Valveless single hole capable of maintaining stable abdominal pressure
By designing a valve-free single-hole device, using airtight channels to maintain stable abdominal pressure and eliminating smoke through smoke exhaust channels, the problem of intra-abdominal pressure fluctuations caused by air leakage of the pneumoplegia machine and the problems of traditional smoke exhaust affecting the continuity of the surgery are solved, improving the safety and continuity of the surgery.
Patent Information
- Application Number
- CN202421882641.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-06
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-08-06
AI Technical Summary
The existing pneumoplegia machine has fluctuated intraperitoneal pressure due to air leakage during the operation, resulting in organ ischemia, peritoneal damage, increased cardiopulmonary burden and acidosis. The traditional smoke exhaust method affects the continuity and safety of the surgery.
A valve-free single-hole device is designed, including a filter assembly, a protective sleeve and a sealing body assembly, which has airtight passages, smoke exhaust passages and instrument passages. It maintains a stable abdominal pressure through the airtight passages, and promptly removes smoke and water vapor generated by the surgery through the smoke exhaust passages.
It achieves maintaining stable abdominal pressure during the operation, preventing gas leakage, and promptly eliminating smoke and water vapor, improving the continuity and safety of the operation, and reducing the harm to patients.
Smart Images
Figure CN223026100U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of medical devices, and particularly relates to a valve-free single port capable of maintaining stable abdominal pressure. Background Art
[0002] When cutting tissues during surgery, a large amount of smoke and water vapor will inevitably be generated. The smoke generated by the combustion of this organic matter in laparoscopic surgery, due to the fact that human organs or other tissues are squeezed together, there is not enough space for observation and surgery. At this time, an insufflator is required to provide air pressure to expand the internal cavity in order to provide a suitable surgical space and surgical field of view.
[0003] When the existing conventional insufflator works, the abdominal pressure is lower than the set value at the beginning of inflation. At this time, the inflation valve in the machine opens, and inflates into the abdominal cavity at a set flow rate. When the abdominal pressure (abdominal pressure) reaches the set value, the inflation valve closes and inflation stops. As the surgery progresses, air leakage occurs due to actions such as the entry and exit of the surgical trocar, flushing the abdominal cavity and aspirating the flushing fluid, and specimen removal. The abdominal pressure drops. When it is lower than the set value, the inflation valve opens again for inflation. The "inflation-pressure measurement" process of the conventional insufflator is called a working cycle. Such a working cycle is repeatedly repeated throughout the surgical process, that is, a periodic impact pressure is formed. The value of its impact pressure changes with the gas leakage during the surgical process.
[0004] This pressure change will cause the following results: (1) The ischemia-reperfusion-re-ischemia of abdominal viscera caused by this gas impact pressure may exacerbate the injury. (2) The basic and clinical studies on the morphological changes of the peritoneum caused by pneumoperitoneum are all based on the mode of the conventional pulsed insufflator. For example, some scholars have reported respectively that under the pneumoperitoneum environment, the mesothelial cells of the mouse peritoneum and the human peritoneum can be seen to be swollen, the connections between peritoneal mesothelial cells are broken, and the continuity of the basement membrane is interrupted under the electron microscope. (3) The increased burden on the heart and lungs caused by the instantaneous increase in intra-abdominal pressure may increase the probability of sudden death of patients during surgery, especially for the elderly and patients with pre-existing cardiopulmonary dysfunction. (4) As the surgical process prolongs and the surgical wound surface increases, the impact force caused by the instantaneous increase in pressure may increase the amount of CO2 gas entering the blood circulation through the wound surface, aggravating the acidosis of the patient. Therefore, in order to ensure the safety of the surgery, the stability of the air pressure provided by the insufflator is very important.
[0005] At the same time, during the surgical process, the electrocautery in the trocar is a strong carcinogen when cauterizing or electrocoagulating the human body, which will cause unnecessary harm to the surgeon and the medical staff in the operating room. Moreover, when performing deep surgery on the human body, especially when electrocauterizing important organs such as deep blood vessels, the smoke will make the endoscope inside blurred, affecting the vision of the medical staff, causing difficulty in hemostasis, and even causing the surgery to be blind or chaotic. Therefore, a smoke exhaust device is needed to ensure the smooth progress of the surgery.
