CN219614699U

CN219614699U - Two-side asymmetric eccentric expandable balloon catheter

Info

Publication number: CN219614699U
Application number: CN202223528740.1U
Authority: CN
Inventors: 吴志华
Original assignee: Shangji Medical Technology Zhejiang Co ltd
Current assignee: Shangji Medical Technology Zhejiang Co ltd
Priority date: 2022-12-29
Filing date: 2022-12-29
Publication date: 2023-09-01
Anticipated expiration: 2032-12-29

Abstract

The utility model discloses a balloon catheter with asymmetric eccentric expansions on two sides. The connecting piece comprises a tail cap joint, a connecting piece, a joint, an outer tube, an inner tube and a supporting wire, wherein one end of the connecting piece is connected with the tail cap joint, the other end of the connecting piece is connected with the joint, and a sheath is arranged outside the end of the connecting piece; one end of the outer tube is an open end and is connected with the joint, the other end of the outer tube is a blind hole end and is provided with one or two eccentric expandable elliptical sacs which are asymmetric eccentric ellipses, and the end of the outer tube is provided with a plurality of through holes communicated with the eccentric expandable elliptical sacs; the inner tube is positioned in the outer tube, one end of the inner tube extends out of the connecting piece and then is in close contact with the tail cap joint, and the other end of the inner tube extends to a position close to the eccentric expandable elliptical cyst; the support wire is positioned in the inner tube, one end of the support wire is fixed in the tail cap joint, and the other end of the support wire is tightly contacted with the bottom of the blind hole end of the outer tube. The utility model has the advantages of convenient adjustment of the direction opening space and the directional position of the formed vertebral body.

Description

Two-side asymmetric eccentric expandable balloon catheter

Technical Field

The utility model relates to a balloon catheter for vertebral body expansion, in particular to a balloon catheter with asymmetric eccentric expansion on two sides.

Background

In percutaneous vertebroplasty, the balloon dilation catheter is a matched instrument for forming a channel, recovering the height of a vertebral body and forming a bone cement filling cavity in minimally invasive operations such as percutaneous vertebroplasty and vertebroplasty, and the cavity can be formed in a fracture collapsed vertebral body.

The balloon of the existing balloon dilation catheter is in a symmetrical regular shape, but the collapsed vertebral body of the fracture is not in a left-right or up-down symmetrical regular shape, after the balloon in the regular shape is inflated, the space which is expanded towards each direction is the same, the space which is actually required to be expanded by the vertebral body is usually in an irregular shape, and thus the space which is expanded by the balloon cannot meet the requirement of the space which is actually required to be expanded by the vertebral body, and directional expansion cannot be realized. And only one balloon of the existing balloon dilation catheter is needed, when medical staff needs to dilate two places, the balloon is usually required to be dilated at one place, then the balloon is deflated, and the balloon dilation catheter is moved to the second place to perform the same operation, so that the operation difficulty is objectively increased, the operation time is increased, the pain of a patient is increased, and the operation quality is reduced.

Disclosure of Invention

The utility model aims to solve the technical problem of providing the two-side asymmetric eccentric expandable balloon catheter which can conveniently adjust the direction expanding space and the direction position of the formed vertebral body.

The utility model solves the problems by adopting the following technical scheme: the dilating saccule catheter comprises a tail cap joint and a connecting piece, and is structurally characterized by further comprising a joint, an outer tube, an inner tube and a supporting wire, wherein one end of the connecting piece is connected with the tail cap joint, the other end of the connecting piece is connected with the joint, and a sheath is arranged at the end of the connecting piece; one end of the outer tube is an open end and is connected with the joint, the other end of the outer tube is a blind hole end and is provided with one or two eccentric expandable elliptical sacs which are asymmetric eccentric ellipses, and the end of the outer tube is provided with a plurality of through holes communicated with the eccentric expandable elliptical sacs; the inner tube is positioned in the outer tube, one end of the inner tube extends out of the connecting piece and then is in close contact with the tail cap joint, and the other end of the inner tube extends to a position close to the eccentric expandable elliptical cyst; the support wire is positioned in the inner tube, one end of the support wire is fixed in the tail cap joint, and the other end of the support wire is tightly contacted with the bottom of the blind hole end of the outer tube.

The sheath is in a conical tubular shape and is in threaded connection with the connecting piece.

