CN212880574U

CN212880574U - Direction controllable guide wire

Info

Publication number: CN212880574U
Application number: CN202020189670.3U
Authority: CN
Inventors: 胡国民
Original assignee: Suzhou Highwire Medical Devices Co ltd
Current assignee: Suzhou Highwire Medical Devices Co ltd
Priority date: 2020-02-20
Filing date: 2020-02-20
Publication date: 2021-04-06
Anticipated expiration: 2030-02-20

Abstract

The utility model discloses a controllable seal wire of direction, including the core silk, the distal end of core silk is provided with the end, the coaxial flexible tube that is provided with a near-end rather than the near-end and closes on in periphery of core silk, the first end of at least one wire of controlling is connected to the near-end of end, the second end of controlling the wire penetrates in the flexible tube and extends to outside the near-end of flexible tube. This scheme simple structure, to control wire connection end and make and control the wire and be located the flexible tube, the crooked characteristic that utilizes the flexible tube on the one hand does not influence the propelling movement of seal wire in the human body, on the other hand can shield controlling the wire effectively, to the injury of human body when avoiding its operation, guarantee its maneuverability simultaneously, can easily change the shape of seal wire distal end through controlling the wire, make the seal wire "turn round" smoothly, therefore can very big reduction operation degree of difficulty, reduce the requirement to operating personnel.

Description

Direction controllable guide wire

Technical Field

The utility model belongs to the technical field of the seal wire and specifically relates to controllable seal wire of direction.

Background

Minimally invasive interventional therapy and endoscopy have been widely developed in recent years as an emerging medical advance, which is an important technique and method for diagnosing and treating a patient by super-selectively delivering an interventional medical device to a number of vital organs and sites of the human body, such as the heart, liver, brain, kidney, digestive system, and reproductive system, through naturally occurring blood vessels or body lumens under the surveillance of a medical imaging device, and has the advantages of no need of surgery, less trauma, and relatively low medical costs.

In the interventional and endoscopic diagnosis and treatment process, the guide wire is used as an important instrument for guiding various catheters and interventional instruments to reach a target position, and is essential and irreplaceable in path exploration, leading deflection, guiding forward movement and the like.

Because the human body cavity is mostly of a bent and forked structure, in the using process, in order to enable the guide wire to smoothly reach the affected part, the far end of the guide wire needs to be manually adjusted to adapt to the shape trend of the human body cavity, however, the direction control difficulty of the soft end of the far end of the conventional guide wire is relatively large, and the requirement on operators is high.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a direction controllable seal wire in order to solve the above-mentioned problem that exists among the prior art.

The purpose of the utility model is realized through the following technical scheme:

the direction-controllable guide wire comprises a core wire, wherein the far end of the core wire is provided with a tip, the periphery of the core wire is coaxially provided with a flexible tube, the near end of the flexible tube is close to the near end of the flexible tube, the near end of the tip is connected with the first end of at least one control lead, and the second end of the control lead penetrates into the flexible tube and extends out of the near end of the flexible tube.

Preferably, in the direction controllable guide wire, the distal end of the core wire coaxially passes through a first positioning block near the distal end of the flexible tube, and the control wire passes through the first positioning block.

Preferably, in the direction controllable guidewire, the distal end of the tip is hemispherical and is coated with a hydrophilic or hydrophobic coating.

Preferably, in the direction controllable guide wire, the flexible tube is connected with the end head through a tightly wound spring.

Preferably, in the direction controllable guide wire, the outer periphery of the close-wound spring is coated with a polytetrafluoroethylene film or a tpu film, and the surface of the polytetrafluoroethylene film or the tpu film is coated with a hydrophilic coating or a hydrophobic coating.

Preferably, in the direction controllable guide wire, the flexible tube includes a hollow capillary tube body, a spiral slit extending from a distal end to a proximal end of the capillary tube body for a certain distance is formed on a tube wall of the capillary tube body, and a depth of the spiral slit is the same as a wall thickness of the capillary tube body.

Preferably, in the direction-controllable guidewire, the helical slit is an equal-lead helical slit, a decreasing-lead helical slit, or an increasing-lead helical slit

Preferably, in the direction-controllable guide wire, the control wires are a plurality of wires and are distributed in an annular shape at equal intervals.

Preferably, in the direction controllable guide wire, the steering guide wire passes through a second positioning block near the proximal end of the flexible tube.

