Supporting guide wire capable of measuring distance

Abstract

The utility model relates to the technical field of medical instruments, in particular to a distance-measuring supporting guide wire, which comprises an inner core and a mandrel coaxially sleeved outside the inner core, one outer end of the mandrel is connected with a sheath, a developing spring is arranged inside the sheath, a plurality of developing rings are distributed on the outer side of the sheath at intervals, and the developing rings are connected with the mandrel. The developing rings are arranged at the front end of the guide wire at standard intervals, the developing marking function can be achieved, the original supporting and access establishing capacity of the guide wire can be kept, the developing rings are arranged every 3-5 mm, the size of aneurysm and the like can be calculated according to the corresponding number of the developing rings, the overall structural design is simple, and the development marking effect is good. And the accuracy and the applicability of the surgical operation are greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field especially, relates to a kind of distance-measurable support guide wire. BACKGROUND

[0002] Vascular intervention technology is a minimally invasive treatment method, through femoral artery or radial artery puncture, using intravascular catheter to deliver treatment instrument to vascular lesion site, to realize vascular recanalization, with the characteristics of small intraoperative risk and fast postoperative recovery. Guide wire product is the key instrument of vascular intervention surgery, used to establish access and support other instruments such as balloon or balloon-expandable stent to expand in lesion vascular position.

[0003] The existing guide wire structure includes a spring at the head end and an inner core, the inner core is made of strong support material such as stainless steel at the proximal end, and is made of nickel-titanium alloy super-elastic material at the distal end, and the spring is coated with a hydrophilic coating or wrapped with a polymer material to reduce frictional resistance, as shown in the accompanying drawings. Figure 1

[0004] However, the existing interventional instrument has limitations in aneurysm surgery, and the operator may have difficulty accurately observing the size of the patient due to the angle of the imaging device, resulting in misjudgment of the size of the aneurysm, affecting the surgical results. SUMMARY

[0005] The utility model aims at solving the size of the patient cannot be accurately observed in the prior art and other shortcomings, and provides a distance-measurable support guide wire.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A distance-measurable support guide wire is designed, which includes an inner core and a mandrel coaxially sleeved outside the inner core, one end of the mandrel is connected with a sheath, the inside of the sheath is provided with a developing spring, and the outside of the sheath is spaced apart and provided with a plurality of developing rings.

[0008] Further, the inner core includes a first core body and a second core body connected thereto.

[0009] Further, the second core body includes a first constant diameter portion connected to the first core body, the side of the first constant diameter portion is sequentially provided with a first variable diameter portion, a second constant diameter portion and a second variable diameter portion, one side of the second variable diameter portion is provided with a head end connected to the sheath.

[0010] Further, the sheath is a polymer sheath, and the plurality of developing rings are equidistantly distributed on the outside of the sheath.

[0011] Further, the distance between the adjacent two developing rings is 3-5mm.

[0012] ​Further, the core shaft includes a distal core shaft and a nickel titanium core shaft, and the joint of the distal core shaft and the nickel titanium core shaft is opposite to the joint of the first core body and the second core body.

[0013] Further, the outer side of the sheath is coated with a hydrophilic coating.

[0014] The utility model discloses a kind of distance-measurable support guide wires, beneficial effect lies in: in the utility model, by setting standard interval developing ring in guide wire front end, both can play the role of developing mark, and the ability of maintaining original support and establishing passage of guide wire, developing ring is set every 3-5mm, so according to the number corresponding to developing ring, the size of aneurysm etc. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of prior art;

[0016] Figure 2 It is a structural schematic diagram of the utility model;

[0017] Figure 3 It is a state diagram when the utility model is used.

[0018] In the drawing: 1, inner core;11, first core body;12, second core body;121, first constant diameter portion;122, first variable diameter portion;123, second constant diameter portion;124, second variable diameter portion;125, head end;2, core shaft;21, distal core shaft;22, nickel titanium core shaft;3, sheath;4, developing spring;41, developing ring;5, patient;6, blood vessel. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0020] Referring to Figure 2 It is one embodiment of the utility model, and discloses a kind of distance-measurable support guide wires, which is used to measure the size of patient position under the premise of meeting support ability, specifically the distance-measurable support guide wire includes inner core 1 and coaxial sheath in the outer core 1 of core shaft 2, the outer end of the core shaft 2 is connected with sheath 3, the inside of the sheath 3 is provided with developing spring 4, preferably the material of the developing spring 4 in the embodiment is tungsten alloy, tungsten alloy has good developing property after entering human body, can effectively enhance the developing ability of guide wire, and the outer side of sheath 3 is spaced apart with multiple developing rings 41.

[0021] In some embodiments, the inner core 1 in the utility model includes first core body 11 and the second core body 12 connected, and specifically, the first core body 11 can be selected from conventional stainless steel, and the second core body 12 can be selected from nickel-titanium alloy; the combination of the first core body 11 and the second core body 12 can simultaneously satisfy the hardness of stainless steel and the flexibility of nickel-titanium alloy, thereby enhancing the elasticity and recoverability of the guide wire.

