CN219375824U - Integrated interventional guide wire - Google Patents

Abstract

The utility model discloses an integrated interventional guide wire which is of an integrated structure and comprises a guide wire head end, a soft section and a guide wire main body which are sequentially arranged along the axial direction of the guide wire head end, wherein the outer diameter of the guide wire head end and the outer diameter of the guide wire main body are larger than the outer diameter of the soft section. The interventional guide wire has the characteristics of low processing difficulty and difficult fracture.

Description

Integrated interventional guide wire

Technical Field

The utility model relates to the technical field of medical instrument supplies, in particular to an integrated interventional guide wire.

Background

The interventional guide wire is a common instrument used in puncture operation, after the puncture needle penetrates into a blood vessel, the interventional guide wire is inserted into the puncture needle and gradually enters the blood vessel, the interventional guide wire exits the puncture needle when reaching a preset position, then a catheter, a catheter sheath, an expansion tube and the like are guided into the preset position through the interventional guide wire, and then the interventional guide wire exits, so that the puncture process is completed.

At present, the common interventional guide wire on the market is shown as a Chinese patent CN20151233651. X and comprises a core wire, a safety wire and a winding wire, wherein the core wire and the safety wire are wrapped by the winding wire, the head end of the safety wire is connected with the head end of the winding wire, and the tail end of the core wire, the tail end of the safety wire and the tail end of the winding wire are connected together. The interventional guide wire of this construction must possess two features: (1) The head end of the interventional guide wire needs to enter the blood vessel, and the interventional guide wire has to have certain softness in order to avoid damage to the blood vessel, tissue cells in the blood vessel and the like, so that the safety wire is manufactured to be thin. (2) When the outer diameter of the interventional guide wire is less than 0.4mm, the wire diameter of the wire winding is typically 0.05mm, i.e. the wire winding must also be made very fine.

However, the extremely fine wire winding is difficult to manufacture, and is easily sheared by the needle tip of the puncture needle to break and wire drawing, and meanwhile, the contact area of the welding part of the thinner safety wire and the end of the interventional guide wire head is small and is easily broken, so that the interventional guide wire with the structure is easily broken and wire drawing and other medical accidents are caused.

Disclosure of Invention

In order to overcome at least one defect in the prior art, the utility model provides an integrated interventional guide wire which has the characteristics of low processing difficulty and difficult fracture.

The utility model adopts the technical proposal for solving the problems that:

the utility model provides a seal wire is intervened to integral type, its structure as an organic whole, includes seal wire head end, soft section and the seal wire main part that sets gradually along its axial, and the external diameter of seal wire head end and the external diameter of seal wire main part are all greater than the external diameter of soft section.

The interventional guide wire is designed into an integrated structure, on one hand, the outer surface is not provided with extremely fine wire winding, so that the manufacturing difficulty is reduced, and the interventional guide wire is not easily sheared to fracture or wire drawing by the needle point of the puncture needle; on the other hand, the problem of welding firmness of the thinner safety wire and the intervention wire guiding head end in the prior art is not needed to be considered, and the integrated structure is stable enough and is not easy to break. Therefore, the integrated structure of the intervention guide wire not only reduces the manufacturing difficulty and simplifies the manufacturing process, but also has enough and stable structure, is not easy to break or wire, and has the tensile strength and the shearing strength which are more than 2 times of those of the intervention guide wire with wire winding in the prior art under the same outer diameter.

Further, the end face of the guide wire head end, which is away from the soft section, is of an arc-shaped structure.

Further, the guide wire head end is a hemispherical structure, and the convex part of the hemispherical structure faces away from the soft section.

Further, a transition section is arranged between the soft section and the guide wire main body, and the outer diameter of the transition section gradually decreases from the guide wire main body to the soft section.

Further, the outer diameter of the guide wire head end is equal to the outer diameter of the guide wire body.

Further, the length of the soft segment is 3cm-7cm.

Further, the outer diameter of the soft segment is less than 0.2mm.

Further, a reducing section is arranged between the guide wire head end and the soft section, and the outer diameter of the reducing section gradually decreases from the guide wire head end to the soft section.

Further, the length of the reducing section is 1mm-2mm.

Further, a straight section is arranged between the reducing section and the end of the thread guiding head.

Further, the outer diameter of the straight section is equal to the outer diameter of the guidewire body.

Further, the length of the straight section is less than 1.5mm.

Drawings

FIG. 1 is a schematic view showing the structure of an interventional guide wire according to embodiment 1 of the present utility model;

fig. 2 is a schematic structural view of an interventional guide wire according to embodiment 2 of the present utility model.

Wherein the reference numerals have the following meanings:

1. a guidewire tip; 2. a soft segment; 3. a guidewire body; 4. a transition section; 5. a reducing section; 6. a straight section.

Detailed Description

For a better understanding and implementation, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model.

