Plastic guide wire

Abstract

The utility model discloses a plastic guide wire, and belongs to the technical field of guide wires. The plastic guide wire is characterized by comprising a first flat wire and a second flat wire, a first included angle is formed between the thickness direction of the first flat filament and the thickness direction of the second flat filament; one end face of the transition strip is identical to and in transition connection with the end face of the first flat filament, and the other end face of the transition strip is identical to and in transition connection with the end face of the second flat filament. The guide wire is composed of the first flat wire and the second flat wire which are different in width direction, so that the guide wire can adapt to bending of blood vessels or tissues in one direction within the range of the first flat wire, and can adapt to bending of blood vessels or tissues in the other direction within the range of the second flat wire. Therefore, the whole guide wire can adapt to blood vessels or tissues with complex space structures, the situation that the blood vessels or the tissues are damaged when the guide wire passes through the bending positions of the blood vessels or the tissues is reduced, the human tissues are better protected, and the use safety of the guide wire is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of guide wires, in particular to a plastic guide wire. Background Art

[0002] A guidewire used in human blood vessels or organ tissues generally consists of a guidewire and a winding sleeve over the guidewire. Some guidewires can bend to accommodate curved vessels or tissues. To make it easier to adapt to curved vessels, the guidewire can be ground into a flat shape. However, a flat guidewire can only accommodate a single curved vessel or tissue and is not well suited to vessels or tissues with at least two curves in different directions. Utility Model Content

[0003] The purpose of the utility model is to provide a plastic guide wire to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.

[0004] The technical solution adopted to solve the above technical problems is: a plastic guide wire, characterized in that it includes: a first flat wire; a second flat wire, a first angle is formed between the thickness direction of the first flat wire and the thickness direction of the second flat wire; a transition strip, one end face of which is the same as the end face of the first flat wire and is transitionally connected, and the other end face of which is the same as the end face of the second flat wire and is transitionally connected.

[0005] This technical solution has at least the following beneficial effects: the guide wire is composed of a first flat wire and a second flat wire with different width directions, so that the guide wire can adapt to the bending of blood vessels or tissues in one direction within the range of the first flat wire, and adapt to the bending of blood vessels or tissues in another direction within the range of the second flat wire, so that the guide wire as a whole can adapt to blood vessels or tissues with more complex spatial structures, reduce the possibility of damage to blood vessels or tissues when the guide wire passes through the bending position of blood vessels or tissues, better protect human tissues, and improve the safety of guide wire use.

[0006] As a further improvement to the above technical solution, plug-in blocks are provided at both ends of the transition strip, and one end of each of the first and second flat wires is provided with a plug-in slot for the plug-in block to be inserted into. This plug-in connection facilitates replacement of different transition strips to accommodate connections between first and second flat wires at different first angles, thereby improving the adaptability of the guidewire.

[0007] As a further improvement to the above technical solution, the bottom wall of the insertion slot is provided with a slot having a width greater than that of the insertion slot, and a clamping block adapted to the slot is provided at the end of the insertion block away from the transition strip. By fitting the clamping block into the slot, the connection between the transition strip and the first and second flat wires can be better secured, thereby ensuring the safety of the guidewire during use.

[0008] As a further improvement to the above technical solution, the first angle is 90 degrees. When the angle between the planes where two corners of the planned guidewire insertion trajectory in the blood vessel or tissue are located is between 45 degrees and 90 degrees, the guidewire with the first angle of 90 degrees can be used. When the angle between the planes where two corners of the planned guidewire insertion trajectory in the blood vessel or tissue are located is between zero and 45 degrees, the guidewire with only a single flat structure can be used. Therefore, the guidewire with the first angle of 90 degrees has higher adaptability.

