CN110237402B

CN110237402B - Guide wire capable of forming loop

Info

Publication number: CN110237402B
Application number: CN201910429042.XA
Authority: CN
Inventors: 郝迎学; 钟华
Original assignee: First Affiliated Hospital of Army Medical University
Current assignee: First Affiliated Hospital of Army Medical University
Priority date: 2019-05-22
Filing date: 2019-05-22
Publication date: 2021-10-08
Anticipated expiration: 2039-05-22
Also published as: CN110237402A

Abstract

The invention discloses a guide wire capable of forming a loop, which comprises a guide wire, wherein the guide wire comprises an outer layer and an inner layer, the guide wire is provided with a head end and a tail end, the outer layer of the guide wire is a steel wire coil, the steel wire coil is formed by uniformly and orderly winding steel wires, the steel wires have elasticity, the inner layer of the guide wire is a steel wire core, the steel wire core is elastic, the steel wire coil is sleeved outside the steel wire core, the steel wire core becomes thinner gradually towards the head end, the steel wire coil becomes thinner gradually towards the head end, and the head end of the steel wire core is welded with the head end of the steel wire coil. The cotton thread is arranged in the steel wire coil, an opening is formed in the part, close to the head end, of the steel wire coil, and the cotton thread extends out of the through hole and is connected with the head end of the guide wire. Use above-mentioned seal wire that can become tong "pan", can pack up comparatively sharp-pointed head end, make the front end comparatively slick and sly, be difficult for puncturing the vascular wall, guarantee patient's safety to easy operation, the practicality is high.

Description

Guide wire capable of forming loop

Technical Field

The invention relates to the field of medical instruments, in particular to a guide wire capable of being looped.

Background

Interventional radiology, also called interventional therapeutics, is an emerging discipline combining image diagnosis and clinical treatment, which has been rapidly developed in recent years. Under the guidance and monitoring of digital subtraction angiography machine, CT, ultrasonic and magnetic resonance imaging equipment, puncture needle, catheter and other interventional devices are used to introduce specific instrument into the pathological change part of human body via natural pore canal or small wound for minimally invasive treatment. It is the clinical three-column discipline which is parallel to the traditional internal medicine and surgery.

Interventional therapy is a wide variety of techniques, and can be divided into vascular and non-vascular interventional techniques. Vascular interventional procedures include percutaneous transluminal angioplasty and stenting of blood vessels for the treatment of stenosis and occlusion, thrombolytic therapy for the treatment of arteriovenous thrombosis, control of bleeding (acute and chronic trauma, postpartum, inflammation, varicose veins, etc.), vascular malformations, and embolization treatment of arteriovenous fistulas and hemangiomas, inferior vena cava filters for the prevention of pulmonary embolism, transjugular intrahepatic portosystemic shunt (TIPSS) techniques for the treatment of portal hypertension for cirrhosis, various angiographic diagnostics, venous access diagnostics, and the like.

A Guide Wire (Guide Wire), also known as a Guide Wire or Guide Wire, is one of the main tools for percutaneous cannulation in vascular interventional procedures. The guide wire plays a role in guiding and supporting the catheter, helps the catheter to enter blood vessels and other cavities, and guides the catheter to smoothly reach a lesion. The guide wire needs to be punctured into a blood vessel, so that the front end of the guide wire is relatively sharp, and after the guide wire is inserted into the blood vessel, the tip of the guide wire is propped against the blood vessel wall to easily puncture the blood vessel, so that danger is caused to a patient.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide the guide wire capable of forming the loop, which can form the loop after being punctured into the blood vessel, so that the blood vessel wall of a patient is not easy to puncture, and the safety of the patient is ensured.

In order to achieve the purpose, the invention is realized by the following technical scheme: a guide wire capable of being formed into a loop comprises a guide wire, wherein the guide wire comprises an outer layer and an inner layer, the guide wire is provided with a head end and a tail end, the outer layer of the guide wire is a steel wire coil, the steel wire coil is formed by uniformly and neatly winding steel wires, the steel wires have elasticity, the inner layer of the guide wire is a steel wire core, the steel wire core has elasticity, the steel wire coil is sleeved outside the steel wire core, the steel wire core becomes thinner gradually towards the head end, the steel wire coil becomes thinner gradually towards the head end, and the head end of the steel wire core is welded with the head end of the steel wire coil;

the cotton thread is arranged in the steel wire coil, an opening is formed in the part, close to the head end, of the steel wire coil, and the cotton thread extends out of the through hole and is connected with the head end of the guide wire.

The seal wire is rolled up by the steel wire and is constituteed with the steel wire core, and the steel wire core is hard and straight, and the head end department steel wire core of seal wire is rolled up the welding with the steel wire and is fused as an organic whole to the tapering makes the head end comparatively sharp-pointed, inserts the blood vessel with the seal wire in, dredges the position of vascular jam, inserts the back as the seal wire, and the cotton thread of pulling is crooked the head end of seal wire to the direction of keeping away from the head end, makes sharp-pointed head end towards the seal wire, and the position of bending into the tong "pan" is towards seal wire direction of motion.

