CN115969485A - Puncture outfit - Google Patents

Abstract

The present invention provides a puncture instrument, comprising: the inner sealing cover is arranged at the rear end of the inner sleeve; the interior sleeve pipe is equipped with interior sleeve pipe chamber, interior sealed lid is provided with the apparatus hole, delivers passageway and enclosed construction, the apparatus hole with deliver the passageway can respectively with interior sleeve pipe chamber intercommunication, the enclosed construction can with the apparatus hole with it seals to deliver the passageway, has solved among the laparoscopic surgery abdominal cavity incision too big technical problem.

Description

Puncture outfit

Technical Field

The invention relates to the technical field of medical instruments, in particular to a puncture outfit.

Background

Laparoscopic surgical robots perform single-port surgery, and there are generally two solutions: (1) Performing an operation through a multi-channel puncture outfit, and punching an auxiliary hole on the abdominal cavity of a patient to be used as a port for transmitting auxiliary instruments; (2) A large incision is made on the abdominal cavity of a patient, an incision protective sleeve is sleeved on the incision, then a cover is sleeved on the incision protective sleeve, a large hole and a small hole are formed in the cover, a multi-channel puncture outfit penetrates through the large hole in the cover, and the small hole is used as an auxiliary hole for performing an operation. In the scheme (1), an auxiliary hole needs to be additionally formed in the operation process, so that an incision is added; the area of incision in scheme (2) is bigger, and scheme (1) and scheme (2) all can cause great damage to the patient, therefore, at present, laparoscopic surgery usually has the too big problem of abdominal cavity incision.

Disclosure of Invention

The invention aims to provide a puncture outfit to solve the technical problem of overlarge abdominal incision in endoscopic surgery.

The above object of the present invention can be achieved by the following technical solutions:

the present invention provides a puncture instrument, comprising: the inner sealing cover is arranged at the rear end of the inner sleeve; the inner sleeve is provided with an inner sleeve cavity, the inner sealing cover is provided with an instrument hole, a delivery channel and a sealing structure, the instrument hole and the delivery channel can be communicated with the inner sleeve cavity respectively, and the sealing structure can seal the instrument hole and the delivery channel.

In a preferred embodiment, the delivery channel is a delivery aperture; the closure structure includes a first closure flap for closing the instrument aperture and a second closure flap for closing the delivery aperture.

In a preferred embodiment, the inner sealing cap comprises a first inner sealing cap body and a first sealing ring, and the instrument aperture and the delivery aperture are both disposed in the first inner sealing cap body; the first sealing ring is arranged on the front side of the first inner sealing cover, and the first closing flap and the second closing flap are arranged on the first sealing ring.

In a preferred embodiment, the delivery hole includes a delivery portion and an extension portion communicating with each other.

In a preferred embodiment, the extension portion is a linear hole or a triangular hole.

In a preferred embodiment, the puncture instrument comprises a plug adapted to the delivery hole, the plug being detachably mounted to the delivery hole.

In a preferred embodiment, the plug head is provided with a passage hole.

In a preferred embodiment, the plug head includes a beveled portion, a cylindrical portion, and a flange portion that are distributed in a front-to-rear direction.

In a preferred embodiment, the rear end of the inner sleeve is provided with an inner disc provided with an instrument hole and a delivery channel corresponding to the inner sealing cap.

In a preferred embodiment, an outer sealing cover is connected to the rear end of the outer sleeve, and is provided with a third closing flap; the inner sleeve penetrates through the outer sealing cover from back to front.

In a preferred embodiment, the lateral surface of the outer sleeve is provided with a longitudinal opening; the inner sleeve comprises a main body pipe part and an auxiliary pipe part, and a delivery channel in a groove shape is arranged on the side surface of the main body pipe part; the inner sealing cover comprises a second inner sealing cover body and a second sealing ring which are arranged at the rear end of the main body pipe part, the second sealing ring is provided with the sealing structure, and the second inner sealing cover body and the auxiliary pipe part are respectively provided with the instrument hole; the auxiliary tube portion is detachably attached to the delivery passage.

In a preferred embodiment, the auxiliary tube portion is provided with a lateral connection post, and the main body tube portion is provided with a lateral mounting groove in which the lateral connection post is detachably mounted.

In a preferred embodiment, the outer sleeve is provided with a leading end sealing structure which is located on the front side of the auxiliary tube portion and is capable of self-closing without an external force.

