CN110960293A

CN110960293A - Puncture cannula

Info

Publication number: CN110960293A
Application number: CN201811153575.1A
Authority: CN
Inventors: 孙宝峰; 黄晔
Original assignee: Jiangsu Fengh Medical Equipment Co Ltd
Current assignee: Jiangsu Fengh Medical Equipment Co Ltd
Priority date: 2018-09-29
Filing date: 2018-09-29
Publication date: 2020-04-07
Anticipated expiration: 2038-09-29
Also published as: CN110960293B

Abstract

The invention discloses a puncture cannula which comprises a cannula assembly and a gas injection assembly, wherein the cannula assembly comprises a gas passage, the gas passage comprises a gas inlet, the gas injection assembly comprises a gas injection passage, and the gas injection passage comprises a gas outlet; the gas injection assembly is rotatable in the sleeve assembly to selectively communicate the gas injection channel with the vent channel; the vent passage further comprises a gasket; when the gas injection channel is communicated with the ventilation channel, the gas outlet of the gas injection channel is communicated with the gas inlet of the ventilation channel, and the sealing gasket is positioned between the gas outlet and the gas inlet; when the gas injection channel is not communicated with the ventilation channel, the gas outlet of the gas injection channel is separated from the gas inlet of the ventilation channel, and the sealing gasket is positioned between the outer wall of the gas injection assembly and the gas inlet. According to the invention, the sealing gasket is arranged on the sleeve pipe assembly or the gas injection assembly, when the gas injection channel is not communicated with the ventilation channel, the wall surface of the gas injection assembly is mutually attached to the sealing gasket so as to seal the ventilation channel, thus ensuring the sealing property of the puncture sleeve and being beneficial to maintaining the stability of pneumoperitoneum.

Description

Puncture cannula

Technical Field

The invention relates to a surgical instrument, in particular to a puncture cannula, and belongs to the field of medical equipment.

Background

The puncture outfit is a surgical instrument for establishing an access into the abdominal cavity, and comprises a puncture core and a puncture cannula. In a specific operation process, a doctor generally opens a small opening on the abdomen of a patient, and then moves a puncture core of the puncture outfit downwards while aligning the puncture core with the small opening to rotate in a reciprocating manner, so that one end of a puncture cannula is driven to enter the abdominal cavity of the patient, after the puncture is completed, the puncture core is pulled out of the puncture cannula, and the puncture cannula forms a passage for other surgical instruments to enter and exit. In order to enlarge the space of the abdominal cavity, the distance between each tissue is increased, thereby being more beneficial to the operation, after the puncture is completed, the gas is injected into the abdominal cavity through the channel formed by the puncture sleeve, therefore, a gas injection assembly can be arranged on the sleeve assembly, after the gas injection is finished, the gas injection to the sleeve assembly is closed through adjusting the gas injection assembly, and the puncture sleeve is sealed in the inner part, thereby ensuring the stability of the pneumoperitoneum and facilitating the operation of a doctor.

Among the current puncture sleeve pipe, adopt cock formula gas injection valve to carry out the gas injection to the thimble assembly usually, set up the gas injection subassembly in the thimble assembly, thereby through the switching of rotatory gas injection subassembly in the control thimble assembly passageway of ventilating, there is the hidden danger of gas leakage between gas injection subassembly and the thimble assembly, even consequently when the gas injection valve is closed, also can influence the stability of pneumoperitoneum, and then influence the normal clear of operation.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide a puncture cannula, which solves the problem that the stability of pneumoperitoneum and the normal operation of an operation are influenced by the air leakage of the existing air injection valve.

The invention is realized by the following technical scheme: a puncture cannula comprising a cannula assembly and an insufflation assembly, the cannula assembly comprising a vent channel, the vent channel comprising a gas inlet, the insufflation assembly comprising an insufflation channel, the insufflation channel comprising a gas outlet; the gas injection assembly is at least partially disposed in the sleeve assembly and the gas injection assembly is rotatable in the sleeve assembly to selectively communicate the gas injection channel with the vent channel; the puncture cannula further comprises a sealing gasket;

when the gas injection channel is communicated with the ventilation channel, the gas outlet of the gas injection channel is communicated with the gas inlet of the ventilation channel, and the sealing gasket is positioned between the gas outlet and the gas inlet; when the gas injection channel is not communicated with the ventilation channel, the gas outlet of the gas injection channel is separated from the gas inlet of the ventilation channel, and the sealing gasket is positioned between the outer wall of the gas injection assembly and the gas inlet.

