CN221154169U

CN221154169U - Ultrasonic catheter structure

Info

Publication number: CN221154169U
Application number: CN202322487586.6U
Authority: CN
Inventors: 吴科; 梁争争; 黄朋涛; 刘珲祯; 曹键波
Original assignee: Suzhou Bodong Rongying Medical Technology Co ltd; Shanghai Bodong Medical Technology Co ltd
Current assignee: Suzhou Bodong Rongying Medical Technology Co ltd; Shanghai Bodong Medical Technology Co ltd
Priority date: 2023-09-13
Filing date: 2023-09-13
Publication date: 2024-06-18
Anticipated expiration: 2033-09-13

Abstract

The utility model discloses an ultrasonic catheter structure, and belongs to the technical field of interventional catheters. Compared with the prior art, the ultrasonic catheter structure has the advantages that the first sealing element is arranged between the inner tube and the middle tube, and the size of the first sealing element is reduced on the premise of ensuring the sealing performance, so that the projection area of the first sealing element on the cross section of the outer tube is reduced, the purpose of reducing the moving friction force of the middle tube in the outer tube is achieved, the pushing performance of the middle tube and the convenience in the clinical use process are greatly improved, and the risk of breakage of the middle tube is also reduced; meanwhile, the sealing structure is simple, the process is easy to realize, and the sealing effect is good.

Description

Ultrasonic catheter structure

Technical Field

The utility model relates to the technical field of interventional catheters, in particular to an ultrasonic catheter structure.

Background

IVUS catheters require the transmission and reception of ultrasound waves for imaging at high rotational speeds, while at the same time the IVUS catheter must be filled with a mixed solution of saline and heparin sodium. In the clinical use process, the water pressure is very high when the catheter is filled with the mixed solution of the physiological saline and the heparin sodium, so that the IVUS catheter has very high sealing requirement.

At present, a sealing ring is added between a proximal middle tube and an outer tube of an IVUS catheter in the market to realize sealing, and the pushing and withdrawing of the IVUS catheter are realized by dynamic movement between the proximal inner tube and the outer tube.

Disclosure of utility model

The utility model aims to provide an ultrasonic catheter structure which reduces friction force in pushing and withdrawing processes on the premise of ensuring tightness.

In order to achieve the above object, the following technical scheme is provided:

An ultrasound catheter structure comprising:

The outer tube, one end of the said outer tube has connecting pieces, the said connecting piece is fixedly connected with said outer tube;

the middle pipe is inserted into one end of the outer pipe, provided with the connecting piece, and can move along the outer pipe, the outer side of the middle pipe is sleeved with a connecting matching piece in threaded connection with the connecting piece, and the connecting matching piece is in sliding connection with the middle pipe;

One end of the inner tube is inserted into one end of the middle tube provided with the connecting matching piece, and the other end of the inner tube is positioned in the outer tube;

The first sealing piece is fixedly arranged between the middle pipe and the inner pipe, and can seal a gap between the inner pipe and the middle pipe.

As an alternative to the ultrasound catheter structure, the ultrasound catheter structure further comprises a sealing sleeve, the sealing sleeve being sleeved and clasped on the outer side of the first sealing element.

As an alternative scheme of the ultrasonic catheter structure, the ultrasonic catheter structure further comprises a sealing plug pipe, the sealing plug pipe is sleeved on the outer side of the inner pipe, a first sealing piece is arranged between the sealing plug pipe and the middle pipe, and the sealing sleeve pipe is sleeved on and tightly held on the outer side of the middle pipe, the first sealing piece and the sealing plug pipe.

As an alternative scheme of the ultrasonic catheter structure, a first sealing connection part is arranged between the sealing sleeve and the middle pipe, and the first sealing connection part can fixedly connect the sealing sleeve with the middle pipe and can seal a gap between the sealing sleeve and the middle pipe;

The sealing sleeve is provided with a first sealing connecting part, and the first sealing connecting part is used for fixedly connecting the sealing sleeve with the sealing plug pipe and sealing a gap between the sealing sleeve and the sealing plug pipe.

As an alternative to the ultrasound catheter structure, the first sealing connection is formed by curing an adhesive or a hot melt material;

The second sealing connection is formed by curing an adhesive or a hot melt material.