In a preferred embodiment, the inner sealing cover is made of a flexible material at least in part, and the delivery passage is a delivery hole capable of being closed.

In a preferred embodiment, the puncture device comprises a puncture needle.

The invention has the characteristics and advantages that: after the puncture outfit completes puncture, the outer sleeve can puncture the incision, and an operation channel is built through the outer sleeve. The inner sleeve provides a passage for the instrument and the inner sealing cover is used for preventing gas leakage and maintaining pneumoperitoneum. The surgical instrument can be operated through the instrument hole; when the needle threading operation is carried out, the needle thread can be delivered through the delivery hole without adding an auxiliary hole or opening a larger open hole, and after the needle is delivered, the delivery hole can be closed by the closing structure to avoid air leakage. In the operation, the surgical instrument can be operated by the puncture outfit, and can complete the operations of delivering needles and threads, thereby being convenient for the operation and being beneficial to reducing the size of the operation incision.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic view of a single hole procedure;

FIG. 2 is a schematic structural view of an embodiment of the puncture device provided in the present invention;

FIG. 3 is a schematic view of the inner cannula and inner seal cap of the puncture instrument shown in FIG. 2;

FIGS. 4-5 are schematic views of the first seal ring of the puncture instrument shown in FIG. 2;

FIGS. 6-7 are schematic views showing the structure of the outer cannula of the puncture instrument shown in FIG. 2;

FIGS. 8 to 9 are schematic structural views of an outer seal gasket in the puncture instrument shown in FIG. 2;

FIGS. 10-11 are exploded views of other embodiments of the penetrator provided by the present invention;

FIGS. 12-14 are schematic views showing the structure of the inner seal cap of the puncture outfit provided by the present invention;

FIG. 15 is a schematic structural view of a puncture instrument according to yet another embodiment of the present invention;

FIG. 16 is a schematic view of the inner cannula and inner seal cap of the puncturing device shown in FIG. 15;

FIGS. 17-18 are schematic views of the first seal of the puncture instrument shown in FIG. 15;

FIG. 19 is a schematic view showing the structure of a stopper in the puncture instrument shown in FIG. 15;

FIGS. 20-21 are exploded views of other embodiments of the penetrator provided by the present invention;

FIGS. 22-23 are exploded views of yet another embodiment of the penetrator provided by the present invention;

FIGS. 24-25 are schematic views of the second seal of the puncture instrument shown in FIG. 22;

FIGS. 26 to 27 are schematic views showing the structure of the auxiliary tubular body gasket in the puncture instrument shown in FIG. 22;

FIG. 28 is a schematic structural view of an outer cannula of the puncture instrument shown in FIG. 22;

FIG. 29 is a schematic surgical view of the puncture instrument shown in FIG. 22;

FIG. 30 is an exploded view of another embodiment of the penetrator provided by the present invention;

FIG. 31 is a schematic structural view of a puncture instrument according to yet another embodiment of the present invention;

FIG. 32 is a schematic view of the inner cannula and inner seal cap of the puncturing device shown in FIG. 31;

FIGS. 33-34 are schematic views of the first seal ring of the puncture instrument shown in FIG. 31;

FIGS. 35-36 are schematic views of alternate embodiments of the puncture instrument provided by the present invention;

FIG. 37 is an exploded view of the inner cannula of the spike of the present invention;

FIG. 38 is an exploded view of another embodiment of the inner cannula of the penetrator provided by the present invention;

FIG. 39 is a schematic view of a puncture instrument according to another embodiment of the present invention;

FIG. 40 is a schematic view of the operation of the puncture instrument provided in the present invention;

FIG. 41 is a cross-sectional view of the puncture instrument and needle provided by the present invention;

FIG. 42 is a sectional view of the outer sheath of the puncture instrument provided by the present invention.

The reference numbers illustrate:

10. an outer sleeve; 101. a longitudinal opening; 100. puncturing needle; 102. a front to back direction;

11. a front end sleeve; 12. a front end sealing structure;

20. an outer sealing cover; 21. pressing the outer sleeve; 22. an outer seal gasket; 23. a third closure flap;

30. an inner sleeve; 301. an inner tray body; 302. an inner sleeve gland; 303. an inner cannula lumen;

31. a main body tube portion; 311. a transverse mounting groove; 32. an auxiliary tube portion; 321. a transverse connecting column;

