CN216797704U - Biopsy rotary cutting device - Google Patents

Abstract

The utility model provides a biopsy rotary cutting device, which comprises an inner tube and an outer tube which are coaxially arranged, wherein the inner tube is positioned at the inner side of the outer tube and can axially move along the inner tube; the puncture needle is arranged at the first end of the outer pipe, the outer pipe is provided with a sampling groove, and the sampling groove is communicated with a gap between the inner pipe and the outer pipe and an inner cavity of the inner pipe; the sleeve structure is annularly arranged on the outer side of the inner pipe, an annular channel is formed between the sleeve structure and the inner pipe, and the annular channel comprises a non-plugging channel section and a plugging channel section which are connected with each other; a first communication port is formed in the first end of the non-blocking channel section and connected with the gap, and a second communication port is formed in the second end of the blocking channel section and connected with the atmosphere; when the sealing assembly moves to the non-blocking channel section along with the inner tube, the first communication port is communicated with the second communication port; when the sealing assembly moves to the blocking channel section, the sealing assembly blocks the blocking channel section, and the first communicating port and the second communicating port are isolated.

Description

Biopsy rotary cutting device

Technical Field

The utility model relates to the field of medical instruments, in particular to a biopsy rotary cutting device.

Background

The biopsy rotary cutting device is widely used in minimally invasive surgical puncture surgery, and has the advantages of small surgical wound, good healing, small left scar, small injury, quick recovery and the like.

The head of the biopsy rotary-cut device is punctured by a small-diameter puncturing head, the tail of the puncturing head is coaxially fixed with the head of an outer tube, the outer tube is sleeved outside an inner tube which is coaxially assembled, the head of the inner tube is provided with a scalpel, the head of the outer tube is provided with a sampling groove, the inner tube is positioned at the farthest end before puncturing is completed, after puncturing is completed, the inner tube rotates and retreats, the sampling groove is opened, meanwhile, a negative pressure system sucks tumor tissues into the sampling groove, and after rotary-cutting of the tissues is completed, the cut tissues are sucked into a sample collector at the tail of the rotary-cut device through an inner cavity of the inner tube under continuous negative pressure.

In the prior art, when tumor tissues are sucked into a sampling groove, an inner tube needs to move to be in contact with a sealing ring on the outer side of the inner tube, so that a sealing effect is achieved, and the sealing ring can be expanded by the inner tube; when the tumor tissue is sucked into the sample collector from the sampling groove, the inner tube needs to move to a position separated from the sealing ring.

Therefore, in the process of sampling for many times, the sealing ring needs to be contacted and propped open for many times, and then the fatigue damage of the sealing ring can be caused, so that the sealing effect is poor, and the sampling effect is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a biopsy rotary cutting device, which aims to solve the problems that repeated sampling requires repeated opening of a sealing device for pressure relief, fatigue damage to a sealing ring is caused, the sealing effect is poor, and the sampling effect is further influenced.

According to the utility model, the biopsy rotary-cut device comprises an inner tube and an outer tube which are coaxially arranged, wherein the inner tube is positioned at the inner side of the outer tube and can axially move along the inner tube; the first end of the outer pipe is provided with a puncture head, the outer pipe is provided with a sampling groove, the sampling groove is communicated with a gap between the inner pipe and the outer pipe and an inner cavity of the inner pipe, and the outer pipe further comprises a sleeve structure and a sealing assembly;

the sleeve structure is fixedly connected with the outer pipe, the sleeve structure is annularly arranged on the outer side of the inner pipe, an annular channel is formed between the sleeve structure and the inner pipe, the annular channel is located at one end, far away from the puncture head, of the outer pipe along the axial direction of the outer pipe, and the annular channel comprises a non-blocking channel section and a blocking channel section which are connected with each other; a first communication port is arranged at the first end of the non-blocking channel section, the first communication port is directly or indirectly connected with the gap, the second end of the non-blocking channel section is connected with the first end of the blocking channel section, a second communication port is arranged at the second end of the blocking channel section, and the second communication port is directly or indirectly connected with the atmosphere;

the sealing assembly is fixedly arranged on the outer side of the inner pipe and is positioned in the annular channel;

when the sealing assembly moves to the non-blocking channel section along with the inner tube, the first communication port is communicated with the second communication port;

when the sealing assembly moves to the blocking channel section, the sealing assembly blocks the blocking channel section, and the first communication port and the second communication port are separated.

