CN215875890U

CN215875890U - Tip-controllable microcatheter and kit

Info

Publication number: CN215875890U
Application number: CN202021566431.1U
Authority: CN
Inventors: 杨学刚; 许国辉; 李德珊
Original assignee: Sichuan Cancer Hospital
Current assignee: Sichuan Cancer Hospital
Priority date: 2020-07-31
Filing date: 2020-07-31
Publication date: 2022-02-22
Anticipated expiration: 2030-07-31

Abstract

The utility model relates to a tip-controllable microcatheter and a kit, wherein the microcatheter comprises a tube body for accommodating a guide wire and an adjusting part arranged on the tube body, the rear end of the tube body is provided with a joint, and the adjusting part is used for adjusting the curvature of the front end of the tube body; the micro-catheter provided by the utility model has a simple and compact structure, on one hand, the bending radian of the front end of the micro-catheter can be conveniently controlled so that medical personnel can adjust the position of the front end of the micro-catheter, so that the micro-catheter can conveniently, quickly and efficiently puncture to a tumor position, the operation is simplified, and the efficiency is improved.

Description

Tip-controllable microcatheter and kit

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a tip-controllable microcatheter and a kit.

Background

Interventional therapy is minimally invasive therapy carried out by modern high-tech means, and is generally characterized in that under the guidance of medical imaging equipment, special precise instruments such as micro catheters, guide wires and the like are introduced into a human body to diagnose and locally treat internal diseases; the digital technology is applied to interventional therapy, the visual field of medical workers is expanded, the hands of the medical workers are prolonged by means of the microcatheter and the guide wire, the incision (puncture point) of the interventional therapy is only the size of rice grains, and a plurality of diseases which cannot be treated in the past, must be treated by operation or have poor curative effect in internal treatment can be treated without cutting human tissues, such as tumors, hemangiomas, various hemorrhages and the like.

In clinic, a medical staff usually operates the rear end of the microcatheter to adjust the position of the front end of the microcatheter under the guidance of the medical imaging device, so as to push the microcatheter to puncture to a tumor position (or a target blood vessel) along a predetermined path, however, the path from the puncture point to the tumor position is usually tortuous, for example, the diameter of the blood vessel may become smaller and smaller, the bifurcation of the blood vessel is more, the microcatheter needs to be bent at a larger angle, and the existing microcatheter is inconvenient for the medical staff to adjust the position of the front end of the microcatheter, thereby causing the problems of complicated operation, long time consumption, and even frequent puncture failure to be solved urgently.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art, and provides a micro-catheter which is simple and compact in structure and reasonable in design, so that medical personnel can conveniently control the bending radian of the front end of the micro-catheter to adjust the position of the front end of the micro-catheter, the micro-catheter can conveniently, quickly and efficiently puncture to a tumor position, the operation is simplified, the efficiency is improved, and the defects in the prior art can be effectively overcome.

The technical scheme adopted by the utility model for solving the technical problems is as follows:

in order to solve the problem that the position of the front end of the micro-catheter cannot be effectively adjusted in the process of interventional operation puncture, the tip controllable micro-catheter is provided and comprises a catheter body used for accommodating a guide wire and an adjusting portion arranged on the catheter body, wherein a joint is arranged at the rear end of the catheter body, and the adjusting portion is used for adjusting the bending degree of the front end of the catheter body. In this scheme, the body through at little pipe sets up regulating part for in-process carrying out the puncture, medical personnel can be according to the puncture route of reality, through the crookedness of regulating part convenience, regulation body front end effectively, thereby reach the purpose of effectively adjusting body front end position and/or position, make the body front end can make things convenient for, quick advance along predetermined puncture route, and finally fix a position the position department of tumour position or target vessel.

For solving the problem of body front end crookedness adjustable, it is further, regulating part includes the transmission line and sets up in the gripping piece of transmission line one end, the one end of transmission line with the front end of body links to each other, the transmission line along the length direction of body to the rear end extension of body, and with the gripping piece links to each other. In this scheme, through the front end at the body connect the transmission line to make the transmission line extend along the length direction of body, so that at the in-process of puncture, the one end of transmission line can extend outside, and with the gripping member links to each other, and medical personnel can pull or relax the transmission line through the gripping member, with the crooked radian of adjusting the body front end, reaches body front end crookedness adjustable purpose, so that medical personnel effectively adjust the position and/or the position of body front end.

