Transradial artery blood vessel skin expanding device

Abstract

The utility model provides a transradial artery blood vessel skin expander, which relates to the technical field of interventional medical instruments, and comprises a skin expander main body, the skin expander main body defines a first channel for a guide wire to pass through along the axis direction, the far end of the skin expander main body is provided with a blade, and the first channel is communicated with the blade. A limiting part is arranged on the side, opposite to the blade, of the skin expander body. The blade capable of advancing along the guide wire is adopted to replace a scalpel for skin cutting, compared with the scalpel, the scalpel has the advantages of being light in weight, high in directivity and the like, the limiting part is further arranged to prevent the blade from penetrating into the skin too deep, and blood vessels are prevented from being excessively cut and damaged; the problem that the cutting position and the cutting depth are difficult to control when a scalpel is used for cutting and the problem of tissue tearing caused by insufficient cutting can be solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of interventional medical devices, and in particular relates to a transradial artery vascular skin dilator. Background Art

[0002] In recent years, with the continuous increase in the number of people suffering from cardiovascular and cerebrovascular diseases and the continuous rise in mortality rates, and the high disability rate, most patients are left with symptoms such as hemiplegia and aphasia, which has brought great challenges to clinical surgery. Vascular interventional surgery has the advantages of less trauma, low reaction, and fast recovery. It also has targeted characteristics and can effectively treat vascular diseases. In some areas, it has become the preferred treatment for cardiovascular and cerebrovascular diseases. During the interventional surgery, the first step is to use a vascular puncture sheath to perform arterial puncture to establish the first access to the blood vessels. There are usually two approaches: femoral artery and radial artery. Compared with radial artery access, patients with femoral artery access need to stay in bed after surgery, and their postoperative recovery and comfort are poor. Patients with radial access do not need to stay in bed, and their postoperative recovery and comfort are better than those with femoral artery access. Therefore, radial artery access is becoming more and more popular.

[0003] Usually, during the existing radial artery puncture, the guide wire is retained after the puncture needle is inserted, and a small incision in the skin needs to be made with a scalpel to facilitate the expansion of the skin and guide the puncture sheath into the radial artery. However, during the cutting process, it is difficult for the scalpel incision to cut to the junction of the skin and the guide wire, and the expansion of the skin will tear the uncut part during the entry process; during the process of the expansion of the skin and the puncture sheath entering the blood vessel, the friction is large and the recovery of the surrounding tissue is poor; and the doctor is not good at controlling the cutting depth of the blade during the operation. Therefore, it is necessary to develop a device for cutting the skin to assist the puncture sheath to enter the blood vessel, which can not only accurately complete the skin cutting in one time, but also accurately control the cutting depth of the expansion. Summary of the invention

[0004] The utility model aims to provide a transradial artery vascular skin dilator to replace a scalpel to incise the skin of the treatment area. Compared with a scalpel, the device is easier to control and has a controllable cutting depth, so as to solve the problems of difficult to control cutting depth and poor tissue recovery during radial artery puncture.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A transradial artery vascular dilator comprises a dilator body, wherein the dilator body defines a first channel for a guide wire to pass through along an axial direction, a blade is provided at the distal end of the dilator body, and a limiting portion is provided on the opposite side of the blade.

[0007] Preferably, along the direction of the first channel, the skin expander body has partially or entirely unequal diameters.

[0008] Preferably, the outer diameter of the skin expander body gradually increases toward the proximal end of the skin expander body.

[0009] Preferably, the outer diameter of the distal end portion of the skin expander body gradually increases toward the proximal end of the skin expander body.

[0010] Preferably, the distance between the blade and the distal end of the skin expander body is 3 mm to 10 mm.

[0011] Preferably, a first cutting edge is provided on the distal end side of the blade, and an angle between the first cutting edge and the axis of the skin expander body is less than 90°.