In the description of the present utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

Example 1

Referring to fig. 1, an integrated interventional guide wire of the present embodiment is an integrated structure, and the material may be selected from stainless steel, nickel-titanium alloy, copper-zinc alloy, nickel-chromium alloy, etc. In the direction shown in fig. 1, the left end is the head end of the interventional guide wire, the right end can extend to the tail end of the interventional guide wire, and the guide wire head end 1, the soft section 2 and the guide wire main body 3 are sequentially arranged from the head end to the tail end along the axial direction of the interventional guide wire.

Because the head end of the interventional guide wire needs to enter the blood vessel, in order to avoid damage to the blood vessel, tissue cells in the blood vessel and the like, the head end of the interventional guide wire is required to have both softness and roundness, so the following settings are carried out in the embodiment:

first, the end face of the guide wire head end 1 facing away from the soft section 2 is of an arc-shaped structure, so that the guide wire head end has certain flexibility and smooth surface, can smoothly enter into a blood vessel, and can not damage the blood vessel, tissue cells in the blood vessel and the like. Specifically, the guide wire head end 1 of the present embodiment has a hemispherical structure, and the convex portion of the hemispherical structure faces away from the soft segment 2.

Second, the soft segment 2 is a small outer diameter structure with the length of 3cm-7cm and the outer diameter of less than 0.2mm, the outer diameter size can ensure that the soft segment 2 is soft enough, and the length range can ensure that the head end of an interventional guide wire entering into a blood vessel is soft, so that the blood vessel and tissue cells and the like in the blood vessel cannot be damaged. The guide wire head end 1 cannot be of a small outer diameter structure, otherwise, the head end is sharp, and the blood vessel and tissue cells in the blood vessel are easily damaged. Also, the guide wire body 3 must have a sufficiently strong rigidity as a supporting body of the interventional guide wire, and thus, the guide wire body 3 has a large outer diameter structure.

Therefore, the interventional guide wire of the present embodiment is designed in a structure that the outer diameter of the guide wire head end 1 and the outer diameter of the guide wire main body 3 are both larger than the outer diameter of the soft segment 2. The outer diameter of the guide wire end 1 and the outer diameter of the guide wire main body 3 are designed specifically, so long as the guide wire main body 3 has a good supporting function, the head end of the guide wire end 1 is smooth enough and does not damage blood vessels and tissue cells in the blood vessels, and the outer diameter of the guide wire end and the outer diameter of the core wire can be designed according to the prior art.

In order to facilitate processing and reduce manufacturing difficulty, the outer diameter of the guide wire head end 1 of the present embodiment is equal to the outer diameter of the guide wire body 3. And be equipped with the changeover portion 4 that is used for connecting the two between soft section 2 and the seal wire main part 3, the tip external diameter of seal wire main part 3 is connected to changeover portion 4 is equal with the external diameter of seal wire main part 3, the tip external diameter of changeover portion 4 connection soft section 2 equals with the external diameter of soft section 2, and the external diameter of changeover portion 4 reduces gradually from seal wire main part 3 to soft section 2 to make between seal wire main part 3 and the soft section 2 not direct external diameter change, but external diameter reduces gradually, not only convenient processing, but also the rigidity of seal wire main part 3 and the compliance of soft section 2. In particular, the transition piece 4 can be designed in the shape of a truncated cone.

For the connection relation between the guide wire head end 1 and the soft segment 2, if the guide wire head end 1 and the soft segment 2 are directly connected, a platform perpendicular to the axial direction of the interventional guide wire can appear at the connection part of the guide wire head end 1 and the soft segment due to the direct diameter change, and the platform is easily sheared by the puncture needle to break. Therefore, the reducing section 5 for connecting the two is arranged between the guide wire head end 1 and the soft section 2 in the embodiment, the outer diameter of the end part of the reducing section 5 connected with the soft section 2 is equal to the additional diameter of the soft section 2, the outer diameter of the end part of the reducing section 5 connected with the guide wire head end 1 is equal to the outer diameter of the guide wire head end 1, and the outer diameter of the reducing section gradually decreases from the guide wire head end 1 to the soft section 2, so that the outer diameter between the soft section 2 and the guide wire head end 1 is not changed directly, but gradually decreases, the processing difficulty is reduced, and the defect of easy breakage caused by direct change of the outer diameter is avoided.

Specifically, the reducing section 5 may be designed into a truncated cone shape, or any other shape with a smooth transition of the outer surface according to actual needs. It is emphasized that the outer surface of the reducing section 5 must be smoothly transited from the guide wire head end 1 to the soft section 2, and structures such as concave and convex cannot occur, otherwise, the tip of the puncture needle is easy to cut or scratch the reducing section 5 to damage the interventional guide wire, and even medical accidents are caused.

The length of the reducing section 5 of this embodiment is 1mm-2mm, and the setting of reducing section 5 of this length range can guarantee that reducing section 5 wears out the pjncture needle point completely in conventional puncture operation, and soft section 2 at least has part to wear out the pjncture needle point, and at this moment, the pjncture point department is soft section 2, and soft section 2 can carry out corresponding deformation according to the state of pjncture needle when the pjncture needle withdraws to the pjncture point can not produce shearing or fish tail to it.

