CN215079283U

CN215079283U - Miniature catheter capable of necking and bending

Info

Publication number: CN215079283U
Application number: CN202120478798.6U
Authority: CN
Inventors: 李敬伟; 董海林; 叶永红; 徐运; 罗云
Original assignee: Nanjing Drum Tower Hospital
Current assignee: Shanghai Xinwei Medical Technology Co ltd
Priority date: 2021-03-05
Filing date: 2021-03-05
Publication date: 2021-12-10
Anticipated expiration: 2031-03-05

Abstract

The utility model discloses a little pipe that can throat, adjustable bend belongs to medical instrument technical field, including being used for carrying support or brain protection device to the pipe body at the internal vascular position of patient, the pipe body includes the body of head end, near-end and connecting head end and near-end. The utility model discloses in, utilize each handle to operate the tractor to receive and release the pull wire that links to each other with each handle, and under pulling of pull wire, control each blade swing, can make the head end can turn to towards the anticipated direction according to the demand, thereby make the pipe in the human intravascular free nimble propelling movement of many forks of bending, reach the target position. In addition, also can be under a plurality of handles simultaneous operation, the synchronous inside structure that draws in of body one end is kept away from to control a plurality of blades constitutes the toper head end, and it is big to solve the pipe external diameter, and the trafficability characteristic is poor and easily scrapes the problem of thrombus on the vascular wall, improves the functional and the reliability of device, and simple structure, the flexible operation, convenient to use.

Description

Miniature catheter capable of necking and bending

Technical Field

The utility model relates to the technical field of medical equipment, in particular to a miniature catheter which can be contracted and bent.

Background

The microcatheter is used for delivering a stent, a coil, a stent or a brain protection device to a vascular part in a patient body, and during the opening process of the cerebral artery acute occlusion, the distal embolism protection is still blank, but once the distal embolism occurs, the health of the patient is seriously damaged. The protection device on the existing market is a self-contained delivery catheter, can not be delivered through a microcatheter, the outer diameter of the catheter is large, the trafficability characteristic is poor, the device can not be used for opening protection of acute aortic occlusion, the head end of the catheter is flat, thrombus on the vascular wall is easily scraped off, the device can enter the far end of a nerve vessel, and the far end of the vessel is blocked to form a cerebral infarction.

SUMMERY OF THE UTILITY MODEL

The utility model provides a can throat, little pipe of adjustable bending solve the pipe among the prior art, the head end is level and smooth, scrapes the thrombus on the vascular wall easily, causes distal end vascular blockage, forms the cerebral infarction, and can't carry out crooked problem according to the blood vessel is nimble.

In order to achieve the above object, the utility model provides a following technical scheme: a neckable, bendable microcatheter comprising a catheter body for delivering a stent or brain protection device to a vascular site in a patient, the catheter body comprising a head end, a proximal end, and a tube connecting the head end and the proximal end;

the head end comprises a plurality of independently openable blades, and each blade is internally provided with a coil pipe;

the proximal end comprises a retractor and a plurality of handles which are uniformly arranged on the edge of the retractor and are used for operating the retractor;

a plurality of traction wires are uniformly distributed in the pipe body along the axial direction of the pipe body and at positions corresponding to the blades, wherein the traction wires are arranged in the pipe body;

each the pull wire is used for connecting corresponding snake and handle, operates each the handle, control the tractor pulls each pull wire, drives each the snake shrink or expand, the swing of the blade that the control corresponds.

Preferably, the tractor is including installing the body is kept away from the ring of head end one end, in the ring with each the handle corresponds position department and all installs the nut, the screw rod is installed in the nut inner gearing, screw rod one end is stretched out the ring, and with the handle links to each other, the handle rotates, drives the screw rod rotates, the screw rod other end with the pull wire links to each other, the screw rod rotates, is used for receiving and releasing the pull wire.

Preferably, a first guide pipe and a second guide pipe which are parallel to each other are uniformly arranged in the pipe body along the axis direction of the pipe body and at the corresponding positions of the coil pipes, wherein two ends of each coil pipe are respectively connected with the same ends of the first guide pipe and the second guide pipe, one end of the traction wire is connected with the screw rod, and the other end of the traction wire is connected with the nut after sequentially passing through the first guide pipe, the coil pipe and the second guide pipe.

Preferably, the pipe body comprises an inner pipe, a middle pipe and an outer pipe from inside to outside, each first guide pipe is located on the inner wall of the inner pipe, and each second guide pipe is located between the inner pipe and the middle pipe.

Preferably, the coil, the first guide tube and the second guide tube are all stainless steel members.

Preferably, one end of each blade, which is far away from the pipe body, is folded to form a conical head end.

Preferably, the number of the blades, the first guide pipe and the second guide pipe of the coil pipe and the number of the handles are four.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses in, utilize each handle to operate the tractor, thereby receive and release the pull wire that links to each other with each handle, and under pulling of pull wire, control each blade swing, can make the head end can turn to towards the anticipated direction according to the demand, thereby make the pipe in the human intravascular free nimble propelling movement of bending many forks, reach the target position, in addition, also can be under a plurality of handle simultaneous operation, control a plurality of blades and keep away from body one end and inwards draw in step and constitute the toper head end, it is big to solve the pipe external diameter, the problem that the trafficability characteristic is poor and easily scrapes the thrombus on the vascular wall, the functional and the reliability of improving the device, and simple structure, the flexible operation, high durability and convenient use.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention.

