CN219127892U

CN219127892U - Adjustable bending guide device

Info

Publication number: CN219127892U
Application number: CN202222849007.3U
Authority: CN
Inventors: 徐孙希; 林起航
Original assignee: Suzhou Hengrui Hongyuan Medical Technology Co ltd
Current assignee: Suzhou Hengrui Hongyuan Medical Technology Co ltd
Priority date: 2022-10-27
Filing date: 2022-10-27
Publication date: 2023-06-06
Anticipated expiration: 2032-10-27

Abstract

The utility model relates to an adjustable bending guide device, which comprises an outer tube, an inner tube and a bending control piece, wherein: one end of the outer tube is a proximal end, the opposite end is a distal end, the outer tube is provided with at least one first bending groove on the tube body close to one side of the distal end, and the distal end of the outer tube is provided with a connector; the inner tube is inserted into the outer tube, and at least one second bending groove is formed in the tube body at one side close to the distal end of the inner tube; the bending control piece comprises a bending control wire and a bending control ring which is integrally formed with the bending control wire, the bending control ring is connected to the connecting head, the bending control wire is positioned between the outer tube and the inner tube, and part of the bending control wire extends out of the proximal end of the outer tube; according to the bending-adjustable guide device, the bending positioning of the bending-adjustable guide device can be realized through the synchronous extrusion action of the first bending groove and the second bending groove, the bending adjustment degree is large, and the bending-adjustable wire and the bending-control ring are integrally formed, so that adverse phenomena such as falling and breakage of the bending-adjustable wire are not easy to occur in the traction process.

Description

Adjustable bending guide device

Technical Field

The utility model relates to the technical field of medical instruments, in particular to an adjustable bending guide device.

Background

Interventional therapy is a minimally invasive therapy performed by using modern high-tech means, namely, under the guidance of medical imaging equipment, special precise instruments such as catheters, guide wires and the like are introduced into a human body to diagnose and locally treat in vivo pathological conditions, such as Tips operation. The interventional therapy has the characteristics of no operation, small wound, quick recovery, good effect and the like, so that the interventional therapy becomes the development trend of future medicine. The existing operation method of interventional therapy is usually that a doctor bends the head end of a guiding device in advance in vitro by experience and then punctures the head end to a designated position for positioning, but the operation method needs a great deal of practical operation experience of the doctor to ensure the effectiveness and accuracy of puncture, and particularly for relatively complex vascular distribution in a human body, more accurate and convenient interventional therapy is needed.

In order to facilitate the positioning of doctors, the guiding device with adjustable bending appears in the prior art, and the guiding device comprises a bending adjusting pipe body and a bending adjusting wire connected to the end part of the bending adjusting pipe body, and the end part of the bending adjusting pipe body reaches a treatment part by applying external force on the bending adjusting wire to adjust the bending of the bending adjusting pipe body. But the bending degree of the guiding device is limited, and the bending angle of the guiding device is not easy to control, in addition, as the bending wire of the guiding device is fixed on the bending guide pipe in a welding or gluing mode, the bending wire is easy to fall off from the bending pipe body in the process of applying external force to the bending wire, and the use experience of a user is seriously influenced.

Disclosure of Invention

Based on the above, it is necessary to provide an adjustable bending guide device for solving the problems that the conventional guide device has limited bending degree, the bending angle is not easy to control, and the bending wire is easy to fall off from the bending tube.

An adjustable bend guide device comprising:

the outer tube is provided with at least one first bending groove on a tube body close to one side of the distal end, and the distal end of the outer tube is provided with a connector;

the inner tube is inserted into the outer tube, and at least one second bending groove is formed in the tube body at one side close to the distal end of the inner tube;

the bending control piece comprises a bending control wire and a bending control ring integrally formed with the bending control wire, wherein the bending control ring is connected to the connector, the bending control wire is located between the outer tube and the inner tube, and part of the bending control wire extends out of the outer tube at the outer side of the proximal end.