[0006] Currently, the traditional method of exhausting smoke in the operating room is to open the exhaust valve of the trocar to directly exhaust the smoke until the field of view is clear and then close the valve. If the valve is not closed in time, the pneumoperitoneum pressure will decrease, and it is necessary to close the valve and wait for the pneumoperitoneum pressure to rise again before continuing the operation, which breaks the continuity of the operation. The chimney effect of the laparoscope causes the air flow to rush from the laparoscopic trocar to the operating room staff and be directly discharged into the operating room, causing harm to the bodies of the operating room staff and environmental pollution.
[0007] Therefore, it is necessary to design an instrument that can be used to maintain a stable abdominal pressure and has a smoke exhaust function. Utility Model Content
[0008] For this reason, the present utility model provides a valve-free single port that can maintain a stable abdominal pressure.
[0009] The technical solution provided by the present utility model is as follows:
[0010] A valve-free single port that can maintain a stable abdominal pressure includes a filtering component, a protective sleeve, and a sealing body component. The sealing body component includes a sealing main body hermetically assembled at the distal end of the protective sleeve and a valve-free device assembled on the sealing main body. The valve-free device has an airtight channel, a smoke exhaust channel, and an instrument channel; the proximal end of the instrument channel communicates with the inner cavity of the protective sleeve; the airtight channel communicates with the distal end of the instrument channel and forms an air outlet facing the proximal end of the instrument channel; the smoke exhaust channel is formed between the proximal ends of the airtight channel and the instrument channel and communicates with the instrument channel; the airtight channel and the smoke exhaust channel of the valve-free device are respectively communicated with the filtering component; the filtering component is connected to the protective sleeve or the sealing main body through a pneumoperitoneum channel to inject gas into the protective sleeve.
[0011] Further, the airtight channel of the valve-free device is an annular channel surrounding the outer periphery of the instrument channel, and the air outlet is arranged around the outer periphery of the instrument channel.
[0012] Further, the air outlet at the distal end of the airtight channel communicating with the instrument channel is an air outlet with a gradually decreasing diameter.
[0013] Further, the valve-free device includes a puncture sheath, a wind guiding seat, a lower flow guiding cover, and an upper flow guiding cover. The wind guiding seat, the lower flow guiding cover, and the upper flow guiding cover are sequentially assembled in the puncture sheath and jointly form the instrument channel; the puncture sheath, the wind guiding seat, and the lower flow guiding cover jointly enclose to form the smoke exhaust channel, and the puncture sheath, the lower flow guiding cover, and the upper flow guiding cover jointly enclose to form the airtight channel.
[0014] Further, the wind guiding seat includes a funnel-shaped outer seat body and a plurality of flow guiding vanes spaced on the inner wall of the outer seat body. The lower flow guiding cover covers the upper opening of the outer seat body and covers the flow guiding vanes. The upper opening end of the outer seat body is lower than the flow guiding vanes to form an opening communicating with the smoke exhaust channel.
[0015] Further, the lower flow guiding cover has a central hole, the upper flow guiding cover has a guiding cylinder section, the guiding cylinder section is inserted into the central hole of the lower flow guiding cover, the central channel of the guiding cylinder section of the upper flow guiding cover is part of the instrument channel, and an airtight channel is formed between the inner wall of the guiding cylinder section of the upper flow guiding cover and the central hole of the lower flow guiding cover, and the airtight channel communicates with an air outlet at the distal end of the instrument channel.
[0016] Further, three independent channels are formed in the filter assembly, namely a first filter channel, a second filter channel and a third filter channel; the filter assembly and the valve-less device are connected by a connecting pipe, and the connecting pipe has independent first and second channels. The first channel communicates the airtight channel and the first filter channel of the filter assembly, and the second channel communicates the smoke exhaust channel and the second filter channel of the filter assembly; the third filter channel of the filter assembly communicates with the pneumoperitoneum channel.
[0017] Further, a tearable tube is also connected to the outside of the connecting pipe. The head end of the tearable tube is connected to the filter assembly, and an air inlet interface is assembled on the protective cover or the seal body assembly. The tail end of the tearable tube is connected to the air inlet interface; the communication channel of the air inlet pipe and the tearable tube constitutes the pneumoperitoneum channel.
[0018] Further, a branch pipe is also externally connected to the connecting pipe, and the branch pipe communicates with the second channel; a smoke exhaust interface is also provided on the seal body or the protective cover, and the tail end of the branch pipe is connected to the smoke exhaust interface.