The connector is in a conical tubular shape, one end of the connector is arranged in the connecting piece, and the connector is in interference fit connection with the connecting piece; the other end of the pipe is positioned in the outer pipe, and the joint is in interference fit connection with the outer pipe; and a second sealing ring is arranged at the joint of the joint and the connecting piece.

The end of the outer tube connected with the joint is a horn-shaped open end, and the size and shape of the open end are matched with those of the joint.

The tail cap joint is in threaded connection with the connecting piece, and a first sealing ring is arranged in the tail cap joint.

The surface of the outer tube is provided with limit marks.

The outer tube of the utility model is provided with a developing ring on the surface of the outer tube which is positioned in the eccentric expandable elliptical cyst body.

The tail cap joint is round head or flat head.

Compared with the prior art, the utility model has the following beneficial effects: 1. the joint of the balloon catheter is designed into a conical tubular shape, one end of the outer tube connected with the joint is designed into a horn-shaped opening end, one end of the joint is positioned in the outer tube and is in interference fit connection, and the contact area of the joint and the joint of the outer tube is increased due to the conical tubular shape and the horn-shaped design, so that the joint is firmer and more reliable and is not easy to damage; 2. the eccentric expandable elliptical balloon of the balloon catheter is designed into an asymmetric eccentric ellipse, and the eccentric expandable elliptical balloon takes an outer tube as the center after being expanded, presents a shape with one large side and one small side, so that cavities with different sizes are formed in the vertebral body through directional expansion, the fracture collapsed vertebral body or the central area of the injured vertebral body can be pressurized in a directional manner, the effective eccentric expansion and expansion can be achieved under the condition that the abduction angle is not increased, an asymmetric elliptical cavity is formed, the eccentric directional expansion can be realized, the local stress between adjacent segments and adjacent end plates can be increased, the influence on the adjacent vertebral bodies can be reduced, and the treatment effect of bilateral puncture can be achieved through unilateral puncture expansion; 3. when the eccentric expandable elliptical balloon of the balloon catheter is two eccentric elliptical balloons, the balloon catheter is suitable for the situation that a large space needs to be expanded in the vertebral body or two places need to be expanded, the requirement can be met by only one operation, pain can be relieved rapidly, the vertebral body height can be restored, the same operation is not needed to be repeated after the balloon is deflated and withdrawn, the operation difficulty is reduced, and the operation time is shortened.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1 of the present utility model.

Fig. 2 is a cross-sectional view of fig. 1.

Fig. 3 is an enlarged view at a of fig. 2.

Fig. 4 is an enlarged view at B of fig. 2.

Fig. 5 is a schematic structural diagram of the present utility model when the protection sleeve is used in combination with embodiment 1.

Fig. 6 is a view showing the state of use of example 1 of the present utility model (when the eccentric expandable elliptical balloon is not deployed).

Fig. 7 is a view showing the state of use (when the eccentric expandable elliptical balloon is opened) of example 1 of the present utility model.

Fig. 8 is a schematic structural diagram of embodiment 2 of the present utility model.

Fig. 9 is a cross-sectional view of fig. 8.

Fig. 10 is an enlarged view at C of fig. 9.

Fig. 11 is an enlarged view at D of fig. 9.

Fig. 12 is a schematic structural diagram of the present utility model in combination with a protective sleeve according to embodiment 2.

Fig. 13 is a view showing the state of use (when the eccentric expandable elliptical balloon is not deployed) of example 2 of the present utility model.

Fig. 14 is a view showing the use state of example 2 of the present utility model (when the eccentric expandable elliptical balloon is opened).

Detailed Description

Example 1:

referring to fig. 1-4, the present embodiment includes a tail cap connector 1, a connector 3, a connector 9, an outer tube 6, an inner tube 8 and a support wire 7, the tail cap connector 1 being a flat head.

