CN114796819A - A kind of expander - Google Patents

Abstract

The invention provides a dilator, comprising: a rod body and a controller, one end of the rod body is connected with the controller; the rod body is provided with a first cavity and a second cavity, the first cavity is connected with both ends of the rod body, and the second cavity The two ends of the rod are communicated; the first cavity is used to pass the guide wire, and the second cavity is provided with a bending wire; the end of the controller away from the rod is provided with a first inlet that communicates with the first cavity, and the controller One end away from the rod body is also provided with a second inlet which is communicated with the second cavity, and the end of the rod body which is away from the controller is provided with a first outlet which is communicated with the first cavity; The other end of the wire is connected with the end of the rod body away from the controller through the second cavity; the controller is used to control the expansion and contraction of the bending wire. In the present invention, the rod body is provided with a second cavity and a bending control wire, and the rod body can be controlled to bend actively through the controller, thereby reducing the risk of puncturing the blood vessel.

Description

a dilator

technical field

The invention relates to the technical field of medical devices, in particular to a dilator.

Background technique

As the population ages, the number of patients with structural heart disease is also increasing. In addition to structural heart disease, patients are usually accompanied by some vascular diseases, and blood vessels need to be dilated to treat the disease. In the prior art, blood vessels are mainly dilated by dilators. However, the dilator in the prior art cannot adjust the curvature at the distal end, mainly by adapting to the curvature of the inner wall of the blood vessel. Since the blood vessels of patients are more fragile than healthy people, there is a greater risk of puncturing the blood vessels due to the excessive hardness of the dilator. Not conducive to the treatment of patients.

It can be seen that there is a problem that the dilator has a relatively high risk of puncturing the blood vessel in the related art.

SUMMARY OF THE INVENTION

Embodiments of the present invention provide a dilator to solve the problem in the related art that the dilator has a high risk of puncturing a blood vessel.

To achieve the above purpose, an embodiment of the present invention provides a dilator, comprising: a rod body and a controller, wherein,

One end of the rod body is connected with the controller;

The rod body is provided with a first cavity and a second cavity, the first cavity communicates with both ends of the rod body, and the second cavity communicates with both ends of the rod body;

The first cavity is used to pass the guide wire, and the second cavity is provided with a bending control wire;

One end of the controller away from the rod body is provided with a first inlet that communicates with the first cavity, and one end of the rod body away from the controller is provided with a first inlet communicated with the first cavity. an export;

One end of the bending control wire is connected to the controller, and the other end of the bending control wire is connected to the end of the rod body away from the controller through the second cavity;

The controller is used to control the expansion and contraction of the bending control wire.

As an optional implementation manner, the rod body is further provided with a third cavity, and the third cavity communicates with both ends of the rod body;

The end of the controller away from the rod body is provided with a second inlet that communicates with the third cavity, and the end of the rod body away from the controller is provided with a second inlet communicated with the third cavity. Export;

The third cavity is used to deliver the contrast agent.

As an optional implementation manner, the rod body includes a first section, a second section and a third section, and the rod body is the first section and the second section in order in the direction away from the controller and said third paragraph;

The hardness of the first segment, the hardness of the second segment, and the hardness of the third segment decrease.

As an optional implementation manner, the rod body is provided with a developing ring at one end of the rod body away from the controller, and the bending control wire is connected and fixed with the developing ring.

As an optional implementation manner, the material of the developing ring is stainless steel, and the material of the bending control wire is stainless steel.

As an optional implementation manner, one end of the rod body away from the controller is configured to be tapered.

As an optional embodiment, the material of the rod body is a polytetrafluoroethylene material containing barium salt.

As an optional embodiment, the surface of the rod body is provided with a coating, and the coating is a polyvinylpyrrolidone hydrophilic material.

As an optional implementation manner, a knob is provided on the surface of the controller, the knob is rotatably connected to the controller, and the bending control wire is wound around the surface of the knob to be fixed.

One of the technical solutions in the above-mentioned technical solutions has the following advantages or beneficial effects:

In the embodiment of the present invention, the rod body is provided with a first cavity and a second cavity, and a bending control wire is set in the second cavity, so that the operator can control the bending control wire to expand and contract through the controller, and drive the rod body to bend and change. During the process, the risk of the blood vessel being punctured by the rod can be reduced.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the drawings that are used in the description of the embodiments of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative labor.

