Medical guide wire

Abstract

The utility model belongs to the technical field of medical instruments, and particularly relates to a guide wire. A medical guide wire comprises a guide wire body, the guide wire body comprises a metal wire extending in the length direction of the guide wire and a first wrapping layer wrapping the metal wire, a soft head portion is arranged at the front end of the guide wire body and comprises a second wrapping layer made of soft materials, and the second wrapping layer is made of soft materials. The second coating layer sequentially comprises a bent section and a linear section in the length direction, the linear section is located between the bent section and the guide wire body, an extending wire extending in the length direction of the linear section is embedded in the linear section, and the bent section is of a solid structure. The guide wire has the advantage of reducing pain when the guide wire is inserted into the body of a patient.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and in particular relates to a medical guide wire. Background Art

[0002] Due to the continuous progress of interventional medicine, during the endoscopic diagnosis and treatment of the urinary tract and digestive tract, the guide wire plays an important role in guiding and introducing the ureter, renal pelvis or bile duct.

[0003] A Chinese patent with application number 202020418346.4 discloses a non-vascular cavity guidewire: comprising: a guidewire body, a plastic coating, a soft head, a coating, a handle, and a lubrication box; the guidewire body is made of nickel-titanium alloy material, and the outer diameter of the guidewire body at the head end 150mm gradually decreases, and the outer diameter of the rear end part after 150mm remains consistent; the surface of the rear end part of the guidewire body is coated with a plastic coating layer, and the plastic coating layer material is medical PU plastic, and the plastic coating PU plastic is bendable; there is a coating on the plastic coating layer, and the coating coating material is a super-smooth hydrophilic material polyurethane acrylate; the head end of the guidewire body 150mm is completely coated with polyurethane acrylate to form a soft head, and the structure is that the outer diameter gradually decreases and the tip is arc-shaped; the coating polyurethane acrylate on the plastic coating layer and the polyurethane acrylate coated on the head end are integrally formed.

[0004] In the above solution, the guide wire body extends into the soft head, which will make the soft head harder and increase the pain of the patient when inserted into the patient's body. Utility Model Content

[0005] The utility model aims to provide a medical guide wire which can reduce the pain when the guide wire is inserted into a patient's body.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a medical guide wire, comprising a guide wire body, the guide wire body comprising a metal wire extending along the length direction of the guide wire and a first coating layer coated on the outside of the metal wire, a soft head is provided at the front end of the guide wire body, the soft head comprises a second coating layer made of soft material, the second coating layer comprises a curved segment and a straight segment in sequence along the length direction, the straight segment is located between the curved segment and the guide wire body, an extension wire extending along the length direction of the straight segment is embedded in the straight segment, and the curved segment is a solid structure.

[0007] By arranging the extension wire in the straight section, the curved section does not have the extension wire, so that the curved section of the soft head is softer, so that when the guide wire is inserted into the patient, the patient's pain can be reduced. The metal wire and the extension wire can be made of nickel-titanium alloy or 304 stainless steel. The curved section and the straight section are made of the same soft material and are arranged in one piece; the curved section is a solid structure.

[0008] Preferably, the length of the extension wire accounts for 60%-70% of the length of the soft head.

[0009] By extending the length of the wire to 60% - 70% of the length of the soft head, the soft head will not be too hard to hurt the patient, or too soft and inelastic.

[0010] Preferably, the metal wire and the extension wire are nickel-titanium alloy wires, which are shape memory alloys and can facilitate the recovery of the deformation of the soft head.

[0011] Preferably, the metal wire and the extension wire are connected and fixed.

[0012] The two can be fixed by welding, which makes assembly more convenient.

[0013] Preferably, the metal wire and the extension wire are coaxially arranged.

[0014] Ensure the contact area between the metal wire and the extension wire to ensure the connection strength between the two.

[0015] Preferably, the Shore hardness of the soft head is 40A-50A, which further reduces the pain of the guide wire when it is inserted into the patient's body, while ensuring the hardness requirement.

[0016] Preferably, the bending angle of the bending section is 20°-90°, which satisfies most of the complex structures of the human body and facilitates the insertion of the guide wire. The bending angle refers to the angle between the front end of the bending section and the straight direction of the guide wire.

[0017] Preferably, the soft material is polyurethane or PEBAX (polyether block polyamide).

[0018] Polyurethane or PEBAX materials are softer in texture and can reduce pain for patients.

[0019] Preferably, the material of the first coating layer is PTFE (polytetrafluoroethylene) or polyurethane or PEBAX (polyether block polyamide).

[0020] PTFE material has good lubricity, reduces friction, and reduces damage when the guide wire passes through the human body. Polyurethane or PEBAX can also be used, and polyurethane or PEBAX materials also have good toughness and lubricity.