According to the adjustable bending guide device, the inner tube is inserted into the outer tube, and the bending control ring is connected to the connecting head, so that the outer tube, the inner tube and the bending control piece are fixedly connected. When acting force is applied to the bending wire, the bending wire pulls the outer tube to act, at the moment, the first bending groove extrudes towards the inner side, the inner tube and the outer tube simultaneously take follow-up action, the second bending groove extrudes towards the inner side, the outer tube and the inner tube are simultaneously bent, the distal ends of the outer tube and the inner tube reach the target treatment position, the interventional instrument stretches into the inner tube cavity, and the interventional instrument is pushed from the proximal end towards the distal end, so that the interventional instrument reaches the target position for treatment. According to the adjustable bending guide device, the bending positioning of the adjustable bending guide device can be realized through synchronous extrusion actions of the first bending groove and the second bending groove, the operation is simple and reliable, and the bending adjustment degree is large; because the bending wire is adjusted and the bending ring is controlled to be integrally formed, the adverse phenomena such as falling off and fracture of the bending wire are not easy to occur in the process of pulling the outer tube, and the first bending groove and the second bending groove can ensure the supporting strength of the outer tube and the inner tube, so that the bending guiding device can conveniently extend into the target treatment position.

In one embodiment, the first bending grooves and the second bending grooves are multiple, the first bending grooves are distributed at intervals in the extending direction of the outer tube, and the second bending grooves are distributed at intervals in the extending direction of the inner tube.

In one embodiment, the first bending groove penetrates through the wall of the outer tube, and the second bending groove penetrates through the wall of the inner tube.

In one embodiment, the first bending groove has a groove structure, the depth of the first bending groove is smaller than the wall thickness of the outer tube, the opening of the first bending groove faces the outer side of the outer tube, the second bending groove also has a groove structure, the depth of the second bending groove is smaller than the wall thickness of the inner tube, and the opening of the second bending groove faces the outer side of the inner tube.

In one embodiment, the cross section of the first bending groove on the outer wall of the outer tube is arc-shaped or circular along the extending direction of the outer tube.

In one embodiment, along the extending direction of the inner tube, the cross section of the second bending groove on the outer wall of the inner tube is arc-shaped, the cross section of the second bending groove is minor arc, and a plurality of second bending grooves are distributed on one side of the inner tube.

In one embodiment, the number of the bending wires is two, and the two bending wires are symmetrically distributed in the radial direction of the outer tube.

In one embodiment, the bending control device further comprises a bending control handle, the outer tube is provided with a fixing groove close to the distal end, the bending control handle is fixed in the fixing groove, and the end part of the bending adjustment wire extending to the outer side of the outer tube is wound on the bending control handle.

In one embodiment, the connector is provided with a plurality of clamping grooves, the bending control ring is provided with a plurality of protruding columns in a protruding mode, and the protruding columns can be correspondingly inserted into the clamping grooves.

In one embodiment, the inner tube has a guide on a side near the distal end that can extend into a target treatment site when the inner tube is bent.

Drawings

FIG. 1 is a schematic view of a structure of an adjustable bend guide device according to the present utility model;

FIG. 2 is an exploded view of the adjustable bend guide provided by the present utility model;

FIG. 3 is an enlarged view of a portion of area A of FIG. 2;

fig. 4 is a partial enlarged view of the region B in fig. 2.

Reference numerals:

100. an adjustable bend guide;

110. an outer tube; 111. a first bending groove; 112. a connector; 1121. a clamping groove; 113. a fixing groove;

120. an inner tube; 121. a second bending groove; 122. a guide part;

130. a bending control piece; 131. bending wire; 132. a bending control ring; 1321. and (5) a convex column.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

The following describes the technical scheme provided by the embodiment of the utility model with reference to the accompanying drawings.

As shown in fig. 1-4, the present utility model provides an adjustable bend guiding device 100, where the adjustable bend guiding device 100 includes an outer tube 110, an inner tube 120, and a bending control member 130, and the adjustable bend guiding device 100 is used to guide an interventional instrument such as a puncture needle, a puncture catheter, etc. to a target location for treatment.