FIG. 1 is a schematic structural diagram of a natural state of a dilator provided by an embodiment of the present invention;

2 is a schematic structural diagram of a dilator in a bent state according to an embodiment of the present invention;

3 is a schematic structural diagram of a natural state of another dilator provided by an embodiment of the present invention;

4 is a schematic structural diagram of another dilator in a natural state provided by an embodiment of the present invention;

5 is a schematic structural diagram of a distal end of a rod body provided by an embodiment of the present invention;

6 is a schematic diagram of the connection between the bending control wire and the developing ring provided by the embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Please refer to FIG. 1 . FIG. 1 is a schematic structural diagram of a dilator in a natural state provided by an embodiment of the present invention. As shown in FIG. 1 , an embodiment of the present invention provides a dilator, including: a rod body 20 and a controller 10 , in,

One end of the rod body 20 is connected with the controller 10;

The rod body 20 is provided with a first cavity 201 and a second cavity 202, the first cavity 201 communicates with both ends of the rod body 20, and the second cavity 202 communicates with both ends of the rod body 20;

The first cavity 201 is used to pass the guide wire, and the second cavity 202 is provided with a bending control wire;

One end of the controller 10 away from the rod body 20 is provided with a first inlet 101 communicating with the first cavity 201, and one end of the rod body 20 away from the controller 10 is provided with a first outlet 204 communicating with the first cavity 201;

One end of the bending control wire is connected to the controller 10, and the other end of the bending control wire is connected to the end of the rod body 20 away from the controller 10 through the second cavity 202;

The controller 10 is used to control the expansion and contraction of the bending wire.

In this embodiment, a second cavity 202 is provided in the rod body 20, and a bending control wire is provided in the second cavity 202, and the controller 10 controls the expansion and contraction of the bending control wire, thereby driving the distal end of the rod body 20 to bend or extend straight. The distal end is the end of the rod body 20 away from the controller 10, and the distal end is the end close to the blood vessel during the process of implanting the dilator into the blood vessel. The operator manipulates the stretching of the bending wire through the controller 10, which can effectively reduce the risk of the inside of the blood vessel being punctured.

Among them, as shown in FIG. 2, in the natural state, the rod body 20 is kept in a straight state, and the bending control wire is also in a relaxed state at this time; when it needs to be bent, the controller 10 controls the bending control wire to shrink, and the bending control wire controls the far The rod body 20 at the end is bent toward the side, and the bending degree can be adjusted according to the shrinkage of the bending control wire. The greater the shrinkage, the greater the bending degree of the distal end.

In addition, the guide wire provided in the first cavity 201 plays a guiding role when the dilator is injected into the blood vessel. The guide wire passes through the controller 10 and the rod body 20 through the first inlet 101 and the first outlet 204, and can The rod body 20 is guided at the distal end. The guide wire is made of a soft enough material, which can be bent along the inner wall of the blood vessel, so as to prevent the guide wire from puncturing the blood vessel.

Wherein, the rod body 20 is processed and formed by an extrusion process, and the processed first cavity 201 and the second cavity 202 are closed channels. The size of the first cavity 201 is adapted to the size of the guide wire, and the guide wire can smoothly move in the first cavity 201; similarly, the size of the second cavity 202 is adapted to the size of the bending control wire, and the bending control The wire can move within the second cavity 202 smoothly.

As an optional embodiment, the rod body 20 is further provided with a third cavity 203, and the third cavity 203 communicates with both ends of the rod body 20;

One end of the controller 10 away from the rod body 20 is provided with a second inlet 102 communicating with the third cavity 203, and one end of the rod body 20 away from the controller 10 is provided with a second outlet 205 communicating with the third cavity 203;

The third cavity 203 is used to deliver the contrast agent.

In this embodiment, by injecting a contrast agent into the blood vessel through the third cavity 203, the blood vessel can be visualized under the rays, which is convenient for the operator to observe the blood circuit condition, so as to control the relative position of the dilator and the blood circuit more accurately, and reduce the damage of the blood vessel. Risk of puncture.

Wherein, the contrast agent is injected into the dilator through the second inlet 102 of the controller 10, the distal end of the dilator is provided with a second outlet 205, the contrast agent is injected into the blood vessel through the second outlet 205, and the blood vessel that needs to be implanted with the dilator is injected into the blood vessel. development.

