CN215228216U

CN215228216U - Blood vessel guide sheath group

Info

Publication number: CN215228216U
Application number: CN202120612806.1U
Authority: CN
Inventors: 李麟荪; 杨宁
Original assignee: Kossel Medtech Suzhou Co ltd
Current assignee: Kossel Medtech Suzhou Co ltd
Priority date: 2021-03-25
Filing date: 2021-03-25
Publication date: 2021-12-21
Anticipated expiration: 2031-03-25

Abstract

The utility model discloses a blood vessel guiding sheath group, which comprises a sheath tube component, an expansion component and a puncture component, wherein the sheath tube component comprises a sheath tube, a tube seat and an extension tube, the sheath tube is connected with the front end of the tube seat, the extension tube is connected with the side surface of the tube seat, a hemostatic valve is arranged in the tube seat, and the end of the extension tube is connected with a three-way valve; the expansion assembly comprises an expansion pipe which is inserted into the sheath pipe when in use; the front end part of the expansion pipe is provided with an axial pipe hole, the front end part is also provided with an oblique side hole communicated with the axial pipe hole, and the rear end part of the expansion pipe is solid; the puncture assembly comprises a needle seat and a puncture needle fixedly connected to the needle seat, and the puncture needle is inserted into an axial tube hole at the front end part of the expansion tube through the inclined side hole when in use. The utility model discloses a blood vessel guide sheath group need not to use the seal wire can puncture and put the pipe, has greatly simplified the operation step and the degree of difficulty that the pipe process was put in the blood vessel puncture.

Description

Blood vessel guide sheath group

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to blood vessel guide sheath group.

Background

Since the concept of endovascular intervention was proposed in 1964 by Charles Dotter and melvin gias et al, there has been a dramatic development in vascular interventional techniques. The method for treating cardiovascular diseases by using an interventional method through a catheter technology is a commonly used treatment method at present, a doctor operates a catheter in an operation, various materials, instruments and the like are placed in the heart and arteriovenous vessels of a human body through the catheter, and the operation has the characteristics of small wound, short treatment course and strong targeting property. The vascular interventional operation is an operation technology for diagnosis and treatment through a vascular approach by using puncture needles, guide wires, catheters and other instruments under the guidance of medical imaging equipment. Vascular puncture is the primary step in completing a vascular interventional procedure.

The most widely used vascular puncture method by doctors at present is the seldinger puncture method. The specific operation is as follows: (1) performing venipuncture using a standard puncture needle; (2) a guide wire is placed to a target position through a puncture needle; (3) keeping the guide wire and pulling out the puncture needle along the guide wire; (4) the dilator and the sheath tube which are assembled in advance are placed into the blood vessel along the guide wire to a target position; (5) the sheath is reserved and the dilator and the guide wire are withdrawn along the sheath; (6) the sheath tube is sewed or applied on the surface of the skin to complete the puncture tube-placing process. Diagnosis and treatment of the target site may then be performed.

The blood vessel guiding sheath group in the prior art needs to comprise four instruments, namely a sheath tube, an expander, a puncture needle and a guide wire, the four instruments are required to be matched with each other for use in the implementation process, the steps are complex, the consumed time is long, and the efficiency is not high. Although the one-step puncture method can omit a guide wire, the method is mainly applied to an indwelling drainage catheter assembly, and the application of the indwelling drainage catheter assembly to a vascular guide sheath group has certain difficulty.

In order to reduce the time and intensity of the operation and improve the efficiency, a chinese patent with a publication number CN208464215U (publication date is 2019, 2, and 5) discloses a vascular catheter sheath, which includes a sheath assembly, a dilator and a puncture needle. The vascular catheter sheath organically combines a seldinger method and a one-step puncture method for puncture, and specifically comprises the steps of inserting a puncture needle, then pushing a dilator, enabling a guide wire to enter a blood vessel along the dilator and positioning the blood vessel to a target position, and further pushing a sheath tube to the target position along the guide wire. However, this solution still requires the use of a guide wire, which is cumbersome.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a blood vessel guide sheath group, this blood vessel guide sheath group need not to use the seal wire can puncture and put the pipe, has greatly simplified the operation step and the degree of difficulty that the pipe process was put in the blood vessel puncture, has higher security performance concurrently.

In order to solve the technical problem, the utility model provides a following technical scheme:

the utility model provides a blood vessel guide sheath group, include:

the sheath tube assembly comprises a sheath tube, a tube seat and an extension tube, the sheath tube is connected to the front end of the tube seat, the extension tube is connected to the side surface of the tube seat, a hemostasis valve is arranged in the tube seat, and the tail end of the extension tube is connected with a three-way valve;

the expansion assembly comprises an expansion pipe, and the expansion pipe is inserted into the sheath pipe when in use; the front end part of the expansion pipe is provided with an axial pipe hole, the front end part is also provided with an oblique side hole communicated with the axial pipe hole, and the rear end part of the expansion pipe is solid; and

and the puncture assembly comprises a needle seat and a puncture needle fixedly connected to the needle seat, and the puncture needle passes through the inclined side hole and is inserted into the axial tube hole at the front end part of the expansion tube when in use.