Preferably, the drive line is a flexible line. In particular, a flexible thin line with good toughness and small cross section area is adopted so as to be straightened under the action of external force and drive the front end of the pipe body to be bent.

For facilitating the puncture, preferably, the tube is a hose. Due to the adoption of the hose, the micro-catheter has certain rigidity and certain flexibility, so that the micro-catheter can be bent to different degrees under the action of the transmission line, and the orientation can be smoothly changed.

Preferably, the tube body is made of rubber, plastic or high polymer materials.

In order to solve the problem of keeping the bending amplitude of the front end of the pipe body, the pipe comprises a pipeline, the holding piece comprises a base and a knob, the base is provided with an inner cavity, one end of the pipeline is connected with the pipe body or the outer pipe, the other end of the pipeline is connected with the base, the pipeline is communicated with the inner cavity,

the base is provided with a section of external thread, the knob is provided with an internal thread matched with the external thread, a winding part is arranged in the internal cavity, the knob is connected with the winding part through a transmission rod and is arranged on the base through the matching of the internal thread and the external thread,

one end of the drive wire extends into the internal cavity through the conduit and is secured to the spool piece. In this scheme, because be connected through the screw thread between knob and the base, medical personnel can rotate the knob to drive winding parts rotates, thereby can tighten up the driving line, and the front end that drives the body is crooked, simultaneously can constantly twine the driving line in winding parts, after medical personnel loosen the knob, because frictional force between knob and the base is greater than the pulling force of driving line, the knob can not rotate by oneself under the effect of driving line, thereby can make the stable required crooked radian that keeps of body front end, so that medical personnel can vacate the hand and carry out other operations, unusual convenience.

In another scheme, the holding piece comprises a base and a knob, the base is provided with an inner cavity and is arranged on the joint,

one end of the drive wire extends into the interior cavity and is secured to the winding member. In this scheme, through with the base integration in connect, can cancel to set up the pipeline, can not only realize the same technological effect, be favorable to the structure moreover simpler, compact.

In order to facilitate the storage of the transmission line, it is preferable that the winding member is a reel or a bobbin provided with an annular groove. So that the accommodation of the transmission line is realized through the rotation.

Preferably, the conduit is a hose.

In order to solve the technical problem of pulling the transmission line to drive the front end of the pipe body to bend, in one concept, a pore passage for accommodating the transmission line is arranged in the side wall of the pipe body, the pore passage is arranged along the length direction of the pipe body, one end of the pore passage penetrates out of the side wall of the pipe body at a set distance from the front end of the pipe body,

the other end of the pore passage penetrates through the side wall of the pipe body at a set distance from the joint or extends out of the pipe body from the other end of the pipe body,

one end of the transmission line is arranged on the outer side of the pipe body and connected with the front end of the pipe body, and the other end of the transmission line extends out of the pipe body through the pore passage and extends into the inner cavity. In this scheme, through setting up the pore, can effectively accomodate partial transmission line to make the one end of transmission line link to each other with the outside of body, a part of transmission line can stay in the outside of body, and another part transmission line can extend the body via the pore, and with the grip links to each other, so that keep the grip in vitro, the part body between pore and the body front end just can take place crooked, and the part that crooked radian can be adjusted at the in-process that stimulates the transmission line, through the reasonable interval that sets up between pore and the body front end, can effectively adjust the crooked radian of body front end.

In order to solve the technical problem of driving the front end of the pipe body to bend by pulling the transmission line, in another design, a layer of outer pipe is further arranged on the outer side of the pipe body, two ends of the outer pipe are respectively connected with the side wall of the pipe body, a gap is formed between the outer pipe and the pipe body, the outer pipe is provided with a first communication hole and a second communication hole, the first communication hole and the second communication hole are respectively communicated with the outer pipe, a set distance is formed between the first communication hole and the front end of the pipe body, one end of the transmission line is arranged on the outer side of the pipe body and is connected with the front end of the pipe body, and the other end of the transmission line enters the outer pipe through the first communication hole, extends out of the outer pipe through the second communication hole and extends into the inner cavity. In this scheme, through setting up the outer tube, can effectively accomodate partial transmission line to make the one end of transmission line link to each other with the outside of body, the outside at the body can be stayed to some transmission line, and another part transmission line can extend the outer tube via the clearance between outer tube and the body, and with the grip links to each other, so that keep somewhere the grip in vitro, the part body between first communicating hole and the body front end just can take place the bending at the in-process that stimulates the transmission line, and the part that crooked radian can be adjusted, through the reasonable interval that sets up between pore and the body front end, can effectively adjust the crooked radian of body front end.