The guide wire capable of being looped has the advantages that: the seal wire is after the puncture gets into the blood vessel, packs up comparatively sharp-pointed head end, and becomes a tong "pan" part with comparatively level and smooth forward, can not puncture the vascular wall, guarantees patient's safety.

Further, a tip end of the guide wire is insertable into the opening.

The sharp head end of the guide wire is inserted into the opening by pulling the cotton thread, so that the blood vessel wall is prevented from being punctured.

Furthermore, two raised conical blocks are arranged on the side wall of the opening, the tips of the two conical blocks face the cavity, a spacing groove is formed between the two conical blocks, a convex block is arranged at the head end of the guide wire, and the convex block is matched with the spacing groove.

When the guide wire is pulled to enter the opening, the convex block slides into the spacing groove, the guide wire can be reset by the aid of the elastic force after the cotton threads are loosened, and the convex block is clamped in the spacing groove under the action of the elastic force of the guide wire, so that the guide wire continues to stay in the opening. The cotton thread is pulled again, the convex block slides out from the spacing groove, and the guide wire can be separated from the opening to reset and straighten.

Further, the guide wire winding device further comprises a rotating disc, a groove is formed in the rotating disc in the circumferential direction, the tail end of the guide wire is fixedly arranged in the groove, and the guide wire can be wound in the groove.

Since the wire coil is elastic, the wire coil can be stored in the rotating disk, and the guide wire can be retracted by rotating the rotating disk.

Furthermore, a cavity is formed in the rotating disc, the guide wire is communicated with the cavity, a through hole is formed in the center of the rotating disc, and the cotton thread penetrates through the cavity and extends out of the through hole.

The cotton thread penetrates into the cavity of the rotating disc from the inside of the guide wire and then penetrates out of the through hole, and the head end of the guide wire can be bent by pulling the cotton thread.

Furthermore, a rotating shaft is arranged on the rotating disc and can rotate relative to the rotating disc, the other end of the cotton thread is fixedly connected with the rotating shaft, and the cotton thread can be wound on the rotating shaft.

When the wire is contracted by the rotating disc, the cotton thread is wound on the rotating shaft, and the rotating shaft is rotated, so that the cotton thread can be contracted together.

Further, the surface of the steel wire coil is provided with a polytetrafluoroethylene film.

The polytetrafluoroethylene film can make the seal wire more smooth, reduces frictional force, after heparin treatment, can also have the function of preventing the blood coagulation.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of a rotary disk according to the present invention;

FIG. 3 is a schematic structural view of a wire coil and wire core of the present invention;

FIG. 4 is a schematic front view of the tip end of the guidewire of the present invention;

FIG. 5 is a schematic view of the back of the tip of the guidewire of the present invention;

FIG. 6 is a schematic structural diagram of a bump and a taper block according to the present invention;

FIG. 7 is a schematic structural view of a bump, a cone and a spacer groove of the present invention;

reference numerals: 100-guide wire, 110-steel wire coil, 120-steel wire core, 130-head end, 200-cotton wire, 210-opening, 211-conical block, 212-spacing groove, 220-lug, 300-rotating disk, 310-through hole and 320 rotating shaft.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby. In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", and the like, which indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are used only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referenced components or structures must have a specific orientation, be constructed in a specific orientation, and be operated, and thus are not to be construed as limiting the present invention.

Referring to fig. 1-7, the present invention provides a guidewire 100 capable of being looped, as shown in fig. 3, the guidewire 100 includes an outer layer and an inner layer, the outer layer is a steel wire coil 110 formed by uniformly and neatly winding steel wires, the steel wires have certain elasticity, and a hollow space is provided inside the steel wire coil 110. The inner layer of the guidewire 100 is a steel wire core 120, the steel wire core 120 is disposed in the cavity of the steel wire coil 110, and the steel wire core 120 is hard and straight and also has certain elasticity. The guide wire 100 has a head end 130 and a tail end at two ends, the head end 130 of the steel wire core 120 tapers towards the head end, the head end 130 of the steel wire coil 110 tapers towards the head end, and the head end 130 of the steel wire core 120 and the head end 130 of the steel wire coil 110 are finally merged and welded together.

As shown in fig. 4, a cotton thread 200 is further disposed in the cavity of the wire coil 110, an opening 210 is disposed on a portion of the guide wire 100 near the head end 130, one end of the cotton thread 200 penetrates out of the guide wire 100 from the opening 210 and is connected to the head end 130 of the guide wire 100, and pulling the cotton thread 200 can bend the head end 130 of the guide wire 100 leftward, so that the rightmost side of the guide wire 100 forms a loop and a smooth portion is supported at the frontmost end of the guide wire 100 in the moving direction, thereby preventing blood vessel puncture. Specifically, the surface of the steel wire coil 110 has a teflon film, so that the surface of the steel wire coil 110 is smoother, and the friction coefficient is reduced.