It should be noted that, since the outer diameter of the most part of the variable diameter section 5 is larger than the outer diameter of the soft section 2, so that the rigidity is higher than that of the soft section 2, but since the length is only 1mm-2mm, the ratio of the variable diameter section 5 is small compared with that of the soft section 2 with the length of 3cm-7cm, and the softness of the head end of the interventional guide wire is not affected.

Above, according to the foregoing statement for the interventional guide wire of the present embodiment, the interventional guide wire of the present embodiment does not contain the winding wire in the prior art, so that the condition that the interventional guide wire is easily sheared to break or wire-drawn by the needle tip of the puncture needle does not occur, and the manufacturing difficulty is obviously reduced without producing an extremely fine winding wire. In addition, the interventional guide wire of this embodiment is an integral structure, need not consider the problem of each branch piece junction firmness among the prior art, and integral structure is enough firm, is difficult to take place the fracture. Therefore, the integrated structure of the interventional guide wire of the embodiment not only reduces the manufacturing difficulty and simplifies the manufacturing process, but also has enough stable structure, is not easy to break or wire, and has the tensile strength and the shearing strength which are more than 2 times of those of the interventional guide wire with wire winding in the prior art under the same outer diameter.

Example 2

Referring to fig. 2, this embodiment also discloses an integrated interventional guide wire, which differs from embodiment 1 in that: a straight section 6 is arranged between the reducing section 5 and the thread guiding end 1.

Because the guide wire head end 1 is of a hemispherical structure, if the guide wire head end is directly connected with the reducing section 5, the manufacturing difficulty is increased to a certain extent, and the risk of easy breakage exists. In the embodiment, the straight section 6 is arranged between the reducing section 5 and the thread guiding end 1 for transition, so that the manufacturing is convenient, and the stability of the interventional thread guiding structure is improved.

Preferably, the outer diameter of the straight section 6 of the embodiment is equal to the outer diameter of the guide wire main body 3 and the outer diameter of the guide wire head end 1, so that the manufacturing difficulty is greatly reduced.

It should be noted that the design of the straight section 6 can not affect the softness of the end of the insertion guide while reducing the manufacturing difficulty and improving the structural stability. Thus, the length of the straight section 6 of this embodiment is less than 1.5mm, and the total length of the straight section 6 and the variable diameter section 5 is not more than 3.5mm. In conventional puncture operation, the setting of this length scope can guarantee that reducing section 5 and straight section 6 all wear out the needle point of pjncture needle, and soft section 2 at least partly wear out the needle point, and this moment, the needle point department is soft section 2, and soft section 2 can carry out corresponding deformation according to the state of pjncture needle when the pjncture needle withdraws from to the needle point can not produce shearing or fish tail to it. And compared with the soft segment 2 with the length of 3cm-7cm in the conventional design, the total length ratio of the straight segment 6 and the variable diameter segment 5 is small, and the softness of the head end of the interventional guide wire is not influenced.

The technical means disclosed by the scheme of the utility model is not limited to the technical means disclosed by the embodiment, and also comprises the technical scheme formed by any combination of the technical features. It should be noted that modifications and adaptations to the utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.

Claims (11)

1. An integral interventional guide wire, characterized in that: the interventional guide wire is of an integrated structure and comprises a guide wire head end, a soft section and a guide wire main body which are sequentially arranged along the axial direction of the guide wire head end, wherein the outer diameter of the guide wire head end and the outer diameter of the guide wire main body are both larger than the outer diameter of the soft section, and the end face of the guide wire head end, which is opposite to the soft section, is of an arc-shaped structure.

2. An integrated interventional guide wire as defined in claim 1, wherein: the guide wire head end is a hemispherical structure, and the protruding part of the hemispherical structure faces away from the soft section.

3. An integrated interventional guide wire as defined in claim 1, wherein: a transition section is arranged between the soft section and the guide wire main body, and the outer diameter of the transition section gradually decreases from the guide wire main body to the soft section.

4. An integrated interventional guide wire as defined in claim 1, wherein: the outer diameter of the guide wire head end is equal to the outer diameter of the guide wire main body.

5. An integrated interventional guide wire as defined in claim 4, wherein: the length of the soft section is 3cm-7cm.

6. An integrated interventional guide wire as defined in claim 4, wherein: the outer diameter of the soft segment is less than 0.2mm.

7. An integrated interventional guide wire as defined in claim 5, wherein: a reducing section is arranged between the guide wire head end and the soft section, and the outer diameter of the reducing section gradually decreases from the guide wire head end to the soft section.

8. An integrated interventional guide wire as defined in claim 7, wherein: the length of the reducing section is 1mm-2mm.

9. An integrated interventional guide wire as defined in claim 8, wherein: a straight section is arranged between the reducing section and the end of the thread guiding head.

10. An integrated interventional guide wire as defined in claim 9, wherein: the outer diameter of the straight section is equal to the outer diameter of the guide wire body.

11. An integrated interventional guide wire as defined in claim 9, wherein: the length of the straight section is less than 1.5mm.