One end of the connecting piece 3 is connected with the tail cap joint 1, the connecting piece 3 is in threaded connection with the tail cap joint 1, and a first sealing ring 2 is arranged in the tail cap joint 1; the other end of the connecting piece 3 is connected with the joint 9, a sheath 5 is arranged outside the end, the sheath 5 and the joint 9 are in a conical tubular shape, and the sheath 5 is in threaded connection with the connecting piece 3; one end of the joint 9 is arranged in the connecting piece 3, the joint 9 is in interference fit connection with the connecting piece 3, and a second sealing ring 4 is arranged at the joint of the joint 9 and the connecting piece 3; one end of the outer tube 6 is a horn-shaped opening end, the other end of the outer tube 6 is a blind hole end, the size and shape of the opening end of the outer tube 6 are matched with those of the joint 9, the opening end is connected with the other end of the joint 9, the joint 9 is positioned in the outer tube 6, and the joint 9 is in interference fit connection with the outer tube 6; the blind hole end of the outer tube 6 is provided with an eccentric expandable elliptical balloon 10, the eccentric expandable elliptical balloon 10 is in an asymmetric eccentric ellipse, and the end is provided with a plurality of through holes 13 communicated with the eccentric expandable elliptical balloon 10. The inner tube 8 is positioned within the outer tube 6 and has one end extending beyond the connector 3 into close contact with the tail cap fitting 1 and the other end extending to a position adjacent to the eccentrically expandable elliptical balloon 10. The supporting wire 7 is positioned in the inner tube 8, one end of the supporting wire is fixed in the tail cap joint 1, and the other end of the supporting wire is tightly contacted with the bottom of the blind hole end of the outer tube 6.

Three limit marks 11 are arranged on the surface of the outer tube 6. The outer tube 6 is provided with two developing rings 12 at its surface at a position within the eccentrically expandable elliptical balloon 10.

The eccentrically-expandable elliptical balloon 10 is asymmetrically bonded to the outer tube 6 by a one-shot forming process. The eccentric expandable elliptical balloon 10 is made of high molecular materials such as polyurethane, polycarbonate and the like, and the materials have the biomechanical properties of good tissue compatibility, no magnetism and long-term stability, and have no influence on CT and MRI scanning. The supporting wire 7 is made of 06Cr19Ni10 material conforming to the GB1220 standard.

In use, referring to fig. 5-7, one end of the eccentric expandable elliptical balloon 10 of the balloon catheter is inserted into the protective sleeve 14 as a working channel, then the bypass channel 31 of the connecting piece 3 is communicated with the medical balloon pressurizing pump through the three-way valve, the medical balloon pressurizing pump introduces the expanding solution into the bypass channel 31 of the connecting piece 3, then the expanding solution enters the main channel 32 of the connecting piece 3 along the arrow direction shown in fig. 3 and 4, then enters the gap channel between the inner tube 8 and the joint 9, and finally enters the eccentric expandable elliptical balloon 10 through the through hole 13, and the eccentric expandable elliptical balloon 10 is expanded. After the eccentric expandable elliptical balloon 10 is expanded to a proper size, the eccentric expandable elliptical balloon 10 is kept in an expanded state for a period of time, then the tail cap joint 1 is twisted open, the tail cap joint 1 and the supporting wire 7 are taken out of the balloon catheter together, the expanding solution in the eccentric expandable elliptical balloon 10 is slowly extracted from the end, finally the balloon catheter is withdrawn, bone cement is injected into the cavity of the expanded vertebral body, the vertebral body is recovered to a high level, and the reconstruction operation is completed. If necessary, the eccentric expandable elliptical balloon 10 can be introduced into the vertebral body through the pedicle of one side by adopting a double-side alternative expansion mode, after the compression expansion is finished, the other side is expanded until the expansion is satisfied, and then the eccentric expandable elliptical balloon 10 is pumped out and taken out.

In the use process, the limit mark 11 and the developing ring 12 are used for correctly judging the exact puncture position of the balloon catheter, so that the eccentric expandable elliptical balloon 10 can smoothly reach the affected part. The three limit marks 11 on the surface of the outer tube 8 are used for graduation: during the process of inserting the outer tube 8 into the protective sleeve 14, when the first graduation marks close to the eccentric expandable elliptical balloon 10 reach the entrance of the protective sleeve 14, the eccentric expandable elliptical balloon 10 is marked to be just completely still in the protective sleeve 14; when the second graduation marks near the eccentrically-expandable elliptical balloon 10 reach the entrance of the protective sleeve 14, it is indicated that the eccentrically-expandable elliptical balloon 10 is passing through the protective sleeve 14; when the third graduation mark near the eccentrically-expandable elliptical balloon 10 reaches the entrance of the protective sleeve 14, it is identified that the eccentrically-expandable elliptical balloon 10 has just completely penetrated the protective sleeve 14.