As an optional embodiment, the rod body 20 includes a first section 21 , a second section 22 and a third section 23 , and the rod body 20 is a first section 21 , a second section 22 and a third section 21 in the direction away from the controller 10 in sequence. 3rd paragraph 23;

The hardness of the first segment 21 , the hardness of the second segment 22 and the hardness of the third segment 23 decrease gradually.

In this embodiment, the rod body 20 is set to three sections with decreasing hardness, so that the rod body 20 can be better bent during the implantation process, thereby reducing the risk of the blood vessel being punctured.

Among them, the hardness of the first segment 21 and the second segment 22 is relatively large, and can effectively conduct force transmission; while the hardness of the third segment 23 is the smallest, the radial strength is smaller, and it can be bent more easily.

The rod body 20 can be provided with different diameters to match different blood vessels of different patients. In this example, the maximum diameter of the rod body 20 is 20F, and the minimum diameter of the rod body 20 is 12F. Where F is the unit of the catheter, 1F≈0.33mm.

In addition, in this embodiment, the rod body 20 can also be set as a tapered structure with decreasing diameter, the diameter of the end close to the controller 10 is the largest, and the diameter of the end away from the controller 10 is the smallest, as shown in FIG. 3 . The diameter of the end of the rod body 20 away from the controller 10 is the smallest, the radial strength is smaller, and it can be bent more easily; meanwhile, the end of the rod body 20 close to the controller 10 has a larger diameter and can effectively dilate blood vessels.

The maximum diameter of the rod body 20 of the tapered structure is 20F, and the minimum diameter of the rod body 20 of the tapered structure is 12F.

In addition, in this embodiment, the rod body 20 can also be set as two sections of a cone with a decreasing diameter and a cylinder, the end close to the controller 10 is the cone with the largest diameter, and the end away from the controller 10 is the cylinder with the smallest diameter, as shown in the figure 4 shown. The diameter of the end of the rod body 20 away from the controller 10 is the smallest, which can reduce the radial strength and be easier to bend; meanwhile, the end of the rod body 20 close to the controller 10 has a larger diameter and can effectively dilate blood vessels.

The maximum diameter of the rod body 20 of the tapered structure is 20F, the minimum diameter of the rod body 20 of the tapered structure is 16F, and the diameter of the cylinder is 12F.

As an optional embodiment, as shown in FIG. 5 , the rod body 20 is provided with a developing ring 24 at one end of the rod body 20 away from the controller 10 , and the bending control wire is connected and fixed with the developing ring 24 .

In this embodiment, the imaging ring 24 can be visualized in the radiation, and the operator can determine the specific position of the distal end of the dilator according to the imaging ring 24 . After observing the inner wall of the blood vessel and the position of the developing ring 24, the controller 10 controls the bending of the rod body 20, which can effectively reduce the risk of the dilator puncturing the blood vessel.

The bending control wire is fixed on the developing ring 24 , and the expansion and contraction of the bending control wire can be converted into a radial pulling force through the developing ring 24 to realize the bending of the distal end of the rod body 20 .

As an optional embodiment, the material of the developing ring 24 is stainless steel, and the material of the bending control wire is stainless steel.

In this embodiment, the materials of the developing ring 24 and the bending control wire are all stainless steel materials, which can be developed in rays while maintaining the structural strength. Wherein, the stainless steel material can be 304 stainless steel, and can also be other materials with the same effect.

The bending control wire is only connected to one part of the developing ring 24 , and the connection position between the bending control wire and the developing ring 24 is marked on the controller 10 , and the mark is the opposite direction of the bending of the rod body 20 , as shown in FIG. 6 . The connection position between the bending control wire and the developing ring 24 is fixed and marked, so as to prevent the situation that the inner wall of the blood vessel is punctured due to the inconsistency of the bending direction of the dilator with the assumption caused by the operator's misoperation.

As an optional implementation manner, the end of the rod body 20 away from the controller 10 is tapered.

In this embodiment, the end of the rod body 20 away from the controller 10 is tapered, which can reduce the risk of puncturing the blood vessel when the distal end of the rod body 20 is in contact with the inner wall of the blood vessel.