Optionally, the sealing assembly includes: a sealing base and a sealing ring; the sealing base is fixed on the outer wall of the inner pipe, and the sealing ring is sleeved on the outer side of the sealing base;

the diameter of the inner wall of the channel of the blocking channel section is smaller than or equal to the outer diameter of the sealing assembly, and the diameter of the inner wall of the channel of the non-blocking channel section is larger than the outer diameter of the sealing assembly;

when the sealing assembly moves to at least part of the position of the plugging channel section, the outer side of the sealing ring is in fit sealing with the inner wall of the channel of the plugging channel section;

when the sealing assembly moves to at least a partial position of the non-blocked channel section, a space is formed between the outer side of the sealing ring and the inner wall of the channel of the non-blocked channel section.

Optionally, the non-blocking channel segment includes a gradual change channel segment, a first end of the gradual change channel segment is communicated to the gap, and a second end of the gradual change channel segment is connected to the blocking channel segment;

the diameter of the inner wall of the gradual change channel section is gradually reduced along the direction from the first end to the second end of the gradual change channel section.

Optionally, the number of first intercommunication mouth is a plurality of, and is a plurality of first intercommunication mouth winds the axle center circumference evenly distributed of inner tube.

Optionally, the sleeve assembly comprises a first outer tube sleeve and a sealing sleeve;

the first outer pipe sleeve is connected to one end, far away from the puncture head, of the outer pipe, and the first end of the sealing sleeve is fixedly connected to one side, far away from the puncture head, of the first outer pipe sleeve and is annularly arranged on the outer side of the inner pipe; the annular channel is formed between the sealing sleeve and the inner tube;

the first communication port is arranged on the first outer pipe sleeve;

the second communication port is arranged at the second end of the sealing sleeve.

Optionally, the sleeve assembly further comprises a second outer tube sleeve and a steering sleeve;

the first end of the second outer pipe sleeve is fixedly connected to one side, far away from the puncture head, of the first outer pipe sleeve and is annularly arranged on the outer side of the sealing sleeve; the steering sleeve is connected to the second end of the second outer tube sleeve.

Optionally, the second outer tube sleeve is fixedly connected with the first outer tube sleeve through a boss.

Optionally, the sealing sleeve and the first outer sleeve are connected together by glue.

Optionally, the outer tube and the sleeve structure are connected together or integrated by glue;

the sealing assembly and the outer wall of the inner pipe are connected together or integrated through glue.

According to the rotary cutting device for biopsy provided by the utility model, the sealing assembly arranged in the sleeve structure can control the communication and the separation of the first communication port and the second communication port, so that tumor tissue is sucked into the sample collector by the negative pressure system when the first communication port and the second communication port are separated, and the air pressure in the annular channel is recovered when the first communication port and the second communication port are communicated, so that multiple sampling can be conveniently carried out;

meanwhile, the sealing assembly provided by the utility model is fixedly arranged on the outer side of the inner pipe and is positioned in the annular channel, the positions of the inner pipe and the sealing assembly are relatively fixed, the sealing assembly cannot be directly damaged by fatigue due to multiple contact and separation between the inner pipe and the sealing assembly, and the sealing effect is prevented from being damaged.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a first schematic structural view of a biopsy atherectomy device in accordance with an embodiment of the present invention;

FIG. 2 is a second schematic structural view of a biopsy rotational atherectomy device in accordance with an embodiment of the present invention;

FIG. 3 is a third schematic structural view of a biopsy rotational atherectomy device in accordance with an embodiment of the present invention;

fig. 4 is a fourth schematic structural view of a biopsy rotational atherectomy device in accordance with an embodiment of the present invention;

fig. 5 is a fifth schematic structural view of a rotary biopsy cutting device according to an embodiment of the present invention;

fig. 6 is a sixth schematic structural view of a rotary biopsy cutting device according to an embodiment of the present invention;

fig. 7 is a seventh schematic structural view of a biopsy rotational atherectomy device in an embodiment of the present invention.