Furthermore, a salient point or a clamping piece is arranged on the puncture needle and used for controlling the depth of the puncture needle inserted into the blood vessel.

Further, the convex point and the puncture needle are integrally formed.

Further, the outer diameter of the front end of the expanding tube is smaller than that of the middle section, and the surface of the expanding tube smoothly transits from the front end to the middle section.

Further, the surface of the expanding tube is coated with a hydrophilic coating.

Further, the stent is a stent made from medical grade HDPE.

Furthermore, scale marks are arranged on the front end part and the rear end part of the expansion pipe.

Furthermore, the outer surface of the sheath tube is provided with scale marks.

Further, a fixing ring is arranged on the tube seat.

Further, the sheath is a sheath made from medical grade HDPE.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the blood vessel guiding sheath group of the utility model has the advantages that the expanding tube not only can expand the puncture opening, but also has the guiding function of the guide wire; the vessel guide sheath group can complete the puncture and catheterization process without a guide wire, thereby simplifying the operation steps and difficulty of the vessel puncture and catheterization process and improving the efficiency of puncture and catheterization.

Drawings

Fig. 1 is a schematic structural view of a sheath assembly according to the present invention;

FIG. 2 is a schematic view of the expansion assembly of the present invention;

fig. 3 is a schematic structural view of the puncture assembly of the present invention;

FIG. 4 is a schematic view of the assembly of the puncture assembly and the expansion assembly;

FIG. 5 is an assembled view of the expansion assembly and the sheath assembly;

the reference numbers in the figures illustrate: 100. a sheath assembly; 110. a sheath tube; 120. a tube holder; 130. an extension tube; 140. a three-way valve; 150. a fixing ring; 200. an expansion assembly; 210. an expansion tube; 220. an axial tube bore; 230. an oblique side hole; 300. a puncture assembly; 310. puncturing needle; 320. a needle seat; 330. and (4) bumps.

Detailed Description

The present invention is further described with reference to the following drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The utility model provides a need not the seal wire and can accomplish the blood vessel guide sheath group of puncture catheterization, it includes sheath pipe subassembly 100, expansion subassembly 200 and puncture subassembly 300.

Referring to fig. 1, the sheath assembly 100 includes a sheath 110, a stem 120, and an extension tube 130, wherein the sheath 110 is connected to a front end of the stem 120, and the extension tube 130 is connected to a side surface of the stem 120. A hemostatic valve is arranged in the tube holder 120, and the tail end of the extension tube 130 is connected with a three-way valve 140. The preferred material of the sheath 110 is medical grade HDPE, which has a smooth surface and good toughness. Preferably, the inner diameter of the sheath 110 is 2.1 + -0.1 mm, the outer diameter is 2.6 + -0.1 mm, and the effective length is 100-120 mm. In order to facilitate the fixation of the sheath assembly 100 to the skin, a fixing ring 150 is provided on the tube holder 120. Further, it is preferable that a graduation mark is provided on the sheath 110 so that the depth of the sheath 110 into the blood vessel can be visually determined.

The stent assembly 200 includes a stent 210, and the stent 210 is inserted into the sheath 110 of the sheath assembly 100 in use. Referring to fig. 2, the front end of the expandable tubular 210 has an axial tubular hole 220, and the front end is further opened with an oblique side hole 230 communicating with the axial tubular hole 220, and the rear end of the expandable tubular 210 is solid. The design of hollow front end and solid rear end makes the front end of the dilating tube 210 flexible and easy to bend, thereby facilitating the blood vessel entry, while the rear end has relatively high hardness, thereby ensuring that the dilating tube 210 is not easy to bend when advancing in the blood vessel and improving the convenience of the dilating tube 210 entry. The material of the expanding tube 210 is preferably medical grade HDPE, has a smooth surface and good toughness, and can be formed by injection molding, extrusion, and the like.

In this embodiment, the outer diameter of the front end of the dilation tube 210 is smaller than the outer diameter of the middle section, and the surface of the dilation tube 210 smoothly transitions from the front end to the middle section, and is integrally tapered, and the outer surface is smoother, so that the dilation tube 210 can better enter the blood vessel. Further, in order to facilitate the entry of the dilation tube 210 into the blood vessel, the surface of the dilation tube 210 may be coated with a hydrophilic coating. In order to control the depth of the dilation tube 210 into the blood vessel, it is preferable that a graduation mark is provided at the front end of the dilation tube 210. In addition, in order to precisely control the relative positions of the dilation tube 210 and the sheath 110, it is preferable that a graduation mark is provided at the trailing end of the dilation tube 210. The scale lines may be formed on the surface of the extension tube 210 by laser marking or ink printing.

