CN218247247U - Connecting seat and intravascular ultrasound catheter - Google Patents

Abstract

The application relates to a connecting seat and an intravascular ultrasound catheter. The connecting seat comprises a body, wherein a first cavity and a second cavity located behind the first cavity are arranged in the body, the near end of a transmission shaft can extend into the first cavity from the front end of the first cavity, the second cavity is used for mounting a rotary driving piece, the rotary driving piece is used for driving the transmission shaft to rotate, and the front end of the rotary driving piece can extend into the first cavity from the rear end of the first cavity and is connected with the near end of the transmission shaft; the sealing groove is formed in the body in the circumferential direction of the side wall of the first cavity and used for installing a sealing ring, and the sealing ring is sleeved at the front end of the rotary driving piece to prevent liquid of the first cavity from flowing into the second cavity. The scheme provided by the application can simplify the assembling process of the intravascular ultrasound catheter.

Description

Connecting seat and intravascular ultrasound catheter

Technical Field

The application relates to the technical field of medical equipment, in particular to a connecting seat and an intravascular ultrasound catheter.

Background

In the related art, the detection of the vascular lesion of a patient is usually performed by using an intravascular ultrasound catheter, the intravascular ultrasound catheter is inserted into the blood vessel of the patient, the intravascular ultrasound catheter is driven by a driving part and is detected by using an ultrasonic probe, and then an external ultrasonic diagnostic apparatus is used for imaging the condition of the vascular lesion part. The detection result of the intravascular ultrasonic imaging catheter has high accuracy and persuasion.

The proximal end of the intravascular ultrasound catheter is typically connected to the driver member by a connection hub, and an isolation seal between the catheter and the driver member is required at the connection hub to prevent egress of fluid from within the tube. When connecting seat department sealed, generally adopt to press sealing assembly through machinery and add the mode of gluing to fix on the connecting seat, this kind of assembly is complicated, the process is many, and the processing cost is high.

SUMMERY OF THE UTILITY MODEL

In order to solve or partially solve the problems in the related art, the present application provides a connection base and an intravascular ultrasound catheter, which can simplify the assembly process of the intravascular ultrasound catheter.

This application first aspect provides a connecting seat for intravascular ultrasound catheter, intravascular ultrasound catheter include the transmission shaft and with the ultrasonic probe that the distal end of transmission shaft is connected, the connecting seat includes:

the transmission shaft comprises a body, wherein a first cavity and a second cavity located behind the first cavity are arranged in the body, the near end of the transmission shaft can extend into the first cavity from the front end of the first cavity, the second cavity is used for mounting a rotary driving piece, the rotary driving piece is used for driving the transmission shaft to rotate, and the front end of the rotary driving piece can extend into the first cavity from the rear end of the first cavity and is connected with the near end of the transmission shaft;

the sealing ring is sleeved at the front end of the rotary driving piece to prevent liquid of the first cavity from flowing into the second cavity.

Furthermore, the front end of the connecting seat is provided with a through hole for the transmission shaft to pass through, and the through hole is communicated with the first cavity.

Furthermore, the connecting seat further comprises a boss arranged on the side wall of the body, a water injection port is arranged on the boss, a water injection channel is arranged in the body, the water injection port is communicated with the first cavity through the water injection channel, and the sealing groove is located between the water injection channel and the second cavity.

Furthermore, the side wall of the boss is provided with an external thread.

Further, the distance between the sealing groove and the water injection channel is smaller than the distance between the sealing groove and the second chamber.

Further, the seal groove is located at the front end of the second chamber and is communicated with the second chamber.

The utility model provides an intravascular ultrasound catheter, including the body, with the end that the distal end of body is connected, be located transmission shaft in the body, with the ultrasonic probe that the distal end of transmission shaft is connected and above-mentioned arbitrary scheme the connecting seat, the connecting seat with the near-end of body is connected, install in the seal groove the sealing washer.

Further, the pipe body comprises a telescopic sleeve pipe assembly, a supporting pipe, a first destressing pipe and a second destressing pipe;

the telescopic sleeve assembly comprises an inner pipe and an outer pipe sleeved on the inner pipe, and the outer pipe is connected with the inner pipe in a sliding manner;

the near end of the inner pipe is connected with the front end of the connecting seat, and the first stress-relief pipe is sleeved at the joint of the inner pipe and the connecting seat;

the far end of the outer pipe is connected with the supporting pipe, and the second stress-removing pipe is sleeved at the connection position of the outer pipe and the supporting pipe;

the far end of the supporting tube is connected with the end head.

