CN111603662A - Interventional catheter assembly - Google Patents

Abstract

The utility model provides an intervene pipe combination, includes pjncture needle, sheath, pipe, and pjncture needle and pipe can both wear in the sheath, and the pjncture needle includes needle tubing and needle file, and the sheath includes sheath pipe and sheath seat, is equipped with the line of splitting on the sheath pipe, and the line of splitting extends to the sheath seat, runs through whole sheath, and the pipe includes hose and tube socket, and fixed blade holder can be dismantled to tube socket rear end surface, fixed cutting knife on the blade holder, and the cutting edge of cutting knife is towards preceding. Compared with the prior art, the catheter has the technical effects that the catheter enters the blood vessel in an external supporting mode, so that the longitudinal degree and the surface smoothness of the catheter are not required to be selected, the material of the catheter can be selected by using polyurethane materials used for a central venous catheter and a PlCC catheter, and the long indwelling time of the device can be obtained.

Description

Interventional catheter assembly

Technical Field

The present invention relates to a medical device for infusion of liquids.

Background

The infusion can be used for infusing almost all liquid medicine to a human body through blood vessels so as to realize the purposes of treating and preventing diseases. In clinical practice, products such as central venous catheters, Peripherally Inserted Central Catheters (PICC) and indwelling needles are often used. The practical application operation of the central venous catheter and the PlCC is complex and is equivalent to a small-sized operation, while the operation of an indwelling needle is equivalent to a common venous transfusion, so the former is more complex than the latter; in addition, in terms of retention time, the treatment time of the indwelling needle product is generally 2-4 days, while the retention time of the central venous catheter and the PICC is more than 365 days, so that the indwelling needle product has obvious advantages and disadvantages compared with the central venous catheter and the PICC.

Disclosure of Invention

The technical problems to be solved by the invention are as follows: in clinic, a medical instrument and a technical scheme which are expected by medical staff and have the advantages of long retention time, small side effect and convenient operation are not shown and disclosed.

The technical scheme of the invention is as follows:

an interventional catheter combination comprises a puncture needle, a guide sheath and a catheter, wherein the puncture needle and the catheter can be penetrated in the guide sheath, the puncture needle comprises a needle tube and a needle seat, the guide sheath comprises a sheath tube and a sheath seat, a cleavage line is arranged on the sheath tube, the cleavage line extends to the sheath seat and penetrates through the whole guide sheath, the catheter comprises a hose and a tube seat, the outer surface of the rear end of the tube seat is detachably fixed with a cutter seat, a cutter is fixed on the cutter seat, and the cutting edge of the cutter faces the front; when the puncture needle penetrates into the sheath, the front end of the needle tube is exposed outside the sheath tube, and the needle seat is exposed at the rear side of the sheath seat; when the catheter is threaded in the guide sheath, the cutter holder is exposed at the rear side of the sheath holder, and the cutter is aligned with the rear end of the cutting line.

When the catheter is threaded inside the guide sheath, the front end of the flexible tube is exposed outside the sheath tube.

The pipe seat is fixed with the cutter seat through threads.

The cleavage line is a straight line.

Compared with the prior art, the catheter has the technical effects that the catheter enters the blood vessel in an external supporting mode, so that the longitudinal degree and the surface smoothness of the catheter are not required to be selected, the material of the catheter can be selected by using polyurethane materials used for a central venous catheter and a PlCC catheter, and the long indwelling time of the device can be obtained. Meanwhile, the difficulty of puncturing the needle and the difficulty of remaining the needle are convenient for the operation of medical personnel.

Drawings

Fig. 1 is a schematic view of a needle of the present invention.

Fig. 2 is a schematic view of the introducer sheath of the present invention.

Fig. 3 is a schematic view of a catheter of the present invention.

Fig. 4 is an enlarged schematic view of the right end of fig. 3.

Fig. 5 is a schematic view of the needle in cooperation with the sheath.

Fig. 6 is a schematic view of the catheter mated with the introducer sheath.

Fig. 7 is a perspective view of the needle hub.

Detailed Description

In this specification, the direction of pricking the human body is front, and the opposite direction is back.

An interventional catheter assembly comprises apuncture needle 10, aguide sheath 20 and acatheter 30, wherein both thepuncture needle 10 and thecatheter 30 can penetrate through theguide sheath 20.

Referring to fig. 1, aneedle 10 includes aneedle cannula 11 and ahub 12.

