the other end is equipped with a Luer male connector. It has good sealing performance, low resistance, is easy to use, low cost, and is provided aseptically. It is disposable to avoid cross-infection.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and more particularly to pneumoperitoneum filter tubes. Background Technology

[0002] Laparoscopic surgery is now widespread, but the insufflation machine used to inject CO2 into the surgical cavity is repeatedly used. Its gas filter uses an anesthesiology department's artificial nose, which is prone to cross-infection with repeated use. At the same time, the air supply line uses silicone tubing, which is repeatedly sterilized and reused. The aging of the silicone can cause debris to enter the body with the gas, posing a health hazard. The connection between the air supply line and the artificial nose uses an endotracheal tube breathing interface. If it is used only once, the cost is high. If it is reused, it is prone to cross-infection and easy to fall off. The connection between the air supply line and the artificial nose may be poor or increase air supply resistance, causing inconvenience to clinical use.

[0003] There is an urgent clinical need for a disposable pneumoperitoneum filter tube that has good sealing properties, low resistance, is easy to use, and is inexpensive. Summary of the Invention

[0004] To address the aforementioned deficiencies in the prior art, the present invention provides an insufflation filter tube comprising a gas filter, an air supply pipe, and a Luer male connector sequentially connected to the CO2 outlet of an insufflation machine; the gas filter contains a filter membrane with a pore size of 0.2-0.5 μm; the air supply pipe has a diameter of not less than 3 mm and a length of 1.5-3.5 m.

[0005] Furthermore, the area of ​​the filter membrane is 25-35 cm². 2 .

[0006] Furthermore, the inner diameter of the air supply pipe is 4-6 mm, and the length is 1.5-2.5 m.

[0007] Furthermore, the gas filter also includes a housing and a pipe housing. The housing has a machine connection port with an inner diameter of 22mm, and the pipe housing has a pipe connection port adapted to the gas supply pipe. The edge of the filter membrane is sealed to the corresponding annular edge of the housing and the pipe housing, respectively.

[0008] Furthermore, connecting strips are provided on the outer side wall of the housing 13 and the outer side wall of the tube housing 14, with a weak zone in the center of the connecting strip.

[0009] Furthermore, several radially distributed longitudinal support plates are respectively arranged at corresponding positions inside the machine housing and the tube housing, and the filter membrane is sandwiched between the corresponding longitudinal support plates of the machine housing and the tube housing; the longitudinal support plates in the machine housing are hollowed out at the adjacent machine connection port, and the longitudinal support plates in the tube housing are hollowed out at the adjacent tube connection port; the hollowed-out area of ​​the longitudinal support plates in the machine housing is not less than 380 mm². 2 The perforated area of ​​the longitudinal support plate of the pipe shell is not less than 30mm. 2 .

[0010] Furthermore, the housing 13 and the tube housing 14 are respectively provided with corresponding positioning ports and positioning blocks. Through the engagement of the positioning ports and positioning blocks, the longitudinal support plate 16 in the housing 13 and the longitudinal support plate 16 in the tube housing 14 correspond to each other.

[0011] Furthermore, the air supply pipe is equipped with fixing accessories at a position 10-20cm away from the Luer male interface, including fixing clips, fixing tape and fixing rings.

[0012] The beneficial effects of this invention are:

[0013] 1. Use inexpensive, disposable pneumoperitoneum filter tubes to avoid cross-infection and prevent slough from entering the patient's body due to aging disinfection.