The utility model discloses technical scheme's advantage mainly embodies:

this scheme simple structure, to control wire connection end and make and control the wire and be located the flexible tube, the crooked characteristic that utilizes the flexible tube on the one hand does not influence the propelling movement of seal wire in the human body, on the other hand can shield controlling the wire effectively, to the injury of human body when avoiding its operation, guarantee its maneuverability simultaneously, can easily change the shape of seal wire distal end through controlling the wire, make the seal wire "turn round" smoothly, therefore can very big reduction operation degree of difficulty, reduce the requirement to operating personnel.

The arrangement of the positioning block can ensure that the operation of controlling the lead wire only turns the head end area of the lead wire and the deformation of other areas is reduced, thereby improving the operability.

Meanwhile, the positioning block can create conditions for accurate positioning of multiple control wires, accurate selection of different control directions can be conveniently carried out, and controllability is improved.

The guide wire of the scheme can be combined with a numerical control device and a cavity channel model, automatic operation can be realized, and the operation difficulty of a doctor in the using process is reduced.

Drawings

Fig. 1 is a cross-sectional view of the present invention;

FIG. 2 is a partial enlarged view of the present invention;

fig. 3 is a schematic view of a first embodiment of a helical kerf of a flexible pipe of the present invention;

fig. 4 is a schematic view of a first embodiment of a helical kerf of a flexible pipe of the present invention;

fig. 5 is a schematic view illustrating a state of the present invention pulling the upper control wire in fig. 1;

fig. 6 is a schematic view illustrating a state of the lower control wire in fig. 1 according to the present invention.

Detailed Description

Objects, advantages and features of the present invention will be illustrated and explained by the following non-limiting description of preferred embodiments. These embodiments are merely exemplary embodiments for applying the technical solutions of the present invention, and all technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the scope of the present invention.

In the description of the embodiments, it should be noted that the terms "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the embodiment, the operator is used as a reference, and the direction close to the operator is a proximal end, and the direction away from the operator is a distal end.

The direction controllable guide wire disclosed in the present invention is explained below with reference to the accompanying drawings, as shown in fig. 1, it includes a core wire 1, the core wire 1 may be made of materials used for core wires of various known guide wire products, such as stainless steel, nickel-titanium alloy, a combination of stainless steel and nickel-titanium alloy, etc., and it may have shapes of various conventional guide wires, for example, it may have a shaping section, a transition section, a supporting section, a pushing rod, etc., and preferably it includes a thick diameter section 11, a taper transition section 12 and a thin diameter section 13, which are sequentially arranged from a proximal end to a distal end (here, when in use, an end held by an operator is a proximal end, and an end far away from the operator is a distal end, i.e., a distal end is an end entering into a human body).

As shown in fig. 1, a tip 2 is disposed at a distal end of the core wire 1, the core wire 1 and the tip 2 may be fixed together by welding, or may be connected by screwing, gluing, or the like, a front end of the tip 2 is hemispherical and coated with a hydrophilic or hydrophobic coating, so that smoothness during pushing may be improved, and the tip 2 may be made of various known metal or polymer materials, which is not limited herein.

As shown in figure 1, the core wire 1 is coaxially provided with a flexible tube 3 with a proximal end adjacent to the proximal end thereof on the periphery, the proximal end of the tip 2 is connected with a first end 41 of at least one control lead 4, and the second end of the control lead 4 penetrates into the flexible tube 3 and extends out of the proximal end of the flexible tube 3.

In order to increase the support of the core wire 1, as shown in fig. 1 and 2, a tightly wound spring 5 is coaxially sleeved on the outer periphery of the core wire 1, one end of the tightly wound spring 5 is connected with the end head 2, and the other end of the tightly wound spring 5 extends to the thick diameter section 11 of the core wire and is connected (e.g. welded) with the distal end of the flexible tube 3. And, the periphery of the close-wound spring 5 is coated with a polytetrafluoroethylene film or a tpu film 7, the surface of the polytetrafluoroethylene film or the tpu film is coated with a hydrophilic coating or a hydrophobic coating 8, and preferably, the surface of the hydrophilic coating or the hydrophobic coating 8 is flush with the outer surface of the flexible tube 3 and the outer surface of the tip 2, that is, the surface of the guide wire is a smooth surface without concave-convex, steps and the like, so that the push is facilitated.