A kit comprising the microcatheter and a guidewire disposed within the body.

Compared with the prior art, the tip-controllable microcatheter and the kit provided by the utility model have simple and compact structures, on one hand, medical care personnel can conveniently control the bending radian of the front end of the microcatheter so as to adjust the position of the front end of the microcatheter, so that the microcatheter can conveniently, quickly and efficiently puncture to a tumor position, and the operation is simplified and the efficiency is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a microcatheter provided in embodiment 1 of the present invention.

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

Fig. 3 is a schematic structural diagram of a micro catheter provided in embodiment 2 of the present invention.

Fig. 4 is a view B-B of fig. 3.

Fig. 5 is a schematic structural diagram of a micro catheter provided in embodiment 3 of the present invention.

Fig. 6 is a partial cross-sectional view of fig. 5.

Fig. 7 is a schematic structural view of another microcatheter provided in example 3 of the present invention.

Description of the drawings

Microcatheter 100, tubular body 101, driving wire 102, holding member 103, first communicating hole 104, second communicating hole 105, hole channel 106, outer tube 107, joint 108

A conduit 201, a base 202, external threads 203, an internal cavity 204, a knob 205, internal threads 206, a drive rod 207, and a wire wrap member 208.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of embodiments of the present invention 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 present invention, 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 derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

Referring to fig. 1, the present embodiment provides a tip-controllable microcatheter, including a tube 101 for accommodating a guide wire and an adjusting portion disposed on the tube 101, wherein a joint 108 is disposed at a rear end of the tube 101, and the joint 108 may be an existing joint 108 for connecting a connecting tube, which is not described herein again;

in this embodiment, the adjusting portion is used for adjusting the curvature of the front end of the pipe body 101; through setting up the regulating part at body 101 at microcatheter 100 for medical personnel can be according to the puncture route of reality at the in-process of carrying out the puncture, through the crookedness of regulating part convenience, regulation body 101 front end effectively, thereby reach the purpose of effectively adjusting body 101 front end position and/or position, make body 101 front end can make things convenient for, quick advance along predetermined puncture route, and finally fix a position the position department of tumour position or target vessel.

In order to adjust the curvature of the front end of the tube 101, there are various embodiments, and as a preferable embodiment, in this embodiment, the adjusting portion includes a transmission line 102 and a holding part 103 disposed at one end of the transmission line 102, as shown in fig. 1, one end of the transmission line 102 is connected to the front end of the tube 101, and the transmission line 102 extends toward the rear end of the tube 101 (the end provided with the joint 108 is the rear end, which is not described in detail below) along the length direction of the tube 101 and is connected to the holding part 103; so that in the process of puncture, the one end of transmission line 102 can extend outside the body, and with holding piece 103 links to each other, and medical personnel can pull or relax transmission line 102 through holding piece 103 to adjust the crooked radian of body 101 front end, reach the purpose of body 101 front end crookedness adjustable, so that medical personnel effectively adjust the position and/or the position of body 101 front end.

In this embodiment, the driving wire 102 is preferably a flexible wire, and particularly, a flexible thin wire with good toughness and small cross-sectional area may be used to straighten the tube under the action of an external force and drive the front end of the tube 101 to bend.

For the convenience of puncture, the tube body 101 may be a flexible tube, so that the microcatheter 100 has certain flexibility while having certain rigidity, so as to be bent to different degrees under the action of the driving wire 102, so as to change the orientation smoothly; by way of example, the tubular body 101 may be made of rubber, plastic or polymer material.

In order to allow the medical staff to drive the front end of the tube body 101 to bend by pulling the driving wire 102, so as to effectively adjust the orientation of the front end of the tube body 101, there are various embodiments, as a preferred embodiment, a duct 106 for accommodating the driving wire 102 is provided in the side wall of the tube body 101, as shown in fig. 1 and 2, the duct 106 is provided along the length direction of the tube body 101, one end of the duct 106 penetrates through the side wall of the tube body 101 at a set distance from the front end of the tube body 101,

the other end of the bore 106 extends through the side wall of the body 101 at a set distance from the fitting 108, as shown in figures 1 and 2, or the other end of the bore 106 extends out of the body from the other end of the body,