[0014] 2. The support plate with corresponding interface cutouts ensures that the filter membrane is firmly fixed without affecting the smooth flow of gas. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the pneumoperitoneum filter tube of the present invention;

[0016] Figure 2 This is a schematic diagram of the structure of the gas filter of the present invention;

[0017] Figure 3 This is an exploded schematic diagram of the pneumoperitoneum filter tube of the present invention;

[0018] Figure 4 This is a cross-sectional view of the pneumoperitoneum filter tube of the present invention;

[0019] Figure 5 This is a schematic diagram of the structure of the housing of the present invention;

[0020] Figure 6 This is a schematic diagram of the structure of the tube shell of the present invention;

[0021] Figure 7 This is a structural diagram of the integrally formed gas machine housing and pipe housing of the present invention;

[0022] In the picture,

[0023] 1. Gas filter; 2. Gas supply pipe; 3. Luer male connector; 11. Filter membrane; 12. Machine housing; 13. Pipe housing; 14. Longitudinal support plate; 15. Sealing port; 16. Longitudinal support plate. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solutions of the present invention and to make the above-mentioned features, objectives, and advantages of the present invention clearer and easier to understand, the present invention will be further described below with reference to embodiments. These embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0025] Combination Figure 1-6 As shown, the pneumoperitoneum filter tube of the present invention includes a gas filter 1, an air supply pipe 2, and a Luer male connector 3 that are sequentially connected to the CO2 outlet of the pneumoperitoneum machine; the gas filter 1 is provided with a filter membrane 11 with a pore size of 0.2-0.5μm; the air supply pipe 2 has a diameter of not less than 3mm and a length of 1.5-3.5m.

[0026] The free end of the gas filter 1 is connected to the CO2 gas outlet of the insufflator via an interface. The CO2 gas discharged from the insufflator is filtered by the gas filter 1 and enters the gas supply pipe 2. It flows through the gas supply pipe 2 and finally exits through the Luer male connector 3 at the end of the gas supply pipe 2. Finally, it enters the laparoscopic surgical cavity through the Luer female connector on the laparoscopic trocar, which is connected to the Luer male connector 3. This opens up the laparoscopic surgical space under gas pressure, creating a field of view and operating space for laparoscopic surgery. The filter membrane 11, with a pore size of 0.2-0.5μm, can filter out impurities in the gas, including bacteria and viruses, ensuring that the CO2 gas entering the surgical cavity is dust-free and sterile. During laparoscopic surgery, the insufflator is relatively close to the operating table. The 1.5-3.5m long gas supply pipe 2 is sufficient to connect the insufflator and the laparoscopic trocar. The diameter of the gas supply pipe 2 is not less than 3mm to meet the requirement of continuously supplying CO2 gas to the surgical cavity to maintain the gas pressure during surgery.

[0027] Furthermore, the area of ​​the filter membrane 11 is 25-35 cm². 2 The filter membrane 11 has relatively small pores. To reduce the resistance to CO2 supply from the pneumoperitoneum machine and ensure the normal progress of the surgery, the area of ​​the filter membrane 11 should be no less than 25 cm². 2 The preferred size is 25-35cm. 2 .

[0028] Furthermore, the gas supply tube 2 is a circular tube with an inner diameter of 4-6 mm and a length of 1.5-2.5 m. If the gas supply tube 2 is too thick, it will inevitably increase the traction on the abdominal paracentesis device during surgery, making it inconvenient to use; if it is too thin, it will increase the resistance to CO2 gas flow, which is detrimental to maintaining a stable gas pressure in the surgical cavity during surgery. An inner diameter of 4-6 mm is most suitable. If the gas supply tube 2 is too long, it will result in excess waste and increase inconvenience during use; if it is too short, it cannot provide a connection between the insufflator and the abdominal paracentesis device. 1.5-2.5 m is most suitable.

[0029] Furthermore, such as Figure 3The diagram shown is an exploded view of the gas filter 1. The gas filter 1 also includes a housing 12 and a pipe housing 13. Matching sealing ports 15 are respectively provided on adjacent sides of the housing 13 and the pipe housing 14. The filter membrane 11 is adapted to the sealing port 15, and its circumferential edge is held between the sealing ports 15 of the housing 12 and the pipe housing 13, and is fixed by the sealing ports 15 on both sides, and then heat-sealed through the sealing ports 15 on both sides. The housing 12 has a machine connection port with an inner diameter of 22mm, which matches the CO2 outlet of the insufflator; the pipe housing 13 has a pipe connection port adapted to the gas supply pipe 2.