[0012] Preferably, the limiting portion comprises a first protrusion, the first protrusion is connected to the skin expander body, and a side of the first protrusion close to the distal end of the skin expander body is a plane.

[0013] Preferably, a second cutting edge is provided on the proximal side of the blade, and the cutting edge shapes of the first cutting edge and the second cutting edge are independently selected from a straight line or a curve.

[0014] Preferably, the first protrusion is in the shape of a cuboid.

[0015] Preferably, a hemisphere is provided at the end of the limiting portion, and the hemisphere is connected to a side of the first protrusion away from the skin expander body.

[0016] Beneficial effects:

[0017] (1) The present application uses a blade that can move along a guide wire instead of a scalpel to perform skin incision. Compared with a scalpel, the present invention has the advantages of being light in weight and having strong directivity. The first edge of the blade is a bevel. By controlling the depth of the blade entering the skin, the width of the incision can be controlled. A first protrusion is also provided to prevent the blade from penetrating too deeply into the skin and to avoid excessive cutting and damage to blood vessels. This solves the problem of difficulty in controlling the cutting position and cutting depth when using a scalpel to make an incision, as well as the problem of tissue tearing caused by insufficient cutting.

[0018] (2) The distal end or the entirety of the skin expander body adopts an unequal diameter structure, and the outer diameter of the unequal diameter portion gradually increases toward the proximal end, which can reduce the resistance of the skin expander when entering the tissue;

[0019] (3) A second cutting edge is provided on the proximal side of the blade. When the skin expander is withdrawn, if the blade is not withdrawn along the incision, it will generate relatively large resistance and cause tissue tearing. The second cutting edge can cut the tissue along the way during withdrawal, thereby preventing tissue tearing;

[0020] (4) The limiting portion includes a first protrusion for controlling the cutting depth. Since the distal side of the first protrusion is a plane, the limiting portion can trip the outer wall of the blood vessel when the distal end of the skin expander body enters the blood vessel, thereby avoiding excessive cutting depth. The limiting portion also adopts an end surface in the shape of a curved surface, which can reduce resistance and avoid the limiting portion affecting the advancement and retreat of the skin expander. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention. Among them:

[0022] Figure 1 This is a front view of the structure of the radial artery vascular dilator provided in Example 1 of the utility model.

[0023] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0024] Figure 3 Schematic diagram of different structures of blades in embodiments of the present utility model.

[0025] Figure 4 Schematic diagram of skin expander bodies of different shapes in embodiments of the present invention.

[0026] Figure 5 This is a front view of the structure of the radial artery vascular dilator provided in Example 2 of the utility model.

[0027] Figure 6 for Figure 5 Enlarged view of point B in the middle.

[0028] Figure 7 This is a front view of the structure of the radial artery vascular dilator provided in Example 3 of the utility model.

[0029] Figure 8 for Figure 7 Enlarged view of center C.

[0030] Fig. 9 It is a bottom view schematic diagram of the first protrusion in Example 4 of the utility model.

[0031] Fig.10 A schematic diagram of a transradial artery vascular dilator provided in an embodiment of the utility model advancing along a guide wire.

[0032] Fig.11 A schematic diagram of the radial artery vascular dilator provided in an embodiment of the utility model cutting tissue along the way with a blade.

[0033] In the figure: 1, skin expander body; 2, first channel; 3, blade; 4, limit portion; 31, first cutting edge; 32, second cutting edge; 41, first protrusion; 42, hemisphere. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0035] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0036] In the description of the utility model, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more features.

[0038] In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the term "connection" should be understood in a broad sense. For example, it can be a fixed connection or a movable connection, a detachable connection or a non-detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be internal connection between two elements, indirect connection, or an interactive relationship between two elements.

[0039] In the description of the present utility model, “proximal end” refers to an end close to an operator, and “distal end” refers to an end far from an operator.

[0040] In the description of the present utility model, "unequal diameters" includes all situations except "equal diameters" and does not mean that the diameters or radii are unequal in a strict sense.