one end of the transmission line 102 is disposed outside the tube 101 and connected to the front end of the tube 101, and the other end extends out of the tube 101 through the hole 106 and is connected to the holding member 103, as shown in fig. 1 and 2; in this embodiment, by arranging the duct 106, a part of the transmission line 102 can be effectively accommodated, and one end of the transmission line 102 is connected to the outside of the tube 101, a part of the transmission line 102 can be left outside the tube 101, another part of the transmission line 102 can extend out of the tube 101 through the duct 106 and is connected to the holding part 103, so that the holding part 103 is left outside the body, a part of the tube 101 between the duct 106 and the front end of the tube 101 is a part which can be bent and the curvature of the bend can be adjusted in the process of pulling the transmission line 102, and by reasonably setting the distance between the duct 106 and the front end of the tube 101, the curvature of the bend at the front end of the tube 101 can be effectively adjusted, so as to meet the requirements of different occasions.

The grip 103 has various embodiments for easy holding, and preferably, the grip 103 may be a ring structure, a block structure, a sheet structure or a column structure, so that the grip 103 has a certain size and shape for the medical staff to hold and pull; by way of example, in the present embodiment, the grip 103 may be a ring structure, as shown in fig. 1.

In this embodiment, the front end of the tube 101 may have a predetermined curvature at the beginning (i.e. before use), which is more convenient for adjusting the curvature of the front end of the tube 101 under the pulling of the transmission line 102.

Example 2

The main difference between the present embodiment 2 and the above embodiment 1 is that the driving wire 102 is arranged differently, in the microcatheter 100 provided in the present embodiment, a layer of outer tube 107 is further arranged on the outer side of the tube 101, both ends of the outer tube 107 are respectively connected to the side walls of the tube 101, a gap is provided between the outer tube 107 and the tube 101, as shown in fig. 3 and 4, the outer tube 107 is provided with a first communicating hole 104 and a second communicating hole 105, the first communicating hole 104 and the second communicating hole 105 are respectively communicated with the outer tube 107, the first communicating hole 104 and the front end of the tube 101 have a set distance, one end of the driving wire 102 is arranged on the outer side of the tube 101 and is connected to the front end of the tube 101, the other end of the driving wire enters the outer tube 107 through the first communicating hole 104, extends out of the outer tube 107 through the second communicating hole 105, and is connected to the grip 103, as shown in fig. 3 and 4; in this embodiment, by arranging the outer tube 107, a part of the transmission line 102 can be effectively accommodated, and one end of the transmission line 102 is connected with the outer side of the tube body 101, a part of the transmission line 102 can be left at the outer side of the tube body 101, another part of the transmission line 102 can extend out of the outer tube 107 through a gap between the outer tube 107 and the tube body 101, and is connected with the holding part 103, so that the holding part 103 is left outside the body, a part of the tube body 101 between the first communication hole 104 and the front end of the tube body 101 can be bent in the process of pulling the transmission line 102, and the bending radian of the front end of the tube body 101 can be effectively adjusted by reasonably setting the distance between the pore passage 106 and the front end of the tube body 101, so as to meet the requirements of different occasions.

Example 3

In order to keep the bending amplitude of the front end of the tube 101 unchanged during the use process until the medical staff adjusts, the main difference between this embodiment 3 and the above embodiment 1 or embodiment 2 is that in the microcatheter 100 provided in this embodiment, a tube 201 is further included, the grip 103 includes a base 202 and a knob 205, the base 202 is provided with an internal cavity 204, one end of the tube 201 is connected to the tube 101 or the outer tube 107, the other end is connected to the base 202, and the tube 201 is communicated with the internal cavity 204, as shown in fig. 5 and 6,

the base 202 is provided with a section of external thread 203, the knob 205 is provided with an internal thread 206 matched with the external thread 203, the internal cavity 204 is provided with a wire winding part 208, the knob 205 is connected with the wire winding part 208 through a transmission rod 207 and is arranged on the base 202 through the matching of the internal thread 206 and the external thread 203, so that the wire winding part 208 is driven to rotate through the knob 205,

as shown in fig. 5 and 6, one end of the driving wire 102 extends into the inner cavity 204 through the duct 201 and is fixed to the winding member 208; in this embodiment, by reasonably arranging the external thread 203 and the internal thread 206, the friction force between the knob 205 and the base 202 is always greater than the pulling force on the transmission line 102, and the pitch of the rotation of one turn is smaller than the length of the transmission line 102 wound on the winding part 208 of one turn, in practical use, since the knob 205 is connected with the base 202 through the thread, the knob 205 can be restrained, and the medical staff can rotate the knob 205 to drive the winding part 208 to rotate, so as to tighten the transmission line 102 and drive the front end of the tube body 101 to bend, and simultaneously, the transmission line 102 can be continuously wound on the winding part 208, after the medical staff loosens the knob 205, since the friction force between the knob 205 and the base 202 is greater than the pulling force of the transmission line 102 (the pulling force on the transmission line 102 is usually small), the knob 205 cannot rotate by itself under the action of the transmission line 102, therefore, the front end of the tube body 101 can stably maintain the required bending radian, so that medical staff can leave out hands to perform other operations (or can realize one-hand operation), and the operation is very convenient.