[0019] Further, the protective cover includes an inner protective film and an outer protective film. The outer protective film is arranged on the outer layer of the inner protective film and forms an annular air cavity. A trachea is connected to the distal end of the outer protective film, and one or more openings are provided on the inner protective film.
[0020] Further, the surface of the seal body is an arc surface; a plurality of valve devices are also assembled on the seal body. The valve device has an instrument channel and a seal member assembled on the instrument channel; the valve-less device and / or the valve device are detachably assembled on the seal body.
[0021] By the technical solution provided by the present utility model, the following beneficial effects are achieved:
[0022] 1. For the valve-less single hole of the present application, after the filter assembly is connected to the pneumoperitoneum machine, CO2 gas is introduced into the inner cavity of the protective cover through the pneumoperitoneum channel to achieve the pneumoperitoneum effect; gas is also introduced into the instrument channel through the airtight channel. The airtight channel communicates with the distal end of the instrument channel and forms an air outlet facing the proximal end of the instrument channel, so as to inject gas into the instrument channel and form a gas barrier to prevent leakage from the distal end of the instrument channel, realizing a valve-less structure.
[0023] 2. A smoke exhaust passage is formed between the proximal ends of the airtight passage and the instrument passage and communicates with the instrument passage. During the operation, the water vapor and smoke generated are sequentially returned to the filtering component through the instrument passage and the smoke exhaust passage for filtering, ensuring that the smoke generated during the operation can be timely removed and preventing harmful substances from being discharged; while the airtight passage replenishes gas in real time to maintain a stable abdominal pressure and ensure the continuous progress of the operation.
[0024] Using the valve - less single - port of the present application that can maintain a stable abdominal pressure and cooperating with the existing pneumoperitoneum machine can timely exhaust smoke and prevent harmful substances from being discharged while maintaining a stable abdominal pressure, greatly ensuring the continuity and safety of the operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 Shown is the three - dimensional schematic of the valve - less single - port that can maintain a stable abdominal pressure in the first embodiment Figure 1 ;
[0026] Figure 2 Shown is the three - dimensional schematic of the valve - less single - port that can maintain a stable abdominal pressure in the first embodiment Figure 2 ;
[0027] Figure 3 Shown is the cross - sectional view of the protective cover in the first embodiment;
[0028] Figure 4 Shown is the structural cross - sectional view of the valve - less device in the first embodiment;
[0029] Figure 5 Shown is Figure 4 the enlarged schematic view of area A in
[0030] Figure 6 Shown is the structural schematic view of the air - guiding seat in the first embodiment;
[0031] Figure 7 Shown is the partial structural exploded schematic view of the valve - less single - port that can maintain a stable abdominal pressure in the second embodiment;
[0032] Figure 8 Shown is the cross - sectional view of the protective cover in the fourth embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0033] To further illustrate each embodiment, the present utility model provides drawings. These drawings are a part of the disclosure of the present utility model, mainly used to illustrate the embodiments and can be combined with the relevant descriptions in the specification to explain the operating principle of the embodiments. With reference to these contents, those of ordinary skill in the art should be able to understand other possible implementation manners and the advantages of the present utility model. The components in the drawings are not drawn to scale, and similar component symbols are usually used to represent similar components.
[0034] In the description of the present invention, the terms "upper", "lower", "left", "right", "front", "rear" and other orientation or position relationships are based on the orientation or position relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.
[0035] In the following embodiments, the distal end refers to the end far from the abdominal cavity during use, which is the upper end in the drawings; the proximal end refers to the end close to the abdominal cavity during use, which is the lower end in the drawings.
[0036] The present utility model will be further described below in conjunction with the drawings and specific embodiments.
[0037] Embodiment 1
[0038] Referring to Figures 1 to 6 As shown, a valve-free single port capable of maintaining a stable abdominal pressure provided in this embodiment includes a filtering assembly 100, a protective sleeve 300, and a sealing body assembly 200. The sealing body assembly 200 includes a sealing main body 21 hermetically assembled at the distal end of the protective sleeve 300 (i.e., the end far from the abdominal cavity during use, which is the upper end in the drawings), and a valve-free device 22 assembled on the sealing main body 21. The valve-free device 22 has an airtight channel 202, a smoke exhaust channel 203, and an instrument channel 201. The proximal end of the instrument channel 201 communicates with the inner cavity 301 of the protective sleeve 300 for an instrument to be inserted from the outside. The airtight channel 202 communicates to the distal end (i.e., the upper end) of the instrument channel 201 and forms an air outlet 204 facing the proximal end (i.e., the lower end) of the instrument channel 201. The smoke exhaust channel 203 is formed between the proximal ends of the airtight channel 202 and the instrument channel 201 and communicates with the instrument channel; that is, the smoke channel 203 is closer to the proximal end of the instrument channel 201 than the airtight channel 202.