Preferably, the cannula assembly further comprises a receiving member disposed at one end of the vent channel, the receiving member being in communication with the vent channel; the gas injection assembly is at least partially disposed in the receptacle and the gas injection assembly is rotatable in the receptacle.

Preferably, the gas injection assembly comprises a locking piece, the gas injection channel is arranged in the locking piece, and the gas injection channel is a first gas injection channel; the air outlet is positioned on the wall of the locking piece; the lock member includes a rotator.

Preferably, the gas injection assembly further comprises an operating rod, a second gas injection channel is arranged in the operating rod, and the second gas injection channel is communicated with the first gas injection channel; the gas injection channel includes the first gas injection channel and the second gas injection channel.

Preferably, the sleeve assembly comprises a housing; the gas injection assembly further comprises an operating rod, and the operating rod is integrally formed with or connected with the locking piece; the revolving body is accommodated in the accommodating part, and the air outlet is positioned on the wall of the revolving body.

Preferably, the receiving member comprises a body of revolution, or an inner surface of the receiving member comprises a surface of revolution.

Preferably, the gasket is disposed on the sleeve assembly or the gas injection assembly.

Preferably, the gasket is provided at one end of the ventilation passage where the air inlet is located, and the gasket includes a hole communicating with the air inlet.

Preferably, the sealing gasket is attached to the outer wall of the gas injection assembly.

Preferably, the sealing gasket is arranged on the outer wall of the revolving body, and the sealing gasket comprises a hole communicated with the air outlet.

Preferably, the sleeve assembly at the position of the air inlet is attached to the sealing gasket.

Preferably, the accommodating piece comprises a first accommodating part and a second accommodating part, and a first protrusion and a second protrusion are arranged on the upper end surface of the first accommodating part; the gas injection subassembly includes action bars and locking piece, the bottom of action bars is provided with the breach, the breach with first arch with the protruding alternative block of second, the locking piece includes the solid of revolution, second holding portion holding the locking piece.

Preferably, a central angle of a sector formed by the first protrusion, the second protrusion and a center of the upper end surface is 90 °.

Preferably, the upper end surface of the first accommodating part is further provided with a third protrusion, and the third protrusion is arranged symmetrically with the first protrusion; the third protrusion, the second protrusion and the center of the upper end face form a fan-shaped central angle of 90 degrees, and the first protrusion, the second protrusion and the center of the upper end face form a fan-shaped central angle of 90 degrees.

Preferably, the cannula assembly further comprises a cannula housing inner shell and a cannula body, the cannula body is arranged at the bottom of the cannula housing inner shell, the vent channel is located on the wall of the cannula housing inner shell, and the cavity of the cannula housing inner shell is communicated with the inner cavity of the cannula body and the vent channel.

Preferably, the puncture cannula further comprises a cannula cartridge housing, an opening is formed in the cannula cartridge housing, and the cannula assembly partially protrudes out of the cannula cartridge housing.

Compared with the prior art, the invention has the beneficial effects that: the puncture sleeve controls the opening and closing of the gas injection assembly by adjusting the gas injection assembly, so that a gas injection channel in the gas injection assembly is selectively communicated with a ventilation channel in the sleeve assembly. The gas injection subassembly adopts the design similar to the ball valve to be provided with sealed the pad on thimble assembly or gas injection subassembly, gas injection passageway in the gas injection subassembly and the passageway of ventilating when not communicating, the wall of gas injection subassembly laminates with sealed the pad each other, realizes sealed to the passageway of ventilating, guarantees puncture sheathed tube leakproofness, is favorable to maintaining the stability of pneumoperitoneum, guarantees that the operation is gone on normally safely.