As an alternative to the ultrasound catheter structure, the outer diameter of the first sealing connection portion gradually decreases along the axial direction of the sealing sleeve from the middle portion of the sealing sleeve to the first sealing connection portion;

and the outer diameter of the second sealing connecting part gradually decreases along the axial direction of the sealing sleeve from the middle part of the sealing sleeve to the second sealing connecting part.

As an alternative to the ultrasound catheter structure, the sealing sleeve is a heat shrink tube.

As an alternative to the ultrasonic catheter structure, the outer diameter of the sealing plug tube is equal to the outer diameter of the middle tube.

As the alternative scheme of supersound pipe structure, the other end of well pipe is equipped with the system coupling assembling who is used for connecting ultrasonic system, system coupling assembling includes casing, sealing seat, second sealing member and rigid pipe, the one end of rigid pipe is located in the casing, the other end with well union coupling, the second sealing member cover establish and hug tightly in the outside of rigid pipe, the sealing seat set firmly in the casing, the one end of sealing seat is equipped with the seal groove, the second sealing member set firmly in the seal groove.

As an alternative to the ultrasound catheter structure, the outer diameter of the inner tube is larger than the inner diameter of the first seal;

the rigid tube has an outer diameter greater than an inner diameter of the second seal.

Compared with the prior art, the utility model has the beneficial effects that:

Compared with the prior art, the ultrasonic catheter structure has the advantages that the first sealing element is arranged between the inner tube and the middle tube, and the size of the first sealing element is reduced on the premise of ensuring the sealing performance, so that the projection area of the first sealing element on the cross section of the outer tube is reduced, the purpose of reducing the moving friction force of the middle tube in the outer tube is achieved, the pushing performance of the middle tube and the convenience in the clinical use process are greatly improved, and the risk of breakage of the middle tube is also reduced; meanwhile, the sealing structure is simple, the process is easy to realize, and the sealing effect is good.

Drawings

FIG. 1 is a schematic view of the overall structure of an ultrasound catheter structure in accordance with an embodiment of the present utility model;

FIG. 2 is a schematic view of the structure of the junction between the middle pipe and the outer pipe according to the embodiment of the present utility model;

FIG. 3 is a schematic diagram showing the connection relationship between the middle pipe and the inner pipe in the embodiment of the utility model;

Fig. 4 is a schematic structural diagram of a system connection component according to an embodiment of the present utility model.

Reference numerals:

1. An outer tube; 11. a connecting piece; 12. a proximal tube; 13. a distal sheath; 131. a catheter tip; 14. a stress relief assembly; 2. a middle tube; 21. a connecting fitting; 3. an inner tube; 4. a first seal; 5. sealing the pipe; 6. sealing the sleeve; 61. a first sealing connection; 62. a second sealing connection; 7. a system connection assembly; 71. a housing; 72. a sealing seat; 73. a second seal; 74. a rigid tube; 8. and a fluid supplementing piece.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; either mechanically or electrically. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

As shown in fig. 1 to 4, the present embodiment provides an ultrasonic catheter structure, which includes an outer tube 1, a middle tube 2, an inner tube 3 and a first sealing member 4, wherein a connecting member 11 is provided at one end of the outer tube 1, and the connecting member 11 is fixedly connected with the outer tube 1; one end of the middle tube 2 is inserted into one end of the outer tube 1 provided with the connecting piece 11 and can move along the outer tube 1, the outer side of the middle tube 2 is sleeved with a connecting matching piece 21 in threaded connection with the connecting piece 11, and the connecting matching piece 21 is in sliding connection with the middle tube 2; one end of the inner tube 3 is inserted into one end of the middle tube 2 provided with the connecting fitting piece 21, and the other end is positioned in the outer tube 1; a first sealing element 4 is fixedly arranged between the middle pipe 2 and the inner pipe 3, and the first sealing element 4 can seal a gap between the inner pipe 3 and the middle pipe 2.

Compared with the prior art, the first sealing element 4 is arranged between the inner tube 3 and the middle tube 2, and the size of the first sealing element 4 is reduced on the premise of ensuring the tightness, so that the projection area of the first sealing element 4 on the cross section of the outer tube 1 is reduced, the purpose of reducing the moving friction force of the middle tube 2 in the outer tube 1 is achieved, the pushing property of the middle tube 2 and the convenience in the clinical use process are greatly improved, and the risk of breakage of the middle tube 2 is also reduced; meanwhile, the sealing structure is simple, the process is easy to realize, and the sealing effect is good.

