CN208552726U - A kind of combined type medical fluid precision floating plug filtration syringe - Google Patents

Abstract

The utility model provides a kind of combined type medical fluid precision floating plug filtration syringe, it include: filter device end, injection tube and injection rod, the injection rod is inserted into injection tube, injection tube front end is connect with filter device ends screw, filter device end front end is provided with needle holder, and rear end is provided with filter end；The floating plug that the filter device end includes filter block and is movably arranged on inside filter block, filter block inside form filter chamber, annular filter film are arranged in filter chamber；When syringe drawing liquid, floating plug is moved to the floating plug channel roof of filter block, and liquid enters filter chamber from the blind hole of floating plug；When syringe drain, floating plug channel roof of the floating plug far from filter block, the liquid of filter chamber enters the blind hole of floating plug by annular filter film, filter block peripheral channel.The syringe makes it directly filter particle and precipitating when preparing liquid, achievees the effect that secondary filter, it is ensured that patient medication safety.

Description

A kind of combined type medical fluid precision floating plug filtration syringe

Technical field

The utility model relates to the field of medical instrument technology, in particular to a kind of combined type medical fluid precision floating plug filtering injection Device.

Background technique

The conventional syringe clinically used at present, is generally made of plastic needle cylinder, rubber piston and core bar, before core bar Portion is set in plastic needle cylinder, and the front end of core bar is equipped with rubber piston, is sealed between rubber piston and plastic needle cylinder inner wall.This note The shortcomings that emitter is: only simple liquid medicine injection does not have the function being filtered to the particulate matter in medical fluid.

With the continuous improvement of modern medicine level and people 's material life level, clinical application particulate matter is to human body Harm be commonly numerous medical personnels and recognized, while some patientss also by various approach to insoluble micro- in medical fluid The harm of grain is recognized, they are increasingly enhanced clinical application quality and awareness of safety, it is desirable that also higher and higher.But current state Inside syringe used in clinic in the market does not have the function of the particulate matter in filtering liquid medicine, a large amount of insoluble in medical fluid The careless medical fluid of particle is injected together in blood into the human body.It is larger (to be greater than blood vessel diameter, adult is generally 6~8 μm；Children Especially infant's capillary is typically up to 2~3 μm thinner) particle can directly contribute local circulation obstacle and cause blood vessel bolt Plug serious person causes local stoppages and for hypoxgia, and histanoxia generates oedema and inflammation；Less than this diameter can be direct with blood flow It causes thrombus or since foreign matter intrusion tissue causes erythrocyte aggregation to increase volume around particle, causes granuloma, and Since quantity mostly can equally cause blood vessel embolism.In the present age, especially infant, children accept the risk more greatly, because of human body capillary Blood vessel is generally 6~8 μm, and children's especially infant's capillary is typically up to thinner 2~3 μm, as one can imagine infant, youngster Child undertakes great security risk when receiving medication.However a kind of Combined injector of simple possible can not now Have the function of dosing and carries out medical filtration.

Utility model content

In order to solve the problems existing in the prior art, the utility model provides a kind of combined type medical fluid precision floating plug filtering note Emitter.The syringe is not only at low cost, and filtering safe is easy to use, during dosing, filters it directly when preparing liquid Particle and precipitating, achieve the effect that secondary filter, it is ensured that patient medication safety.

In order to achieve the above objectives, the utility model uses following technological means:

A kind of combined type medical fluid precision floating plug filtration syringe, comprising: filter device end, injection tube and injection rod, institute The injection rod insertion injection tube stated, injection tube front end are connect with filter device end combined labyrinth and carbon gland, filter device end front end It is provided with needle holder, rear end is provided with filter end；The filter device end includes filter block and is movably arranged on filter block Internal floating plug, filter block inside form filter chamber, annular filter film are arranged in filter chamber；When syringe drawing liquid, floating plug is moved It moves to the floating plug channel roof of filter block, liquid enters filter chamber from the blind hole of floating plug；When syringe drain, floating plug is far from mistake The floating plug channel roof of filter block, the liquid of filter chamber enter the blind hole of floating plug by annular filter film, filter block peripheral channel.