Furthermore, a marking ring is arranged on the supporting tube, and a developing ring is arranged on the end head.

Furthermore, a water outlet is formed in the side wall of the far end of the supporting tube, and an inclined opening through which a guide wire passes is formed in the side wall of the near end of the end head.

The technical scheme provided by the application can comprise the following beneficial effects:

the sealing groove is formed in the circumferential direction of the side wall of the first cavity, so that the sealing ring is only mechanically clamped into the sealing groove during assembly, the sealing ring is sleeved at the front end of the rotary driving piece, liquid in the first cavity can be prevented from flowing into the second cavity to damage components, and the number of sealing parts is reduced; the glue dispensing process is not needed during assembly, the structure is simple, and the assembly is convenient.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

The foregoing and other objects, features and advantages of the application will be apparent from the following more particular descriptions of exemplary embodiments of the application as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the application.

FIG. 1 is an exploded schematic view of a seal assembly shown in the related art;

FIG. 2 is a schematic structural diagram of an intravascular ultrasound catheter shown in an embodiment of the present application;

fig. 3 is a schematic structural diagram of a connection seat according to an embodiment of the present application;

FIG. 4 is a schematic view of the connection holder and the rotary driving member shown in FIG. 3;

fig. 5 is a schematic structural diagram of a connection seat according to another embodiment of the present application;

FIG. 6 is a schematic view of the assembly of the connecting socket and the rotary driving member shown in FIG. 5;

figure 7 is an enlarged cross-sectional view of the distal end of an intravascular ultrasound catheter shown in an embodiment of the present application.

Reference numerals:

1-a connecting seat, 11-a body, 12-a first cavity, 13-a second cavity, 14-a sealing groove, 15-a via hole, 16-a boss, 17-a water injection port, 18-a water injection channel and 19-an external thread;

2-a pipe body, 21-a telescopic sleeve assembly, 211-an outer pipe, 22-a support pipe, 221-a water outlet, 23-a first destressing pipe, 24-a second destressing pipe and 25-a marking ring;

3-end, 31-bevel, 32-developing ring;

4-transmission shaft, 5-ultrasonic probe, 6-rotary driving piece, 7-sealing ring, 7' -sealing ring, 8-sealing seat, 9-sealing cover, 10-guide wire and 101-one-way valve.

Detailed Description

Embodiments of the present application will be described in more detail below with reference to the accompanying drawings. While embodiments of the present application are illustrated in the accompanying drawings, it should be understood that the present application may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

It should be understood that although the terms "first," "second," "third," etc. may be used herein to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present application. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be considered limiting of the present application.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections as well as removable connections or combinations; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In the related art, the proximal end of the intravascular ultrasound catheter is generally connected with the driving part through the connecting seat, and specifically, the driving shaft is driven to rotate through a rotary driving part arranged in the connecting seat so as to drive the ultrasound probe to rotate; it is desirable to seal the conduit from the drive member at the connection hub to prevent liquid in the conduit from flowing out and damaging the drive member. When sealing is performed at the connecting seat, a sealing assembly is usually fixed on the connecting seat in a manner of mechanically pressing and dispensing, for example, the sealing assembly shown in fig. 1 includes a sealing ring 7', a sealing seat 8 and a sealing cover 9, the sealing ring 7' needs to be clamped between the sealing seat 8 and the sealing cover 9, sealing is performed between the sealing seat 8 and the sealing cover 9 through a dispensing process, the sealing assembly is then pressed into the connecting seat, and the sealing assembly and the connecting seat are then hermetically connected through the dispensing process. The assembly mode is complex, the procedures are multiple, and the processing cost of the intravascular ultrasonic catheter is high.

In view of the above problems, embodiments of the present application provide an intravascular ultrasound catheter, which can simplify the assembly process of the intravascular ultrasound catheter.

The technical solutions of the embodiments of the present application are described in detail below with reference to the accompanying drawings.

Fig. 2 is a schematic structural view of an intravascular ultrasound catheter shown in an embodiment of the present application, and fig. 7 is an enlarged sectional view of a distal end of the intravascular ultrasound catheter shown in an embodiment of the present application.