[0021] Preferably, the outer wall of the first coating layer is provided with a mark, the mark includes a first mark and a second mark, and the first mark and the second mark form a blue and white zebra stripe, which is convenient for endoscopic observation of the position of the guide wire. The zebra stripe is a stripe that can be used for endoscopic observation on any existing guide wire.

[0022] The utility model has the following advantages: by arranging the extension wire in the straight section, the curved section does not have a metal wire, so that the curved section of the soft head is softer, thereby reducing the patient's pain when the guide wire is inserted into the patient, and the proportion of the buried nickel-titanium alloy wire can ensure that the head of the soft head of the guide wire is softer and the overall hardness of the guide wire can be guaranteed, which can reduce the patient's pain when the guide wire is inserted into the patient, and can also help the doctor control the advancement and rotation angle of the soft head of the guide wire; the specific 20°-90° angle of the curved section can facilitate passing through the complex structure of the human body. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the utility model.

[0024] Figure 2 for Figure 1 sectional view of .

[0025] Figure 3 This is an enlarged view of the curved section.

[0026] Reference numerals: soft head 1 , curved segment 11 , straight segment 12 , extension wire 2 , guide wire body 3 , first identification 31 , second identification 32 , second coating layer 4 , metal wire 5 , first coating layer 6 . DETAILED DESCRIPTION

[0027] The utility model is further described below based on the accompanying drawings and specific embodiments.

[0028] Example 1

[0029] like Figures 1 to 3 As shown, this embodiment discloses a medical guide wire, including a guide wire body 3, the guide wire body 3 includes a metal wire 5 extending along the length direction of the guide wire and a first coating layer 6 coated on the outside of the metal wire 5, a soft head 1 is provided at the front end of the guide wire body 3, the soft head 1 includes a curved section 11 and a straight section 12, the curved section 11 is located at the front end of the soft head 1, and the straight section 12 is located between the curved section 11 and the guide wire body 3, the front end of the metal wire 5 has an extension wire 2, the straight section 12 is composed of the extension wire 2 and the second coating layer 4 coated on the extension wire 2, the curved section 11 is a solid structure and is formed into an integral structure with the second coating layer 4 by the same soft material. The metal wire 4 and the extension wire 2 are connected to each other by welding and are coaxially arranged. The length of the extension wire 2 accounts for 70% of the length of the soft head 1. The Shore hardness of the soft head 1 is 45A. The bending angle of the curved section 11 is the angle α between the front end of the curved section 11 offset from the straight direction of the guide wire, and α is 45°. The soft materials of the curved section 11 and the second coating layer 4 are polyurethane materials, and the material of the first coating layer 6 is PTFE. The outer wall of the first coating layer 6 of the guide wire body 3 is provided with a mark, which includes a first mark 31 and a second mark 32, and the first mark and the second mark form a blue and white zebra stripe.

[0030] Example 2

[0031] The difference between the second embodiment and the first embodiment is that the metal wire and the extended wire are integrally formed.

Claims

1. A medical guide wire, comprising a guide wire body, wherein the guide wire body comprises a metal wire extending along the length direction of the guide wire and a first coating layer coated on the outside of the metal wire, characterized in that: A soft head is provided at the front end of the guide wire body, and the soft head includes a second coating layer made of soft material. The second coating layer includes a curved segment and a straight segment in sequence along the length direction. The straight segment is located between the curved segment and the guide wire body. An extension wire extending along the length direction of the straight segment is buried in the straight segment, and the curved segment is a solid structure.

2. The medical guide wire according to claim 1, characterized in that: The length of the extension wire accounts for 60%-70% of the length of the soft head.

3. The medical guide wire according to claim 1, characterized in that: The metal wire and the extension wire are nickel-titanium alloy wires.

4. The medical guide wire according to claim 1, characterized in that: The metal wire and the extension wire are connected and fixed.

5. The medical guide wire according to claim 4, characterized in that: The metal wire and the extension wire are coaxially arranged.

6. The medical guide wire according to claim 1, characterized in that: The Shore hardness of the soft head is 40A-50A.

7. The medical guide wire according to claim 1, characterized in that: The bending angle of the bending section is 20°-90°.

8. The medical guide wire according to any one of claims 1 to 7, characterized in that: The soft material is polyurethane or polyether block polyamide.

9. The medical guide wire according to any one of claims 1 to 7, characterized in that: The material of the first coating layer is polytetrafluoroethylene, polyurethane or polyether block polyamide.

10. The medical guide wire according to claim 1, characterized in that: The outer wall of the first covering layer is provided with a logo, wherein the logo includes a first logo and a second logo, and the first logo and the second logo form a blue and white zebra stripe.

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