[0009] As a further improvement to the above technical solution, the cross-section of the middle portion of the transition strip is polygonal, and the number of sides of the polygon is greater than or equal to four. The shape of the transition strip affects its flexibility, thereby affecting the passability and safety of the transition strip through the curved position of the blood vessel or tissue. Assuming that the blood vessel or tissue is divided into a first section, a second section, and a third section, the bending direction of the second section relative to the first section is different from the bending direction of the second section relative to the third section. The first flat wire of the guidewire extends into the first section and can smoothly extend into the second section by bending. When the first flat wire needs to extend into the third section, it needs to rotate to an appropriate position to adapt to the bending direction of the third section relative to the second section. At this time, the transition strip also needs to rotate adaptively when extending from the first section to the second section. The transition strip with a polygonal cross-section has better torsion resistance and can maintain the relative angle between the first and second flat wires in the width direction after torsion is completed, thereby ensuring the connection stability of the first and second flat wires, thereby ensuring the functional effect of the guidewire.

[0010] As a further improvement of the above technical solution, the polygon is a quadrilateral. The cross section of the middle portion of the transition strip is a quadrilateral, which makes the transition strip more stable in structure, easier to manufacture and more economical.

[0011] As a further improvement of the above technical solution, the four outer peripheral side surfaces of the transition strip are all concave inwards. The inwardly concave transition strip can improve the overall torsional performance and softness, thereby improving the passability of the guide wire.

[0012] As a further improvement to the above technical solution, the polygon is a straight-sided hexagon or a circle. The cross-section of the middle portion of the transition strip is a straight-sided hexagon or a circle, which allows the transition strip to adapt to connecting the first and second flat wires at various first angles. The transition strip at different first angles can also provide relatively stable safety and passability.

[0013] As a further improvement to the above technical solution, the polygonal shape is a cross. The cross-section of the middle portion of the transition strip is cross-shaped. When the first angle is 90 degrees, the middle portion of the transition strip smoothly transitions to the end faces of the first and second flat wires as it transitions in the direction of the ends. This reduces the overall volume of the transition strip and consumables. Furthermore, the transition strip exhibits improved torsional properties, better adapting to transitions with large angle differences in blood vessels or tissues.

[0014] As a further improvement of the above technical solution, the first flat wire and / or the second flat wire are provided with a plurality of stripes on the wider side thereof, wherein the stripes can facilitate identification of the bendable directions of the first flat wire and the second flat wire, thereby facilitating actual operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0016] Figure 1 This is a schematic diagram of the overall structure of the first embodiment of the present invention;

[0017] Figure 2 This is a structural diagram of the plug-in block and the plug-in slot in the first embodiment of the present utility model;

[0018] Figure 3 a is a schematic structural diagram of the transition strip in the second embodiment of the present utility model;

[0019] Figure 3 b is a schematic cross-sectional view of the middle portion of the transition strip in the second embodiment of the present invention;

[0020] Figure 4 a is a schematic structural diagram of the transition strip in the third embodiment of the present invention;

[0021] Figure 4 b is a schematic cross-sectional view of the middle portion of the transition strip in the third embodiment of the present invention;

[0022] Figure 5 a is a schematic structural diagram of the transition strip in the fourth embodiment of the present utility model;

[0023] Figure 5 b is a schematic cross-sectional view of the middle portion of the transition strip in the fourth embodiment of the present utility model;

[0024] Figure 6 a is a schematic structural diagram of the transition strip in the fifth embodiment of the present invention;

[0025] Figure 6 b is a schematic cross-sectional view of the middle portion of the transition strip in the fifth embodiment of the present invention.

[0026] The first flat wire 10 , the second flat wire 20 , the transition strip 30 , the stripe 40 , the plug-in block 50 , the plug-in slot 51 , the clamping block 60 , and the clamping slot 61 . DETAILED DESCRIPTION

[0027] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0028] In the description of the present invention, it should be understood that descriptions involving orientations, 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. They 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. Therefore, they cannot be understood as limitations on the present invention.

