Turbulent flow puncture cannula structure of puncture outfit and puncture outfit

Abstract

The invention discloses a puncture cannula structure of a puncture outfit, in particular to a turbulent flow puncture cannula structure of the puncture outfit and the puncture outfit, the puncture cannula is provided with an air inlet and a smoke outlet, and the air inlet and the smoke outlet are distributed in opposite directions in the radial direction of the puncture cannula and in a staggered mode in the axial direction of the puncture cannula. The sectional area A of the air inlet is larger than the sectional area A of the smoke outlet. The technical problem that the smoke removal efficiency is improved to the maximum extent on the premise that stable abdominal pressure is maintained through flow field control in the laparoscopic surgery is solved. In a laparoscopic surgery, a puncture outfit combined with the turbulent flow puncture cannula structure can enable a flow field in an abdominal cavity to be in a non-stable state and can generate turbulent flow, vortex or periodic fluctuation in the flow field on the premise that stable abdominal cavity pressure is maintained through flow field control, so that the mixing effect is enhanced; and the smoke in the abdominal cavity can be mixed with the gas more quickly, so that the smoke can be discharged more easily.

Description

Technical Field

[0001] The present invention relates to a puncture cannula structure of a trocar, in particular to a turbulent flow puncture cannula structure of a trocar. At the same time, the present invention also provides a trocar incorporating the above-mentioned turbulent flow puncture cannula structure. Background Art

[0002] In laparoscopic surgery, the insufflator and the trocar are used in combination in the following way: the insufflator continuously delivers CO through the gas inlet of the puncture cannula 2 to establish pneumoperitoneum. At the same time, the smoke in the abdominal cavity is mixed with the gas and discharged through the smoke exhaust port of the puncture cannula to maintain a stable abdominal pressure, usually 12 - 15 mmHg, to ensure a clear surgical field.

[0003] However, the existing design of the puncture cannula structure of the trocar still has technical defects: the size and position design of the gas inlet and the smoke exhaust port of the puncture cannula are only for simply ensuring the stability of the pneumoperitoneum flow field, and thus ensuring a constant abdominal pressure. However, under a stable flow field, the parameters such as the velocity and pressure of the pneumoperitoneum flow field do not change, and the smoke exhaust efficiency is relatively low, and local accumulation of smoke is likely to occur. That is, without maintaining a stable abdominal pressure through flow field control, the smoke exhaust efficiency is maximized.

[0004] Therefore, the applicant has proposed the present invention. Summary of the Invention

[0005] The purpose of the present invention is to provide a turbulent flow puncture cannula structure of a trocar to solve the above-mentioned deficiencies of the existing technology. In laparoscopic surgery, it can maximize the smoke exhaust efficiency while maintaining a stable abdominal pressure through flow field control.

[0006] To achieve the above purpose, a turbulent flow puncture cannula structure of a trocar designed by the present invention includes a puncture cannula. The puncture cannula is provided with a gas inlet and a smoke exhaust port, and is located at the front end of the puncture cannula in the puncture direction of the trocar. The gas inlet and the smoke exhaust port of the puncture cannula are opposite to each other in the radial direction of the puncture cannula and are staggered from each other in the axial direction of the puncture cannula. And the cross-sectional area A of the gas inlet 进气口 > the cross-sectional area A of the smoke exhaust port 排烟口 .

[0007] During laparoscopic surgery, the trocar combined with the turbulent flow puncture cannula structure of the present invention, due to the size and position design of the air inlet and smoke exhaust port of the puncture cannula in its structure, on the one hand, it can maintain a stable abdominal cavity pressure through flow field control, and at the same time make the flow field in the abdominal cavity in an unstable state. The unstable flow field usually shows instantaneous changes in parameters such as velocity and pressure, and can generate turbulence, eddies or periodic fluctuations, thereby enhancing the mixing effect, making the smoke in the abdominal cavity mix with the gas faster, and thus being more easily discharged. At the same time, the turbulence or eddies can break the local aggregation of the smoke, reduce the dead zone, and improve the exhaust efficiency. On the other hand, it extends the path of the air flow in and out of the abdominal cavity flow field as much as possible, drives a higher proportion of gas renewal, is conducive to the adsorption of local smoke, and also improves the smoke exhaust efficiency. That is, the present invention can maintain a stable abdominal cavity pressure through flow field control and at the same time maximize the smoke exhaust efficiency.