[0041] The present invention will be described in detail below in conjunction with the embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0042] The utility model aims to solve the problems of difficult control of cutting position and cutting depth and tissue tearing caused by insufficient cutting when using a scalpel to break the skin during radial artery puncture. A transradial artery vascular skin dilator is provided, including a skin dilator body 1, such as Figure 1 , 2 As shown, the skin expander body 1 defines a first channel 2 for the guide wire to pass through along the axial direction, so that the skin expander body 1 can move on the guide wire. A blade 3 is provided at the distal end of the skin expander body 1 for cutting skin and other tissues. A limiting portion 4 is provided on the skin expander body 1 on the opposite side of the blade 3.

[0043] The skin expander body 1 is made of flexible material, such as silicone, rubber, nylon, pebax, etc., which helps the skin expander body 1 to be pushed along the guide wire and bend with the guide wire. If a harder material is used, the guide wire may be deformed and displaced when pushing the skin expander body 1.

[0044] The present application adopts a blade 3 that can move along the guide wire instead of a scalpel for skin cutting. Compared with a scalpel, it has the advantages of light weight and strong directionality. A limiting portion 4 is also provided to prevent the blade 3 from penetrating too deeply into the skin and to avoid excessive cutting and damage to the blood vessels, thereby solving the problem of difficult control of the cutting position and cutting depth when using a scalpel to make an incision, as well as the problem of tissue tearing caused by insufficient cutting.

[0045] In the preferred embodiment of the utility model, Figure 6 As shown, the end surface of the limiting portion 4 is a curved surface, so that the surface transition of the limiting portion 4 is smoother. When the skin expander body 1 is pushed or withdrawn, the resistance between the limiting portion 4 and the tissue along the way can be reduced, and the damage of the limiting portion 4 to the tissue along the way can be reduced.

[0046] In the preferred embodiment of the utility model, Figure 6 As shown, the limiting portion 4 includes a first protrusion 41, which is connected to the skin expander body 1. The side of the first protrusion 41 close to the distal end of the skin expander body 1 is a plane. When the distal end of the skin expander body 1 enters the blood vessel along the guide wire, the plane of the first protrusion 41 can block the outer wall of the blood vessel, thereby preventing the skin expander body 1 from continuing to enter the blood vessel and preventing the blade 3 from further cutting the blood vessel wall.

[0047] The shape of the first protrusion 41 can be a rectangular parallelepiped, a cube, a triangular prism, a polygonal prism, a semi-cylinder or other shapes. In a preferred embodiment of the utility model, the shape of the first protrusion 41 is a rectangular parallelepiped, which has good blocking and limiting effects.

[0048] In the preferred embodiment of the utility model, Figure 8 , 9 As shown, a hemispherical body 42 is provided at the end of the limiting portion 4, and the hemispherical body 42 is connected to a side of the first protrusion 41 away from the skin expander body 1, so that the end surface of the first protrusion 41 presents a curved surface.

[0049] In a preferred embodiment of the utility model, the distance between the blade 3 and the distal end of the skin expander body 1 is 3mm to 10mm (for example, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm). By setting this distance, it is helpful to control the cutting depth of the blade 3. When the distal end of the skin expander body 1 rides on the guide wire and enters the blood vessel, the blade 3 can be prevented from excessively cutting the blood vessel.

[0050] In a preferred embodiment of the utility model, the distal end of the skin expander body 1 or the entire skin expander body 1 is set with unequal diameters, and the outer diameter of the unequal diameter portion gradually increases toward the proximal end of the skin expander body 1. For example, the distal end of the skin expander body 1 has unequal diameters, and the remaining portions have equal diameters. The outer surfaces of the unequal diameter portions are obtained by rotating a conic curve or a straight line around the axis of the skin expander body 1, and the unequal diameter distal end can also be formed by an oblique incision.

