CN101439210A

CN101439210A - Medical injection syringe with multi-cavity chamber

Info

Publication number: CN101439210A
Application number: CNA2009100000335A
Authority: CN
Inventors: 邢茂; 卢来春; 张蓉; 黄春基; 李芙蓉; 刘同华; 曹健
Original assignee: Second Affiliated Hospital of TMMU
Current assignee: Third Military Medical University TMMU; Second Affiliated Hospital of TMMU
Priority date: 2009-01-05
Filing date: 2009-01-05
Publication date: 2009-05-27
Anticipated expiration: 2029-01-05
Also published as: CN101439210B

Abstract

The invention relates to a miscible and multicavity injector which is used for human body injection. The injector comprises a syringe, a push rod, a drug outlet, a syringe needle and a movable cover, the lower part of the syringe is sequentially sealed and divided into a plurality of cavities by baffle plates, a telescopic rod is arranged in the middle of the cavities, the baffle plates are hermetically connected with the telescopic rod, the uppermost layer of the cavities is movably sealed by a push plate, the top end of the telescopic rod passes through the push plate, the position at which the telescopic rod is exposed from the push plate end is provided with external threads, sealing is formed between the lowest rod of the telescopic rod and a syringe outlet, the push rod is arranged at the upper part of the syringe, and the diameter of the front end of the push rod is larger than that of the telescopic rod and the front end of the push rod is provided with internal threads. In the injector, a plurality of medicaments which need mixing are separated by the soft baffle plates, the telescopic rod is pulled up by the screw threads in the push rod, meanwhile, the purposes of damaging the baffle plates sealing various cavities and opening a liquid outlet hole is achieved; a first segment of the telescopic rod can fully hold previous three segments, thus achieving the purpose of rapidly mixing while injecting; the injector is conveniently used and easily carried, and a projection arranged at the top end of the push rod is increased to prevent the push rod from being moved by an integrated syringe; and an enclosed syringe needle helps ensure safety and hygiene. The proposal can minimize the injection time in a battlefield.

Description

Medical injection syringe with multi-cavity chamber

Technical field

The present invention relates to a kind of medical apparatus and instruments, specifically relate to the mixing of a kind of human injection of being used for, injection syringe with multi-cavity chamber

Background technology

In modernized war, the use probability maximum of chemical weapons, at present under the situation that some chemical weapons are poisoned, need several blended medicines to detoxify, but what adopt now is one bottle one bottle mixing, delayed the time like this, and wherein nerve toxicant is one of chemical warfare agent of known toxicity maximum, hazard boundary extensively, can cause a large amount of gas casualtys in extremely short time, untimely treatment then causes death very soon, according to very fast at nerve toxicant at present to the aged speed of target spot enzyme, about 2 minutes; The data record is also arranged, and the people can cause death in 1 minute after sucking the soman steam of several mouthfuls of high concentrations.Therefore, when chemical warfare takes place, need the soldier to finish in the extremely short time to save oneself and rescue mutually, the dosage form of its first aid counterpoison must be selected injection.Yan Zhi compound injection at first owing to can't solve the problem of stability, is that three or four syringes are injected successively basically, has so both caused poisoner's misery, more incured loss through delay the poisoning therapeutic time.Under high-intensity operation emergency rating, require the soldier to use many syringes such as atropine, oximes reactivator, anticonvulsant to inject successively and obviously can't satisfy the treatment needs, in order to fight for life with the Death, shorten therapeutic time as much as possible, and the difficult problem of solution compatibility of drugs stability, country of NATO takes the lead in carrying out the research of multicell syringe.Holland is the not enemy spray of development at first, interior dress 3.9ml medicament, be divided in its syringe three every, can be respectively charged into three kinds of medicaments that should not mix mutually, as atropine, obidoxime chloride and stabilize.The U.S. and country of most NATO are also in this dosage form of equipment at present.In addition, a kind of injection type that has stable tablet space is also equipped by states such as Britain, Holland, Belgium, Luxembourg, can be used to be respectively charged into liquid and tablet.But use multi-cavity chamber syringe to be mostly disposablely to use at present or chamber very little or volume is too big, the inconvenience of cause use, carrying, and the complex structure of a lot of syringes, process is used complicated, does not adapt to this special use occasion of battlefield.