Referring to fig. 2 and 7, the intravascular ultrasound catheter provided by the embodiment of the present application includes a tube body 2, a tip 3 connected to a distal end of the tube body 2, a transmission shaft 4 located in the tube body 2, an ultrasound probe 5 connected to a distal end of the transmission shaft 4, and a connection seat 1 connected to a proximal end of the tube body 2. The ultrasonic probe 5 is positioned in the pipe body 2, and during detection, the transmission shaft 4 is driven by the rotary driving piece 6 to rotate, so that the ultrasonic probe 5 is driven to rotate.

Referring to fig. 3 to 6, the connecting socket 1 of the embodiment of the present application includes a body 11, a first cavity 12 and a second cavity 13 located behind the first cavity 12 are provided in the body 11, a proximal end of the transmission shaft 4 can extend into the first cavity 12 from a front end of the first cavity 12, the second cavity 13 is used for mounting the rotary driving member 6, the rotary driving member 6 is used for driving the transmission shaft 4 to rotate, and a front end of the rotary driving member 6 can extend into the first cavity 12 from a rear end of the first cavity 12 and is connected to the proximal end of the transmission shaft 4. Front end and 4 fixed connection of transmission shaft of rotary driving piece 6, rotary driving piece 6 drives transmission shaft 4 when rotating and rotates to make 5 rotations of ultrasonic probe, and then can 360 survey the vascular wall.

With reference to fig. 3 to 6, a sealing groove 14 circumferentially disposed along a sidewall of the first chamber 12 is further disposed in the body 11, the sealing groove 14 is used for mounting the sealing ring 7, and the sealing ring 7 is used for being sleeved on a front end of the rotary driving member 6 to prevent the liquid in the first chamber 12 from flowing into the second chamber 13. When the intravascular detection is carried out, the liquid in the tube body 2 can flow into the first chamber 12 at the proximal end of the transmission shaft 4, and in order to prevent the liquid from flowing into the second chamber 13 from the first chamber 12 to cause the damage of the driving part, the first chamber 12 and the second chamber 13 are sealed and isolated by the sealing ring 7.

Through the connecting seat 1 in the scheme, only the sealing ring 7 needs to be mechanically clamped into the sealing groove 14 during assembly, and after the sealing ring 7 is sleeved at the front end of the rotary driving piece 6, liquid in the first cavity 12 can be prevented from flowing into the second cavity 13 to cause damage to components; thus, only one sealing ring 7 is needed for sealing, and the number of sealing parts is reduced; the assembly process does not need a dispensing procedure, the assembly steps are simplified, and the structure is simple, so that the processing cost of the intravascular ultrasound catheter is reduced.

In specific implementation, as shown in fig. 3 to 6, a through hole 15 through which the transmission shaft 4 passes is formed at the front end of the connection seat 1, the through hole 15 is communicated with the first chamber 12, the proximal end of the transmission shaft 4 passes through the through hole 15 and then is retained in the first chamber 12, and when detection is performed, liquid in the tube body 2 also flows into the first chamber 12 through the through hole 15.

In some embodiments, as shown in fig. 3 to 6, the connecting seat 1 further includes a boss 16 disposed on a side wall of the body 11, the boss 16 is provided with a water filling port 17, a water filling channel 18 is disposed in the body 11, the water filling port 17 is communicated with the first chamber 12 through the water filling channel 18, and the sealing groove 14 is located between the water filling channel 18 and the second chamber 13.

Before detection, the tube body 2 needs to be flushed with a liquid such as heparinized saline, since this provides the required acoustic coupling medium for ultrasound imaging. The flushing liquid is injected through the water injection port 17 and enters the tube body 2 after passing through the first chamber 12, thereby flushing the interior of the tube body 2, keeping the interior clean and eliminating the air inside the tube as much as possible. As shown in fig. 2, the fill port 17 may be connected to a one-way valve 101, the one-way valve 101 may be connected to a syringe, and the syringe may inject a cleaning solution into the fill port 17 through the one-way valve 101. The one-way valve 101 may also help retain the saline in the tube body 2 during use.