In the drawings:

FIG. 1 is a schematic view of the structure of the microcatheter of the present invention;

fig. 2 is a schematic structural view of the proximal end of the present invention;

FIG. 3 is a schematic view of the retractor and the pull wire of the present invention;

FIG. 4 is a schematic view of the structure of the present invention in which the coil pipe is connected to the guide pipe;

FIG. 5 is a schematic view of the tip of the micro-catheter of the present invention in a tapered configuration;

fig. 6 is a schematic structural view of the tip of the microcatheter of the present invention in a bent state;

reference numbers in the figures: 1. a head end; 11. a blade; 12. a coil pipe; 2. a proximal end; 21. a retractor; 21-1, a circular ring; 21-2, a nut; 21-3, a screw; 22. a handle; 3. a pipe body; 31. an inner layer tube; 32. a middle-layer pipe; 33. an outer tube; 4. a pull wire; 5. a first guide tube; 6. a second guide tube.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.

Example (b): as shown in figure 1, a micro-catheter capable of necking and bending, which comprises a catheter body used for conveying a stent or a brain protection device to a vascular part in a patient body, wherein the catheter body comprises a head end, a near end, a pipe body connected with the head end and the near end, the head end comprises a plurality of independently openable blades, a snake pipe is arranged in each blade, the near end comprises a tractor and a plurality of handles which are uniformly arranged on the edge of the tractor and used for operating the tractor, a plurality of traction wires are uniformly arranged in the pipe body along the axial direction of the pipe body and correspond to the blades, each traction wire is used for connecting the corresponding snake pipe and the corresponding handle, each handle is operated, the tractor is controlled to pull each traction wire, each snake pipe is driven to contract or expand, and the corresponding blades are controlled to swing.

As shown in figure 2, the retractor comprises a ring arranged at one end of a tube body far away from the head end, nuts are arranged at positions corresponding to each handle in the ring, a screw rod is arranged in the nut in an engaged manner, one end of the screw rod extends out of the ring and is connected with the handle, the handle rotates to drive the screw rod to rotate, the other end of the screw rod is connected with the traction line, the screw rod rotates to receive and release the traction line, the tube body comprises an inner tube, a middle tube and an outer tube from inside to outside, in the embodiment, a first guide tube and a second guide tube which are parallel to each other are uniformly arranged in the tube body along the axial direction and correspond to each coil tube, as shown in figures 3-4, two ends of each coil tube are respectively connected with the same ends of the first guide tube and the second guide tube, each first guide tube is arranged at the inner wall of the inner tube, each second guide tube is arranged between the inner tube and the middle tube, one end of the traction line is connected with the screw rod, the other end of the coil pipe sequentially passes through the first guide pipe, the coil pipe and the second guide pipe and then is connected with the nut, wherein the coil pipe, the first guide pipe and the second guide pipe are all members made of stainless steel materials, and the coil pipe is formed by laser shearing;

as shown in FIG. 1, in the present embodiment, the number of the blades, the first and second guide tubes of the coil, and the handles are four;

when the multifunctional spiral pipe is used, as shown in fig. 5, one end of each blade, which is far away from the pipe body, is folded to form a conical head end, the specific operation process is that one of the handles is rotated to control the screw rod to rotate, wherein one end of the traction wire is connected with the nut and is fixed without understanding, and the other end of the traction wire rotates along with the screw rod to pull the traction wire, so that the traction wire generates a pulling force towards the near-end direction, pulls the coil to contract and is folded towards the center of the pipe body;

as shown in fig. 6, one of the handles can be operated to apply force to one of the serpentines through the traction wire, the serpentines are contracted to control the corresponding blades to swing towards one direction, so that the head end can turn towards the expected direction, and the catheter can be freely and flexibly pushed in a multi-branch blood vessel bent in a human body to reach a target part, the operation is simple and flexible, and the head end can be controlled to bend towards the appointed direction according to requirements.

After the work is finished, the handle is rotated to reset the screw rod and the traction wire, and under the elastic action of the coil pipe, the blades are automatically driven to reset.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A neckable, bendable microcatheter comprising a catheter body for delivering a stent or brain protection device to a vascular site in a patient, wherein the catheter body comprises a head end, a proximal end, and a tube connecting the head end and the proximal end;

2. A neckable, adjustable bend microcatheter as in claim 1, wherein: the tractor is including installing the body is kept away from the ring of head end one end, in the ring with each the handle corresponds position department and all installs the nut, the screw rod is installed in the nut inner gearing, screw rod one end is stretched out the ring, and with the handle links to each other, the handle rotates, drives the screw rod rotates, the screw rod other end with the pull wire links to each other, the screw rod rotates, is used for receiving and releasing the pull wire.

3. A neckable, adjustable bend microcatheter as in claim 2, wherein: the inner side of the pipe body is provided with a first guide pipe and a second guide pipe which are parallel to each other along the axis direction of the pipe body and are uniformly distributed at the corresponding positions of the coil pipes, wherein the two ends of each coil pipe are respectively connected with the same ends of the first guide pipe and the second guide pipe, one end of the traction wire is connected with the screw rod, and the other end of the traction wire is connected with the nut after sequentially passing through the first guide pipe, the coil pipe and the second guide pipe.

4. A neckable, adjustable bend microcatheter as in claim 3, wherein: the pipe body comprises an inner pipe, a middle pipe and an outer pipe from inside to outside, the first guide pipes are located on the inner wall of the inner pipe, and the second guide pipes are located between the inner pipe and the middle pipe.

5. A neckable, adjustable bend microcatheter as in claim 3, wherein: the coil pipe, the first guide pipe and the second guide pipe are all members made of stainless steel materials.

6. A neckable, adjustable bend microcatheter as in claim 1, wherein: one end of each blade, which is far away from the pipe body, is folded to form a conical head end.

7. A neckable, adjustable bend microcatheter as in claim 1, wherein: the number of the blades, the first guide pipe and the second guide pipe of the coil pipe and the number of the handles are four.