40. an inner sealing cover; 41. an instrument hole; 42. a delivery channel; 43. a delivery aperture; 471. a delivery section; 472. a linear hole portion; 473. a triangular hole portion; 431. a first inner seal cover; 432. a first seal ring; 441. a second inner seal cover; 442. a second seal ring; 451. an auxiliary tube body cover plate; 452. an auxiliary tube body sealing gasket; 46. a gasket; 50. a closed structure; 51. a first closure flap; 52. a second closure flap; 53. a cross-shaped cut;

60. a plug head; 601. a passage hole; 61. a beveled portion; 62. a cylindrical portion; 63. a flange part;

70. a flexible channel aperture; 80. a gas injection mechanism; 81. an air injection valve;

91. an endoscope; 92. surgical forceps; 93. and (6) needles and wires.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The present invention provides a puncture instrument, as shown in fig. 2 to 5 and 40 to 42, comprising: the inner sealing cover 40 is arranged at the rear end of the inner sleeve 30; the inner cannula 30 is provided with an inner cannula lumen 303, the inner sealing cap 40 is provided with an instrument hole 41, a delivery channel 42 and a closing structure 50, the instrument hole 41 and the delivery channel 42 can be respectively communicated with the inner cannula lumen 303, and the closing structure 50 can close the instrument hole 41 and the delivery channel 42.

After the puncture is completed, the outer sleeve 10 can puncture the incision, and an operation channel is built through the outer sleeve 10. The inner cannula 30 provides a passage for the instrument and the inner seal cap 40 serves to prevent gas leakage and maintain pneumoperitoneum. Surgical instruments may be manipulated through the instrument holes 41; when the needle threading operation is performed, the delivery needle thread 93 may be delivered through the delivery hole 43, and after the needle is delivered in, the closure structure 50 may close the delivery hole 43 to avoid air leakage. In the operation, the surgical instrument can be operated through the puncture outfit, and can complete the operations of delivering the needle and the thread 93, etc., thereby being convenient for the operation and being beneficial to reducing the size of the operation incision.

During penetration, the inner cannula 30 is inserted into the outer cannula 10 to create a passageway without the need for additional auxiliary holes or a larger opening. The outer sleeve 10 can be fixed at the tail end of the robot, and the instrument hole 41 can be matched with a surgical instrument in normal operation; the delivery hole 43 may function as an auxiliary hole, and an aspirator and other manual instruments may be inserted in addition to the needle delivery wire 93. In one embodiment, the puncture outfit comprises an insufflation mechanism 80, the insufflation mechanism 80 is connected to the outer cannula 10 and communicates with the inner cavity of the outer cannula 10, and the insufflation mechanism 80 is used for intraoperative insufflation to build pneumoperitoneum. The insufflation mechanism 80 may include an insufflation valve 81.

In one embodiment, the delivery channel 42 is a delivery aperture 43; the closure structure 50 comprises a first closure flap 51 for closing the instrument aperture 41 and a second closure flap 52 for closing the delivery aperture 43. The instrument can pass through the first closing flap 51, and the first closing flap 51 can wrap the instrument to ensure air tightness; when the instrument is extracted, the first closing flap 51 can close automatically to ensure the airtightness of the abdominal cavity. The guidewire can be passed through the second closure flap 52 and the second closure flap 52 can be automatically closed after the guidewire is delivered to maintain hermeticity. As shown in fig. 4 and 5, the second closing flap 52 includes a plurality of flaps that form a cross-shaped incision 53, and the cross-shaped incision 53 can be automatically closed.

Further, the inner seal cover 40 includes a first inner seal cover body 431 and a first seal ring 432, and the instrument hole 41 and the delivery hole 43 are both provided in the first inner seal cover body 431; a first seal 432 is provided on the front side of the first inner seal cover 40, and both the first closing flap 51 and the second closing flap 52 are provided on the first seal 432. The first sealing ring 432 is a multi-channel sealing ring for ensuring the air tightness of the abdominal cavity; the first inner seal cover 431 is attached to the rear end of the inner tube 30 to fix the first seal ring 432, and the inner seal cover 40 can effectively prevent gas leakage and maintain pneumoperitoneum. The first seal 432 may be a silicone material, and is attached to the inner tube 30 with the same cross-sectional shape as the inner tube 30. The first sealing ring 432 is provided with an instrument bore 41 and a delivery bore 43 corresponding to the first inner gland body 431, the first closure flap 51 being located in the instrument bore 41 on the first sealing ring 432 and the second closure flap 52 being located in the delivery bore 43 on the first sealing ring 432. The first inner gland body 431 is removably mounted to the inner sleeve 30 by snap-fitting or the like.