Referring to fig. 3, the puncture assembly 300 includes a hub 320 and a puncture needle 310 fixedly connected to the hub 320, the puncture needle 310 is a solid needle body, the material of the solid needle body is preferably 304 stainless steel, 317 stainless steel or 17-4 stainless steel, the outer diameter of the puncture needle 310 is preferably 0.6-1.0 mm, and the effective length is preferably 30-80 mm. Hub 320 is preferably injection molded using medical grade ABS. When in use, the puncture needle 310 is inserted into the axial tube hole 220 of the front end of the dilation tube 210 through the inclined side hole 230 on the surface of the dilation tube 210, and the front end of the puncture needle 310 is exposed from the axial tube hole 220, so that the puncture needle can be punctured into a blood vessel.

To better control the depth to which the needle 310 penetrates the blood vessel, in one embodiment, a bump 330 is provided on the needle 310, the bump 330 preferably being integrally formed with the needle 310. When the puncture needle 310 is inserted into the axial tube hole 220 through the inclined side hole 230 of the dilation tube 210, the protrusion 330 can be stuck on the surface of the dilation tube 210, thereby preventing further insertion of the puncture needle 310. By controlling the position of the protrusion 330 on the puncture needle 310, the length of the puncture needle 310 exposed out of the axial tube hole 220 can be controlled, so that the depth of the puncture needle 310 penetrating into the blood vessel can be controlled, and the puncture is prevented from being too deep. Preferably, the distance between the protruding point 330 and the tip of the puncture needle 310 is 8 to 15 mm. In another embodiment, the puncture needle 310 is provided with an engaging member, which also serves to control the depth of the puncture needle 310 penetrating into the blood vessel. In addition, in other embodiments, the protruding point 330 on the puncture needle 310 may also be a movable protruding point 330, and the movement and positioning of the protruding point 330 may be realized by providing a control part. Compared with the fixed salient point 330, the puncture needle 310 with the movable salient point 330 can adjust the exposed length of the needle head, and the puncture needle 310 can be suitable for various people without replacing.

The utility model discloses a use method of blood vessel guide sheath group specifically as follows:

before puncturing, the puncture needle 310 is inserted into the inclined side hole 230 of the stent 210, and after assembly, the distance between the tip of the puncture needle 310 and the distal end surface of the stent 210 is 8 to 15mm (as shown in fig. 4). After the puncture position is found, the assembled assembly is inserted into the blood vessel from the puncture position, and the depth of the needle point of the puncture needle 310 entering the blood vessel is not more than 15 mm; then, pushing the expansion pipe 210 into the blood vessel, wherein the depth of the expansion pipe 210 entering the blood vessel is 8-15 mm; then the dilation tube 210 is retained and the puncture needle 310 is withdrawn; further pushing the expansion pipe 210, and stopping when the depth of the expansion pipe 210 entering the blood vessel is 30-35 mm; then, the front end of the sheath tube 110 is sleeved into the tail end of the dilating tube 210, the dilating tube 210 is fixed, and then the sheath tube 110 is pushed, and the sheath tube is stopped when the tail end of the dilator exceeds the tube seat 120 (as shown in fig. 5); then the expanding tube 210 and the sheath tube 110 are pushed together to the target position; finally, the sheath 110 is retained and the dilating tube 210 is withdrawn, thus completing the puncture catheterization process.

To sum up, the utility model discloses a blood vessel guide sheath group need not the seal wire and can accomplish the puncture and put the pipe process, has simplified the operation step and the degree of difficulty of blood vessel puncture and put the pipe process, has improved the puncture and has put the efficiency of pipe.

The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutes or changes made by the technical personnel in the technical field on the basis of the utility model are all within the protection scope of the utility model. The protection scope of the present invention is subject to the claims.

Claims

1. A vascular access sheath set, comprising:

2. The vessel introducer sheath set as defined in claim 1, wherein the puncture needle is provided with a protrusion or a fastener for controlling the depth of insertion of the puncture needle into the vessel.

3. The vascular introducer sheath assembly of claim 2, wherein the tabs are integrally formed with the needle.

4. The vascular access sheath assembly of claim 1, wherein the outer diameter of the distal end of the dilation tube is smaller than the outer diameter of the middle section, and the surface of the dilation tube smoothly transitions from the distal end to the middle section.

5. The vascular access sheath assembly of claim 1, wherein the surface of the dilation tube is coated with a hydrophilic coating.

6. The vascular access sheath of claim 1, wherein the stent is a medical-grade HDPE stent.

7. The vessel introducer sheath set as set forth in claim 1, wherein the dilating tubes are provided with graduations on both the front and rear end portions thereof.

8. The vessel introducer sheath set of claim 1, wherein the sheath has graduations on the outer surface thereof.

9. The vessel introducer sheath assembly of claim 1, wherein the hub includes a retaining ring.

10. The vascular access sheath of claim 1, wherein the sheath is a sheath made of medical grade HDPE.