[0039] The airtight channel 202 and the smoke exhaust channel 203 of the valve-free device 22 communicate with the filtering assembly 100 respectively. The filtering assembly 100 is connected to the protective sleeve 300 or the sealing main body 21 through a pneumoperitoneum channel to inject gas into the protective sleeve 300. In this specific embodiment, the filtering assembly 100 is directly connected to the protective sleeve 300 through the pneumoperitoneum channel.
[0040] The valve - less single - port that can maintain a stable abdominal pressure adopted in this solution is used in conjunction with a pneumoperitoneum machine. That is, the pneumoperitoneum machine is connected to the filtering component 100, and CO₂ gas is introduced into the inner cavity 301 of the protective sleeve 300 through the pneumoperitoneum channel to achieve the pneumoperitoneum effect. Gas is also introduced into the instrument channel 201 through the airtight channel 202. The airtight channel 202 communicates with the distal end of the instrument channel 201 and forms an air outlet 204 facing the proximal end of the instrument channel 201 to inject gas into the instrument channel 201 and form a gas barrier to prevent the internal gas from leaking from the distal end of the instrument channel 201, realizing a valve - less structure. That is, the instrument channel 201 of the valve - less device 22 can ensure airtightness without adding additional seals.
[0041] The smoke exhaust channel 203 is formed between the proximal ends of the airtight channel 202 and the instrument channel 201 and communicates with the instrument channel 201. During the operation, the water vapor and smoke generated are successively refluxed to the filtering component 100 through the proximal end of the instrument channel 201 and the smoke exhaust channel 203 for filtration, ensuring that the smoke generated during the operation can be timely removed and preventing harmful substances from being discharged. The airtight channel 202 replenishes gas in real - time, thereby maintaining a stable abdominal pressure and ensuring the continuous progress of the operation.
[0042] Specifically, in this embodiment, the airtight channel 202 and the smoke exhaust channel 203 are respectively connected to the intake end and the outlet end of the booster pump of the pneumoperitoneum machine through the filtering component 100. In this way, the smoke - containing gas discharged from the smoke exhaust channel 203 enters the booster pump after being filtered by the filtering component 100 and is then injected from the airtight channel 202 after being pressurized by the booster pump, realizing circulation. In this way, it better ensures that the gas is not discharged. Of course, in other embodiments, it is not limited to this. It can also be that the smoke - containing gas discharged from the smoke exhaust channel 203 is collected after being filtered by the filtering component 100, and the pneumoperitoneum machine injects new gas into the airtight channel 202, etc.
[0043] The valve - less device 22 includes a puncture sheath 221, a wind - guiding seat 222, a flow - guiding lower cover 223, and a flow - guiding upper cover 224. The wind - guiding seat 222, the flow - guiding lower cover 223, and the flow - guiding upper cover 224 are successively assembled in the puncture sheath 221 and jointly form the instrument channel 201. The puncture sheath 221, the wind - guiding seat 222, and the flow - guiding lower cover 223 jointly enclose to form the smoke exhaust channel 203, and the puncture sheath 221, the flow - guiding lower cover 223, and the flow - guiding upper cover 224 jointly enclose to form the airtight channel 202. Specifically, both the airtight channel 202 and the smoke exhaust channel 203 are annular channels, distributed on the outer periphery of the instrument channel 201, and the airtight channel 202 is located above the smoke exhaust channel 203.