It should be noted that, the outer tube 1 includes a proximal tube body 12, a distal sheath tube 13 and a stress releasing assembly 14, one end of the proximal tube body 12 is connected to the connecting member 11, the other end is connected to the distal sheath tube 13 through the stress releasing assembly 14, and the other end of the distal sheath tube 13 is provided with a catheter tip 131.

In this embodiment, the ultrasonic catheter structure further includes a sealing tube 5 and a sealing sleeve 6, the sealing tube 5 is sleeved on the outer side of the inner tube 3, the first sealing member 4 is disposed between the sealing tube 5 and the middle tube 2, and the sealing sleeve 6 is sleeved on and tightly held by the middle tube 2, the first sealing member 4 and the outer side of the sealing tube 5. The sealing sleeve 6 is utilized to tightly clamp the middle pipe 2, the sealing sleeve 4 and the sealing sleeve 5, the outer ring of the first sealing element 4 can be abutted against the sealing sleeve 6, the inner ring of the first sealing element 4 is abutted against the inner pipe 3, and the inner ring and the outer ring of the first sealing element 4 are utilized to seal, so that the sealing performance is improved, and the sealing effect is better.

The outer diameter of the sealing sleeve 6 is smaller than the inner diameter of the outer tube 1, and thus the inner tube 2 is not affected to move in the outer tube 1 in the axial direction of the outer tube 1.

In other embodiments, the sealing sleeve 6 is only arranged instead of the sealing sleeve 5, the sealing sleeve 6 is sleeved and held tightly on the outer side of the first sealing element 4, and the sealing can be realized by only using the sealing sleeve 6 to fix and limit the first sealing element 4.

Optionally, a first sealing connection part 61 is arranged between the sealing sleeve 6 and the middle pipe 2, and the first sealing connection part 61 can fixedly connect the sealing sleeve 6 with the middle pipe 2 and can seal a gap between the sealing sleeve 6 and the middle pipe 2; the sealing sleeve 6 and the middle tube 2 are fixed and sealed by the first sealing connection part 61, which is beneficial to further improving the sealing performance.

Optionally, a second sealing connection part 62 is arranged between the sealing sleeve 6 and the sealing plug pipe 5, and the second sealing connection part 62 can fixedly connect the sealing sleeve 6 with the sealing plug pipe 5 and can seal a gap between the sealing sleeve 6 and the sealing plug pipe 5. The sealing sleeve 6 and the sealing plug 5 are fixed and sealed through the second sealing connecting part 62, so that the sealing performance is further improved.

Optionally, the sealing sleeve 6 is a heat shrinkage tube, and the heat shrinkage tube is utilized to shrink the sealing sleeve 5, the first sealing piece 4 and the middle tube 2 together, so that the sealing sleeve is simple in structure, easy to operate and good in sealing effect. In other embodiments, the sealing sleeve 6 can also be fixed with the sealing plug pipe 5 and the middle pipe 2 by adopting other pipes through welding or bonding.

Alternatively, the first sealing connection 61 is formed by curing with an adhesive; the second sealing connection 62 is formed by curing an adhesive. The first sealing connecting part 61 and the second sealing connecting part 62 are formed by curing the adhesive, so that the sealing requirement is met on the basis of ensuring the connection stability of the sealing sleeve 6, the middle pipe 2 and the sealing plug pipe 5. In the assembly process, a proper amount of adhesive such as glue is firstly smeared on the sealing sleeve 6, then the sealing sleeve 6 is sleeved on the outer sides of the sealing sleeve 5, the first sealing piece 4 and the middle pipe 2, and then the glue is solidified, so that the operation is convenient.

In other embodiments, the first sealing connection portion 61 may be formed by curing a heat-fusible material, and the second sealing connection portion 62 may be formed by curing a heat-fusible material. The hot-melt material includes, but is not limited to, a tube material that can be melted, and by heating the tube material to melt and apply the tube material between the sealing sleeve 6 and the middle tube 2 and between the sealing sleeve 6 and the sealing plug tube 5, and then solidifying the tube material, the first sealing connection portion 61 and the second sealing connection portion 62 can also be formed, which plays a role of improving the connection stability between the sealing sleeve 6 and the middle tube 2 and the sealing plug tube 5, and meets the sealing requirement. Illustratively, the tubing capable of being melted may be PEBAX tubing, PE tubing, or hot melt adhesive tubing.