[0051] Alternatively, the skin expander body 1 is configured with unequal diameters, and a conic curve or straight line on its outer surface is obtained by rotating around the axis of the skin expander body 1 , and the outer diameter of the skin expander body 1 gradually increases toward the proximal end of the skin expander body 1 .

[0052] Through the above arrangement, on the one hand, it plays a role in controlling the cutting depth of the blade 3, and on the other hand, it can also push away the tissue around the guide wire, thereby reducing the resistance when the skin expander body 1 is pushed.

[0053] In a preferred embodiment of the present invention, the outer diameter of the skin expander body 1 gradually increases toward the proximal end of the skin expander body 1, so as to reduce the pushing resistance.

[0054] In the preferred embodiment of the utility model, Figure 2 , 3 As shown, a first cutting edge 31 is provided on the distal side of the blade 3, and the angle between the first cutting edge 31 and the axis of the skin expander body 1 is less than 90° (e.g., 5°, 10°, 20°, 30°, 40°, 45°, 50°, 60°, 70°, 80°, 85°).

[0055] In the preferred embodiment of the utility model, Figure 3As shown, the proximal side of the blade 3 is provided with a second cutting edge 32, and the cutting edge shapes of the first cutting edge 31 and the second cutting edge 32 are independently selected from a straight line or a curve. By providing the second cutting edge 32, if the back of the blade 3 is blocked by the tissue along the way when the skin expander body 1 is withdrawn, the second cutting edge 32 can be used to cut the tissue along the way, thereby reducing the resistance when the skin expander body 1 is withdrawn, and preventing the back of the blade 3 from tearing the tissue along the way.

[0056] The following is a detailed description of the transradial artery vascular skin dilator of the utility model through specific embodiments.

[0057] Example 1

[0058] This embodiment provides a transradial artery vascular dilator. Figure 4 As shown, the skin expander body 1 includes a skin expander body 1, which defines a first channel 2 for the guide wire to pass through along the axial direction, a blade 3 is provided at the distal end of the skin expander body 1, and a limiting portion 4 is provided on the skin expander body 1 on the opposite side of the blade 3.

[0059] In this embodiment, the portion of the blade 3 exposed from the skin expander body 1 is in the form of a right triangle, a first cutting edge 31 is provided on the distal end of the blade 3, and the first cutting edge 31 is located on the hypotenuse of the exposed portion of the blade 3, that is, the closer to the proximal end of the skin expander body 1, the higher the height of the blade 3, and the greater the depth and width of the incision that can be produced.

[0060] The limiting portion 4 is in the shape of a rectangular parallelepiped, and the surface of its distal end is a plane. When the distal end of the skin expander enters the blood vessel, the distal end of the limiting portion 4 can trip the outer wall of the blood vessel to prevent the skin expander from entering the blood vessel too deeply, thereby controlling the cutting depth and cutting width of the blade 3.

[0061] In this embodiment, the distal end of the skin expander body 1 adopts an unequal diameter structure, and the outer diameter of the distal unequal diameter portion gradually increases toward the proximal direction of the skin expander body 1. More specifically, the surface shape of the unequal diameter portion is obtained by rotating a 1 / 4 ellipse around its major axis.

[0062] This embodiment can significantly reduce the resistance of the skin expander when entering the skin and reduce the damage of the distal end of the skin expander to the tissue along the way by providing a distal end with an outer diameter gradually increasing in the direction toward the proximal end.

[0063] Example 2

[0064] This embodiment provides a transradial artery vascular dilator. Figure 5 As shown, the skin expander body 1 includes a skin expander body 1, which defines a first channel 2 for the guide wire to pass through along the axial direction, a blade 3 is provided at the distal end of the skin expander body 1, and a limiting portion 4 is provided on the skin expander body 1 on the opposite side of the blade 3.