[0008] For the turbulent flow puncture cannula structure of the above-mentioned trocar, the specific structure of the puncture cannula in its structure is preferably selected to include: an inner tube and an outer tube with a coaxial structure, and a sealing structure is provided between the two to form an air inlet chamber and a smoke exhaust chamber; The air inlet is opened on the outer tube wall on the side where the air inlet chamber is located and is in communication with the air inlet chamber; the smoke exhaust port is opened on the outer tube wall on the other side where the smoke exhaust chamber is located and is in communication with the smoke exhaust chamber.

[0009] Compared with the air inlet chamber and smoke exhaust chamber with an inner and outer ring structure layout in the traditional puncture cannula, the turbulent flow puncture cannula structure of the present invention has a simpler design and is more convenient for opening the air inlet and smoke exhaust ports on the puncture cannula.

[0010] For the turbulent flow puncture cannula structure of the above-mentioned trocar, the air inlet and smoke exhaust ports on the outer tube are further preferably linear reaming structures from the inner surface of the tube wall to the outer surface of the tube wall, so that the flow rate of the gas flowing through the air inlet into the abdominal cavity decreases, while the flow rate of the mixed smoke and gas in the abdominal cavity flowing through the smoke exhaust port out of the abdominal cavity increases conversely. Furthermore, it is more conducive to maintaining a stable abdominal cavity pressure through flow field control during laparoscopic surgery and making the flow field in the abdominal cavity in an unstable state.

[0011] For the turbulent flow puncture cannula structure of the above-mentioned trocar, the air inlet chamber and the smoke exhaust chamber are further preferably symmetrically distributed; The sealing structure is further preferably: a pair of first ribs symmetrically distributed on the outer surface of the inner tube wall, each first rib is provided with a groove and extends in the axial direction of the inner tube, and a pair of second ribs symmetrically distributed on the inner surface of the outer tube wall, and a sealing surface is formed by being embedded into its corresponding groove one by one.

[0012] Finally, to facilitate the connection of the pneumoperitoneum pipeline between the pneumoperitoneum machine and the trocar, as a preferred technical solution, the present invention provides a turbulent flow puncture cannula structure for a trocar. In this structure, the outer tube is provided with an air inlet interface and a smoke exhaust interface having a coaxial structure, which are located at the rear end of the outer tube in the puncture direction of the trocar; the air inlet interface communicates with the air inlet chamber, and the smoke exhaust interface communicates with the smoke exhaust chamber; A quick connector is provided on the outer side of the outer tube. The quick connector is provided with two pneumoperitoneum tube connectors having a coaxial structure. The quick connector and the outer tube are installed in a quickly detachable manner, and the two pneumoperitoneum tube connectors of the quick connector are hermetically docked with the air inlet interface and the smoke exhaust interface one by one.

[0013] In the above preferred technical solution, the two pneumoperitoneum tube connectors of the quick connector have a coaxial structure. When used in conjunction with coaxial and different-diameter pneumoperitoneum tubes, the number of gas paths between the pneumoperitoneum machine and the trocar can be reduced, thereby effectively simplifying the gas path.

[0014] In addition, the present invention also provides a trocar, the structure of which includes a turbulent flow puncture cannula structure of a trocar as described above.