In one embodiment, the delivery holes 43 are shaped holes that are non-circular holes, but are not limited to oval, conical, etc. shapes. The number of the delivery holes 43 may be one or more, the number of the instrument holes 41 is preferably plural, and the delivery holes 43 are closely arranged with the instrument holes 41.

Further, as shown in fig. 2-3 and 12, the delivery hole 43 includes a delivery portion 471 and an extension portion communicating with each other, so that the matrix line can pass through the delivery hole 43 more easily, the delivery hole 43 increases the passage space, facilitates the operation of delivering the needle line 93 and the like, and can be adapted to various size instruments; meanwhile, the size of the delivery part 471 can be reduced, which is beneficial to reducing the overall cross-sectional area of the delivery hole 43. The delivery part 471 is larger in size compared to the extension part, the extension part is disposed outside the delivery part 471, preferably, the delivery part 471 is disposed between the two extension parts, however, the shape of the delivery hole 43 may also take other forms, for example: the delivery part 471 is disposed at one end of one extension part. The delivery part 471 may be substantially circular in shape.

The shape of the extension may be varied. As shown in fig. 12, the extension portion may be a linear hole portion 472, and preferably, at least two linear hole portions 472 are symmetrically disposed at both sides of the delivery portion 471.

In another embodiment, the extension is a triangular hole portion 473, and as shown in fig. 13, the delivery hole 43 includes a delivery portion 471 and the triangular hole portion 473 in communication. As shown in fig. 13, at least two triangular hole parts 473 are symmetrically arranged on both sides of the delivery part 471.

In one embodiment, as shown in fig. 15 and 16, the puncture outfit comprises a plug head 60 matched with the delivery hole 43, the plug head 60 is detachably mounted on the delivery hole 43 of the first inner sealing cover body 431, and the delivery hole 43 is effectively closed by the plug head 60, so that even if the delivery hole 43 is relatively large, the pneumoperitoneum can be well kept, and the delivery hole 43 can be relatively large. The structure of the straight-line opening is simpler, the structure of the special-shaped hole plugging head 60 has better tightness, and the special-shaped hole plugging head can be adapted to instruments with more sizes, so that the space of the auxiliary channel is enlarged, and the channel stroke is shortened.

Further, the plug 60 is provided with a passage hole 601, so that an instrument passage is established through the plug 60, and when the plug 60 is installed, a surgical instrument can be operated through the passage hole 601 on the plug 60; when the plug 60 is removed, the delivery hole 43 can be used as an auxiliary channel for delivering the needle wire 93, and a surgical instrument such as an aspirator can be used. As shown in fig. 13, 15, and 20 to 21, the delivery hole 43 includes a delivery part 471 and triangular hole parts 473 that communicate with each other, and the two triangular hole parts 473 are symmetrically arranged on both sides of the delivery part 471.

When larger objects such as the needle thread 93 and the like or other dimension instruments need to be delivered through the delivery hole 43, the plug head 60 can be taken down to directly deliver the objects such as the needle thread 93 and the like; after the use, the plug head 60 is plugged, and the robot surgical instrument is inserted to continue the operation. By optimizing the plug head 60 and the delivery hole 43, the operation space can be enlarged, and surgical instruments with more sizes can be applied.

As shown in fig. 2 and 19, the plug 60 includes a chamfered portion 61, a cylindrical portion 62, and a rib portion 63 distributed in a front-to-rear direction 102 to facilitate mounting and positioning of the plug 60 on the delivery hole 43.

In one embodiment, the rear end of the inner cannula 30 is provided with an inner disc 301, as shown in figures 3 and 16, the inner disc 301 is provided with an instrument hole 41 and a delivery channel 42 corresponding to the inner seal cap 40.

As shown in fig. 1 to 11, an outer sealing cap 20 is attached to the rear end of the outer sleeve 10, and the outer sealing cap 20 is provided with a third closing flap 23; the inner sleeve 30 is inserted into the outer seal cap 20 from the rear to the front. The outer sleeve 10 establishes the whole operation channel, the third closing flap 23 is used for penetrating the inner sleeve 30 and the puncture needle 100 and realizing the sealing, and when the inner sleeve 30 and the puncture needle 100 are pulled out, the third closing flap 23 automatically closes the cross-shaped incision 53 and keeps the air tightness.