[0065] In this embodiment, the portion of the blade 3 exposed from the skin expander body 1 is in the form of a right triangle, a first cutting edge 31 is provided on the distal end of the blade 3, and the first cutting edge 31 is located on the hypotenuse of the exposed portion of the blade 3, that is, the closer to the proximal end of the skin expander body 1, the higher the height of the blade 3, and the greater the depth and width of the incision that can be produced.

[0066] In this embodiment, the distal end of the skin expander body 1 adopts an unequal diameter structure, and the outer diameter of the distal unequal diameter portion gradually increases toward the proximal direction of the skin expander body 1. More specifically, the surface shape of the unequal diameter portion is obtained by rotating a 1 / 4 ellipse around its major axis.

[0067] In this embodiment, Figure 6 As shown, the limiting portion 4 includes a first protrusion 41 and a hemispherical body 42 located at the end of the limiting portion 4. The first protrusion 41 is connected to the skin expander body 1 and has a rectangular shape with a flat surface on the distal end, while the hemispherical body 42 is connected to the first protrusion 41.

[0068] When the distal end of the skin expander body 1 enters the blood vessel, the distal side of the first protrusion 41 can trip the outer wall of the blood vessel to prevent the distal end of the skin expander body 1 from entering the blood vessel too deeply, thereby controlling the cutting depth and cutting width of the blade 3. At the same time, the hemispherical body 42 stretches the tissue along the way, which can reduce the resistance of the limit part 4 when it moves with the skin expander body 1.

[0069] Example 3

[0070] This embodiment provides a transradial artery vascular dilator. Figure 7 As shown, the skin expander body 1 includes a skin expander body 1, which defines a first channel 2 for the guide wire to pass through along the axial direction, a blade 3 is provided at the distal end of the skin expander body 1, and a limiting portion 4 is provided on the skin expander body 1 on the opposite side of the blade 3.

[0071] In this embodiment, the portion of the blade 3 exposed from the skin expander body 1 is in the form of a right triangle, a first cutting edge 31 is provided on the distal end of the blade 3, and the first cutting edge 31 is located on the hypotenuse of the exposed portion of the blade 3, that is, the closer to the proximal end of the skin expander body 1, the higher the height of the blade 3, and the greater the depth and width of the incision that can be produced.

[0072] In this embodiment, the distal end of the skin expander body 1 adopts an unequal diameter structure, and the outer diameter of the distal unequal diameter portion gradually increases toward the proximal direction of the skin expander body 1. More specifically, the surface shape of the unequal diameter portion is obtained by rotating a 1 / 4 ellipse around its major axis.

[0073] The limiting portion 4 includes a first protrusion 41 and a hemispherical body 42 located at the end of the limiting portion 4. The first protrusion 41 is connected to the skin expander body 1 and has a rectangular shape with a flat surface on the distal end. The hemispherical body 42 is connected to the first protrusion 41.

[0074] In this embodiment, Figure 8 As shown, a second cutting edge 32 is further provided on the proximal side of the blade 3. When the skin expander is withdrawn, if the blade 3 is not withdrawn along the incision, its proximal side will generate greater resistance, affecting the withdrawal of the skin expander and causing tearing of the tissue along the way. By providing the second cutting edge 32, the tissue along the way can be incised, the resistance during withdrawal is reduced, tissue tearing is avoided, and tissue damage is reduced, so as to promote postoperative healing.

[0075] Example 4

[0076] The present embodiment provides a transradial artery vascular dilator, including a dilator body 1, which defines a first channel 2 for a guide wire to pass through along the axial direction, a blade 3 is provided at the distal end of the dilator body 1, and a limiting portion 4 is provided on the dilator body 1 on the opposite side of the blade 3.

[0077] In this embodiment, the portion of the blade 3 exposed from the skin expander body 1 is in the form of a right triangle, a first cutting edge 31 is provided on the distal end of the blade 3, and the first cutting edge 31 is located on the hypotenuse of the exposed portion of the blade 3, that is, the closer to the proximal end of the skin expander body 1, the higher the height of the blade 3, and the greater the depth and width of the incision that can be produced.

