CN209900408U - Guide wire - Google Patents

Abstract

The utility model discloses a seal wire relates to non-vascular human natural cavity way seal wire field, including dabber, spring pipe and bulb, the seal wire external diameter is from inserting the end to the tail end crescent, insert the end with the bulb is connected, the external diameter of bulb is greater than the seal wire inserts end external diameter and less than or equal to seal wire tail end external diameter, the spring pipe parcel is in the dabber is peripheral, the spring pipe coats and is stamped the package and moulds the layer. The utility model overcomes metal seal wire is poor with cavity inner wall affinity among the prior art, and frictional resistance is big, and the lubricity is low etc. is not enough, has that the package is moulded the layer and is come off or curl that advantages such as visual strong, simple structure, can not stabbing cavity inner wall under scope and X-ray simultaneously.

Description

Guide wire

Technical Field

The utility model relates to a human natural chamber of non-blood vessel says the seal wire field, especially relates to a seal wire.

Background

When a catheter is inserted into a living body lumen such as a nonvascular human digestive tract, urinary tract, or airway, a guide wire may be used to guide the catheter to a target site of the living body lumen. The role of guidewires in medical procedures is generally to assist in the advancement and proper positioning of catheters and other medical devices within a lumen, non-blood vessel, or other body cavity. In addition, in the case of a biological lumen or the like to be observed or treated using an endoscope, the catheter inserted into the lumen of the endoscope is also guided to a target site such as a biological lumen using a guide wire. When inserting a catheter into a lumen, a guide wire is used, and first the guide wire is inserted into the lumen, and then the catheter is advanced along the guide wire so that the guide wire can guide the catheter to a lesion.

In the prior art, the metal guide wire has poor affinity with the inner wall of the cavity, large frictional resistance, low lubricity and inconvenience for insertion. And when the guide wire is in a running state in the body of the patient, a doctor needs to observe the running state of the guide wire through a medical X-ray machine or an endoscope. Doctors can judge the contact condition of the guide wire and the inner wall of the cavity by observing images, but the common guide wire is not beneficial to observation under an endoscope and an X-ray machine. For the doctor, the accurate contact condition of judging seal wire and cavity inner wall is very important, and the seal wire exerts too big force and probably stabbed the cavity inner wall to human tissue, and this kind of injury can be avoided to the accurate contact condition of judging seal wire and cavity inner wall. Under the condition that the endoscope can be used for observation, the inner wall of a cavity is prevented from being punctured as much as possible in order to facilitate observation of the movement of the guide wire under direct vision of the endoscope, and the guide wire is required to be provided with an identifiable mark. The guide wire identification is designed slightly differently by companies, but is based on the standard that a doctor can easily observe the movement of the guide wire. At present, spiral stripes are mainly used and are called as zebra guide wires.

The utility model provides a visual strong, simple structure, can not stab the cavity inner wall, can also avoid the package to mould the layer and drop or the problem that curly seal wire becomes this medical field and wait to solve promptly.

Therefore, those skilled in the art have been devoted to develop a guidewire which has high visibility under endoscope and X-ray, is simple in structure, does not stab the inner wall of the lumen, and can prevent the plastic-coated layer from falling off or curling.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned defect of prior art, the technical problem to be solved in the utility model is to provide a visual strong, simple structure, can not stab the cavity inner wall under scope and X-ray, can avoid the package to mould the layer simultaneously and drop or the seal wire that curls.

In order to realize the above-mentioned purpose, the utility model provides a seal wire, a serial communication port, the structure includes that dabber, intermediate level and package mould the layer, the seal wire external diameter is from inserting the end to the tail end crescent, the intermediate level parcel is in the dabber is peripheral, the intermediate level coats and is stamped the layer is moulded to the package, the dabber with the package is moulded the layer and is followed the seal wire inserts the end and runs through to the seal wire tail end.

Furthermore, the middle layer is distributed at the insertion end of the mandrel, or the middle section or the tail end of the mandrel or penetrates from the insertion end of the guide wire to the tail end of the guide wire, and the middle layer is in a hollow spring tube form.

Further, the mandrel and the middle layer are made of metal materials.

Furthermore, the plastic-coated layer is made of a high molecular polymer material, and the high molecular polymer material is polytetrafluoroethylene or polyurethane or a nylon elastomer.

Further, the layer is moulded to the package includes that first package moulds the portion and the second moulds the portion, first package moulds the part and is located the insertion end of seal wire, second package mould the portion distribute in the rest parts of seal wire, the material hardness of first package mould the portion is less than the second package moulds the portion.

Further, the metal material is nickel-titanium alloy and stainless steel material.

Furthermore, a ball head is arranged at the insertion end of the mandrel and is connected to the mandrel in a seamless mode.

Further, the plastic-coated layer is covered with a super-smooth hydrophilic coating.