[0030] The edges of the filter membrane 11 are sealed to the sealing ports 15 of the corresponding annular edges of the housing 12 and the tube housing 13. The gas filter 1 is preferably configured as a circular, square, or rectangular columnar body with interfaces on both sides. Regardless of the shape of the gas filter 1, the size of the filter membrane 11 should be adapted to the corresponding annular edges of the housing 12 and the tube housing 13. The circumferential edges of the filter membrane 11 are clamped and fixed between the corresponding annular edges of the housing 12 and the tube housing 13, and fixed by heat sealing, so that all CO2 gas entering through the housing 12 side must be filtered by the filter membrane 11 before reaching the tube housing 13 side.

[0031] Furthermore, in combination Figure 7 Connecting strips are provided on the outer walls of the housing 13 and the tube housing 14, with a weak zone in the center of the connecting strips. The connecting strips integrate the housing 13 and the tube housing 14 into a single component, allowing for integral injection molding and reducing costs. Simultaneously, it eliminates the need for a one-to-one matching and positioning process between the housing 13 and the tube housing 14. During production, the filter membrane 11 is placed into one of the housings, and then flipped over through the weak zone to align the openings on both sides of the housing, followed by heat sealing. This significantly improves production and assembly efficiency and reduces costs.

[0032] Furthermore, several longitudinal support plates 14 are respectively arranged at corresponding positions inside the housing 12 and the tube housing 13, and the filter membrane 11 is clamped between the corresponding longitudinal support plates 14 of the housing 12 and the tube housing 13. The longitudinal support plates 14 should be perpendicular to the gas flow section of the housing 12, that is, perpendicular to the filter membrane 11. The optimal selection of the longitudinal support plates 14 is to be radially distributed symmetrically along the center position of the housing 12 and the tube housing 13. The longitudinal support plates 14 corresponding to each other on both sides play a role in clamping and fixing the filter membrane 11 located therein. They also play an auxiliary role in clamping and fixing the filter membrane 11 at the matching annular opening of the housing 12 and the tube housing 13, so as to avoid the filter membrane 11 from twisting and deforming, which would lead to the leakage of the circumferential fixation of the filter membrane 11 when the circumferential opening of the housing 12 and the tube housing 13 is heat-sealed, resulting in a decrease in the product yield.

[0033] Furthermore, the longitudinal support plate 14 inside the housing 12 is hollowed out at the adjacent machine connection port, and the longitudinal support plate 14 inside the pipe housing 13 is hollowed out at the adjacent pipe connection port; the hollowed-out area of ​​the longitudinal support plate 16 of the housing 13 is not less than 380mm². 2 The hollow area of ​​the longitudinal support plate 16 of the tube shell 14 is not less than 30mm. 2 Before the CO2 gas reaches the filter membrane 11 through the machine connection port, part of the gas is turned at the machine connection port. The perforated area of ​​the longitudinal support plate 16 of the machine housing 13 is not less than 380 mm². 2 The cross-sectional area of ​​the gas in the pipe connection port should be no less than that of the machine connection port to ensure smooth gas flow. After CO2 gas is filtered by the filter membrane 11, some of the gas is redirected at the pipe connection port, and the perforated area of ​​the longitudinal support plate 16 of the housing 14 is no less than 30mm². 2 It should be no less than the cross-section of the gas supply pipe 2 to ensure smooth gas flow.

[0034] Furthermore, in combination Figure 2 The housing 13 and the tube housing 14 are respectively provided with corresponding positioning holes and positioning blocks. Through the engagement of the positioning holes and positioning blocks, the longitudinal support plates 16 inside the housing 13 and the tube housing 14 are aligned. During the production and assembly process, in order to ensure that the longitudinal support plates 16 of the housing 13 and the tube housing 14 can be aligned, thereby better fixing the filter membrane 11 and reducing the possibility of deformation and movement, positioning holes and positioning blocks are respectively opened on the housing 13 and the tube housing 14. When the two are engaged, the longitudinal support plates 16 inside the housing 13 and the tube housing 14 are exactly in a relative state.