As an optional embodiment, the material of the rod body 20 is a polytetrafluoroethylene material containing barium salt.

In this embodiment, since the rod body 20 needs to be implanted into a blood vessel, a material with high hardness such as stainless steel cannot be used. The rod body 20 is made of polytetrafluoroethylene containing barium salt, so that the rod body 20 can bend in the blood vessel, and the inner wall of the blood vessel will not be punctured due to the excessive hardness of the rod body 20 when it contacts the inner wall of the blood vessel.

Among them, the barium salt can be visualized in the radiation, which is convenient for the operator to judge the position of the dilator in the blood vessel.

As an optional embodiment, the surface of the rod body 20 is provided with a coating, and the coating is a polyvinylpyrrolidone hydrophilic material.

In this embodiment, the surface of the rod body 20 is provided with a hydrophilic coating, which can effectively reduce the frictional force received by the dilator during the implantation process, and reduce the difficulty of implantation of the dilator or the excessive force of the operator caused by excessive frictional force. A large puncture of the lining of a blood vessel occurs.

As an optional embodiment, the surface of the controller 10 is provided with a knob 11 , the knob 11 is rotatably connected to the controller 10 , and the bending wire is wound around the surface of the knob 11 to be fixed.

In this embodiment, the stretching of the control wire can be controlled by rotating the knob 11, so that the operator can control the stretching of the distal end of the dilator at the proximal end.

In addition, the controller 10 may also be provided with a movable slider to connect one end of the bending control wire with the movable slider, which can also achieve the effect of the operator controlling the stretching of the distal end of the dilator at the proximal end.

It should be noted that, herein, the terms "comprising", "comprising" or any other variation thereof are intended to encompass non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements, It also includes other elements not expressly listed or inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element.

The embodiments of the present invention have been described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific embodiments, which are merely illustrative rather than restrictive. Under the inspiration of the present invention, without departing from the spirit of the present invention and the scope protected by the claims, many forms can be made, which all belong to the protection of the present invention.

Claims (9)

1. A dilator, characterized in that, comprising: a rod body and a controller, wherein, One end of the rod body is connected with the controller; The rod body is provided with a first cavity and a second cavity, the first cavity communicates with both ends of the rod body, and the second cavity communicates with both ends of the rod body; The first cavity is used to pass the guide wire, and the second cavity is provided with a bending control wire; The end of the controller away from the rod body is provided with a first inlet that communicates with the first cavity, and the end of the rod body away from the controller is provided with a first inlet communicated with the first cavity. Export; One end of the bending control wire is connected to the controller, and the other end of the bending control wire is connected to the end of the rod body away from the controller through the second cavity; The controller is used to control the expansion and contraction of the bending control wire. 2 . The dilator according to claim 1 , wherein the rod body is further provided with a third cavity, and the third cavity communicates with both ends of the rod body; 3 . The end of the controller away from the rod body is provided with a second inlet that communicates with the third cavity, and the end of the rod body away from the controller is provided with a second inlet communicated with the third cavity. Export; The third cavity is used to deliver the contrast agent. 3 . The dilator according to claim 1 or 2 , wherein the rod body comprises a first section, a second section and a third section, and the rod body is in turn the direction away from the controller in the direction away from the controller. 4 . the first paragraph, the second paragraph and the third paragraph; The hardness of the first segment, the hardness of the second segment, and the hardness of the third segment decrease. The dilator according to claim 1 or 2, characterized in that, a developing ring is provided on the end of the rod body away from the controller, and the bending control wire is connected and fixed with the developing ring. 5 . The dilator according to claim 5 , wherein the developing ring is made of 304 stainless steel, and the bending control wire is made of stainless steel. 6 . 6 . The dilator according to claim 1 or 2 , wherein the end of the rod body away from the controller is tapered. 7 . 7. The dilator according to claim 1 or 2, wherein the material of the rod body is a polytetrafluoroethylene material containing barium salt. 8. The dilator according to claim 1 or 2, wherein the surface of the rod body is provided with a coating, and the coating is a polyvinylpyrrolidone hydrophilic material. 9 . The dilator according to claim 1 , wherein a knob is provided on the surface of the controller, the knob is rotatably connected to the controller, and the bending wire is wound around the knob. 10 . Surface fixed.

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