Fig. 8 is an eighth schematic structural view of a biopsy rotational atherectomy device in an embodiment of the present invention.

Description of the reference numerals

1-an inner tube;

2-an outer tube;

3-clearance;

4-a sleeve structure;

41-a first outer tube sleeve;

42-a sealing sleeve;

421-sealing the front end of the sleeve;

43-a second outer tube sleeve;

44-a steering sleeve;

5-a sealing component;

51-a sealing base;

52-a sealing ring;

6-an annular channel;

61-non-plugged channel segment;

611-a first communication port;

62-blocking the channel section;

621-a second communication port;

7-boss.

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 terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the utility model described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The technical solution of the present invention will be described in detail below with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.

Referring to fig. 1, the rotary biopsy cutting device provided by the present invention includes an inner tube 1 and an outer tube 2, which are coaxially disposed, wherein the inner tube 1 is located inside the outer tube 2 and can move along its own axial direction; a puncture head (not shown in the figure) is arranged at the first end of the outer pipe 2, a sampling groove (not shown in the figure) is arranged on the outer pipe 2, the sampling groove is communicated with a gap 3 between the inner pipe 1 and the outer pipe 2 and an inner cavity of the inner pipe, and the outer pipe further comprises a sleeve structure 4 and a sealing assembly 5;

the sleeve structure 4 is fixedly connected with the outer tube 2, the sleeve structure 4 is annularly arranged on the outer side of the inner tube 1, an annular channel 6 is formed between the sleeve structure and the inner tube 1, the annular channel 6 is located at one end, far away from the puncture head, of the outer tube 2 along the axial direction of the outer tube 2, and the annular channel 6 comprises a non-plugging channel section 61 and a plugging channel section 62 which are connected with each other; a first communication port 611 is arranged at a first end of the non-blocking channel section 61, the first communication port 611 is directly or indirectly connected with the gap 3, a second end of the non-blocking channel section 62 is connected with the first end of the blocking channel section 61, a second communication port 621 is arranged at a second end of the blocking channel section 61, and the second communication port 621 is directly or indirectly connected with the atmosphere;

the sealing assembly 5 is fixedly arranged on the outer side of the inner pipe 1 and is positioned in the annular channel 6;

when the sealing assembly 5 moves to the non-blocking channel section 61 along with the inner tube 1, the first communication port 611 communicates with the second communication port 621;

when the sealing assembly 5 moves to the blocking channel section 62, the sealing assembly 5 blocks the blocking channel section 62, and the first communication port 611 and the second communication port 621 are blocked.

Wherein, the sealing assembly 5 moves with the inner tube 1 to the non-blocking channel section 61, which can be understood as: the sealing assembly 5 completely leaves the blocking channel section 62, any part of the sealing assembly 5 is not in contact with the inner wall of the blocking channel section 62, the first communication port 611 is communicated with the second communication port 621, and at this time, the atmosphere can enter the non-blocking channel section 61 through the second communication port 621 and the blocking channel section 62 and further enter the gap 3 between the inner tube 1 and the outer tube 2 through the first communication port 611;

when the sealing assembly 5 moves to the blocking channel section 62, the sealing assembly 5 blocks the blocking channel section 62, which can be understood as: the seal assembly 5 is completely removed from the non-plugged channel section 61, and no part of the seal assembly 5 is in contact with the channel inner wall of the non-plugged channel section 61; the first communication port 611 and the second communication port 621 are blocked, and at this time, the atmosphere cannot enter the non-blocking passage section 61 through the second communication port 621, and further cannot enter the gap 3 between the inner ring 1 and the outer tube 2 through the first communication port.