[0035] Furthermore, a fixing accessory, including a fixing clip, fixing tape, and fixing ring, is installed 10-20 cm away from the Luer male connector 3 of the air supply tube 2. The air supply tube 2 is connected to the Luer female connector of the air inlet on the abdominal trocar via the Luer male connector 3. To reduce the traction of the air supply tube 2 on the abdominal trocar, the air supply tube 2 is fixed slightly away from the abdominal trocar in clinical practice, keeping the portion of the air supply tube 2 near the abdominal trocar loose, which facilitates various operations on the abdominal trocar during surgery. The fixing accessory facilitates this fixing operation.

[0036] In summary, the present invention provides a sterile, disposable pneumoperitoneum machine for laparoscopic surgery to supply air to the surgical cavity. It has a simple structure, low cost, and is easy to use.

[0037] The above embodiments are merely illustrative of the principles and effects of this patent application and are not intended to limit this patent application. Any person skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of this patent application. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this patent application shall still be covered by the claims of this patent application.

Claims

1. A pneumoperitoneum filter tube, characterized in that: The system includes a gas filter (1), a gas supply pipe (2), and a Luer male connector (3) sequentially connected to the CO2 outlet of the insufflator; the gas filter (1) contains a filter membrane (11) with a pore size of 0.2-0.5 μm and an area of ​​not less than 25 cm². 2 The free end of the gas filter (1) is provided with a machine connection port (12) with an inner diameter of 22mm; the gas supply pipe (2) has a diameter of not less than 3mm and a length of 1.5-3.5m; The gas filter (1) also includes a housing (13) and a pipe housing (14). The housing (13) and the pipe housing (14) are respectively provided with matching sealing ports (15) on adjacent sides. The filter membrane (11) is adapted to the sealing port (15), and the circumferential edge of the filter membrane (11) is held between the sealing ports (15) of the housing (13) and the pipe housing (14). The machine housing (13) and the pipe housing (14) are respectively provided with a number of radially distributed longitudinal support plates (16) at corresponding positions. The filter membrane (11) is sandwiched between the corresponding longitudinal support plates (16) of the machine housing (13) and the pipe housing (14). The longitudinal support plates (16) in the machine housing (13) are hollowed out at the adjacent machine connection port (12), and the longitudinal support plates (16) in the pipe housing (14) are hollowed out at the adjacent gas supply pipe (2).

2. The pneumoperitoneum filter tube according to claim 1, characterized in that: The filter membrane (11) has an area of ​​25-35 cm². 2 The gas supply pipe (2) has an inner diameter of 4-6 mm and a length of 1.5-2 m.

3. The pneumoperitoneum filter tube according to claim 1, characterized in that: Connecting strips are provided on the outer side wall of the housing (13) and the outer side wall of the tube housing (14), with a weak zone in the center of the connecting strip.

4. The pneumoperitoneum filter tube according to claim 1 or 3, characterized in that: The hollow area of ​​the longitudinal support plate (16) of the housing (13) is not less than 380mm. 2 The perforated area of ​​the longitudinal support plate (16) of the tube shell (14) is not less than 30mm. 2 .

5. The pneumoperitoneum filter tube according to claim 3 or 4, characterized in that: The housing (13) and the tube housing (14) are respectively provided with corresponding positioning ports and positioning blocks. Through the matching of the positioning ports and positioning blocks, the longitudinal support plate (16) in the housing (13) and the longitudinal support plate (16) in the tube housing (14) correspond to each other.

6. The pneumoperitoneum filter tube according to claim 1, characterized in that: The gas supply pipe (2) is equipped with fixing accessories at a position 10-20cm away from the Luer male interface (3), including fixing clips, fixing tape and fixing rings.

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