Drawings

FIG. 1 is a schematic structural view of a cannula assembly according to an embodiment of the present invention;

FIG. 2 is a schematic view of the interior of the container of FIG. 1;

FIG. 3 is a schematic structural view of a gas injection assembly according to an embodiment of the present invention;

FIG. 4 is a schematic structural view showing an open state of a gas injection assembly according to an embodiment of the present invention;

FIG. 5 is a partial cross-sectional view of FIG. 4 in the axial direction;

FIG. 6 is a schematic structural view showing a closed state of the gas injection assembly according to the embodiment of the present invention;

FIG. 7 is a partial cross-sectional view of FIG. 6 in the axial direction;

FIG. 8 is a schematic structural view of a cannula cartridge housing according to an embodiment of the present invention;

FIG. 9 is a schematic structural view of a puncture cannula according to an embodiment of the present invention.

Reference numerals

10-cannula assembly, 11-vent channel, 12-receiving member, 121-first receiving member, 122-second receiving member, 111-sealing gasket, 1211-first protrusion, 1212-second protrusion, 13-cannula housing inner shell, 14-cannula body,

20-gas injection assembly, 21-gas injection channel, 22-gas injection hole, 23-operating rod, 24-locking piece, 241-first pipe, 242-second pipe, 231-notch, 2421-cushion block,

30-casing housing, 31-opening.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

Referring to fig. 1, 4 and 6, the present embodiment provides a puncture cannula, which includes a cannula assembly 10 and an air injection assembly 20, the cannula assembly 10 includes a cannula housing inner casing 13, a cannula body 14, a vent channel 11 and a receiving member 12, a sealing device is disposed on an upper portion of the cannula housing inner casing 13, a bottom portion of the cannula housing inner casing 13 is connected to the cannula body 14, and structures and connection relationships of the sealing device, the cannula housing inner casing 13 and the cannula body 14 are all the prior art, and therefore, detailed description thereof is omitted here. The vent passage 11 is a hollow tube. One end (i.e., a first end) of the vent passage 11 is connected to the casing bin inner housing 13, and the vent passage 11 communicates with the casing body 14 through the casing bin inner housing 13. The container 12 is provided at the other end of the ventilation passage 11 and communicates with the ventilation passage 11. The ventilation channel 11 extends transversely, the accommodating part 12 extends longitudinally, and the ventilation channel 11 and the accommodating part 12 are arranged vertically. The "longitudinal direction" in this embodiment refers to a direction parallel to the axial direction of the sleeve body 14, and the "lateral direction" refers to a direction perpendicular to the longitudinal direction. The inside of the housing 12 is used for accommodating a part of the gas injection assembly 20, and the other end (i.e. the second end) of the ventilation channel 11 is a gas inlet, and the gas inlet is provided with a sealing gasket 111, as shown in fig. 2, the sealing gasket 111 is circular and has a central axis coinciding with a central axis of the ventilation channel 11. The center of the seal gasket 111 is provided with a center hole, the diameter of the center hole is larger than or equal to the diameter of the air inlet, and the seal gasket 111 is attached to the outer wall of the air injection assembly 20. With continued reference to fig. 1, the container 12 comprises a first container 121 and a second container 122, the first container 121 is a straight tube, the second container 122 is a sphere, and the first container 121 and the second container 122 are axially aligned. Alternatively, the inner surface of the second receiving portion 122 is a surface of revolution. The sleeve body 14, the sleeve bin inner shell 13 and the ventilation channel 11 are communicated in sequence. The upper end surface of first receptacle 121 is provided with a structure for mating with gas injection assembly 20, which is a first protrusion 1211 and a second protrusion 1212, for defining the position of gas injection assembly 20 with respect to tube assembly 10 and facilitating the switching of gas injection assembly 20 between the open and closed states. The central angle of the sector formed by the first protrusion 1211, the second protrusion 1212 and the center of the upper end surface of the first receiving portion 121 (i.e., the pipe orifice) is 90 °, which ensures that the gas injection assembly 20 is in a fully opened or fully closed state in the two states, and reduces the required stroke of the gas injection assembly 20 when the gas injection assembly 20 is in the switched state, thereby facilitating the operation. The first accommodating portion 121 and the second accommodating portion 122 are integrally formed.