In a more preferred embodiment, the tpu membrane 7 also covers the tip 2 and extends to the wall of the distal end of the flexible tube 3.

The flexible tube 3 may be any known plastic tube or metal tube that can be bent and has good biocompatibility, and in a preferred embodiment, as shown in fig. 3 and 4, the flexible tube 3 preferably includes a capillary tube body 31 made of the metal material, a central hole of the capillary tube body 31 may be designed to be circular, polygonal, or the like according to needs, and an outer diameter of the capillary tube body 31 is 0.35 to 0.81mm, and a length of the capillary tube body 31 is designed according to needs of a specific application scenario.

At this time, the stainless steel tube itself has high strength and rigidity and is not easily bent and deformed, although the capillary body 31 is preferably stainless steel or other commonly used guide wire metal. The pipe wall of the capillary body 31 is formed with a spiral slit 32, the depth of the spiral slit 32 is the same as the wall thickness of the capillary pipe, the spiral slit 32 may be continuous or discontinuous and sectional, preferably continuous, and extends from the distal end to the proximal end of the capillary body 31, and the extension length is designed according to the length of the soft head and the softness and hardness of the soft head, and the slit 32 is formed on the pipe wall, so the rigidity and strength of the pipe body provided with the slit area are reduced, the bending deformation capability is improved, and the required head end flexibility can be obtained.

Also, since different slit designs may have a certain effect on flexibility, the inventor has found that, in a practical embodiment, as shown in fig. 3, the spiral slit 32 has an equal-lead spiral shape, i.e., the lead of each spiral section is L1= L2= L3= L4= … … = Ln, and the tip end region of the capillary body 31 can be bent at a relatively large amplitude and a large angle.

In yet another possible embodiment, as shown in fig. 4, the helical slits 32 may be a decreasing-lead helical or an increasing-lead helical, and it is further preferred that the helical slits 32 are decreasing-lead helical, and the lead of each helical section from the proximal end to the distal end of the capillary tube body 31 satisfies L1= L2x (Δ +1) = L3x (Δ +2) = L4x (Δ +3) … … … = Lnx (Δ + n), wherein the Δ is a value designed according to the length of the soft head and the hardness requirement, at which time the head end region of the capillary tube body 31 can be bent with relatively small amplitude and small angle.

In addition, the different widths of the spiral slits 32 also cause differences in softness of the covered areas, generally speaking, the wider the width of the spiral slits 32, the softer the softness of the processed area, preferably, the width of the spiral slits 32 is 0.01-0.05 mm, because the capillary body itself is small in size, and when the width is too large, the structural strength and rigidity of the capillary body itself are too small, thereby affecting the torque transmission performance, and conversely, the width of the slits is too small, and the softness of the corresponding areas is easy to fail to meet the requirements; also, the width of the spiral slit 32 may be the same or different in different regions, for example, the width of the spiral slit 32 is gradually increased from the proximal end to the distal end, and the region with the larger width is softer.

Meanwhile, after cutting, burrs or sharp parts may exist at the edge of the spiral kerf 32, so that the edge area of the kerf is set to be a fillet, which can effectively reduce the damage of the kerf edge to the cavity during subsequent use, and particularly, the edge of the spiral kerf 32 can be polished after cutting.

Finally, the surface of the capillary body 31 may be further coated with a super-smooth hydrophilic coating and/or a polytetrafluoroethylene layer (not shown), so that the lubricity of the surface of the capillary body 31 can be improved, and the smoothness of pushing can be improved.

In the above-mentioned stainless steel capillary processing, various feasible processes can be adopted, for example, a metal cutting saw, electric discharge machining, laser cutting and the like, preferably laser cutting is adopted, and the specific processing process is as follows:

inputting designed lead parameters (CAD drawings) into a numerical control laser cutting machine, wherein the capillary tube body 31 is driven by a numerical control turntable to rotate according to the requirements of the design parameters, and the laser head is driven by a numerical control platform to translate according to the requirements of the design parameters, so that the capillary tube body 31 is cut by the laser continuously emitted by the laser head to form a set spiral joint-cutting seam; and in the cutting process, the capillary is injected with water for cooling through the connecting device.

Of course, in other embodiments, the laser head may be kept stationary, and the capillary body 31 may be moved in translation and rotation; in addition, the capillary body 31 can be made stationary, and the laser head can be made to perform translational and rotational movements.

