Supporting guide wire

Abstract

According to the supporting guide wire, compared with a conventional guide wire, the outer diameter of a core wire is increased, the overall supporting performance of the supporting guide wire is improved, in addition, the flexibility of the far end of the supporting guide wire is improved through the inner-layer winding wire and the outer-layer winding wire, and therefore the supporting guide wire is more flexible. The far end can at least have a straight type, a bent type, a double-bent type, an extending bent type and the like, namely, the supporting guide wire can be made into the straight type, the bent type, the double-bent type or the extending bent type in advance, and a doctor can conduct adaptive selection conveniently when facing operations under different conditions.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of medical apparatus and instruments, in particular to a supporting guide wire. BACKGROUND

[0002] In recent years, with the development of intravascular intervention technology, especially the application of artificial intravascular stent, such diseases have been well controlled.

[0003] Taking aortic dissection covered stent implantation as an example, after general anesthesia, the incision femoral artery (or directly puncture and insert the large artery sheath). The guide wire is introduced, and under the guidance of the imaging equipment, it is pushed to the aorta along the femoral artery, and the covered stent is placed at the intimal rupture to block the blood flow into the false lumen, so that the blood flow passes through the real blood vessel, and the false lumen gradually forms thrombus, and the aortic dissection is cured;

[0004] At present, the vascular intervention guide wire on the market is mainly used for nerve intervention and peripheral intervention guide wire. Due to the small size, the outer diameter is only 0.014 inch or 0.018 inch, and the supporting property is insufficient, so it is difficult to meet the requirements of the intervention operation of large blood vessels such as aorta. CONTENT OF THE UTILITY MODEL

[0005] The utility model provides a kind of supporting guide wire, at least can solve the problem indicated in background art.

[0006] A kind of supporting guide wire, comprising:

[0007] The distal end of the core wire includes a plurality of step portions with decreasing outer diameters, and the adjacent two step portions are smoothly transitioned;

[0008] The outer layer winding wire is sleeved on the distal end of the core wire; and

[0009] The inner layer winding wire is sleeved on the step portion with the smallest outer diameter;

[0010] The distal end of the outer layer winding wire, the inner layer winding wire and the core wire forms an arc-shaped end portion.

[0011] Preferably, the outer diameter of the proximal end of the core wire is 0.08mm-0.1mm, and the outer diameter of the smallest step portion is 0.03mm-0.08mm.

[0012] Preferably, the distal end of the supporting guide wire is curved.

[0013] Preferably, the distal end of the supporting guide wire is double curved.

[0014] Preferably, the distal end of the supporting guide wire is extended curved.

[0015] Preferably, the outer layer winding wire and the inner layer winding wire are both spring-shaped structures wound by flat wire or round wire.

[0016] Preferably, the outer layer of the wire has a PTFE coating.

[0017] Preferably, the distal end of the core wire is welded with a developing part.

[0018] Compared with the prior art, the support guide wire of the utility model has the advantages that: compared with the conventional guide wire, the support guide wire increases the outer diameter of the core wire and improves the supportability of the whole support guide wire; in addition, the softness of the distal end of the support guide wire is improved through the inner layer of wire and the outer layer of wire, so that the distal end can have at least the styles of straight type, bending type, double bending type and extended bending type, that is, the support guide wire can be made in the form of straight type, bending type, double bending type or extended bending type in advance, which is convenient for doctors to make adaptive selection when facing different situations in surgery. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structural schematic view of the support guide wire;

[0020] Figure 2 It is a structural schematic view of the support guide wire with straight type head end;

[0021] Figure 3 It is a structural schematic view of the support guide wire with bending type head end;

[0022] Figure 4 It is a structural schematic view of the support guide wire with double bending type head end;

[0023] Figure 5 It is a structural schematic view of the support guide wire with extended bending type head end.

[0024] BRIEF DESCRIPTION OF DRAWINGS

[0025] 1-support guide wire, 2-core wire, 3-outer layer of wire, 4-inner layer of wire, 5-step part. DETAILED DESCRIPTION

[0026] One specific embodiment of the utility model will be described in detail below in combination with the drawings, but it should be understood that the protection scope of the utility model is not limited by the specific embodiment.