[0015] Compared with the prior art, the turbulent flow puncture cannula structure of a trocar and a trocar obtained by the present invention have the following technical advantages: In laparoscopic surgery, for the trocar combined with the turbulent flow puncture cannula structure of the present invention, due to the design of the sizes and positions of the air inlet and smoke exhaust ports of the puncture cannula in its structure, on the one hand, on the premise of maintaining a stable abdominal cavity pressure through flow field control, the flow field in the abdominal cavity is in an unstable state. The unstable flow field usually shows instantaneous changes in parameters such as velocity and pressure, and can generate turbulence, eddy currents or periodic fluctuations, thereby enhancing the mixing effect, making the smoke in the abdominal cavity mix with the gas faster and thus being more easily discharged. At the same time, the turbulence or eddy currents can break the local aggregation of the smoke, reduce the dead zone and improve the exhaust efficiency. On the other hand, the path of the air flow entering and exiting the abdominal cavity flow field is extended as much as possible, driving a higher proportion of gas renewal, which is conducive to the adsorption of local smoke and also improves the smoke exhaust efficiency. That is, the present invention can maximize the smoke exhaust efficiency on the premise of maintaining a stable abdominal cavity pressure through flow field control.

[0016] In laparoscopic surgery, the trocar combined with the turbulent flow puncture cannula structure of the present invention can not only facilitate the connection of the pneumoperitoneum pipeline between the pneumoperitoneum machine and the trocar, but also reduce the number of gas paths between the pneumoperitoneum machine and the trocar, thereby effectively simplifying the gas path.

[0017] Compared with the inner and outer ring structure layouts of the air inlet chamber and the smoke exhaust chamber in the traditional puncture cannula, the turbulent flow puncture cannula structure of the present invention is designed more simply and reasonably, and is more convenient for opening the air inlet and smoke exhaust ports on the puncture cannula. Brief Description of the Drawings

[0018] Figure 1 is a schematic structural view of a turbulence - piercing cannula of a trocar (the quick - connector is hidden in this figure); Figure 2 is Figure 1 a partial enlarged view of the position A in Figure 3 is a schematic structural view of a turbulence - piercing cannula of a trocar; Figure 4 is Figure 3 a top - view schematic of the structure of a turbulence - piercing cannula of a trocar shown in Figure 5 is Figure 4 a sectional view taken along the line a - a in Figure 6 is Figure 5 a partial enlarged view of the position B in Figure 7 is Figure 4 a sectional view taken along the line b - b in Figure 8 is a schematic structural view of a trocar; Figure 9 is a partial schematic of the structure of a turbulence - piercing cannula of another trocar.

[0019] In the figure: trocar cannula 1, inner tube 1 - 1, outer tube 1 - 2, air inlet 1 - 2 - 1, smoke exhaust port 1 - 2 - 2, air inlet interface 1 - 2 - 3, smoke exhaust interface 1 - 2 - 4, air inlet chamber 1 - 3, smoke exhaust chamber 1 - 4, first rib 1 - 5, groove 1 - 5 - 1, second rib 1 - 6, quick - connector 2, pneumoperitoneum tube connector 2 - 1. Detailed Embodiments

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present invention.

[0021] As Figure 1-7 shown, as an embodiment of the present invention, the turbulence - piercing cannula structure of a trocar provided in this embodiment includes a trocar cannula 1. The trocar cannula 1 is provided with an air inlet 1 - 2 - 1 and a smoke exhaust port 1 - 2 - 2, and is located at the front end of the trocar cannula 1 in the piercing direction of the trocar. The air inlet 1 - 2 - 1 and the smoke exhaust port 1 - 2 - 2 of the trocar cannula 1 are opposite to each other in the radial direction of the trocar cannula 1 and are staggeredly distributed in the axial direction of the trocar cannula 1. And the cross - sectional area A of the air inlet 1 - 2 - 1进气口 > the cross-sectional area A of the smoke exhaust port 1-2-2 排烟口 。

[0022] In this embodiment, the specific structure of the puncture cannula 1 includes an inner tube 1-1 and an outer tube 1-2 with a coaxial structure, and a sealing structure is provided between the two to form an air inlet chamber 1-3 and a smoke exhaust chamber 1-4. The air inlet chamber 1-3 and the smoke exhaust chamber 1-4 are symmetrically distributed; the air inlet 1-2-1 is opened on the outer wall of the outer tube 1-2 on the side where the air inlet chamber 1-3 is located and communicates with the air inlet chamber 1-3; the smoke exhaust port 1-2-2 is opened on the outer wall of the outer tube 1-2 on the other side where the smoke exhaust chamber 1-4 is located and communicates with the smoke exhaust chamber 1-4.