Further, in order to ensure that only the head of the distal end of the core wire 1 is changed to reduce the bending of the large diameter section 11 when the manipulation wire 4 is pulled, the distal end of the core wire 1 is passed through a first positioning block 6 near the distal end of the flexible tube 3. Specifically, the first positioning block 6 is fixed in the flexible tube 3, the outer diameter of the first positioning block is equal to the inner diameter of the flexible tube 3, the first positioning block 6 is sleeved outside the large diameter section 11 of the core wire 1 and is fixedly connected with the large diameter section 11, and the control lead 4 passes through the first positioning block 6.

In order to realize adjustment in multiple directions, the control wires 4 are distributed in a ring shape at equal intervals. For example, when the number of the steering wires 4 is two, they are distributed oppositely; when the number of the control leads 4 is three, the control leads are distributed in an equilateral triangle; when the number of the control wires 4 is four, they are distributed in a square shape, and so on.

Since the number of the manipulation wires 4 is increased, it is necessary to accurately distinguish the position of each manipulation guide 4 so as to conveniently determine the corresponding control direction, and therefore, the manipulation wires 4 pass through a second positioning block 9 near the proximal end of the flexible tube 3, the second positioning block 9 has the same structure as the first positioning block and is fixed in the proximal end of the flexible tube 3, and meanwhile, the through holes through which the manipulation wires 4 pass correspond one to one, so that the manipulation direction of the manipulation wires 4 passing through the through holes can be determined by judging the position of each through hole. In addition, the second positioning block 9 can be matched with the first positioning block to position the core wire, so that interference between the core wire 1 and the flexible pipe 3 is avoided.

When the guide wire is used, the front end of the core wire 1 can be bent and turned by pulling the second end of the control wire 4, so that the adjustment of the head direction of the guide wire is realized to effectively reduce the control difficulty, and as shown in figure 5, the front end of the guide wire is bent and turned upwards after the upper control wire 4 is pulled; as shown in fig. 6, the front end of the guide wire is bent downward to turn after pulling the lower steering wire 4.

The utility model has a plurality of implementation modes, and all technical schemes formed by adopting equivalent transformation or equivalent transformation all fall within the protection scope of the utility model.

Claims

1. Controllable direction seal wire, its characterized in that: the flexible pipe comprises a core wire (1), wherein a tip (2) is arranged at the far end of the core wire (1), a flexible pipe (3) with a near end close to the near end of the core wire is coaxially arranged on the periphery of the core wire (1), the near end of the tip (2) is connected with a first end (41) of at least one control lead (4), and a second end of the control lead (4) penetrates into the flexible pipe (3) and extends out of the near end of the flexible pipe (3).

2. The steerable guidewire of claim 1, wherein: the far end of the core wire (1) coaxially passes through a first locating block (6) close to the far end of the flexible pipe (3), and the control lead (4) passes through the first locating block (6).

3. The steerable guidewire of claim 1, wherein: the far end of the tip (2) is hemispherical and is coated with a hydrophilic or hydrophobic coating.

4. The steerable guidewire of claim 1, wherein: the flexible pipe (3) is connected with the end head (2) through a seal wound spring (5).

5. The steerable guidewire of claim 4, wherein: the periphery of the close-wound spring (5) is coated with a polytetrafluoroethylene film or a tpu film (7), and the surface of the polytetrafluoroethylene film or the tpu film is coated with a hydrophilic coating or a hydrophobic coating (8).

6. The steerable guidewire of any of claims 1-5, wherein: the flexible pipe (3) comprises a hollow capillary pipe body (31), a spiral cutting seam (32) extending from the far end to the near end for a certain distance is formed on the pipe wall of the capillary pipe body (31), and the depth of the spiral cutting seam (32) is the same as the wall thickness of the capillary pipe body (31).

7. The steerable guidewire of claim 6, wherein: the spiral slit (32) is in an equal-lead spiral shape, a lead-decreasing spiral shape or a lead-increasing spiral shape.

8. The steerable guidewire of any of claims 1-5, wherein: the control wires (4) are distributed in an annular shape at equal intervals.

9. The steerable guidewire of claim 8, wherein: the control lead (4) passes through a second positioning block (9) close to the proximal end of the flexible tube (3).