In one embodiment, referring to fig. 2 to 4, the sealing assembly 5 includes: a seal base 51 and a seal ring 52; the sealing base 51 (e.g. the bottom thereof) is fixed on the outer wall of the inner tube 1, and the sealing ring 52 is sleeved outside the sealing base 51;

in one example, the sealing base 51 has a groove, and the sealing ring 52 is mounted in the groove; the groove may be an annular groove, and the cross-sectional shape thereof may be rectangular or semicircular, without departing from the scope of the embodiment of the present invention, as long as the seal ring 52 can be fixed to the seal base 51.

For example, the sealing ring 52 may be made of rubber, or other materials such as silica gel.

The diameter of the inner wall of the plugging channel section 62 is smaller than or equal to the outer diameter of the sealing assembly 5, and the diameter of the inner wall of the non-plugging channel section 61 is larger than the outer diameter of the sealing assembly 5;

referring to fig. 2, when the sealing assembly 5 moves to at least a partial position of the blocking channel section 62, the outer side of the sealing ring 52 is in close sealing contact with the inner channel wall of the blocking channel section 62;

it can be seen that when the seal assembly 5 is moved to at least a partial position blocking the channel section 62, the atmosphere is blocked by the seal assembly 5.

Referring to fig. 3, when the sealing assembly 5 moves to at least a partial position of the non-blocked channel section 61, there is a gap between the outer side of the sealing ring 52 and the inner channel wall of the non-blocked channel section 61.

It can be seen that upon movement of the sealing assembly 5 to at least a partial position of the non-plugged channel section 61, atmospheric air can enter the first communication opening 611, and thus the gap 3 between the inner tube 1 and the outer tube 2, via the space between the outer side of the sealing ring 52 and the channel inner wall of the non-plugged channel section 61.

In an exemplary operation, when the inner tube 1 moves backwards along the axial direction, the sealing assembly 5 moves backwards along with the inner tube 1, and when the sealing assembly 5 is in the blocking channel section 62, the negative pressure system is started to enable the inner cavity of the inner tube 1 to be in negative pressure, so that tissues in the sampling groove are sucked into the inner cavity of the inner tube 1 and finally reach the sample collector arranged at the tail end of the inner tube 1, and one-time sampling is completed.

Before the secondary sampling, the inner tube 1 moves forwards along the axial direction, the sealing assembly 5 moves forwards along with the inner tube 1, when the sealing assembly 5 is located in the non-blocking channel section 61, the atmosphere enters the annular channel 6 from the second communication port 621, enters the gap 3 through the first communication port 611, and then enters the inner cavity of the inner tube 1 through the sampling groove, so that the recovery of the air pressure is completed, and when a negative pressure system is started again, a pressure difference can be formed, and tissues are sucked into the sample collector.

It can be seen that, according to the above technical solution, the rotary cutting device for biopsy provided by the present invention, through the sealing assembly 5 disposed inside the sleeve structure 4, can control the communication and the separation of the first communication port 611 and the second communication port 621, so that the tumor tissue is sucked into the sample collector by the negative pressure system when the first communication port 611 and the second communication port 621 are separated, and the air pressure in the annular channel is recovered when the first communication port 611 and the second communication port 621 are communicated, so as to sample for multiple times;

meanwhile, the sealing assembly 5 provided by the utility model is fixedly arranged outside the inner tube 1 and is positioned in the annular channel 6, the positions of the inner tube 1 and the sealing assembly 5 are relatively fixed, fatigue damage to the sealing assembly 5 due to multiple contact and separation between the inner tube 1 and the sealing assembly 5 is avoided, and the sealing effect is prevented from being damaged.

In one embodiment, referring to fig. 4, the non-blocking channel section 61 includes a gradually changing channel section, a first end of the gradually changing channel section is connected to the gap 3, and a second end of the gradually changing channel section is connected to the blocking channel section 62;

the diameter of the channel inner wall of the gradual channel section gradually decreases in the direction from the first end to the second end of the gradual channel section (i.e., from left to right in fig. 4).