Referring to fig. 2, 4 and 6, the gas injection assembly 20 includes an operating rod 23 and a locking member 24, the operating rod 23 and the locking member 24 are disposed at an angle of 30-150 °, and a gas injection channel 21 is opened inside the gas injection assembly 20. Preferably, operative lever 23 and locking member 24 are vertically disposed, locking member 24 extends longitudinally, and operative lever 23 extends transversely to facilitate rotation of operative lever 23 during a surgical procedure. Preferably, the operating lever 23 and the lock member 24 are connected or integrally formed to avoid air leakage from the gas-injection passage 21 at the connection of the operating lever 23 and the lock member 24. The bottom of the operating rod 23 is provided with a notch 231 for alternatively engaging with the first protrusion 1211 and the second protrusion 1212 of the container 12 to define the gas injection assembly 20 in the open or closed state. After the notch 231 on the operating rod 23 is engaged with the second protrusion 1212, the gas injection assembly 20 is in an open state, as shown in fig. 4 and 5; after the notch 231 of the operating rod 23 is engaged with the first protrusion 1211, the gas injection assembly 20 is in a closed state, as shown in fig. 6 and 7. Whereby the selective communication of the gas-injection passage 21 with the vent passage 11 is achieved. When the operating rod 23 is rotated, the notch 231 at the bottom of the operating rod and the first protrusion 1211 or the second protrusion 1212 on the sleeve assembly 10 are pressed against each other, so that the first protrusion 1211 or the second protrusion 1212 enters the notch 231, and the first protrusion 1211 or the second protrusion 1212 is locked with the notch 231 and then positioned, thereby preventing the gas injection assembly 20 from shaking relative to the accommodating member 12. The surfaces of the notch 231 contacting with the first protrusion 1211 and the notch 231 contacting with the second protrusion 1212 are chamfered to facilitate the first protrusion 1211 or the second protrusion 1212 entering into the notch 231 and escaping from the notch 231.

The locking member 24 includes a first pipe 241 and a second pipe 242, the first pipe 241 is a straight pipe, the second pipe 242 is a rotator, and the rotator is preferably a spherical member. The interior of the operating rod 23, the first pipe 241 and the second pipe 242 are sequentially communicated to form the gas injection channel 21, a through hole is opened on the wall of the second pipe 242 to form the gas injection hole 22, and preferably, the central axis of the gas injection hole 22 is parallel to the extending direction of the operating rod 23.

In another embodiment (not shown), the gasket 111 is disposed partially or completely around the outer wall of the second pipe 242, and the gasket 111 is perforated to communicate with the gas injection hole 22. The end of the vent passage 11 is shaped in an arc to match the outer wall shape of the second pipe member 242 to which the gasket 111 is attached, so that the end of the vent passage 11 is fitted with the gasket 111. In this way, when the gas injection assembly is opened, the gasket 111 makes the gas injection hole 22 form a gas-tight connection with the vent channel 11; the gasket 111 seals between the vent passage 11 and the outer wall of the second pipe 242 when the gas injection assembly is closed, preventing the vent passage 11 from leaking gas.

In the gas injection assembly 20, one end of the operating rod 23 forms a gas inlet of the gas injection channel 21, and the wall of the second pipe 242 is provided with a gas injection hole 22 as a gas outlet of the gas injection channel 21. The bottom end of the second tube 242 is open for the manufacturing process. In order to further ensure the sealing effect between the second pipe 242 and the second receiving portion 122, the opening at the bottom end of the second pipe 242 is sealed by the cushion block 2421, and the cushion block 2421 is in interference fit with the second pipe 242 to seal the opening, so that the gas entering the locking member 24 from the operating rod 23 can only be output through the gas injection hole 22 on the second pipe 242, which not only improves the gas injection efficiency when the gas injection assembly is opened, but also enhances the sealing performance when the gas injection assembly is closed.