Alternatively, the outer diameter of the first sealing connection portion 61 is gradually reduced in a direction in which the sealing sleeve 6 axially self-seals the middle portion of the sleeve 6 to the first sealing connection portion 61; the outer diameter of the second sealing connection 62 gradually decreases in the direction of the sealing sleeve 6 axially from the middle of the sealing sleeve 6 to the second sealing connection 62. This arrangement helps to further reduce the friction force when the middle tube 2 moves, and makes pushing of the middle tube 2 smoother.

Further, the outer diameter of the end, connected to the sealing sleeve 6, of the first sealing connection portion 61 is equal to the outer diameter of the sealing sleeve 6, the outer diameter of the end, connected to the sealing sleeve 6, of the second sealing connection portion 62 is equal to the outer diameter of the sealing sleeve 6, smoothness of pushing the middle tube 2 is further improved, and the first sealing connection portion 61, the second sealing connection portion 62 and the sealing sleeve 6 can be prevented from scratching the inner wall of the outer tube 1.

Optionally, the outer diameter of the inner tube 3 is larger than the inner diameter of the first sealing element 4, so that the first sealing element 4 can be ensured to hold the inner tube 3 all the time, and the tightness is improved.

Optionally, the outer diameter of the sealing plug 5 is equal to the outer diameter of the middle tube 2. By the arrangement, the arrangement of the sealing sleeve 6 is convenient, the outer diameter of the sealing sleeve 6 is unchanged, and the moving friction force of the middle pipe 2 is not increased.

Illustratively, the connecting piece 11 is a bolt, the connecting matching piece 21 is a nut, the bolt is sleeved on the outer side of the outer tube 1 and is fixedly connected with the outer tube 1, the nut is sleeved on the outer side of the middle tube 2 and is slidably connected with the middle tube 2, and when the bolt and the nut are screwed, the middle tube 2 can still move relative to the outer tube 1 along the axial direction of the outer tube 1. The outer tube 1 and the middle tube 2 are detachably connected in a bolt and nut screwed mode, so that the connection stability is high, the assembly and the disassembly are easy, and the operability is stronger. Of course, in other embodiments, nuts may be used for the connection member 11 and bolts may be used for the connection mating member 21.

Optionally, the other end of the middle tube 2 is provided with a system connecting component 7 for connecting an ultrasonic system, the system connecting component 7 comprises a shell 71, a sealing seat 72, a second sealing piece 73 and a rigid tube 74, one end of the rigid tube 74 is located in the shell 71, the other end of the rigid tube is connected with the middle tube 2, the second sealing piece 73 is sleeved and held tightly on the outer side of the rigid tube 74, the sealing seat 72 is fixedly arranged in the shell 71, one end of the sealing seat 72 is provided with a sealing groove, and the second sealing piece 73 is fixedly arranged in the sealing groove. The second sealing member 73 ensures the tightness of the system connection assembly 7, and prevents the driving mechanism of the ultrasonic system from being damaged due to the liquid entering the ultrasonic system.

Further, the ultrasonic catheter structure further comprises a liquid supplementing piece 8, one end of the liquid supplementing piece 8 is detachably connected with the middle tube 2, and the other end of the liquid supplementing piece 8 is detachably connected with the system connecting assembly 7, so that a mixed solution of normal saline and heparin sodium is conveniently introduced into the middle tube 2 through the liquid supplementing piece 8. Illustratively, the refill 8 is a three-way fitting.

For example, the sealing seat 72 may be adhered and fixed in the casing 71 by using an adhesive such as welding or glue, so that the operation is convenient.

The rigid tube 74 is illustratively a steel tube, although in other embodiments, the rigid tube 74 may be formed from other materials, as not limited herein.

Optionally, the outer diameter of the rigid tube 74 is larger than the inner diameter of the second sealing member 73, so that the holding force of the second sealing member 73 on the rigid tube 74 is further increased, and the tightness is improved.

Optionally, the first seal 4 is a sealing ring; the second seal 73 is a seal ring. The sealing ring has simple structure and low cost, is beneficial to simplifying the structure of the ultrasonic catheter and reduces the cost.