In one example, the diameter of the second end of the tapered channel is equal to the diameter of the inner wall of the plugged channel section 62, and the diameter of the first end of the tapered channel is greater than the diameter of the inner wall of the plugged channel section 62. In other examples, the diameters of the first and second ends of the tapered channel are larger than the diameter of the inner wall of the blocking channel section 62.

In one embodiment, referring to fig. 5, the number of the first communication ports 611 is multiple, and the first communication ports 611 are uniformly distributed around the axial center of the inner tube 1.

In an example, the number of the first communication ports 611 may be 6, 8, or other numbers.

In one embodiment, referring to fig. 6, the sleeve assembly 4 includes a first outer tube sleeve 41 and a sealing sleeve 42;

the first outer tube sleeve 41 is connected to one end of the outer tube 2, which is far away from the puncture head, and the first end of the sealing sleeve 42 is fixedly connected to one side of the first outer tube sleeve 41, which is far away from the puncture head, and is annularly arranged outside the inner tube 1; the annular channel 6 is formed between the sealing sleeve 41 and the inner tube 1;

wherein the sealing sleeve 42 is located inside the sleeve structure 4, said annular channel 6 can be understood as: the side of the first outer tube sleeve 41 far away from the puncture head is annularly arranged in a space formed between the inner wall of the sealing sleeve 42 of the inner tube 1 and the outer wall of the inner tube 1; the inner shell of the sealing sleeve 42 forms the non-plugged channel section 61 and the plugged channel section 62 described above;

the first communication port 611 is provided in the first outer tube sleeve 41;

in one example, the first communication port 611 is provided on the inner wall of the first outer tube sleeve 41, and in other examples, the first communication port may be provided at other positions of the first outer tube sleeve 41, and as long as the first communication port can communicate the gap 3 and the annular passage 6 between the inner tube 1 and the outer tube 2, the scope of the embodiment of the present invention is not limited.

The second communication port 621 is provided at the second end of the seal sleeve 42, may be located on the side of the seal sleeve 42 away from the axial center, or may be located on the side of the seal sleeve 42 close to the axial center, and may be communicated with the first communication port 611 when the seal assembly 5 is in the blocking passage section 62 and when the seal assembly 5 is in the non-blocking passage section 61, without departing from the scope of the embodiment of the present invention, as long as the second communication port is blocked by the seal assembly 5.

In one embodiment, referring to fig. 7, the sleeve assembly 4 further includes a second outer tube sleeve 43 and a steering sleeve 44;

the first end of the second outer tube sleeve 43 is fixedly connected to one side of the first outer tube sleeve 41 away from the puncture head, and is annularly arranged outside the sealing sleeve 42; the steering sleeve 44 is connected to a second end of the second outer tube sleeve 43. Wherein the steering sleeve 44 is used for driving the outer tube 2 to perform a rotational movement in the circumferential direction.

In one embodiment, referring to fig. 8, the second outer tube sleeve 43 is fixedly connected to the first outer tube sleeve 41 by a boss 7.

In one embodiment, the sealing sleeve 42 and the first outer tube sleeve 41 are joined together by glue.

Specifically, referring to fig. 8, the front end surface 421 of the sealing sleeve 42 can be glued to the inner wall of the first outer tube sleeve 41.

In one embodiment, the outer tube 2 and the sleeve structure 4 are joined together or integrated by glue;

specifically, the inner wall of the first outer tube sleeve 41 may be glued to the outer wall of the outer tube 2 by glue, and the first outer tube sleeve 41 may also be made of a thermoplastic material, which is thermoplastic to the outer wall of the outer tube 2.