In fig. 5 and 7, the entirety of the gas injection assembly 20 is cut away, the right half of the housing 12 is cut away, and the gasket 111 is cut away. Second pipe 242 of gas injection assembly 20 is disposed in second receiving portion 122 of tube assembly 10 and is in clearance fit with second receiving portion 122, and first pipe 241 of gas injection assembly 20 is disposed at least partially in first receiving portion 121 and is also in clearance fit with first receiving portion 121. The outer diameter of the second pipe 242 is larger than the inner diameter of the first receiving portion 121, and the outer wall of the second pipe 242 is wrapped by the inner wall of the second receiving portion 122, so as to prevent the gas injection assembly 20 from moving axially relative to the receiving portion 12 more than the gap between the second pipe 242 and the second receiving portion 122. The second pipe 242 and a part of the first pipe 241 can rotate in the accommodating part 12 including the second accommodating part 122 and the first accommodating part 121, and the second pipe 242 does not separate from the second accommodating part 122 during the rotation. In a specific process, the half shell of the first accommodating portion 121 and the half shell of the second accommodating portion 122 axially connected thereto are integrally formed to form a first enclosing portion, the other half shell of the first accommodating portion 121 and the other half shell of the second accommodating portion 122 are integrally formed to form a second enclosing portion, the second pipe 242 and a part of the first pipe 241 are firstly placed in the first enclosing portion, and then the second enclosing portion is closed on the first enclosing portion, so that the first enclosing portion and the second enclosing portion form an accommodating cavity of the accommodating member 12. The first surrounding portion and the second surrounding portion can be connected by welding, bonding and other techniques. After the puncture outfit completes puncture, the puncture core is pulled out of the puncture sleeve, and gas is injected into the abdominal cavity of the patient. As shown in fig. 4 and 5, when the extending direction of the operating rod 23 is parallel to the extending direction of the vent channel 11, the gas injection assembly 20 is in a fully opened state, the notch 231 on the operating rod 23 is engaged with the second protrusion 1212, the gas injection hole 22 on the second tube 242 faces the vent channel 11, the gas injection channel 21 in the gas injection assembly 20 is communicated with the vent channel 11, and in this state, the gas injection speed is fastest. The edge of the gas-injection hole 22 is attached to the gasket 111 provided at the gas inlet of the vent passage 11, so that gas does not overflow from the gap formed by the second pipe 242 and the second receiving portion 122 during the gas injection, and the gas injection efficiency is improved.

Gas is input through the gas inlet of the operating rod 23, enters the vent channel 11 of the sleeve assembly 10 through the gas injection hole 22 along with the gas injection channel 21 in the gas injection assembly 20, and then enters the abdominal cavity through the inner casing 13 of the sleeve bin and the sleeve body 14.

After the gas injection is completed, the operating rod 23 is rotated clockwise, and after the operating rod is rotated 90 °, as shown in fig. 6 and 7, the gas injection assembly 20 is in a closed state, the notch 231 on the operating rod 23 is engaged with the first protrusion 1211, the gas injection hole 22 on the second pipe 242 is completely deviated from the pipe orifice of the vent channel 11 without overlapping, the housing of the second pipe 242 is tightly attached to the gasket 111 disposed at the gas inlet of the vent channel 11, that is, the second end of the vent channel 11 is sealed by the housing of the second pipe 242, so that the gas injection channel 21 in the gas injection assembly 20 is not communicated with the sleeve assembly 10, and because the gasket 111 is tightly attached to the housing of the second pipe 242, the gas in the vent channel 11 does not overflow from the gap between the second pipe 242 and the second accommodating portion 122. Under the action of the sealing devices on the gas injection assembly 20 and the casing bin inner shell 13, the whole casing assembly 10 is in a sealing state, so that the stability of pneumoperitoneum in the operation process is effectively ensured, and the operation is safely and smoothly carried out. It is understood that the number of the first protrusions 1211 can be two, and the two first protrusions 1211 are disposed on two sides of the second protrusion 1212, and the two first protrusions 1211 are disposed on the upper end surface of the first receiving portion 121 in a mirror image manner, so that the surgeon can selectively rotate the operating rod 23 clockwise or counterclockwise to close the insufflation assembly according to the environment around the puncture outfit during the operation.