[0044] The lower diversion cover 223 has a central hole, and the upper diversion cover 224 has a guiding cylinder section 226. The guiding cylinder section 226 is inserted into the central hole of the lower diversion cover 223. The central channel of the guiding cylinder section 226 of the upper diversion cover 224 is part of the instrument channel 201. An airtight channel 202 is formed between the inner wall of the guiding cylinder section 226 and the central hole of the lower diversion cover 223, and the airtight channel 202 communicates with an air outlet 204 at the distal end of the instrument channel 201. As Figure 4 , Figure 5 shown, the inner wall of the central hole of the lower diversion cover 223 has a downwardly curved section 225, and the guiding cylinder section 226 is inserted into the inner side of the curved section 225. In this way, the air outlet 204 forms an annular structure, and the diameter of the air outlet 204 gradually decreases; when gas is blown into the instrument channel 201 from the airtight channel 202, as the diameter of the air outlet 204 gradually decreases, the pressure of the air flow gradually increases, so that the flow rate of the gas blown out from the air outlet 204 increases, and a better gas barrier is formed. At the same time, for the annular air outlet 204, the air flow can be blown into the instrument channel 201 from the outer peripheral side 360° of the instrument channel 201, and the formed gas barrier is more comprehensive.
[0045] The air guiding seat 222 includes a funnel-shaped outer seat body 227 and a plurality of diversion vanes 228 spaced apart on the inner wall of the outer seat body 227. The funnel-shaped outer seat body 227, that is, the outer seat body 227 has an inverted conical structure, and the diameter of its upper opening is larger than that of its lower opening; the plurality of diversion vanes 228 are vertically spaced apart, dividing the inner cavity of the outer seat body 227 into a plurality of diversion chambers; the central channels of the plurality of diversion vanes 228 are part of the instrument channel 201; the lower diversion cover 223 covers the upper opening of the outer seat body 227 and covers the diversion vanes 228, and the upper opening end of the outer seat body 227 is lower than the diversion vanes 228 to form an opening communicating with the smoke exhaust channel 203. The waste gas generated in the protective sleeve 300 flows into the air guiding seat 222 from the proximal end of the instrument channel 201. Since there is a gas barrier output from the airtight channel 202 directly above the air guiding seat 222, the waste gas can only flow into the smoke exhaust channel 203 through the diversion of each diversion vane 228 and is finally discharged from the smoke exhaust channel 203.
[0046] Further, in order to ensure air leakage in the case where an effective gas barrier is not achieved, in this embodiment, a pluggable activation rod assembly is provided on the instrument channel 201 of the valve-less device 22; when the activation rod assembly is inserted into the instrument channel 201, it can effectively block the instrument channel 201, and when the airtight channel 202 can stably output air flow, the activation rod assembly is then pulled out.
[0047] More specifically, a plurality of valved devices 23 are further assembled on the sealing body 21. The valved devices 23 have instrument channels 231 and seals assembled on the instrument channels 231; the plurality of valved devices 23 are only used for inserting instruments. The surface of the sealing body 21 is an arc surface 211; so that the instrument channels 201 of the valve-less device 22 and the instrument channels 231 of the valved devices 23 are both at a certain inclination angle, enabling the instrument to enter the abdominal cavity at a larger angle, avoiding the chopstick effect, thereby reducing the size of the patient's abdominal incision and reducing the patient's pain.
[0048] Further preferably, the valve-less device 22 and / or the valved devices 23 are detachably assembled on the sealing body 21. In this way, after being removed, other instruments can be used or tissues can be taken out.
[0049] The above structural design of the valve-less device 22 is one of the more preferred solutions. Of course, in other embodiments, the structure of the valve-less device 22 is not limited to this. For example, the airtight channel 202 or the smoke exhaust channel 203 may not be arranged in an annular structure surrounding the mechanical channel 201. The air outlet 204 of the airtight channel 202 may not adopt a complete annular structure. For example, the air outlet 204 is a structure of a plurality of arcs and is evenly distributed on the outer peripheral side of the instrument channel 201; the caliber of the air outlet 204 may not adopt a gradually decreasing structure; the air guiding seat 222 may not adopt the structure of the guiding vanes 208, and so on.
[0050] Three independent channels are formed in the filter assembly 100, namely a first filter channel, a second filter channel, and a third filter channel; the filter assembly 100 and the valve-less device 22 are connected by a connecting pipe 11. The connecting pipe 11 has independent first and second channels. The first channel communicates the airtight channel 202 with the first filter channel of the filter assembly 100, and the second channel communicates the smoke exhaust channel 203 with the second filter channel of the filter assembly 100; in this way, the connection between the filter assembly 100 and the valve-less device 22 is realized. The first filter channel, the second filter channel, and the third filter channel of the filter assembly 100 are all channel structures that can filter gas to filter out particulate matters such as smoke and dust.