[0023] The sealing structure is specifically as follows: a pair of first ribs 1-5 are symmetrically arranged on the outer surface of the inner tube 1-1 wall. Each first rib 1-5 is provided with a groove 1-5-1 and extends in the axial direction of the inner tube 1-1. A pair of second ribs 1-6 are symmetrically arranged on the inner surface of the outer tube 1-2 wall, and a sealing surface is formed by being embedded into its corresponding groove 1-5-1 one by one.

[0024] Compared with the air inlet chamber 1-3 and the smoke exhaust chamber 1-4 with an inner and outer ring structure layout in the traditional puncture cannula 1, the structure design of the turbulent flow puncture cannula 1 of the present invention is simpler, and it is more convenient to open the air inlet 1-2-1 and the smoke exhaust port 1-2-2 on the puncture cannula 1.

[0025] At the same time, in order to facilitate the connection of the pneumoperitoneum pipeline between the pneumoperitoneum machine and the puncture device, the outer tube 1-2 in this embodiment is provided with an air inlet interface 1-2-3 and a smoke exhaust interface 1-2-4 with a coaxial structure, which are located at the rear end of the outer tube 1-2 in the puncture direction of the puncture device; the air inlet interface 1-2-3 communicates with the air inlet chamber 1-3, and the smoke exhaust interface 1-2-4 communicates with the smoke exhaust chamber 1-4; And, a quick connector 2 is provided on the outside of the outer tube 1-2. The quick connector 2 is provided with two pneumoperitoneum tube connectors 2-1 with a coaxial structure. The quick connector 2 and the outer tube 1-2 are installed in a quickly detachable manner, and the two pneumoperitoneum tube connectors 2-1 of the quick connector 2 are hermetically docked with the air inlet interface 1-2-3 and the smoke exhaust interface 1-2-4 one by one.

[0026] In this embodiment, the two pneumoperitoneum tube connectors 2-1 of the quick connector 2 have a coaxial structure. By using coaxial and different-diameter pneumoperitoneum tubes, the number of gas paths between the pneumoperitoneum machine and the puncture device can be reduced, and thus the gas path can be effectively simplified.

[0027] In addition, as Figure 8As shown, in this embodiment, a trocar is further provided, and its structure includes a flow-disturbing puncture cannula structure of a trocar with the above-described structure.

[0028] As Figure 9 shown, as the second implementation manner of the present invention, a flow-disturbing puncture cannula structure of a trocar provided in this embodiment, and a trocar, whose general structure is consistent with the aforementioned first implementation manner. However, in this embodiment, the air inlet 1-2-1 and the smoke exhaust port 1-2-2 on the outer tube 1-2 are both linear reaming structures from the inner surface of the tube wall to the outer surface of the tube wall, so that the flow rate of the gas entering the abdominal cavity through the air inlet 1-2-1 is reduced, while the flow rate of the mixed smoke and gas in the abdominal cavity flowing out of the abdominal cavity through the smoke exhaust port 1-2-2 increases conversely. Furthermore, it is more conducive to making the flow field in the abdominal cavity in an unstable state on the premise of maintaining a stable abdominal cavity pressure through flow field control during laparoscopic surgery.

[0029] During laparoscopic surgery, for the trocar combined with the flow-disturbing puncture cannula 1 structure of the present invention, due to the design of the size and position of the air inlet 1-2-1 and the smoke exhaust port 1-2-2 of the puncture cannula 1 in its structure, on the one hand, it can make the flow field in the abdominal cavity in an unstable state on the premise of maintaining a stable abdominal cavity pressure through flow field control. The unstable flow field usually shows instantaneous changes in parameters such as velocity and pressure, and can generate turbulence, eddy currents or periodic fluctuations, thereby enhancing the mixing effect, making the smoke in the abdominal cavity mix with the gas faster and thus being more easily discharged. At the same time, the turbulence or eddy currents can break the local aggregation of the smoke, reduce the dead zone and improve the exhaust efficiency. On the other hand, it makes the path of the air flow in and out of the abdominal cavity flow field as long as possible, drives a higher proportion of gas renewal, is conducive to the adsorption of local smoke, and also improves the smoke exhaust efficiency. That is, the present invention can maximize the smoke exhaust efficiency on the premise of maintaining a stable abdominal cavity pressure through flow field control.