[0029] In the description of this utility model, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0030] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0031] Example 1:

[0032] Reference Figure 1-2 The plastic guide wire includes a first flat wire 10, a second flat wire 20 and a transition strip 30. The flatness of the first flat wire 10 and the second flat wire 20 is in the range of 0.3-0.6. It should be noted that flatness refers to the ratio of the width of the smaller dimension to the length of the larger dimension in the cross section. A first angle is formed between the width direction of the smaller dimension of the first flat wire 10 in the cross section, i.e., the thickness direction, and the width direction of the smaller dimension of the second flat wire 20 in the cross section, i.e., the thickness direction. The first angle is greater than zero and less than or equal to ninety degrees. Preferably, the first angle can be selected from thirty degrees, forty-five degrees, sixty degrees or ninety degrees.

[0033] A plug-in block 50 is integrally formed and connected to the center of each end face of the transition strip 30. The cross-sectional length and width of the plug-in block 50 are both smaller than the length and width of the corresponding end face of the transition strip 30. A clamping block 60 is integrally formed and connected to the end of the plug-in block 50 away from the transition strip 30. The cross-sectional width of the clamping block 60 is greater than the cross-sectional width of the plug-in block 50, so that the two sides of the clamping block 60 protrude beyond the two sides of the plug-in block 50. However, the cross-sectional width of the clamping block 60 is smaller than the width of the corresponding end face of the transition strip 30. The cross-sectional length of the clamping block 60 is the same as that of the plug-in block 50. A plug-in slot 51 is defined in the center of each end face corresponding to the two ends of the first flat wire 10 and the second flat wire 20 to be connected. The plug-in slot 51 is adapted to fit with the plug-in block 50. A clamping slot 61 is defined at the bottom wall of the plug-in slot 51. The clamping slot 61 is adapted to fit with the clamping block 60. The end surfaces of the plug-in block 50 and the transition strip 30 are provided with arc chamfers, and the opening position of the plug-in slot 51 is also provided with an arc chamfer correspondingly.

[0034] When the plug-in blocks 50 and the clamping blocks 60 at both ends of the transition strip 30 are correspondingly inserted into the plug-in slots 51 and the clamping slots 61 at the ends of the first flat wire 10 and the second flat wire 20, the clamping blocks 60 are locked in the clamping slots 61, firmly connecting the transition strip 30 to the first flat wire 10 and the second flat wire 20, thereby ensuring the normal use of the guide wire. The clamping blocks 60 are provided with inclined surfaces on both sides of the end away from the plug-in blocks 50 to facilitate the clamping blocks 60 to be more easily inserted into the clamping slots 61 through the plug-in slots 51. It should be noted that the clamping blocks 60 have a certain elastic deformation capacity. The clamping blocks 60 that meet the required elastic deformation capacity can be made of an elastic material or have a hollow structure formed in the middle of the clamping blocks 60.

[0035] One end face of the transition strip 30 is identical in shape and size to one end face of the first flat filament 10, thereby ensuring a smooth transition after the transition strip 30 is connected to the first flat filament 10. The other end face of the transition strip 30 is identical in shape and size to one end face of the second flat filament 20, thereby ensuring a smooth transition after the transition strip 30 is connected to the second flat filament 20. The first flat filament 10, the second flat filament 20, and the transition strip 30 are coaxially arranged.

[0036] The middle portion of the transition strip 30 has a quadrilateral cross-section, which provides the transition strip 30 with four planar outer side surfaces. This provides the transition strip 30 with improved structural stability, ease of manufacture, and economical efficiency. Multiple stripes 40 are integrally formed side by side on the side with the larger width of the outer side surface of the first flat yarn 10.

[0037] In other embodiments, the stripes 40 may be provided only on the peripheral side surface corresponding to the second flat yarn 20. In other embodiments, the stripes 40 may be provided on the peripheral side surfaces corresponding to the first flat yarn 10 and the second flat yarn 20.

[0038] Before using the guide wire to enter the blood vessel or tissue, the spatial structure of the blood vessel or tissue is first observed through the device, and a transition strip 30 with a suitable first angle is selected to connect the second flat wire 20 and the first flat wire 10 respectively, thereby forming a guide wire that can adapt to blood vessels or tissues with more complex curved structures, reducing the possibility of damage to the blood vessel or tissue when the guide wire passes through the curved position of the blood vessel or tissue, better protecting human tissue, and improving the safety of the guide wire.