[0051] The third filter channel of the filter assembly 100 communicates with the pneumoperitoneum channel. Specifically, a tearable tube 12 is further connected to the outside of the connecting pipe 11. The head end of the tearable tube 12 is connected to the filter assembly 100. An air inlet interface is assembled on the protective sleeve 300, that is, an air inlet pipe 331 is connected to the protective sleeve 300, and the end of the air inlet pipe 331 is connected to a two-way valve 34, and the two-way valve 34 forms the air inlet interface. The end of the tearable tube 12 is connected to the two-way valve 34; the communication channel between the air inlet pipe 331 and the tearable tube 12 constitutes the pneumoperitoneum channel.
[0052] The protective sheath 300 includes an inner protective film 31 and an outer protective film 32. The outer protective film 32 is disposed on the outer layer of the inner protective film 31 and forms an annular air cavity 302. A trachea 33, specifically the above-mentioned intake pipe 331, is connected to the distal end of the outer protective film 32. One or more openings 311 are provided on the inner protective film 31. In this embodiment, a plurality of openings 311 are provided on the inner protective film 31 and are evenly distributed along the outer periphery of the inner cavity 301 of the protective sheath 300 to achieve uniform air intake. During the operation, the proximal end of the protective sheath 300 extends into the abdominal cavity, and the intake pipe 331 is connected to the distal end of the outer protective film 32, avoiding the external intake pipe 331 from also extending into the abdominal cavity and causing non-conformity with the skin, which affects the surgical effect.
[0053] Embodiment Two
[0054] A valve-less single-port that can maintain a stable abdominal pressure provided in this embodiment is substantially the same as the structure of the valve-less single-port that can maintain a stable abdominal pressure provided in Embodiment One. The difference lies in: Referring to Figure 7 As shown, in this embodiment, a branch pipe 13 is further externally connected to the connecting pipe 11, and the branch pipe 13 communicates with the second channel; a first smoke exhaust interface 24 is further provided on the sealing main body 21, and the end of the branch pipe 13 is connected to the first smoke exhaust interface 24. With this arrangement, the smoke and waste gas generated during the operation can not only be discharged from the smoke exhaust channel 203 of the valve-less device 22, but also be discharged from the first smoke exhaust interface 24 on the protective sheath 300; enhancing the smoke exhaust effect.
[0055] Embodiment Three
[0056] A valve-less single-port that can maintain a stable abdominal pressure provided in this embodiment is substantially the same as the structure of the valve-less single-port that can maintain a stable abdominal pressure provided in Embodiment Two. The difference lies in: An air intake interface is further provided on the sealing main body 21, and a second smoke exhaust interface is provided on the protective sheath 300, that is, the trachea 33 connected to the distal end of the protective sheath 300 is a smoke exhaust pipe, and the end of the smoke exhaust pipe is connected to the second smoke exhaust interface; the branch pipe 13 is connected to the second smoke exhaust interface, and the tearable pipe 12 is connected to the air intake interface.
[0057] Through the descriptions of the above various embodiments, the added smoke exhaust interfaces and air intake interfaces in this solution can be arbitrarily set on the sealing main body 21 or the protective sheath 300; for example, both the smoke exhaust interface and the air intake interface are set on the sealing main body 21, or both are set on the protective sheath 300; or one is set on the sealing main body 21 and the other is set on the protective sheath 300; and so on.
[0058] Embodiment Four
[0059] A valve-less single-port that can maintain a stable abdominal pressure provided in this embodiment is substantially the same as the structure of the valve-less single-port that can maintain a stable abdominal pressure provided in Embodiment One. The difference lies in: Referring toFigure 8 As shown, the protective sleeve 300 does not adopt the structure of inner and outer membranes. The proximal end of the protective sleeve 300 is connected with a hollow insertion ring 35. A plurality of air ports communicating with the inner cavity 301 are formed on the insertion ring 35. The trachea 33 is directly communicated with the insertion ring 35, and then is communicated with the inner cavity 301 through the air ports on the insertion ring 35.
[0060] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, those skilled in the art should understand that various changes can be made to the present invention in terms of form and details without departing from the spirit and scope of the present invention defined by the appended claims, and all of them are within the protection scope of the present invention.