In some embodiments, as shown in fig. 2-6, the sidewall of boss 16 is provided with external threads 19. Through the external thread 19, the one-way valve 101 or other product accessories with luer connectors can be directly screwed on the boss 16, so that the assembly processes, such as the dispensing process when the one-way valve 101 is connected with the connecting seat 1, are reduced, and the assembly is facilitated. In other embodiments, the connection seat 1 may not be connected to the one-way valve 101, and may be directly connected to a product accessory with a luer connector, such as an extension tube, and the accessory may be flexibly used according to actual product requirements.

As shown in fig. 3 and 4, in the connection socket 1 provided in an embodiment of the present application, a distance between the sealing groove 14 and the water filling channel 18 is smaller than a distance between the sealing groove 14 and the second chamber 13, that is, the sealing groove 14 is disposed closer to the water filling channel 18, so that the water storage amount of the first chamber 12 is smaller, and the sealing effect is better.

As shown in fig. 5 and 6, in the connection socket 1 according to another embodiment of the present invention, a sealing groove 14 is located at a front end of the second chamber 13 and is communicated with the second chamber 13. Therefore, the connecting seat 1 is convenient to open the die when injection molding is adopted, and is easy to process. Certainly, the connecting seat 1 can also be formed by machining, 3D printing and other modes, and the material of the connecting seat 1 can be polymer plastic or metal and the like.

The sealing ring 7 can be an annular sealing ring 7 or a Y-shaped sealing ring 7, and when the sealing ring 7 is the Y-shaped sealing ring 7, the lip of the Y-shaped sealing ring 7 is opened by the liquid injected into the pipe body 2, so that the sealing ring 7 is tightly attached to the wall of the sealing groove 14, and the sealing performance is enhanced.

In some embodiments, as shown in fig. 2, the tubular body 2 comprises a telescopic sleeve assembly 21, a support tube 22, a first distressed tube 23 and a second distressed tube 24. The telescopic tube assembly 21 includes an inner tube (not shown in the figure) and an outer tube 211 sleeved on the inner tube, the outer tube 211 is slidably connected to the inner tube, the distal end of the inner tube can slide back and forth along the axial direction of the outer tube 211 inside the outer tube 211, and the connection seat 1 is connected to the support tube 22 through the telescopic tube assembly 21. At the time of detection, a retraction unit (not shown in the drawings) can drive the transmission shaft 4 to move towards the proximal retraction through the telescopic tube assembly 21, and during the movement, the transmission shaft 4 rotates to make the ultrasonic probe 5 perform rotary detection. Specifically, the withdrawing unit clamps the outer tube 211, and then drives the connecting seat 1 to drive the inner tube to slide relative to the outer tube 211, thereby driving the transmission shaft 4 to move.

The near end of the inner tube is connected with the front end of the connecting seat 1, the first destressing tube 23 is sleeved at the joint of the inner tube and the connecting seat 1, and the first destressing tube 23 is used for eliminating stress concentration generated between the inner tube and the connecting seat 1 and preventing bending. The far end of outer tube 211 is connected with stay tube 22, and the junction of outer tube 211 and stay tube 22 is located to second destressing pipe 24 cover, and second destressing pipe 24 is used for eliminating the stress concentration that produces between outer tube 211 and the stay tube 22, prevents to buckle. Both the first and second stress relief tubes 23, 24 may be made of a softer resin material. The distal end of the support tube 22 is connected to the tip 3, and the support tube 22 moves the tip 3.

In some embodiments, as shown in fig. 2 and 7, to mark the position of the shaft within the body, a marker ring 25 is provided on the support tube 22 and a developer ring 32 is provided on the tip 3. Specifically, the support tube 22 may be provided with a marker ring 25 at a distance of 90cm and 100cm from the distal end of the tube body 2, respectively, for indicating the insertion depth and helping to estimate the position of the intravascular ultrasound catheter relative to the distal end of the guiding catheter; wherein the guiding catheter is another tube, and the supporting tube 22 extends into the guiding catheter and moves along the guiding catheter to make the ultrasonic catheter enter the coronary artery of the heart during diagnosis. The visualization ring 32 is disposed 0.5mm from the distal end of the tip 3, the visualization ring 32 is radiopaque for identifying the location of the distal end of the ultrasound catheter, and the radiopaque visualization ring 32 and the marker ring 25 visualize the location of the visualization ring 32 and the marker ring 25 under X-ray.