One end of the outer tube 110 is proximal and the opposite end is distal, i.e. the outer tube 110 has opposite ends in its extension, one end being proximal and the other end being distal. In the present utility model, the proximal end of the outer tube 110 is the user's grip end and the distal end of the outer tube 110 is the end that extends into the target treatment site. The body of the outer tube 110 is provided with at least one first bending groove 111, the first bending groove 111 is located at one side of the outer tube 110 near the distal end thereof, and the distal end of the outer tube 110 is further provided with a connector 112. The first bending groove 111 may be formed by laser cutting, plasma cutting, or the like, and the bending of the outer tube 110 is achieved by extrusion closing or stretching and expanding of the first bending groove 111.

The inner tube 120 is inserted into the outer tube 110, i.e. the extending direction of the inner tube 120 is consistent with the extending direction of the outer tube 110, so as to sleeve the outer tube 110 on the inner tube 120, and the inner tube 120 can be used for placing interventional instruments such as a puncture needle, a puncture catheter, and the like and provide a guiding channel for the interventional instruments. The inner tube 120 is provided with at least one second bending groove 121, and the second bending groove 121 is positioned at one side of the inner tube 120 near the distal end thereof. The inner tube 120 has a guiding portion 122 at a side near the distal end, and when the inner tube 120 is bent, the guiding portion 122 can extend into a target treatment position, and is used for guiding an interventional instrument such as a puncture needle, a puncture catheter, etc. to extend into the target position for treatment, and can be fixedly connected with other medical instruments, so as to play a role in cooperative treatment. The second bending groove 121 is formed by laser cutting, plasma cutting, etc., and the inner tube 120 and the outer tube 110 are bent by extrusion, closing, or stretching of the second bending groove 121.

The bending control member 130 includes a bending adjustment wire 131 and a bending control ring 132, and the bending adjustment wire 131 and the bending control ring 132 are integrally formed. The bending control ring 132 is connected to the connector 112 by a clamping connection, a screwing connection, or the like, so as to connect the bending control member 130 with the outer tube 110 and the inner tube 120 into a whole. The bending wire 131 is located between the outer tube 110 and the inner tube 120, and the bending wire 131 partially extends to the outer side of the proximal end of the outer tube 110, that is, the extending direction of the bending wire 131 is consistent with or forms an acute angle with the extending direction of the outer tube 110, so that the user can apply a force on the end of the bending wire 131 conveniently. Preferably, the bending-adjusting wire 131 and the bending-controlling ring 132 are formed by cutting a pipe in a laser cutting and plasma cutting mode, so that the forming process of the bending-controlling member 130 is simplified, the bending-adjusting wire 131 and the bending-controlling ring 132 can be in an integrated structure, and compared with a traditional split structure, the connecting strength between the bending-adjusting wire 131 and the bending-controlling ring 132 is better, the bending-adjusting wire 131 can bear larger acting force in the bending-adjusting process, and adverse phenomena such as falling and breakage of the bending-adjusting wire 131 are not easy to occur.

When an acting force is applied to the bending wire 131, the bending wire 131 pulls the outer tube 110 to act, at this time, the first bending groove 111 is pressed towards the inner side, meanwhile, the inner tube 120 and the outer tube 110 are pressed towards the inner side, the second bending groove 121 is pressed towards the inner side, the outer tube 110 and the inner tube 120 are simultaneously bent, the distal ends of the outer tube 110 and the inner tube 120 reach the target treatment position, the interventional instrument is extended into the cavity of the inner tube 120, and the interventional instrument is pushed from the proximal end towards the distal end, so that the interventional instrument reaches the target position for treatment. According to the adjustable bending guide device 100 provided by the utility model, the bending positioning of the adjustable bending guide device 100 can be realized through the synchronous extrusion actions of the first bending groove 111 and the second bending groove 121, the operation is simple and reliable, and the bending adjustment degree is large; because the bending wire 131 and the bending control ring 132 are integrally formed, in the process of pulling the outer tube 110, adverse phenomena such as falling off and breakage of the bending wire 131 are not easy to occur, and the first bending groove 111 and the second bending groove 121 can ensure the supporting strength of the outer tube 110 and the inner tube 120, so that the adjustable bending guide device 100 can conveniently extend into a target treatment position.