To facilitate the storage of the transmission line 102, the winding part 208 may be a reel with an annular groove, as shown in fig. 6, or a reel commonly used in the art, so as to store the transmission line 102 by rotation, and the winding part 208 has a height enough to allow the transmission line 102 to be wound around the winding part 208 when the knob 205 moves up and down relative to the base 202.

Preferably, the pipe 201 may also be a hose, which only needs to wrap the driving wire 102 and provide a supporting force for tightening the driving wire 102.

It is understood that the grip 103 may also be disposed on the joint 108, as shown in fig. 7, specifically, the base 202 is disposed on the joint 108, in this case, the pipe 201 may not be needed, one end of the transmission wire 102 may directly extend into the inner cavity 204 and be connected to the winding member 208, in this case, the second communication hole 105 may also not be needed, and one end of the transmission wire directly extends out of the outer tube 107 through one end of the outer tube 107 and extends into the inner cavity 204.

Example 4

The present embodiment provides a kit for interventional procedures, including the microcatheter 100 of embodiment 1 or embodiment 2 or embodiment 3, and a guide wire, which is disposed in the tube 101, and the guide wire may be a guide wire commonly used in the prior art; in the interventional operation, the microcatheter 100 and the guide wire in the kit can be operated according to the existing specifications, and the detailed description is omitted.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention.

Claims

1. The tip-controllable microcatheter is characterized by comprising a tube body for accommodating a guide wire and an adjusting part arranged on the tube body, wherein the rear end of the tube body is provided with a joint;

the adjusting part comprises a transmission line and a holding piece arranged at one end of the transmission line, one end of the transmission line is connected with the front end of the tube body, and the transmission line extends to the rear end of the tube body along the length direction of the tube body and is connected with the holding piece.

2. The tip-controllable microcatheter of claim 1, further comprising a tube, wherein the grip comprises a base and a knob, the base is provided with an internal cavity, one end of the tube is connected to the body and the other end is connected to the base, and the tube is in communication with the internal cavity,

one end of the drive wire extends into the internal cavity through the conduit and is secured to the spool piece.

3. The tip-controllable microcatheter of claim 1, wherein the grip comprises a base provided with an interior cavity and a knob, the base provided with the adapter,

one end of the drive wire extends into the interior cavity and is secured to the winding member.

4. The tip-controllable microcatheter according to claim 2 or 3, wherein the wire winding part is a reel or a bobbin provided with an annular groove.

5. The tip-controllable microcatheter according to claim 2 or 3, wherein a channel for accommodating the driving wire is provided in the sidewall of the tube, the channel being provided along the length of the tube, one end of the channel penetrating the sidewall of the tube at a set distance from the front end of the tube,

one end of the transmission line is arranged on the outer side of the pipe body and connected with the front end of the pipe body, and the other end of the transmission line extends out of the pipe body through the pore passage and extends into the inner cavity.

6. The tip-controllable microcatheter according to claim 2 or 3, wherein an outer tube is further provided at an outer side of the tube, and both ends of the outer tube are respectively connected to the sidewalls of the tube, a gap is provided between the outer tube and the tube, the outer tube is provided with a first communicating hole and a second communicating hole, the first communicating hole and the second communicating hole are respectively communicated with the outer tube, and the first communicating hole has a set interval from the front end of the tube,

one end of the transmission line is arranged on the outer side of the tube body and is connected with the front end of the tube body, and the other end of the transmission line enters the outer tube through the first communication hole, extends out of the outer tube through the second communication hole and extends into the inner cavity.

7. The tip-controllable microcatheter according to any of claims 1-3, wherein the drive wire is a flexible wire.

8. The tip-controllable microcatheter of claim 2, wherein the tube and/or conduit is a hose.

9. A kit comprising the microcatheter of any of claims 1-8 and a guidewire disposed within the body.