The sealing component 5 and the outer wall of the inner pipe 1 are connected together or integrated through glue;

specifically, the sealing base 51 (e.g., the bottom of the sealing base) can be fixed on the outer wall of the inner tube 1 by gluing or thermal welding.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (9)

1. A biopsy rotary-cut device comprises an inner tube and an outer tube which are coaxially arranged, wherein the inner tube is positioned at the inner side of the outer tube and can axially move along the inner tube; the puncture needle is arranged at the first end of the outer pipe, the outer pipe is provided with a sampling groove, and the sampling groove is communicated with a gap between the inner pipe and the outer pipe and an inner cavity of the inner pipe;

the sleeve structure is fixedly connected with the outer pipe, the sleeve structure is annularly arranged on the outer side of the inner pipe, an annular channel is formed between the sleeve structure and the inner pipe, the annular channel is located at one end, far away from the puncture head, of the outer pipe along the axial direction of the outer pipe, and the annular channel comprises a non-blocking channel section and a blocking channel section which are connected with each other; a first communication port is arranged at the first end of the non-blocking channel section, the first communication port is directly or indirectly connected with the gap, the second end of the non-blocking channel section is connected with the first end of the blocking channel section, a second communication port is arranged at the second end of the blocking channel section, and the second communication port is directly or indirectly connected with the atmosphere;

the sealing assembly is fixedly arranged on the outer side of the inner pipe and is positioned in the annular channel;

when the sealing assembly moves to the non-blocking channel section along with the inner tube, the first communication port is communicated with the second communication port;

when the sealing assembly moves to the blocking channel section, the sealing assembly blocks the blocking channel section, and the first communication port and the second communication port are separated.

2. The rotational biopsy atherectomy device of claim 1, wherein the seal assembly comprises: a sealing base and a sealing ring; the sealing base is fixed on the outer wall of the inner pipe, and the sealing ring is sleeved on the outer side of the sealing base;

the diameter of the inner wall of the channel of the blocking channel section is smaller than or equal to the outer diameter of the sealing assembly, and the diameter of the inner wall of the channel of the non-blocking channel section is larger than the outer diameter of the sealing assembly;

when the sealing assembly moves to at least part of the plugging channel section, the outer side of the sealing ring is in fit sealing with the inner wall of the plugging channel section;

when the sealing assembly moves to at least a partial position of the non-blocked channel section, a space is formed between the outer side of the sealing ring and the inner wall of the channel of the non-blocked channel section.

3. The rotational atherectomy device of claim 2, wherein the non-occluding channel section comprises a graduated channel section, a first end of the graduated channel section communicating to the gap, a second end of the graduated channel section communicating with the occluding channel section;

the diameter of the inner wall of the gradual change channel section is gradually reduced along the direction from the first end to the second end of the gradual change channel section.

4. The rotational atherectomy device of any one of claims 1 to 3, wherein the first communication ports are a plurality of ports, and the plurality of first communication ports are evenly distributed circumferentially around the axial center of the inner tube.

5. The rotational atherectomy device of any one of claims 1 to 3, wherein the sleeve structure comprises a first outer tubular sleeve and a sealing sleeve;

the first outer pipe sleeve is connected to one end, far away from the puncture head, of the outer pipe, and the first end of the sealing sleeve is fixedly connected to one side, far away from the puncture head, of the first outer pipe sleeve and is annularly arranged on the outer side of the inner pipe; the annular channel is formed between the sealing sleeve and the inner tube;

the first communication port is arranged on the first outer pipe sleeve;

the second communication port is arranged at the second end of the sealing sleeve.

6. The rotational atherectomy device of claim 5, wherein the sleeve assembly further comprises a second outer tube sleeve and a steering sleeve;

the first end of the second outer pipe sleeve is fixedly connected to one side, away from the puncture head, of the first outer pipe sleeve and is annularly arranged on the outer side of the sealing sleeve; the steering sleeve is connected to the second end of the second outer tube sleeve.

7. The rotational atherectomy device of claim 6, wherein the second outer tube sleeve is fixedly coupled to the first outer tube sleeve by a boss.

8. The rotational atherectomy device of claim 6, wherein the sealing sleeve and the first outer sleeve are attached together by glue.

9. The rotational atherectomy device of any one of claims 1 to 3, wherein the outer tube and the sleeve structure are attached together or integral by glue;

the sealing assembly and the outer wall of the inner pipe are connected together or integrated through glue.

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