Note that the above is only a preferred embodiment of the present utility model and the technical principle applied. It will be understood by those skilled in the art that the present utility model is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, while the utility model has been described in connection with the above embodiments, the utility model is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the utility model, which is set forth in the following claims.

Claims

1. An ultrasonic catheter structure comprising:

The device comprises an outer tube (1), wherein one end of the outer tube (1) is provided with a connecting piece (11), and the connecting piece (11) is fixedly connected with the outer tube (1);

The middle pipe (2), one end of the middle pipe (2) is inserted into one end of the outer pipe (1) provided with the connecting piece (11) and can move along the outer pipe (1), a connecting matching piece (21) in threaded connection with the connecting piece (11) is sleeved on the outer side of the middle pipe (2), and the connecting matching piece (21) is in sliding connection with the middle pipe (2);

An inner pipe (3), wherein one end of the inner pipe (3) is inserted into one end of the middle pipe (2) provided with the connecting matching piece (21), and the other end of the inner pipe is positioned in the outer pipe (1);

The sealing device comprises a first sealing piece (4), wherein the first sealing piece (4) is fixedly arranged between the middle pipe (2) and the inner pipe (3), and the first sealing piece (4) can seal a gap between the inner pipe (3) and the middle pipe (2).

2. The ultrasound catheter structure according to claim 1, further comprising a sealing sleeve (6), the sealing sleeve (6) being sleeved and clasped to the outside of the first seal (4).

3. The ultrasonic catheter structure according to claim 2, further comprising a sealing tube (5), wherein the sealing tube (5) is sleeved on the outer side of the inner tube (3), the first sealing element (4) is arranged between the sealing tube (5) and the middle tube (2), and the sealing sleeve (6) is sleeved on and tightly held by the outer sides of the middle tube (2), the first sealing element (4) and the sealing tube (5).

4. An ultrasound catheter structure as claimed in claim 3, wherein a first sealing connection (61) is provided between the sealing sleeve (6) and the middle tube (2), the first sealing connection (61) being capable of fixedly connecting the sealing sleeve (6) with the middle tube (2) and sealing a gap between the sealing sleeve (6) and the middle tube (2);

The sealing sleeve (6) and the sealing plug pipe (5) are both provided with second sealing connection parts (62), and the second sealing connection parts (62) can fixedly connect the sealing sleeve (6) with the sealing plug pipe (5) and seal gaps between the sealing sleeve (6) and the sealing plug pipe (5).

5. The ultrasound catheter structure according to claim 4, wherein the first sealing connection (61) is formed by curing an adhesive or a hot melt material;

The second sealed connection (62) is formed by curing an adhesive or a hot melt material.

6. The ultrasound catheter structure according to claim 4 or 5, wherein the outer diameter of the first sealing connection (61) gradually decreases in the direction of the sealing sleeve (6) axially from the middle of the sealing sleeve (6) to the first sealing connection (61);

the outer diameter of the second sealing connection part (62) gradually decreases along the direction from the middle part of the sealing sleeve (6) to the second sealing connection part (62) along the axial direction of the sealing sleeve (6).

7. An ultrasound catheter structure according to any of claims 2 to 4, wherein the sealing sleeve (6) is a heat shrink tube.

8. An ultrasound catheter structure as claimed in claim 3, wherein the outer diameter of the sealing plug (5) is equal to the outer diameter of the middle tube (2).

9. The ultrasonic catheter structure according to claim 1, wherein the other end of the middle tube (2) is provided with a system connecting component (7) for connecting an ultrasonic system, the system connecting component (7) comprises a shell (71), a sealing seat (72), a second sealing piece (73) and a rigid tube (74), one end of the rigid tube (74) is positioned in the shell (71), the other end of the rigid tube is connected with the middle tube (2), the second sealing piece (73) is sleeved and tightly held on the outer side of the rigid tube (74), the sealing seat (72) is fixedly arranged in the shell (71), one end of the sealing seat (72) is provided with a sealing groove, and the second sealing piece (73) is fixedly arranged in the sealing groove.

10. The ultrasound catheter structure according to claim 9, wherein the outer diameter of the inner tube (3) is larger than the inner diameter of the first seal (4);

The rigid tube (74) has an outer diameter greater than an inner diameter of the second seal (73).