CN211272878U

CN211272878U - Syringe for screwing suppository

Info

Publication number: CN211272878U
Application number: CN201921939198.4U
Authority: CN
Inventors: 王勇; 许伟; 徐浩
Original assignee: Affiliated Hospital of Xuzhou Medical University
Current assignee: Affiliated Hospital of Xuzhou Medical University
Priority date: 2019-11-11
Filing date: 2019-11-11
Publication date: 2020-08-18
Anticipated expiration: 2029-11-11

Abstract

The utility model discloses a syringe for screwing embolic agent, which comprises a syringe and a piston rod; the front end surface of the needle cylinder is provided with an injection tee joint, and the circumferential surface of the front part of the needle cylinder is provided with a dosing tee joint; the inside cavity of rotary column, the inside of rotary column front end is equipped with the internal thread stopper, the outside cover of rotary column front end inlays the joint in the inside of connecting pipe, the internal thread looks adaptation in the middle of the external screw thread of external screw thread pole and the internal thread stopper, the front end of external screw thread pole is equipped with the rubber buffer, the rear end of external screw thread pole is located inside the rotary column after passing the internal thread hole in the middle of the internal thread stopper, the rubber buffer is located the inside of cylinder, the front end of connecting pipe is connected with the rear end of cylinder. The utility model only needs to switch two tee joints in the whole process from extracting the suppository to injecting the suppository, does not need to plug and pull the injector, and avoids gas from entering the injector while the operation is simple; the extraction and injection processes of the injector are in a screwing mode instead of a pressing and pulling mode, so that the pressing injury of the piston rod of the injector to the hands of a doctor is reduced.

Description

Syringe for screwing suppository

Technical Field

The utility model relates to a syringe, concretely relates to twist and twist stopper agent syringe soon.

Background

‌ the embolization agent is injected through the microcatheter in the process of tumor embolization treatment, the aperture of the microcatheter is small, when a large-diameter injector (such as 10ml and 20 ml) is used, the embolization agent can not be injected due to the pressure principle, only a small-diameter injector (such as 1ml and 2.5 ml) can be used, even if the small injector is used for injection, the force is still very hard, the push rod of the small injector is thin, so that when a doctor injects the embolization agent, the fingers or the palm of the doctor are subjected to a large reaction force, and the doctor feels great discomfort; in addition, when a small-diameter syringe is used, since the volume is small, a sufficient amount of the embolic agent cannot be injected at one time, so that frequent extraction from the embolic agent container and subsequent injection by the microcatheter are required, and frequent extraction and re-injection of the drug not only cause inconvenience in operation but also easily cause gas to enter the syringe, thereby increasing the probability of the drug contacting with air.

Disclosure of Invention

To the problem that above-mentioned prior art exists, the utility model provides a revolve wrong embolic agent syringe pushes laborsavingly, convenient operation, avoids in gaseous entering syringe.

In order to achieve the above object, the utility model provides a following technical scheme: a syringe for screwing embolic agent comprises a syringe barrel and a piston rod; the front end surface of the needle cylinder is provided with an injection tee joint, and the circumferential surface of the front part of the needle cylinder is provided with a dosing tee joint;

the piston rod includes the external screw thread pole, the rubber buffer, the rotary column, internal thread stopper and connecting pipe, the inside cavity of rotary column, the inside of rotary column front end is equipped with the internal thread stopper, the outside cover inlay card of rotary column front end is in the inside of connecting pipe, the internal thread looks adaptation in the internal thread hole in the middle of the external screw thread pole and the internal thread stopper, the front end of external screw thread pole is equipped with the rubber buffer, the rear end of external screw thread pole is located inside the rotary column after passing the internal thread hole in the middle of the internal thread stopper, the rubber buffer is located the inside of cylinder, the front end of connecting pipe is connected with the rear end of cylinder.

Further, rubber buffer and cylinder interference fit increase the sealing performance of rubber buffer and cylinder.

Furthermore, the radial section of the rotary column is a regular hexagon.

Compared with the prior art, the whole process from extracting the embolic agent to injecting the embolic agent of the utility model only needs to switch two tee joints without plugging and unplugging the injector, thereby avoiding the gas from entering the injector while the operation is simple; the extraction and injection processes of the injector are in a screwing mode instead of a pressing and pulling mode, so that the pressing injury of the piston rod of the injector to the hands of a doctor is reduced.