In order to increase the bending width of the bending guide 100, as shown in fig. 1 to 4, the first bending grooves 111 and the second bending grooves 121 are all plural, and the first bending grooves 111 are spaced apart in the extending direction of the outer tube 110, and the second bending grooves 121 are spaced apart in the extending direction of the inner tube 120. When an acting force is applied to the bending wire 131, the bending wire 131 pulls the outer tube 110 to act, at this time, the first bending grooves 111 are all extruded towards the inner side, meanwhile, the inner tube 120 and the outer tube 110 are also extruded towards the inner side, the second bending grooves 121 are also extruded towards the inner side, the outer tube 110 and the inner tube 120 are simultaneously bent, the distal ends of the outer tube 110 and the inner tube 120 reach a target treatment position, an interventional instrument is stretched into the cavity of the inner tube 120, and the interventional instrument is pushed from the proximal end towards the distal end, so that the interventional instrument can reach the target position for treatment. The first bending grooves 111 and the second bending grooves 121 have larger space for yielding, and the first bending grooves 111 and the second bending grooves 121 can improve the bending degree of the adjustable bending guide device 100.

In an embodiment, as shown in fig. 1-4, the first bending groove 111 penetrates through the wall of the outer tube 110, that is, the first bending groove 111 has a through groove structure, so that the first bending groove 111 has a larger yielding space in the process of being forced and extruded, and the outer tube 110 has a larger bending angle in the process of being pulled. Similarly, the second bending groove 121 penetrates through the pipe wall of the inner pipe 120, that is, the second bending groove 121 is also of a through groove structure, so that the second bending groove 121 has a larger yielding space in the stress extrusion process, and the inner pipe 120 has a larger bending angle in the traction process. The bending angle of the adjustable bending guide 100 can be further enlarged by the cooperation of the first bending groove 111 and the second bending groove 121.

In an embodiment, as shown in fig. 1-4, the first bending groove 111 is in a groove structure, and the depth of the first bending groove 111 is smaller than the wall thickness of the outer tube 110, the opening of the first bending groove 111 faces to the outer side of the outer tube 110, that is, the first bending groove 111 does not penetrate through the wall of the outer tube 110, and the first bending groove 111 has certain rigidity and supporting strength under the premise of ensuring a certain bending degree of the outer tube 110 in the forced extrusion process, so that the outer tube 110 can conveniently extend into a target treatment position, and the outer tube 110 can be prevented from abutting against skin, blood vessels or other parts due to excessive bending in the bending process, so that a patient is prevented from being secondarily injured or the outer tube 110 cannot continuously extend into the target treatment position. Likewise, the second bending groove 121 is also a groove structure, and the depth of the second bending groove 121 is smaller than the wall thickness of the inner tube 120, the opening of the second bending groove 121 faces the outer side of the inner tube 120, that is, the second bending groove 121 does not penetrate through the wall of the inner tube 120, and the second bending groove 121 has certain rigidity and supporting strength under the premise of ensuring a certain bending degree of the inner tube 120 in the stress extrusion process, so that the inner tube 120 can conveniently extend into a target treatment position, and the inner tube 120 can be prevented from being abutted against the skin, the blood vessel or other parts due to excessive bending in the bending process, thereby avoiding secondary injury to a patient or the outer tube 110 can not continuously extend into the target treatment position.

Further, as shown in fig. 1 to 4, the first bending groove 111 has an arc-shaped or circular cross section on the outer wall of the outer tube 110 along the extending direction of the outer tube 110. In one embodiment, along the extending direction of the outer tube 110, the cross section of the first bending groove 111 on the outer wall of the outer tube 110 is arc-shaped, that is, the first bending groove 111 is an arc-shaped groove, the two ends of the first bending groove 111 are not communicated, the first bending groove 111 is set to be an arc-shaped groove structure, and the rigidity of the outer tube 110 is improved on the premise that the outer tube 110 is bendable, so that the device has a better supporting and guiding effect on the interventional instruments such as a puncture needle, a puncture catheter and the like. In another embodiment, along the extending direction of the outer tube 110, the cross section of the first bending groove 111 on the outer wall of the outer tube 110 is circular, that is, the first bending groove 111 is an annular groove, two ends of the first bending groove 111 are mutually communicated, the first bending groove 111 is arranged to be an annular groove structure, the first bending groove 111 has a larger abdication space in the extrusion process, and the bending angle of the outer tube 110 can be further enlarged, so that the outer tube 110 can guide the interventional instrument to extend into a more complex target treatment position, and the applicability of the adjustable bending guide device 100 is improved.