Patent ZL200520052591.3 has introduced a kind of two-chamber prefilled syringe, its structure utilizes one to be divided into bilevel needle tubing, every layer has individual piston plate, and the diameter of two-layer syringe is unequal, and the upper strata syringe is moved the piston of shutoff lower floor syringe in the syringe of upper strata to during use greater than lower floor's syringe, utilize two-layer syringe diameter difference, behind the confection, it is downward to promote injection rod again, and medicament is released, though this mode has two chambers, reached blended purpose, but needed upwards pulling earlier before use, the syringe of this scheme is oversize, use and carry inconvenience, and adopt interim mixing required time long, effect is slow, can't tackle emergency.

Summary of the invention

For addressing the above problem, this programme provides following a kind of scheme:

A kind of injection syringe with multi-cavity chamber, comprise syringe, push rod, medicine outlet, syringe needle and removable cover, it is characterized in that, described syringe bottom is sealed successively by dividing plate and is divided into a plurality of cavity volumes, expansion link is arranged in the middle of the described cavity volume, described dividing plate and expansion link are tightly connected, the described cavity volume the superiors are by the push pedal movable sealing, described expansion link passes the push pedal center hole topmost, described expansion link exposes the push pedal end external screw thread, and described expansion link goes out the interruption-forming sealing with syringe bottom, and described injection rod is installed in syringe top, described injection rod point diameter is greater than the expansion link diameter, and front end has female thread.

The another kind of optimal way of this programme: there is intilted projection inside, described injection rod top, described injection rod side has and the projection corresponding opening, described injection rod top is inserted with and pushes away handle, the described handle front end that pushes away has clamp, described clamp position and size corresponding with bump position can eject projection the injection rod lateral opening, and described projection is stuck in the syringe top with injection rod after stretching out from opening.

An optimal way again of this programme: fluted in the middle of the described injection rod projection, described groove snaps in the shrouding of syringe upper end.

The another optimal way of this programme: described injection rod front end has the outside projection of circle.

An also optimal way of this programme: described retracting cylinder and push pedal sealing flexibly connect.

An optimal way again of this programme: described syringe front end be equipped with can before and after active removable cover, injection tube the projection that prevents that removable cover from coming off arranged foremost, compression spring is installed in removable cover, the removable cover front end has needle outlet.

This programme utilizes soft dividing plate to separate the blended medicament of several needs, utilize the interior screw thread of push rod with the expansion link pull-up, finish the dividing plate of each chamber of breakseal simultaneously and opened the purpose of liquid outlet, and the expansion link first segment can hold into first three joint fully, reached the purpose that one side rapid mixing is injected on one side, adopt the convenient use of integral type injection tube, be easy to carry, increased the vertical projection of push rod and can prevent that throw-out lever is moved, adopt closed syringe needle, guaranteed safety and health, this programme can farthest reduce the service time on the battlefield.

Description of drawings

Fig. 1 syringe sketch map

Fig. 2 push rod front end projection sketch map

The specific embodiment

As shown in Figure 1, this programme specific operation process is as follows, syringe 1 bottom uses organic material dividing plate 16 to be divided into three cavity volumes 8, cavity volume 8 upper stratas connect with push pedal 2 movable sealings, so just form the chamber of four powder charge agent in syringe 1 bottom, in the middle of four cavity volumes 8, there is one to run through expansion link 3, being tightly connected with syringe 1 medicine outlet 5 bottom of expansion link 3, expansion link 3 topmost passes push pedal 2 and exposes a part, expansion link 3 also is that movable sealing is connected with push pedal 2 junctions, each layer organic material dividing plate 16 in the cavity volume 8 is fixed on the expansion link 3, just form four independent fully and seal cavity volumes like this in the syringe 1, can insert different medicaments respectively, expansion link 3 outstanding dividing plate 2 part outer surfaces have external screw thread 11, in the middle of the upper closure plate of syringe 1, be equipped with and run through push rod 6, the diameter of push rod 6 is greater than the diameter of expansion link 3, at push rod 6 front ends the outwards protruding circle 15 of protrusion of circle is arranged, there is female thread 14 inside, position, push rod 6 front end slightly upper, be equipped with two to rectangular 10 of axle center inclination in the inside, upper end of push rod 6, rectangular 10 1 ends are fixed on inside, push rod 6 top, rectangular 10 other ends have the projection 9 towards the push rod outer wall, projection 9 is positioned at the top of syringe closure plate, have two bayonet sockets in push rod 6 and projection 9 corresponding places, be inserted with one in the upper end of push rod 6 and push away handle 7, push away handle 7 shapes and adopt upper end band circular slab, cylinder 13 of circular slab center fixed, the other end of cylinder 13 is fixed with a little circular clamp 12, in the time of in pushing away handle 7 insertion push rods 6, the circular clamp 12 of front end just in time is stuck in two projection 9 places of rectangular 10, projection 9 outside bayonet sockets from push rod 6 are released, push rod 6 is stuck on the closure plate of syringe 1, it can not pressed by accident.