The eccentric expandable elliptical balloon 10 which is in an asymmetric eccentric ellipse shape expands after being punctured into the vertebral body after fracture collapse, the eccentric expandable elliptical balloon 10 takes the outer tube 6 as the center, takes the shape of one large side and one small side, and can be provided with the upper side which is larger than the lower side or the upper side which is smaller than the lower side, so that cavities with different sizes can be expanded in different directions of the vertebral body, the central area of the fracture collapsed vertebral body or the injured vertebral body can be pressurized in an oriented manner during expansion, the effective eccentric expansion and expansion can be achieved under the condition that the abduction angle is not increased, an asymmetric elliptical cavity is formed, and the eccentric directional expansion can be realized. Considering that the expansion range is dependent on the specific pathological vertebral body of the patient and can be specifically changed according to the size of the area to be treated, when the eccentric expandable elliptical balloon 10 is manufactured, the maximum expansion range of the pathological vertebral body of the patient is the expansion limit which is reached by the eccentric expandable elliptical balloon 10.

Example 2:

referring to fig. 8-14, the tail cap joint 1 of the present embodiment is a round head, and the blind hole end of the outer tube 6 is provided with two adjacent eccentric expandable elliptical bladders 10. The other structures and the use method are the same as those of embodiment 1, and will not be described again.

The two eccentric expandable elliptical capsules 10 are suitable for use in situations where a large space is required to be expanded in a vertebral body or where two places are required to be expanded, the requirements can be met by only one operation without repeating the same operation.

Claims

1. The utility model provides a but both sides asymmetry eccentric expansion sacculus pipe, includes tail cap joint (1) and connecting piece (3), characterized by: the tail cap connector is characterized by further comprising a connector (9), an outer tube (6), an inner tube (8) and a supporting wire (7), wherein one end of the connecting piece (3) is connected with the tail cap connector (1), the other end of the connecting piece is connected with the connector (9), and a sheath (5) is arranged outside the end; one end of the outer tube (6) is an open end and is connected with the joint (9), the other end of the outer tube is a blind hole end and is provided with one or two eccentric expandable elliptical sacs (10), the eccentric expandable elliptical sacs (10) are in asymmetric eccentric ellipses, and the end of the outer tube is provided with a plurality of through holes (13) communicated with the eccentric expandable elliptical sacs (10); the inner tube (8) is positioned in the outer tube (6), one end of the inner tube extends out of the connecting piece (3) and then is in close contact with the tail cap joint (1), and the other end of the inner tube extends to a position close to the eccentric expandable elliptical cyst body (10); the supporting wire (7) is positioned in the inner tube (8), one end of the supporting wire is fixed in the tail cap joint (1), and the other end of the supporting wire is tightly contacted with the bottom of the blind hole end of the outer tube (6).

2. The two-sided asymmetric eccentrically-expandable balloon catheter of claim 1, wherein: the sheath (5) is in a conical tubular shape and is in threaded connection with the connecting piece (3).

3. The two-sided asymmetric eccentrically-expandable balloon catheter of claim 1, wherein: the connector (9) is in a conical tubular shape, one end of the connector is arranged in the connecting piece (3), and the connector (9) is in interference fit connection with the connecting piece (3); the other end of the pipe is positioned in the outer pipe (6), and the joint (9) is in interference fit connection with the outer pipe (6); and a second sealing ring (4) is arranged at the joint of the joint (9) and the connecting piece (3).

4. The two-sided asymmetric eccentrically-expandable balloon catheter of claim 3, wherein: the outer tube (6) is provided with a horn-shaped opening end at the end connected with the joint (9), and the opening end is matched with the joint (9) in size and shape.

5. The two-sided asymmetric eccentrically-expandable balloon catheter of claim 1, wherein: the tail cap joint (1) is in threaded connection with the connecting piece (3), and a first sealing ring (2) is arranged in the tail cap joint (1).

6. The two-sided asymmetric eccentrically-expandable balloon catheter of claim 1, wherein: the surface of the outer tube (6) is provided with limit marks (11).

7. The two-sided asymmetric eccentrically-expandable balloon catheter of claim 1, wherein: the outer tube (6) is provided with a developing ring (12) on the surface thereof at a position within the eccentric expandable elliptical balloon (10).

8. The two-sided asymmetric eccentrically-expandable balloon catheter of claim 1, wherein: the tail cap joint (1) is round head or flat head.