[0039] In other embodiments, the plug-in block 50, plug-in slot 51, clamping block 60 and clamping slot 61 structures may not be provided, but the first flat wire 10, the second flat wire 20 and the transition strip 30 may be integrally formed to ensure the reliability of the guide wire.

[0040] Example 2:

[0041] Reference Figure 3 The present embodiment differs from the first embodiment in that the cross-sectional shape of the middle portion of the transition strip 30 is different. The cross-sectional shape of the middle portion of the transition strip 30 in this embodiment is also quadrilateral, but the middle portions of the four sides of the quadrilateral are recessed inward, resulting in the outer peripheral side surfaces of the transition strip 30 being recessed inward in an arc shape. This improves the overall torsional performance and flexibility, thereby enhancing the passability of the guidewire.

[0042] Example 3:

[0043] Reference Figure 4 The present embodiment differs from the first embodiment in that the cross-sectional shape of the middle portion of the transition strip 30 is different. The cross-sectional shape of the middle portion of the transition strip 30 in this embodiment is cross-shaped. When the first angle is 90 degrees, the middle portion of the transition strip 30 smoothly transitions to the end surfaces of the first flat filament 10 and the second flat filament 20 as it transitions along the two ends. This reduces the overall volume of the transition strip 30 and consumables. Furthermore, the transition strip 30 exhibits improved torsional properties, better accommodating transitions with larger angles within blood vessels or tissues.

[0044] Example 4:

[0045] Reference Figure 5 The present embodiment differs from the first embodiment in that the cross-sectional shape of the middle portion of the transition strip 30 is different. The cross-sectional shape of the middle portion of the transition strip 30 in this embodiment is a straight-sided hexagon. This allows the transition strip 30 to adapt to connecting the second flat wire 20 and the first flat wire 10 at various first angles. The transition strip can also provide relatively stable safety and passability at different first angles.

[0046] Embodiment 5:

[0047] Reference Figure 6The present embodiment differs from the first embodiment in that the cross-sectional shape of the middle portion of the transition strip 30 is different. The cross-sectional shape of the middle portion of the transition strip 30 in this embodiment is circular. This allows the transition strip 30 to adapt to connecting the second flat wire 20 and the first flat wire 10 at various first angles. The transition strip can also provide relatively stable safety and passability at different first angles.

[0048] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A plastic guide wire, characterized in that: include: First flat wire; a second flat filament, wherein a first angle is formed between a thickness direction of the first flat filament and a thickness direction of the second flat filament; A transition strip, one end face of which is identical to and transitionally connected to the end face of the first flat wire, and the other end face of which is identical to and transitionally connected to the end face of the second flat wire; plug-in blocks are provided at both ends of the transition strip, and one end of each of the first flat wire and the second flat wire is provided with a plug-in groove for the plug-in block to be embedded in.

2. The plastic guide wire according to claim 1, characterized in that: A clamping slot with a width greater than that of the plugging slot is provided on the bottom wall of the plugging slot, and a clamping block adapted to the clamping slot is provided at one end of the plugging block away from the transition strip.

3. The plastic guide wire according to claim 1, characterized in that: The first angle is ninety degrees.

4. The plastic guide wire according to claim 1, characterized in that: The cross section of the middle portion of the transition strip is a polygon, and the number of sides of the polygon is greater than or equal to four.

5. A plastic guide wire according to claim 4, characterized in that: The polygon is a quadrilateral.

6. A plastic guide wire according to claim 5, characterized in that: The four outer peripheral side surfaces of the transition strip are all concave inwards.

7. The plastic guide wire according to claim 4, characterized in that: The polygon is a straight-edge hexagon or a circle.

8. The plastic guide wire according to claim 4, characterized in that: The polygon is a cross.

9. The plastic guide wire according to claim 1, characterized in that: The first flat yarn and / or the second flat yarn has / have a plurality of stripes arranged side by side on a wider side.

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