In some embodiments, as shown in fig. 7, the distal sidewall of the support tube 22 is provided with a water outlet 221, and the proximal sidewall of the tip 3 is provided with a bevel 31 for the guide wire 10 to pass through. The liquid injected into the tube body 2 can flow out from the water outlet 221. The bevel 31 is about 1.6cm from the distal end of the tip 3 and the guidewire 10 is exchanged at the bevel 31.

To sum up, this application embodiment provides an intravascular ultrasound catheter, only need during the assembly with sealing washer 7 mechanical block advance in seal groove 14, can prevent to cause the damage of components and parts in the liquid inflow second chamber 13 of first chamber 12 behind the front end that rotary driving piece 6 was located to sealing washer 7 cover, has reduced the quantity of sealed part, assembly process is simple. The side wall of the boss 16 is provided with external threads 19, so that the one-way valve 101 or other product accessories with luer connectors can be directly and mechanically screwed. The coupling hub 1 is not limited to use with IVUS catheters, but may also be used with OCT catheters, NIRS catheters, and other imaging catheters having a proximal telescoping assembly.

The aspects of the present application have been described in detail hereinabove with reference to the accompanying drawings. In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments. Those skilled in the art should also appreciate that the acts and modules referred to in the specification are not necessarily required for the application. In addition, it can be understood that the steps in the method of the embodiment of the present application may be sequentially adjusted, combined, and deleted according to actual needs, and the modules in the device of the embodiment of the present application may be combined, divided, and deleted according to actual needs.

Having described embodiments of the present application, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims (10)

1. A connection hub for an intravascular ultrasound catheter comprising a drive shaft and an ultrasound probe connected to a distal end of the drive shaft, the connection hub comprising:

the transmission shaft comprises a body, wherein a first cavity and a second cavity behind the first cavity are arranged in the body, the near end of the transmission shaft can extend into the first cavity from the front end of the first cavity, the second cavity is used for mounting a rotary driving piece, the rotary driving piece is used for driving the transmission shaft to rotate, and the front end of the rotary driving piece can extend into the first cavity from the rear end of the first cavity and is connected with the near end of the transmission shaft;

the sealing ring is sleeved at the front end of the rotary driving piece to prevent liquid of the first cavity from flowing into the second cavity.

2. The connector receptacle of claim 1, wherein:

the front end of the connecting seat is provided with a through hole for the transmission shaft to pass through, and the through hole is communicated with the first cavity.

3. The connector receptacle of claim 1, wherein:

still including locating boss on the body lateral wall, be equipped with the water filling port on the boss, this internal water filling channel that is equipped with, the water filling port passes through water filling channel with first cavity intercommunication, the seal groove is located water filling channel with between the second cavity.

4. The connector receptacle of claim 3, wherein:

the side wall of the boss is provided with external threads.

5. The connector receptacle of claim 3, wherein:

the distance between the sealing groove and the water injection channel is smaller than the distance between the sealing groove and the second cavity.

6. The connector receptacle of claim 3, wherein:

the seal groove is located at the front end of the second chamber and communicated with the second chamber.

7. An intravascular ultrasound catheter, comprising:

the connecting seat of any one of claims 1 to 6, the connecting seat being connected to the proximal end of the tube body, the sealing groove having the sealing ring mounted therein.

8. The intravascular ultrasound catheter of claim 7, wherein:

the pipe body comprises a telescopic sleeve pipe assembly, a supporting pipe, a first distressing pipe and a second distressing pipe;

the telescopic sleeve assembly comprises an inner pipe and an outer pipe sleeved on the inner pipe, and the outer pipe is connected with the inner pipe in a sliding manner;

the near end of the inner pipe is connected with the front end of the connecting seat, and the first stress relieving pipe is sleeved at the connecting part of the inner pipe and the connecting seat;

the far end of the outer pipe is connected with the supporting pipe, and the second stress-removing pipe is sleeved at the connection position of the outer pipe and the supporting pipe;

the far end of the supporting tube is connected with the end head.

9. The intravascular ultrasound catheter of claim 8, wherein:

the supporting tube is provided with a marking ring, and the end head is provided with a developing ring.

10. The intravascular ultrasound catheter of claim 8, wherein:

the far-end side wall of the supporting tube is provided with a water outlet, and the near-end side wall of the end is provided with an inclined opening for the guide wire to pass through.

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