In order to achieve a better guiding effect on the interventional instrument, specifically, as shown in fig. 1 to 4, the cross section of the second bending groove 121 on the outer wall of the inner tube 120 is arc-shaped along the extending direction of the inner tube 120, that is, the second bending groove 121 is arc-shaped, and the cross section of the second bending groove 121 is minor arc-shaped, and the plurality of second bending grooves 121 are all distributed on one side of the inner tube 120. Only a plurality of second bending grooves 121 are formed in one side of the inner tube 120, when the inner tube 120 is bent, the second bending grooves 121 are extruded, so that the inner tube 120 reaches a target treatment position, and as the inner wall of the other side of the inner tube 120 is in a smooth state, interventional instruments such as a puncture needle, a puncture catheter and the like can reach the target treatment position along the inner wall of one side of the inner tube 120, where the second bending grooves 121 are not formed, no clamping phenomenon occurs, a better guiding effect is achieved on the interventional instruments, and the use of a user is facilitated.

In order to control the bending angle of the bending guide 100, a preferred embodiment, as shown in fig. 1 to 4, has two bending wires 131, and the two bending wires 131 are symmetrically distributed in the radial direction of the outer tube 110. When force is applied to the two bending wires 131, one bending wire 131 can draw the outer tube 110 and the inner tube 120 to bend towards one side, and the other bending wire 131 can draw the outer tube 110 and the inner tube 120 to bend towards the other side, so that the bending angle of the bending guide device 100 can be conveniently adjusted and controlled through the mutual matching of the two bending wires 131. If the angle of the bending-adjustable guiding device 100 extending into the target treatment position to be bent is 45 °, one bending-adjustable wire 131 is pulled to draw the bending-adjustable guiding device 100 to bend, if the bending angle of the bending-adjustable guiding device 100 is 60 °, the other bending-adjustable wire 131 can be pulled to draw the bending-adjustable guiding device 100 to bend towards the other side, and the bending-adjustable guiding device 100 is adjusted from the state of 60 ° to the state of 45 ° to enable the bending-adjustable guiding device 100 to reach the preset bending angle, so that the bending-adjustable guiding device 100 can be conveniently extended into the target treatment position. Of course, the bending adjustment of other angles of the adjustable bending guide 100 is the same as the adjustment operation of the above example, and will not be described again.

In order to reach the target treatment position with the adjustable bend guide 100, a preferred embodiment, as shown in fig. 1-4, the adjustable bend guide 100 further includes a bend control handle (not shown). The outer tube 110 is provided with a fixing groove 113, the fixing groove 113 is located at the proximal end position of the outer tube 110, a bending control handle is fixed in the fixing groove 113 in a clamping and screwing mode, the end part of the bending control wire 131 extending to the outer side of the outer tube 110 is wound on the bending control handle, a user performs corresponding actions on the bending control handle, the bending control handle applies acting force on the bending control wire 131, the outer tube 110 is pulled to perform bending actions through the bending control wire 131, and meanwhile the inner tube 120 and the outer tube 110 bend in a follow-up mode, so that the bending control guide device 100 reaches a target treatment position.