Specifically, as shown in fig. 6 to 9, the outer sealing cap 20 includes an outer sleeve gland 21 and an outer sealing gasket 22, the outer sleeve gland 21 fixes the outer sealing gasket 22, and the outer sleeve gland 21 may be fast-assembled on the outer sleeve 10 by a method including, but not limited to, a threaded connection. The outer sealing gasket 22 is provided with a sealing gasket through hole, and when an instrument passes through the sealing gasket through hole of the outer sealing gasket 22, the third closing flap 23 wraps the instrument to ensure air tightness.

In another embodiment, as shown in fig. 22 and 23, the lateral surface of the outer sleeve 10 is provided with a longitudinal opening 101; the inner sleeve 30 comprises a main body tube part 31 and an auxiliary tube part 32, and a delivery channel 42 in a groove shape is arranged on the side surface of the main body tube part 31; the inner seal cover 40 includes a second inner seal cover 441 and a second seal ring 442 provided at the rear end of the main body tube portion 31, the second seal ring 442 is provided with a seal structure 50, and the second inner seal cover 441 and the auxiliary tube portion 32 are respectively provided with an instrument hole 41; the auxiliary tube portion 32 is detachably mounted to the delivery passage 42. As shown in fig. 24-25, the second seal 442 is provided with a first closure flap 51, and the main body tube portion 31 of the inner sleeve 30 provides a passage for the instrument. The auxiliary tube portion 32 may also provide additional access for robotic surgical instruments when the auxiliary tube portion 32 is installed; when the auxiliary tube part 32 is detached, the space of the groove-like delivery passage 42 is left, as shown in fig. 29, and the third needle 93 and the like can be easily operated using the space. In operation, when using the robotic instrument, the upper auxiliary tube portion 32 is installed; in the case where it is necessary to use a conventional instrument or aspirator, etc., the auxiliary tube portion 32 is detached, thereby reducing the stroke of the passage, realizing a passage having a shorter stroke, and increasing the space for movement of the conventional surgical instrument.

As shown in fig. 22, the auxiliary tube part 32 is provided with a lateral coupling post 321, the main body tube part 31 is provided with a lateral mounting groove 311, and the lateral coupling post 321 is detachably mounted in the lateral mounting groove 311 to position and fix the auxiliary tube part 32 and the main body tube part 31. Further, can set up the buckle on the horizontal spliced pole 321 to with main part pipe portion 31 joint, the installation and the dismantlement of convenient supplementary pipe portion 32 realize the quick detach. The auxiliary tube portion 32 and the main tube portion 31 are not limited to the snap connection, and may be connected by a screw or the like. In one embodiment, the auxiliary tube portion 32 is provided with a grasping portion to facilitate hand-held detachment. The manner of mounting the auxiliary tube portion 32 to the delivery passage 42 is not limited to the above-described connection manner, and other connection manners may be adopted to achieve detachability, for example: snap fit, elastomeric material, or magnet.

As shown in fig. 22 to 23 and 30, the main body tube portion 31 of the inner tube 30 has a special-shaped structure. The auxiliary pipe body is provided with an auxiliary pipe body sealing gasket 452 and an auxiliary pipe body cover plate 451, and the auxiliary pipe body sealing gasket 452 is installed at the auxiliary pipe body and used for sealing the auxiliary pipe body; the auxiliary pipe body cover plate 451 is mounted at the auxiliary pipe body by means of a snap fit or the like, for fixing the auxiliary pipe body packing 452, for ensuring airtightness.

As shown in fig. 28, the outer tube 10 is provided with the tip seal structure 12, and the tip seal structure 12 is located on the front side of the auxiliary tube portion 32 and can be self-closed without an external force. The forward end seal structure 12 may be a closed lobe structure. The front end of the outer sleeve 10 is connected with a front end sleeve 11 for penetrating into an abdominal incision. Further, the front end sleeve 11 has a chamfered cut to provide a large movement space for the auxiliary passage.

In one embodiment, the inner sealing cap 40 is made of at least partially flexible material, the delivery channel 42 is a delivery hole 43 capable of being closed, the delivery channel 42 is configured as a flexible channel hole 70, a surgical instrument can pass through the flexible channel hole 70 in normal operation, when the auxiliary channel is needed, the flexible channel hole 70 can be used as an auxiliary channel to carry out operations such as delivering a needle wire 93, and the like, and the flexible channel hole 70 can be deformed according to the size of the inserted instrument.