The tip 130 of the guide wire 100 can be inserted into the opening 210, and after the cotton thread 200 is pulled, the tip 130 can be pulled into the opening 210, thereby preventing the sharp part from puncturing the blood vessel. Specifically, as shown in fig. 5 to 7, two convex conical blocks 211 are disposed on the side wall of the opening 210, the two conical blocks 211 are disposed next to each other, and a spacing groove 212 is disposed between the two conical blocks 211. The head end 130 of the guide wire 100 is provided with a projection 220, and the projection 220 is matched with the spacing groove 212 and can be inserted into the spacing groove 212. After the cotton thread 200 pulls the head end 130 into the opening 210, the sharp part of the projection 220 slides over the taper block 211 and falls into the spacing groove 212, then the cotton thread 200 is loosened, the head end 130 moves towards the direction of separating from the opening 210 under the action of elasticity, but the head end 130 cannot separate from the opening 210 because the projection 220 is clamped in the spacing groove 212, and the guide wire 100 is kept as a loop all the time. The cotton thread 200 is pulled again, the lug 220 slides in the spacing groove 212, then is separated from the spacing groove 212, slides to the side of the two conical blocks 211, the lug 220 is not limited, and the head end 130 leaves the opening 210 and is reset under the action of the elastic force.

As shown in fig. 1 and 2, a rotating disc 300 is provided at the tail end of the guide wire 100, a groove is provided on the curved surface of the rotating disc 300 along the circumferential direction, a cavity is provided in the rotating disc 300, the tail end of the guide wire 100 is fixed in the groove, and the inside of the guide wire 100 is communicated with the cavity, and the guide wire 100 can be wound in the groove by rotating the rotating disc 300, so that the guide wire 100 is accommodated in the rotating disc 300. The center of the rotating disc 300 is provided with a through hole 310, so that the cotton thread 200 can extend out of the through hole 310, the cotton thread 200 can be conveniently pulled, the rotating disc 300 is further provided with a rotating shaft 320, the rotating shaft 320 can rotate relative to the rotating disc 300, the other end of the cotton thread 200 is arranged on the rotating shaft 320, the rotating shaft 320 can retract the cotton thread 200 along with the guide wire 100 when the cotton thread 200 is retracted, and then the cotton thread is wound on the rotating shaft 320 to be accommodated.

The working principle of the guide wire 100 capable of being looped is as follows: after the head end 130 of the guide wire 100 is inserted into a blood vessel, the cotton thread 200 is pulled, the head end 130 of the guide wire 100 is pulled into the opening 210, the lug 220 slides into the spacing groove 212 between the conical blocks 211, the cotton thread 200 is loosened, the head end 130 is clamped in the opening 210, and one end of the guide wire 100 facing to the moving direction is kept as a loop all the time. After the cotton thread is used, the cotton thread 200 is pulled again, the sliding block slides out of the spacing groove 212, the cotton thread 200 is loosened, the head end 130 of the guide wire 100 is reset under the action of elastic force, the rotating disc 300 and the rotating shaft 320 are rotated, and the guide wire 100 and the cotton thread 200 are retracted and contained.

The guide wire 100 capable of forming the loop can be used for retracting a sharp part after entering a blood vessel, so that the blood vessel wall can not be punctured, the safety of a patient is guaranteed, the cotton wire 200 does not need to be pulled all the time, the labor is saved, the guide wire 100 is simple in structure and easy to operate, and the practicability is high.

While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A guide wire capable of forming a loop comprises a guide wire, wherein the guide wire comprises an outer layer and an inner layer, and the guide wire is provided with a head end and a tail end and is characterized in that the outer layer of the guide wire is a steel wire coil which is formed by uniformly and neatly winding steel wires, the steel wires have elasticity, the inner layer of the guide wire is a steel wire core, the steel wire core has elasticity, the steel wire coil is sleeved outside the steel wire core, the steel wire core becomes thinner gradually towards the head end, the steel wire coil becomes thinner gradually towards the head end, and the head end of the steel wire core is welded with the head end of the steel wire coil;

cotton threads are further arranged in the steel wire coil, an opening is formed in the part, close to the head end, of the steel wire coil, and the cotton threads extend out of the through hole and are connected with the head end of the guide wire;

a tip end of the guide wire is insertable into the opening;

the side wall of the opening is provided with two raised conical blocks, the tips of the two conical blocks face the cavity, a spacing groove is formed between the two conical blocks, the head end of the guide wire is provided with a convex block, and the convex block is matched with the spacing groove;

the guide wire guiding device is characterized by further comprising a rotating disc, wherein a groove is formed in the rotating disc along the circumferential direction, the tail end of the guide wire is fixedly arranged in the groove, and the guide wire can be wound in the groove;

the rotating disc is internally provided with a cavity, the guide wire is communicated with the cavity, the center of the rotating disc is provided with a through hole, and the cotton thread penetrates through the cavity and extends out of the through hole.

2. The guide wire capable of being looped according to claim 1, wherein a rotating shaft is provided on the rotating disk, the rotating shaft is capable of rotating relative to the rotating disk, the other end of the cotton thread is fixedly connected with the rotating shaft, and the cotton thread can be wound on the rotating shaft.

3. The guidewire capable of being looped according to claim 1, wherein the surface of the steel wire coil is provided with a polytetrafluoroethylene film.