Specifically, in one embodiment, the bend control handle is fixed on the outer tube 110 in a threaded connection manner, and when the user screws the bend control handle, the bend control handle drives the bend adjustment wire 131 to move, so that the projection length of the bend adjustment wire 131 on the outer tube 110 and/or the inner tube 120 is changed, and the bend adjustment wire 131 can pull the outer tube 110 to perform bending action, and simultaneously the inner tube 120 and the outer tube 110 perform follow-up bending, so that the adjustable bend guiding device 100 reaches the target treatment position. In another embodiment, the bending control handle is movably connected to the outer tube 110, and when the user moves the bending control handle, the bending control handle drives the bending wire 131 to move in the extending direction, so that the bending wire 131 can pull the outer tube 110 to perform the bending action, and simultaneously the inner tube 120 and the outer tube 110 bend in a follow-up manner, so that the adjustable bending guide device 100 reaches the target treatment position. Of course, the connection mode of the bending control handle and the outer tube 110 is not limited to the above-mentioned threaded connection or movable connection, and may be any connection mode such as clamping connection, which is only required to satisfy that the bending control handle can apply an acting force on the bending adjustment wire 131 during the movement process to drive the bending adjustment wire 131 to move, so that the bending of the bending adjustment guiding device 100 can occur to reach the target treatment position.

In order to realize the fixed connection between the bending control member 130 and the outer tube 110 and the inner tube 120, in a preferred embodiment, as shown in fig. 1-4, a plurality of clamping grooves 1121 are formed on the connector 112, a plurality of protruding columns 1321 protrude from the bending control ring 132, and when the plurality of protruding columns 1321 are correspondingly inserted into the clamping grooves 1121, the fixed connection between the bending control member 130 and the outer tube 110 and the inner tube 120 can be realized. Among them, it is preferable that the clamping groove 1121 is formed on the joint 112 during the process of cutting the pipe material, so as to simplify the molding process of the outer tube 110 and save the manufacturing cost of the outer tube 110. Likewise, it is preferable that the protrusion 1321 is formed on the bending control ring 132 during the process of cutting the pipe material, so as to simplify the forming process of the bending control member 130 and save the manufacturing cost of the bending control member 130.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. An adjustable bend guide device, comprising:

the outer tube is provided with at least one first bending groove on a tube body close to one side of the distal end, and a connector is arranged on the distal end;

2. The adjustable bend guide device according to claim 1, wherein the first bending grooves and the second bending grooves are plural, the plural first bending grooves are spaced apart in the extending direction of the outer tube, and the plural second bending grooves are spaced apart in the extending direction of the inner tube.

3. The adjustable bend guide according to claim 2, wherein the first bending groove penetrates a wall of the outer tube and the second bending groove penetrates a wall of the inner tube.

4. The adjustable bend guide according to claim 2, wherein the first bending groove has a groove structure and a depth less than a wall thickness of the outer tube, the opening of the first bending groove faces the outer side of the outer tube, the second bending groove also has a groove structure and a depth less than a wall thickness of the inner tube, and the opening of the second bending groove faces the outer side of the inner tube.

5. The adjustable bend guide according to claim 3 or 4, wherein the first bending groove has an arc-shaped or circular cross section on the outer wall of the outer tube in the extending direction of the outer tube.

6. The adjustable bend guide device according to claim 3 or 4, wherein the cross section of the second bending groove on the outer wall of the inner tube is arc-shaped along the extending direction of the inner tube, and the cross section of the second bending groove is minor arc, and a plurality of the second bending grooves are all distributed on one side of the inner tube.

7. The adjustable bend guide according to claim 1, wherein the number of bend-adjusting wires is two, and the two bend-adjusting wires are symmetrically distributed in the radial direction of the outer tube.

8. The adjustable bend guide device according to claim 1, further comprising a bend control handle, wherein the outer tube is provided with a fixing groove near the distal end, the bend control handle is fixed in the fixing groove, and an end portion of the bend control wire extending to the outer side of the outer tube is wound on the bend control handle.

9. The adjustable bend guiding device according to claim 1, wherein the connector is provided with a plurality of clamping grooves, the bending control ring is provided with a plurality of protruding columns in a protruding mode, and the protruding columns can be correspondingly inserted into the clamping grooves.

10. The adjustable bend guide according to claim 1, wherein the inner tube has a guide portion on a side near the distal end, the guide portion being extendable into a target treatment site when the inner tube is bent.