The inner sealing cover 40 may include a first inner sealing cover 431 and a first sealing ring 432, the flexible passage hole 70 may be disposed in the first sealing ring 432, the first sealing ring 432 may be made of a flexible material such as silicone, and an instrument may enter the flexible passage hole 70 through flexible deformation. Further, the first sealing ring 432 may be built together with the inner sleeve 30 by processes such as co-building of silica gel, etc. to build a flexible channel hole 70. The flexible passage hole 70 is a variable diameter passage, and the needle delivery line 93 can be completed by using the flexible passage hole 70 and is suitable for surgical instruments with different sizes.

In one embodiment, as shown in fig. 39, the puncture instrument includes a puncture needle 100, and the puncture needle 100 is used in cooperation with the outer tube 10 and is detached and replaced with the inner tube 30 after use.

As shown in fig. 37 and 38, the outer tube 10 is connected with a gasket 46 for preventing gas leakage and maintaining pneumoperitoneum. The inner sleeve 30 body can be provided with the gasket 46, then the inner sleeve gland 302 is arranged, and the inner sleeve gland 302 and the inner sleeve 30 body can be connected in a threaded manner, an interference fit manner and the like.

As shown in fig. 1 to 42, the puncture instrument has the following advantages: (1) The purpose of pure single hole is realized under the condition of not enlarging the incision of the patient; (2) avoiding re-opening the hole when using a manual instrument in the operation; (3) the number of puncture outfits used in the same operation is reduced; (4) When the auxiliary channel is used, all instruments do not need to be disassembled, and the porous operating platform does not need to be replaced.

The above description is only a few embodiments of the present invention, and those skilled in the art can make various changes or modifications to the embodiments of the present invention according to the disclosure of the application document without departing from the spirit and scope of the present invention.

Claims (14)

1. A puncture instrument, comprising: the inner sealing cover is arranged at the rear end of the inner sleeve;

the inner sleeve is provided with an inner sleeve cavity, the inner sealing cover is provided with an instrument hole, a delivery channel and a sealing structure, the instrument hole and the delivery channel can be communicated with the inner sleeve cavity respectively, and the sealing structure can seal the instrument hole and the delivery channel.

2. The puncture instrument according to claim 1, wherein the delivery channel is a delivery hole; the closure structure includes a first closure flap for closing the instrument aperture and a second closure flap for closing the delivery aperture.

3. The puncture instrument of claim 2, wherein the inner seal cap comprises a first inner seal cap body and a first seal ring, the instrument aperture and the delivery aperture each being disposed in the first inner seal cap body; the first sealing ring is arranged on the front side of the first inner sealing cover, and the first closing flap and the second closing flap are arranged on the first sealing ring.

4. The puncture instrument according to claim 1 or 2, wherein the delivery passage is provided with a delivery hole including a delivery portion and an extension portion communicating with each other.

5. The puncture instrument according to claim 4, wherein the extended portion is a linear hole portion or a triangular hole portion.

6. The puncture instrument according to claim 5, comprising a plug adapted to the delivery hole, the plug being detachably mounted to the delivery hole.

7. A puncture instrument according to claim 6, characterized in that the plug head is provided with a passage hole.

8. The puncture instrument according to claim 6, wherein the plug includes a bevel portion, a cylindrical portion, and a flange portion that are distributed in a front-to-rear direction.

9. The puncture instrument according to claim 1, wherein the rear end of the inner cannula is provided with an inner disk provided with an instrument hole and a delivery channel corresponding to the inner sealing cap.

10. The puncture instrument according to claim 1, wherein an outer sealing cap is connected to a rear end of the outer cannula, the outer sealing cap being provided with a third closing flap; the inner sleeve penetrates through the outer sealing cover from back to front.

11. The puncture instrument according to claim 1, wherein the lateral surface of the outer cannula is provided with a longitudinal opening; the inner cannula includes a main body tube portion and an auxiliary tube portion detachably mounted to the delivery passage.

12. The puncture instrument according to claim 11, wherein the auxiliary tube portion is provided with a lateral attachment post, and the main body tube portion is provided with a lateral mounting slot in which the lateral attachment post is detachably mounted.

13. The puncture instrument according to claim 11, wherein the outer tube is provided with a front end sealing structure which is located on a front side of the auxiliary tube portion and is capable of self-closing without an external force.

14. The puncture instrument according to claim 1, wherein the inner sealing cap is at least partially made of a flexible material, and the delivery passage is a delivery hole that can be closed.

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