[0027] For example, Figures 1 to 5As shown, the utility model embodiment provides a kind of support guide wire, including core wire 2, inner layer winding wire 4 and outer layer winding wire 3, the guide wire of this embodiment compared to conventional guide wire, the outer diameter of core wire 2 is increased 0.035 inch-0.038 inch, about 0.08mm-0.1mm, to increase the support of guide wire, to make guide wire when using head end is shaped conveniently, while avoiding injury blood vessel, reduce distal end hardness, core wire 2 distal end grinding gradually thin, there are 2-8 step parts 5, until the most distal end section is straight section, outer diameter is 0.03-0.08mm, in addition, smooth transition between adjacent two step parts 5;Distal end inner layer is welded with developing part, such as platinum tungsten wire, platinum nickel wire or platinum iridium wire and so on developing material;

[0028] Outer layer winding wire 3 is set on the distal end of core wire 2, inner layer winding wire 4 is set on the step part 5 of minimum outer diameter, to further increase the softness of guide wire, outer layer winding wire 3, inner layer winding wire 4 and core wire 2 are connected by plasma welding, so that the distal end of support guide wire 1 forms an arc-shaped end, the proximal end of outer layer winding wire 3 is welded on core wire 2, and the proximal end of inner layer winding wire 4 is welded on core wire 2;

[0029] In other embodiments, the outer layer winding wire 3 is a multi-segment spring, specifically including alternating diameter-changing segments and straight segments, each straight segment also decreasing in outer diameter, and each straight segment corresponds to one of the step parts 5, and the diameter-changing segments cooperate with the transition regions between adjacent two step parts 5, so as to better fit the distal end structure of the core wire 2 decreasing in outer diameter and improve the flexibility.

[0030] The distal end refers to the right end in Figure 1 , and the proximal end refers to the left end in Figure 1 .

[0031] According to different applicable scenarios, different head end (distal end) shapes are provided, including straight type, curved type, double curved type and extended curved type (as shown in Figures 2-5 ), so that the doctor can have sufficient selectivity when facing different situations during surgery.

[0032] The outer layer winding wire 3 and the inner layer winding wire 4 are both spring-shaped structures formed by flat wire or round wire, and the outer layer winding wire 3 has a PTFE coating.

[0033] It is apparent to those skilled in the art that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit and essential characteristics of the utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the utility model is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0034] Furthermore, it should be understood that although the description is made according to the embodiments, not every embodiment contains only one independent technical solution, and the description is made in this way only for the sake of clarity, and the person skilled in the art should consider the description as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that the person skilled in the art can understand.

Claims

1. A support guide wire, characterized by, The support guide wire comprises: a core wire, the distal end of which comprises a plurality of step portions with decreasing outer diameters, and smooth transitions between adjacent step portions; an outer layer winding wire, which is sleeved on the distal end of the core wire; and an inner layer winding wire, which is sleeved on the step portion with the smallest outer diameter; the distal end of the outer layer winding wire, the inner layer winding wire and the core wire forms an arc-shaped end portion. The outer diameter of the proximal end of the core wire is 0.08-0.1 mm, and the outer diameter of the smallest step portion is 0.03-0.08 mm.

2. A support guide wire as defined in claim 1, wherein, The distal end of the support guide wire is curved.

3. A support guide wire as defined in claim 1, wherein, The distal end of the support guide wire is double curved.

4. A support guide wire as defined in claim 1, wherein, The distal end of the support guide wire is extended curved.

5. A support wire as defined in claim 1, wherein, The outer layer winding wire and the inner layer winding wire are both spring-shaped structures formed by winding flat wires or round wires.

6. A support wire as defined in claim 1, wherein, The outer layer winding wire has a PTFE coating.

7. A support wire as in claim 1, wherein, The distal end of the core wire is welded with a developing portion.

8. A support wire as in claim 1, wherein, ​

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