The puncture cannula of the invention further comprises a cannula housing outer shell 30, referring to fig. 8 and 9, an opening 31 is arranged on the cannula housing outer shell 30, the cannula housing inner shell 13 is arranged in the cannula housing outer shell 30, and the ventilation channel 11 connected to the cannula housing inner shell 13 is partially arranged to protrude out of the cannula housing outer shell 30 through the opening 31.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A puncture cannula comprising a cannula assembly and an insufflation assembly, the cannula assembly comprising a vent channel, the vent channel comprising an air inlet, wherein the insufflation assembly comprises an insufflation channel comprising an air outlet; the gas injection assembly is at least partially disposed in the sleeve assembly and the gas injection assembly is rotatable in the sleeve assembly to selectively communicate the gas injection channel with the vent channel; the puncture cannula further comprises a sealing gasket;

2. The puncture cannula of claim 1, wherein the cannula assembly further includes a receptacle disposed at one end of the vent passage, the receptacle being in communication with the vent passage; the gas injection assembly is at least partially disposed in the receptacle and the gas injection assembly is rotatable in the receptacle.

3. The puncture cannula of any of claims 1 and 2, wherein the insufflation assembly comprises a lock, the lock having the insufflation channel disposed therein, the insufflation channel being a first insufflation channel; the air outlet is positioned on the wall of the locking piece; the lock member includes a rotator.

4. The puncture cannula of claim 3, wherein the insufflation assembly further comprises a handle rod having a second insufflation channel disposed therein, the second insufflation channel being in communication with the first insufflation channel; the gas injection channel includes the first gas injection channel and the second gas injection channel.

5. The puncture cannula of claim 3, wherein the cannula assembly includes a receptacle; the gas injection assembly further comprises an operating rod, and the operating rod is integrally formed with or connected with the locking piece; the revolving body is accommodated in the accommodating part, and the air outlet is positioned on the wall of the revolving body.

6. The puncture cannula of claim 2, wherein the receptacle comprises a body of revolution or an inner surface of the receptacle comprises a surface of revolution.

7. The puncture cannula of claim 1, wherein the seal is disposed on the cannula assembly or the insufflation assembly.

8. The puncture cannula of claim 2, wherein the gasket is disposed at an end of the vent channel where the air inlet is located, the gasket including an aperture in communication with the air inlet.

9. The puncture cannula of claim 8, wherein the gasket is attached to the outer wall of the insufflation assembly.

10. The puncture cannula of claim 3, wherein the seal is disposed on an outer wall of the rotator, the seal including a hole communicating with the air outlet.

11. The puncture cannula of claim 10, wherein the cannula assembly at the location of the air inlet is attached to the gasket.

12. The puncture cannula according to claim 6, wherein the receiving member includes a first receiving portion and a second receiving portion, and a first protrusion and a second protrusion are provided on an upper end surface of the first receiving portion; the gas injection subassembly includes action bars and locking piece, the bottom of action bars is provided with the breach, the breach with first arch with the protruding alternative block of second, the locking piece includes the solid of revolution, second holding portion holding the locking piece.

13. The puncture cannula of claim 12, wherein the first protrusion, the second protrusion and the center of the upper end surface form a sector having a central angle of 90 °.

14. The puncture cannula of claim 12, wherein the upper end surface of the first receiving portion is further provided with a third protrusion, and the third protrusion is arranged symmetrically with the first protrusion; the third protrusion, the second protrusion and the center of the upper end face form a fan-shaped central angle of 90 degrees, and the first protrusion, the second protrusion and the center of the upper end face form a fan-shaped central angle of 90 degrees.

15. The puncture cannula of claim 2, wherein the cannula assembly further comprises a cannula cartridge inner housing and a cannula body disposed at a bottom of the cannula cartridge inner housing, the vent channel is located at a wall of the cannula cartridge inner housing, and the cavity of the cannula cartridge inner housing is in communication with the inner cavity of the cannula body and the vent channel.

16. The puncture cannula of claim 2, further comprising a cannula cartridge housing having an opening formed therein, wherein the cannula assembly partially protrudes from the cannula cartridge housing.