[0030] The present invention is not limited to the above best implementation manner. Anyone can obtain other various forms of products under the inspiration of the present invention. However, no matter what changes are made in its shape or structure, as long as it has a technical solution identical or similar to that of the present application, it falls within the protection scope of the present invention.

Claims

1. A puncture tube structure of a puncture device, comprising a puncture tube, wherein the puncture tube is provided with an air inlet and a smoke exhaust port, and is located at the front end of the puncture tube in the puncture direction of the puncture device, characterized in that: The air inlet and the smoke outlet of the puncture sleeve are opposite to each other in the radial direction of the puncture sleeve and are staggered in the axial direction of the puncture sleeve, and the cross-sectional area A of the air inlet is 进气口 > Cross-sectional area A of smoke exhaust port 排烟口 .

2. The flow-disturbing puncture sleeve structure of a puncture device according to claim 1, characterized in that The specific structure of the puncture cannula includes: an inner tube and an outer tube of a coaxial structure, and a sealing structure is added between the two to form an air intake chamber and a smoke exhaust chamber; The air inlet is formed on the outer tube wall at one side of the air inlet chamber and is interconnected with the air inlet chamber; the smoke exhaust port is formed on the outer tube wall at the other side of the smoke exhaust chamber and is interconnected with the smoke exhaust chamber.

3. The flow-disturbing puncture sleeve structure of a puncture device according to claim 2, characterized in that: The air inlet and smoke exhaust port on the outer tube both form a linear expansion structure from the inner surface of the tube wall to the outer surface of the tube wall.

4. The flow-disturbing puncture sleeve structure of a puncture device according to claim 2 or 3, characterized in that: The air intake chamber and the smoke exhaust chamber are symmetrically distributed with each other; The sealing structure is specifically as follows: a pair of symmetrically distributed first ribs are provided on the outer surface of the inner tube wall, each first rib is provided with a groove, and both extend in the axial direction of the inner tube; a pair of symmetrically distributed second ribs are provided on the inner surface of the outer tube wall, and are embedded one by one into their corresponding grooves to form a sealing surface.

5. The flow-disturbing puncture sleeve structure of a puncture device according to claim 2 or 3, characterized in that: The outer tube is provided with an air intake interface and a smoke exhaust interface of a coaxial structure, which are located at the rear end of the outer tube in the puncture direction of the puncture device; the air intake interface and the air intake chamber are interconnected, and the smoke exhaust interface and the smoke exhaust chamber are interconnected; A quick connector is provided on the outside of the outer tube, and the quick connector is provided with two pneumoperitoneum tube connectors of a coaxial structure. The quick connector and the outer tube are installed in a quickly detachable manner, and the two pneumoperitoneum tube connectors of the quick connector are sealed and connected to the air inlet interface and the smoke exhaust interface one by one.

6. The flow-disturbing puncture sleeve structure of a puncture device according to claim 4, characterized in that: The outer tube is provided with an air intake interface and a smoke exhaust interface of a coaxial structure, which are located at the rear end of the outer tube in the puncture direction of the puncture device; the air intake interface and the air intake chamber are interconnected, and the smoke exhaust interface and the smoke exhaust chamber are interconnected; A quick connector is provided on the outside of the outer tube, and the quick connector is provided with two pneumoperitoneum tube connectors of a coaxial structure. The quick connector and the outer tube are installed in a quickly detachable manner, and the two pneumoperitoneum tube connectors of the quick connector are sealed and connected to the air inlet interface and the smoke exhaust interface one by one.

7. A trocar, characterized in that include: A flow-disturbing puncture sleeve structure of a puncture device as described in claim 1 above.

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