Drawings

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

FIG. 2 is a schematic view of a piston rod;

in the figure: 1. the injection device comprises a needle cylinder 11, an injection tee joint 12, a dosing tee joint 2, a piston rod 21, an external thread rod 22, a rubber plug 23, a rotary column 24, an internal thread plug 25 and a connecting pipe.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1 and fig. 2, the utility model provides a technical solution: comprises a needle cylinder 1 and a piston rod 2; the front end face of the needle cylinder 1 is provided with an injection tee joint 11, the front circumferential face of the needle cylinder 1 is provided with a dosing tee joint 12, the injection tee joint 11 is communicated with a micro catheter, and the dosing tee joint 12 is communicated with a suppository container;

the piston rod 2 comprises an external thread rod 21, a rubber plug 22, a rotary column 23, an internal thread plug 24 and a connecting pipe 25, the rotary column 23 is hollow inside, the internal thread plug 24 is arranged inside the front end of the rotary column 23, the outer part of the front end of the rotary column 23 is sleeved and clamped inside the connecting pipe 25, an annular groove is formed in the outer side circumferential surface of the front end of the rotary column 23, a convex ring is formed in the inner circumferential surface of the rear end of the connecting pipe 25 and clamped in the annular groove, so that the rotary column 23 can relatively rotate with the connecting pipe 25, the external thread of the external thread rod 21 is matched with the internal thread of the internal thread hole in the middle of the internal thread plug 24, the rubber plug 22 is arranged at the front end of the external thread rod 21, the rear end of the external thread rod 21 penetrates through the internal thread hole in the middle of the internal thread plug 24 and then is positioned inside;

the rubber stopper 22 is positioned in the syringe 1, and the front end of the connecting pipe 25 is connected with the rear end of the syringe 1; when the cylinder 1 is held and the screw cylinder 23 is rotated, the internally threaded plug 24 is also rotated together with the screw cylinder 23, and the externally threaded rod 21 is rotatably moved forward or backward by the screw engagement.

When the injection tee joint 11 and the dosing tee joint 12 are in a closed state, the injection tee joint 11 and the dosing tee joint 12 are respectively communicated with a micro catheter and a suppository container, the dosing tee joint 12 is opened, the rotary column 23 is rotated outwards, the external threaded rod 21 and the rubber plug 22 move outwards together to draw the suppository in the suppository container into the syringe 1, when a certain amount of the suppository is drawn out, the dosing tee joint 12 is closed, the injection tee joint 11 is opened simultaneously, and the rotary column 23 is rotated inwards, so that the external threaded rod 21 and the rubber plug 22 move inwards together, and the injection of the suppository through the micro catheter is realized; because the small-diameter injector can not meet the requirement of the metering of one-time extraction, the injection tee 11 is closed again, the dosing tee 12 is opened at the same time, the plug agent is extracted into the needle cylinder 1 by rotating the rotary column 23 outwards, the dosing tee 12 is closed when a certain amount of the plug agent is extracted, the injection tee 11 is opened at the same time, and then the rotary column 23 is rotated inwards to realize the injection of the plug agent through the micro-catheter; the extraction and injection are repeated until the injection is performed in a predetermined amount.

The whole process from extracting the embolic agent to injecting the embolic agent only needs to switch two tee joints without plugging and unplugging the injector, so that the operation is simple and gas is prevented from entering the injector; the extraction and injection process of the injector is in a screwing mode instead of a pressing and pulling mode, so that the pressing damage of the injector piston rod 2 to the hands of a doctor is reduced, and the metering is more accurate when the medicine is injected by injecting the medicine in the screwing mode.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. 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.

The above, only do the preferred embodiment of the present invention, not used to limit the present invention, all the technical matters of the present invention should be included in the protection scope of the present invention for any slight modification, equivalent replacement and improvement of the above embodiments.

Claims

1. A syringe for screwing embolic agent, which comprises a syringe barrel (1) and a piston rod (2); it is characterized in that the front end surface of the syringe (1) is provided with an injection tee joint (11), and the circumferential surface of the front part of the syringe (1) is provided with a dosing tee joint (12);

piston rod (2) include external screw thread pole (21), rubber buffer (22), column (23) revolves, internal thread stopper (24) and connecting pipe (25), column (23) revolves inside cavity, the inside of column (23) front end is equipped with internal thread stopper (24), the outside cover of column (23) front end inlays the joint in the inside of connecting pipe (25), the external screw thread of external screw thread pole (21) and the internal thread looks adaptation of the internal thread hole in the middle of internal thread stopper (24), the front end of external screw thread pole (21) is equipped with rubber buffer (22), the rear end of external screw thread pole (21) is located inside column (23) after passing the internal thread hole in the middle of internal thread stopper (24), rubber buffer (22) are located the inside of cylinder (1), the front end and the rear end of cylinder (1) of connecting pipe (25) are connected.

2. A corking syringe according to claim 1, wherein: the rubber plug (22) is in interference fit with the needle cylinder (1).

3. A corking syringe according to claim 1, wherein: the radial section of the rotary column (23) is a regular hexagon.