[0022] On the basis of the above-mentioned embodiments, the second core body 12 in the utility model includes a first constant diameter portion 121 connected with the first core body 11, the side of the first constant diameter portion 121 is sequentially provided with a first variable diameter portion 122, a second constant diameter portion 123 and a second variable diameter portion 124, one side of the second variable diameter portion 124 is provided with a head end 125 connected with the sheath 3, wherein the outer diameter of the first variable diameter portion 122 sequentially decreases along the first constant diameter portion 121 towards the second constant diameter portion 123, and the outer diameter of the second variable diameter portion 124 sequentially decreases along the second constant diameter portion 123 towards the head end 125.

[0023] Specifically, the variable diameter structure is adopted in the embodiment to realize that the middle to distal end portion of the guide wire has better flexibility relative to the proximal end portion, wherein the distal end is the end towards the sheath 3, and the proximal end is the end towards the first core body 11, and the guide wire also has better pushing performance at the proximal end.

[0024] On the basis of the above-mentioned embodiments, the sheath 3 in the embodiment is a polymer sheath, and a plurality of developing rings 41 are equidistantly distributed on the outside of the sheath 3; specifically, the polymer sheath in the embodiment is a prior art, and specifically, reference can be made to the polymer sheath for a guide wire disclosed in Chinese Patent Publication No. CN101107037A, and the tungsten powder or barium sulfate coated on the outside of the sheath 3 can be used as a developing agent to achieve the developing effect.

[0025] In a preferred embodiment, the distance between two adjacent developing rings 41 is 3-5 mm.

[0026] In addition, the mandrel 2 in the embodiment includes a distal end mandrel 21 and a nickel-titanium mandrel 22, and the joint of the distal end mandrel 21 and the nickel-titanium mandrel 22 is opposite to the joint of the first core body 11 and the second core body 12; specifically, the distal end mandrel 21 in the embodiment can also be made of stainless steel, and the structure of stainless steel combined with nickel-titanium alloy can realize the hardness of stainless steel and the flexibility of nickel-titanium alloy, thereby enhancing the elasticity and recoverability of the guide wire.

[0027] Of course, the person skilled in the art knows that in order to reduce the advancing friction of the present guide wire, a hydrophilic coating is applied on the outside of the sheath 3.

[0028] As shown in Figure 3 the operation, after the guide wire is normally delivered to the lesion position along the blood vessel 6, the specific position of the guide wire head end can be clearly seen by the developing spring 4, at this time, the guide wire is dragged to the patient 5 position, and the positioning is performed according to the developing spring 4 in the guide wire head end, the size of the aneurysm is calculated according to the number of the developing rings 41 on the guide wire, and thus the corresponding instrument is selected by the operator, for example, the developing ring 41 is arranged every 3 mm, and then the size of the aneurysm can be calculated according to the actual number seen in the image.

[0029] In summary, in the present utility model, the developing ring 41 with standard interval is arranged at the front end of the guide wire, which can play the role of developing mark and maintain the original supporting and path establishing ability of the guide wire, the developing ring 41 is arranged every 3-5 mm, and thus the size of the aneurysm can be calculated according to the corresponding number of the developing ring 41, the overall structure design is simple, and the accuracy and applicability of the operation are greatly improved.

[0030] The above is only the preferred specific implementation mode of the present utility model, but the protection scope of the present utility model is not limited to this, any person skilled in the art in the technical range disclosed by the present utility model can make equivalent replacement or change according to the technical scheme and the utility model concept of the present utility model, which should be covered in the protection scope of the present utility model.

Claims

1. A rangeable support guidewire, comprising: The inner core (1) and the mandrel (2) coaxially sleeved outside the inner core (1), the outer end of the mandrel (2) is connected with the sheath (3), the inside of the sheath (3) is provided with the developing spring (4), and the outside of the sheath (3) is spacedly provided with a plurality of developing rings (41).

2. The distance-measurable support guide wire according to claim 1, characterized in that: The inner core (1) comprises a first core body (11) and a second core body (12) connected with the first core body (11).

3. The rangeable support guidewire of claim 2, wherein: The second core body (12) comprises a first constant diameter portion (121) connected with the first core body (11), the side of the first constant diameter portion (121) is sequentially provided with a first variable diameter portion (122), a second constant diameter portion (123) and a second variable diameter portion (124), one side of the second variable diameter portion (124) is provided with a head end (125) connected with the sheath (3).

4. The distance-measurable support guide wire according to claim 1, characterized in that: The sheath (3) is a polymer sheath, and a plurality of developing rings (41) are equidistantly distributed on the outside of the sheath (3).

5. The rangeable support guidewire of claim 4, wherein: The distance between two adjacent developing rings (41) is 3-5mm.

6. The rangeable support guidewire of claim 2, wherein: The mandrel (2) comprises a distal end mandrel (21) and a nickel-titanium mandrel (22), and the junction of the distal end mandrel (21) and the nickel-titanium mandrel (22) is opposite to the junction of the first core body (11) and the second core body (12).

7. The rangeable support guidewire of any of claims 1-6, wherein: The outside of the sheath (3) is coated with a hydrophilic coating.

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