Claims
1. A valveless single hole capable of maintaining stable abdominal pressure, characterized in that: The invention comprises a filter assembly, a protective sleeve and a sealing body assembly, wherein the sealing body assembly comprises a sealing body sealedly assembled at the distal end of the protective sleeve and a valveless device assembled on the sealing body, wherein the valveless device has an airtight channel, a smoke exhaust channel and an instrument channel; the proximal end of the instrument channel is connected to the inner cavity of the protective sleeve; the airtight channel is connected to the distal end of the instrument channel and forms an air outlet toward the proximal end of the instrument channel; the smoke exhaust channel is formed between the airtight channel and the proximal end of the instrument channel and is connected to the instrument channel; The airtight channel and the smoke exhaust channel of the valveless device are respectively connected to the filter assembly; the filter assembly is connected to the protective sleeve or the sealing body through the pneumoperitoneum channel to inject gas into the protective sleeve.
2. The valveless single hole capable of maintaining stable abdominal pressure according to claim 1, characterized in that: The airtight channel of the valveless device is an annular channel surrounding the outer periphery of the instrument channel, and the air outlet is arranged around the outer periphery of the instrument channel; the air outlet at the far end of the airtight channel connected to the instrument channel is an air outlet with a gradually decreasing diameter.
3. The valveless single hole capable of maintaining stable abdominal pressure according to claim 1, characterized in that: The valveless device includes a puncture sheath, an air guide seat, a flow guide lower cover and a flow guide upper cover, wherein the air guide seat, the flow guide lower cover and the flow guide upper cover are sequentially assembled in the puncture sheath and together constitute the instrument channel; the puncture sheath, the air guide seat and the flow guide lower cover together enclose the smoke exhaust channel, and the puncture sheath, the flow guide lower cover and the flow guide upper cover together enclose the airtight channel.
4. The valveless single hole capable of maintaining stable abdominal pressure according to claim 3, characterized in that: The air guide seat includes a funnel-shaped outer seat body and a plurality of guide plates spaced apart on the inner wall of the outer seat body. The guide lower cover covers the upper opening of the outer seat body and the guide plates. The upper opening end of the outer seat body is lower than the guide plates to form an opening connected to the smoke exhaust channel.
5. The valveless single hole capable of maintaining stable abdominal pressure according to claim 3, characterized in that: The guide lower cover has a center hole, and the guide upper cover has a guide cylinder section, which is inserted into the center hole of the guide lower cover. The center channel of the guide cylinder section of the guide upper cover constitutes a part of the instrument channel, and the airtight channel formed between the guide cylinder section and the inner wall of the center hole of the guide lower cover is connected to the air outlet at the far end of the instrument channel.
6. The valveless single hole capable of maintaining stable abdominal pressure according to claim 1, characterized in that: Three independent channels are formed in the filter assembly, namely, a first filter channel, a second filter channel and a third filter channel; the filter assembly and the valveless device are connected via a connecting pipe, the connecting pipe has a first channel and a second channel that are independent of each other, the first channel connects the airtight channel and the first filter channel of the filter assembly, and the second channel connects the smoke exhaust channel and the second filter channel of the filter assembly; The third filter channel of the filter component is connected to the pneumoperitoneum channel.
7. The valveless single hole capable of maintaining stable abdominal pressure according to claim 6, characterized in that: The outside of the connecting tube is also connected to a tearable tube, the head end of the tearable tube is connected to the filter assembly, the protective cover is equipped with an air inlet interface, the protective cover is connected to an air inlet pipe, the end of the air inlet pipe is connected to a two-way valve, and the two-way valve forms the air inlet interface; the end of the tearable tube is connected to the two-way valve; the connecting channel between the air inlet pipe and the tearable tube constitutes the pneumoperitoneum channel.
8. The valveless single hole capable of maintaining stable abdominal pressure according to claim 6, characterized in that: The connecting pipe is also externally connected to a branch pipe, and the branch pipe is connected to the second channel; the sealing body or the protective sleeve is also provided with a smoke exhaust interface, and the end of the branch pipe is connected to the smoke exhaust interface.
9. The valveless single hole capable of maintaining stable abdominal pressure according to claim 1, characterized in that: The protective sleeve comprises an inner protective film and an outer protective film. The outer protective film is arranged on the outer layer of the inner protective film and forms an annular air cavity. The distal end of the outer protective film is connected to the trachea. The inner protective film is provided with one or more openings.
10. The valveless single hole capable of maintaining stable abdominal pressure according to claim 1, characterized in that: The surface of the sealing body is an arc-shaped surface; the sealing body is also equipped with a plurality of valve devices, each of which has an instrument channel and a sealing member assembled on the instrument channel; the valveless device and / or the valve device are detachably assembled on the sealing body.