Syringe medicine outlet 5 ends are installed one can be along the up and down removable cover 20 of syringe 1, setting pressure spring 21 in the removable cover 20, leave needle outlet 22 on the removable cover 21, at ordinary times under the effect of compression spring 21, removable cover 21 covers syringe needle 4, syringe needle 4 exposes when depressing removable cover 20, and there is a circle projection 24 syringe 1 bottom, can prevent that removable cover 20 from slipping out.

As shown in Figure 2, projection 9 has and syringe closure plate corresponding groove 23 towards push rod 6 faces, and when projection 9 was released by clamp 12, groove 23 just in time was stuck on the closure plate, makes the push rod 6 can not be up and down.

To push away handle 7 during use transfers in push rod 6, the raised line 9 of rectangular 12 front ends is deviate from from push rod 6 bayonet sockets under self elastic force effect, this moment can be by lower push-rod 6, protruding circle 15 retainings of push rod 6 front ends are in push pedal 2, push rod 6 front ends snap in the expansion link screw end, push rod 6 internal threads 14 dock with expansion link 3 front end outside nuts 11, twisting push rod 6 this moment screws in expansion link 3 in the push rod 6, expansion link 3 is torn medicine outlet 5 sealings bottom, each inorganic material dividing plate 16 that connects in the middle of the expansion link 3 is also torn, continue to promote push rod 6 this moment, push rod 6 utilizes the protruding circle 15 of front end to promote push pedal 2 medicament in the cavity volume is released from medicine outlet 5, in the traveling process of push pedal 2, expansion link 3 interludes are successively in first section inner chamber of retraction, because push pedal 2 is that movable sealing is connected with expansion link 3 employings, when therefore push pedal 2 moves to the syringe lower end, push pedal 2 slides into lowermost end for 3 first sections along retracting cylinder, expansion link 3 enters push rod 6 inside fully, the removable cover 20 of syringe front end can upwards slide along syringe 1 when injection automatically, finishes whole injection process thus.

Claims

1, a kind of injection syringe with multi-cavity chamber, comprise syringe (1), push rod (6), medicine outlet (5), syringe needle (4) and removable cover (20), it is characterized in that, described syringe (1) bottom is sealed successively by dividing plate (16) and is divided into a plurality of cavity volumes (8), expansion link (3) is arranged in the middle of the described cavity volume (8), described dividing plate (16) is tightly connected with expansion link (3), the described cavity volume the superiors are by push pedal (2) movable sealing, described expansion link (3) passes push pedal (2) topmost, described expansion link (3) exposes the push pedal end external screw thread (11), described expansion link (3) forms sealing with syringe outlet (5) bottom, described push rod (6) is installed in syringe (1) top, and described push rod (6) point diameter has female thread (14) greater than expansion link (3) diameter and front end.

2, a kind of injection syringe with multi-cavity chamber as claimed in claim 1, it is characterized in that, there are rectangular (10) of intilted band projection (9) described push rod (6) inside, top, described push rod (6) side has and projection (9) corresponding opening, described push rod (6) top is inserted with and pushes away handle (7), described handle (7) front end that pushes away has clamp (12), described clamp (12) position and size corresponding with projection (9) position can eject projection (9) push rod (6) lateral opening, after described projection (9) stretches out from opening push rod (9) is stuck in syringe (1) top.

3, a kind of injection syringe with multi-cavity chamber as claimed in claim 2 is characterized in that, in the middle of the described projection (9) fluted (23), described groove (23) snaps in the shrouding of syringe (1) upper end.

As claim 1,2 or 3 described a kind of injection syringe with multi-cavity chamber, it is characterized in that 4, described push rod (6) front end has the outside projection (15) of circle.

5, a kind of injection syringe with multi-cavity chamber as claimed in claim 4 is characterized in that, described retracting cylinder (3) flexibly connects with push pedal (2) sealing.

6, a kind of injection syringe with multi-cavity chamber as claimed in claim 5, it is characterized in that, described syringe (1) front end be equipped with can before and after active removable cover (20), prevent the projection (24) that removable cover (20) comes off having foremost of syringe (1), compression spring (21) is installed in removable cover (20), and removable cover (20) front end has needle outlet (22).