Referring to fig. 2, thesheath 20 includes asheath tube 21 and a sheath seat 23, acleavage line 22 is disposed on thesheath tube 21, and thecleavage line 22 extends to the sheath seat 23 and penetrates theentire sheath 20.

Referring to fig. 3, 4 and 7, theguide tube 30 includes aflexible tube 31 and atube holder 32, aholder 34 is detachably fixed to an outer surface of a rear end (right end in fig. 3) of thetube holder 32, acutter 35 is fixed to theholder 34, and ablade 36 of thecutter 35 faces forward.

When thepuncture needle 10 is inserted into thesheath 20, as shown in fig. 5, the forward end of theneedle tube 11 is exposed outside thesheath tube 21, and theneedle holder 12 is exposed on the rear side of the sheath holder 23.

When thecatheter 30 is threaded into theguide sheath 20, referring to fig. 6, the front end of theflexible tube 31 is exposed outside thesheath tube 21, thecutter holder 34 is exposed on the rear side of the sheath holder 23, and thecutter 35 is aligned with the rear end of thecleavage line 22. The technical feature "thecutter 35 is aligned with the rear end of thecleavage line 22" is to facilitate the tearing of thesheath 20.

For easy removal, thetube holder 32 is screwed to theholder 34.

To facilitate isolation, thecleavage lines 22 are straight lines.

The working principle is as follows:

when the patent needs to be used, the following steps can be carried out:

s1: the insertion of theneedle 10 into thesheath 20 can be done at the time of manufacture or can be assembled in the field. When the product is delivered from the factory, theguide sheath device 20 is arranged outside thepuncture needle 10 and assembled into a set.

S2: in treatment, the combination of thepuncture needle 10 and thesheath 20 is inserted into the skin and enters the blood vessel, the sheath treatment puncture needle is used for treating the blood vessel, and thepuncture needle 10 is withdrawn from the sheath after thesheath 20 enters the blood vessel.

S3: the catheter is pushed, thecatheter 30 is sent into the blood vessel through the inner cavity of theguide sheath 20, and the hose on the catheter is made to pass through the inner hole of the guide sheath to send the front end of the hose into the blood vessel.

S4: thesheath 20 is then torn to overcome the restriction of thecatheter 30 by thesheath 20, and thesheath 20 is withdrawn from the patient, leaving only thecatheter 30 in the patient and successfully establishing the infusion path.

S5: theholder 34 is separated from thetube seat 32.

The interventional catheter not only inherits the advantage of retention time of the traditional central venous catheter and PICC products, but also has the advantage of convenient operation of an indwelling needle product, has unique novelty and creativity, and is a new technical scheme between the technical fields of the central venous catheter, the PICC and the indwelling needle.

See the prior art for additional details.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the overall concept of the present invention, and these should also be considered as the protection scope of the present invention.

Claims (4)

1. An interventional catheter assembly, comprising: the puncture needle comprises a puncture needle (10), a guide sheath (20) and a catheter (30), wherein the puncture needle (10) and the catheter (30) can be penetrated in the guide sheath (20), the puncture needle (10) comprises a needle tube (11) and a needle seat (12), the guide sheath (20) comprises a sheath tube (21) and a sheath seat (23), a cleavage line (22) is arranged on the sheath tube (21), the cleavage line (22) extends to the sheath seat (23) and penetrates through the whole guide sheath (20), the catheter (30) comprises a hose (31) and a tube seat (32), the outer surface of the rear end of the tube seat (32) is detachably fixed with the blade seat (34), a cutting knife (35) is fixed on the blade seat (34), and the cutting edge (36) of the cutting knife (35) faces;

when the puncture needle (10) is inserted into the guide sheath (20), the front end of the needle tube (11) is exposed out of the sheath tube (21), and the needle seat (12) is exposed at the rear side of the sheath seat (23);

when the catheter (30) is inserted into the guide sheath (20), the cutter seat (34) is exposed at the rear side of the sheath seat (23), and the cutter (35) is aligned with the rear end of the cleavage line (22).

2. The interventional catheter assembly of claim 1, wherein: when the catheter (30) is inserted into the guide sheath (20), the front end of the flexible tube (31) is exposed outside the sheath tube (21).

3. The interventional catheter assembly of claim 1, wherein: the pipe seat (32) is fixed with the cutter seat (34) through screw threads.

4. The interventional catheter assembly of claim 1, wherein: the cleavage line (22) is a straight line.

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