[0078] A second cutting edge 32 is also provided on the proximal side of the blade 3. When the skin expander is withdrawn, if the blade 3 is not withdrawn along the incision, its proximal side will generate greater resistance, affecting the withdrawal of the skin expander and causing tearing of the tissue along the way. By providing the second cutting edge 32, the tissue along the way can be incised, reducing the resistance during withdrawal, avoiding tissue tearing, and reducing tissue damage, thereby promoting postoperative healing.

[0079] In this embodiment, the distal end of the skin expander body 1 adopts an unequal diameter structure, and the outer diameter of the distal unequal diameter portion gradually increases toward the proximal direction of the skin expander body 1. More specifically, the surface shape of the unequal diameter portion is obtained by rotating a 1 / 4 ellipse around its major axis.

[0080] The limiting portion 4 includes a first protrusion 41 and a hemispherical body 42 located at the end of the limiting portion 4 . The first protrusion 41 is connected to the skin expander body 1 , and the surface of the distal end thereof is a plane, while the hemispherical body 42 is connected to the first protrusion 41 .

[0081] In this embodiment, Fig. 9 As shown, the proximal side of the first protrusion 41 is a curved surface. Since the first protrusion 41 is not needed for limiting when withdrawing the skin expander, setting it as a curved surface can further reduce the resistance during withdrawal.

[0082] In summary:

[0083] The present application adopts a blade 3 that can move along the guide wire instead of a scalpel for skin cutting. Compared with a scalpel, it has the advantages of light weight and strong directionality. The first cutting edge 31 of the blade 3 is a bevel. By controlling the depth of the blade 3 entering the skin, the width of the incision can be controlled. A limiting portion 4 is also provided to prevent the blade 3 from penetrating too deeply into the skin and to avoid excessive cutting and damage to the blood vessels, thereby solving the problem of difficult control of the cutting position and cutting depth when using a scalpel to make an incision, as well as the problem of tissue tearing caused by insufficient cutting.

[0084] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A transradial artery vascular dilator, characterized in that: The invention comprises a skin expander body, wherein the skin expander body defines a first channel for the guide wire to pass through along the axial direction, a blade is arranged at the distal end of the skin expander body, and a limiting part is arranged at the opposite side of the blade.

2. A transradial artery vascular dilator according to claim 1, characterized in that: Along the direction of the first channel, the skin expander body has partially or entirely unequal diameters.

3. A transradial artery vascular dilator according to claim 2, characterized in that: The outer diameter of the skin expander body gradually increases toward the proximal end of the skin expander body.

4. A transradial artery vascular dilator according to claim 3, characterized in that: The outer radial direction of the distal end portion of the skin expander body gradually increases toward the proximal end of the skin expander body.

5. The transradial artery vascular dilator according to claim 1, characterized in that: The distance between the blade and the distal end of the skin expander body is 3 mm to 10 mm.

6. A transradial artery vascular dilator according to any one of claims 1 to 5, characterized in that: A first cutting edge is provided on the distal end side of the blade, and an angle between the first cutting edge and the axis of the skin expander body is less than 90°.

7. A transradial artery vascular dilator according to any one of claims 1 to 5, characterized in that: The limiting portion includes a first protrusion, the first protrusion is connected to the skin expander body, and a side of the first protrusion close to the distal end of the skin expander body is a plane.

8. The transradial artery vascular dilator according to claim 6, characterized in that: A second cutting edge is disposed on the proximal side of the blade, and the cutting edge shapes of the first cutting edge and the second cutting edge are independently selected from a straight line or a curved line.

9. The transradial artery vascular dilator according to claim 7, characterized in that: The first protrusion is in the shape of a cuboid.

10. The transradial artery vascular dilator according to claim 9, characterized in that: A hemisphere is disposed at the end of the limiting portion, and the hemisphere is connected to a side of the first protrusion away from the skin expander body.

Images