Further, the guide wire is a straight guide wire.

Further, the guide wire is an elbow guide wire.

The beneficial effects of the utility model reside in that: after a layer of spring tube is added on the surface of the guide wire, the defect that the guide wire in the prior art is poor in flexibility in the use process is overcome. On the other hand, the spring tube is made of metal material, the developing performance under an X-ray machine can be obviously observed under the X-ray machine and the endoscope, a doctor can clearly observe the puncture part reached by the front end of the guide wire, and the effect of preventing the guide wire head from puncturing the inner wall of the cavity can be realized under the condition of not needing a positioning device.

The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings, so as to fully understand the objects, the features and the effects of the present invention.

Drawings

Fig. 1 is a schematic structural view of a guide wire according to a preferred embodiment of the present invention;

fig. 2 is a schematic view of the elbow guide wire structure according to a preferred embodiment of the present invention.

Detailed Description

The technical contents of the preferred embodiments of the present invention will be more clearly understood and appreciated by referring to the drawings attached to the specification. The present invention may be embodied in many different forms of embodiments, and the scope of the invention is not limited to the embodiments described herein.

In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. The thickness of the components may be exaggerated where appropriate in the figures to improve clarity.

As shown in figure 1, the structure of the guide wire of a preferred embodiment of the present invention is schematically illustrated, the catheter is composed of a mandrel 1, a ball head 2 and a spring tube 3, the mandrel 1 is connected with the ball head 2, the end is an insertion end, the other end is a tail end, the outer diameter of the guide wire is gradually increased from the insertion end to the tail end, the ball head 2 is connected with the mandrel 1 in a seamless welding manner, the outer diameter of the ball head 2 is between the outer diameter of the insertion end and the tail end, so as to ensure that the guide wire can smoothly enter when being inserted into a biological body lumen, the spring tube 3 is tightly wrapped on the surface of the, because the spring tube 3 is made of metal material, the development of the guide wire is enhanced, the dynamic state of the guide wire can be observed conveniently under an X-ray machine and an endoscope, the guide wire head is prevented from puncturing the inner wall of the cavity, particularly, when the nickel-titanium alloy and the stainless steel material are selected, the developing property is enhanced more obviously, and the observation effect is better. The peripheral cladding of spring pipe 3 has the package to mould layer 4, and the package is moulded layer 4 and is adopted materials preparation such as polytetrafluoroethylene or polyurethane, nylon elastomer, for reaching better effect, the package is moulded the layer and is moulded portion and second package including first package and mould portion, and the first package is moulded the distance that portion to the bulb and is less than the second package and is moulded the distance that portion to the bulb, and the hardness of first package portion of moulding is less than the second package and is moulded portion. In order to enhance the hydrophilicity of the guide wire, a super-smooth hydrophilic coating can be coated on the plastic coating layer.

In order to meet the requirements of different working objects, the guide wire insertion end can be set into a straight head structure and an elbow structure, wherein fig. 1 is a schematic diagram of the straight head guide wire structure, and fig. 2 is a schematic diagram of the elbow guide wire structure.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the teachings of this invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims (10)

1. The utility model provides a seal wire, its characterized in that, the structure includes that dabber, intermediate level and package mould the layer, the seal wire external diameter is from inserting the end to the tail end crescent, the intermediate level parcel is in the dabber is peripheral, the intermediate level coats outward and is stamped the layer is moulded to the package, the dabber with the package is moulded the layer and is followed the seal wire inserts the end and runs through extremely the seal wire tail end.

2. The guidewire of claim 1, wherein the intermediate layer is disposed at the insertion end of the mandrel, or at the mid-section or at the trailing end or throughout the guidewire from the insertion end to the trailing end, the intermediate layer being provided in the form of a hollow spring tube.

3. The guidewire of claim 1, wherein the mandrel and the intermediate layer are made of a metallic material.

4. The guidewire of claim 1, wherein the over-mold layer is comprised of a high molecular polymer material that is polytetrafluoroethylene or polyurethane or a nylon elastomer.

5. The guidewire of claim 1, wherein the over-molded layer comprises a first over-molded portion and a second over-molded portion, the first over-molded portion is located at the insertion end of the guidewire, the second over-molded portion is distributed on the rest of the guidewire, and the material hardness of the first over-molded portion is less than that of the second over-molded portion.

6. The guidewire of claim 3, wherein the metallic material is nitinol and stainless steel.

7. The guidewire of claim 1, wherein the mandrel insertion end is provided with a bulbous head that is seamlessly connected to the mandrel.

8. The guidewire of claim 1, wherein the plastic-coated outer circumference is covered with a super-lubricious hydrophilic coating.

9. The guidewire of claim 1, wherein the guidewire is a straight-headed guidewire.

10. The guidewire of claim 1, wherein the guidewire is an elbow guidewire.

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