The floating plug is boss structure, and its axis is provided with blind hole, be provided on floating plug convex platform side wall with it is blind The fluid hole and inlet opening of hole connection；Be provided in filter block with the matched floating plug channel of floating plug shape, floating plug channel small end with Filter chamber connection, filter chamber are provided with annular filter film in addition to floating plug channel small end exports；The company of being additionally provided on filter block Pass through the liquid outlet channel of filter chamber and floating plug channel big end；When the floating plug shaft shoulder and floating plug channel are adjacent to, blind hole by inlet opening with Filter chamber connection, fluid hole, liquid outlet channel are in sealing state；When the floating plug shaft shoulder and floating plug path clearance are arranged, blind hole is logical Cross fluid hole, liquid outlet channel is connected to filter chamber, inlet opening is in sealing state.

The liquid outlet channel is multiple, and is arranged along filter block axis.

The fluid hole and inlet opening is circumferentially uniformly distributed along floating plug.

The shape of the filter end inner cavity and the piston of injection rod front end matches.

The annular filter film is nuclear pore membrane, poly (ether sulfone) film, polyester film or nylon membrane.

The annular filter film pore size filter is 1.2~15 microns.

The needle holder is nipple or quick connector.

The injection tube front end is connect with filter device ends screw or fast insert is tightly connected.

Opposite and the prior art, the utility model have the advantage that

The Combined injector of the utility model, injection tube front end are connect with filter device ends screw, filter device end Head includes filter block and the floating plug being movably arranged on inside filter block, and when syringe drawing liquid, floating plug is moved to the floating of filter block Channel roof is filled in, liquid enters filter chamber from the blind hole at floating plug center, when syringe drain, floating plug of the floating plug far from filter block Channel roof, the liquid of filter chamber enter the blind hole of floating plug by annular filter film, filter block peripheral channel.To realize drawing liquid It does not filter, the function of drain filtering.Other workloads are not caused to user in filter device end built in the utility model, The filtering of medical fluid has been carried out while normal use.Not only at low cost, filtering safe is easy to use, during dosing, naked eyes Infusion safety hidden danger can be caused in coarse syringe needle injection infusion bottle (bag) of syringe by being not easy the particle found and precipitating, and The problems such as these particles are costly is filtered using precision infusion set, so that it is directly filtered particle and precipitating when preparing liquid, reaches To the effect of secondary filter, it is ensured that patient medication safety.

Further, floating plug is boss structure, be provided in filter block with the matched floating plug channel of floating plug shape, when floating plug axis When shoulder and floating plug channel are adjacent to, blind hole is connected to by inlet opening with filter chamber, and fluid hole, liquid outlet channel are in sealing state；When When the floating plug shaft shoulder and floating plug path clearance are arranged, blind hole is connected to by fluid hole, liquid outlet channel with filter chamber, and inlet opening is in close Envelope state.It is compared with common syringe, it is easy to operate, it is easy to use, also there is filtering function.

Further, injection tube and filter device end are fabricated structure；It can individually be manufactured when manufacture, when use It is combined again, it is easy to use convenient for manufacture and transport.

Detailed description of the invention

Fig. 1 is combined type medical fluid precision floating plug filtration syringe schematic diagram；

Fig. 2 is filter device end sectional view；

Fig. 3 is floating plug schematic diagram；

Fig. 4 is filter block schematic diagram；

Fig. 5 is filter block along A-A sectional view；

Fig. 6 is filter device end work principle of filter figure；

Wherein, 1 is filter device end；2 be injection tube；3 be injection rod；4 be piston；5 be filter end；6 be needle holder； 7 be floating plug；71 be blind hole；72 be fluid hole, and 73 be inlet opening, and 8 be filter block, and 81 be floating plug channel, and 82 be liquid outlet channel.

Specific embodiment

The utility model is described further in the following with reference to the drawings and specific embodiments, the utility model is not limited to following Embodiment.

As shown in Figures 1 to 5, a kind of combined type medical fluid precision floating plug filtration syringe of the utility model includes: filtering Device end 1, injection tube 2 and injection rod 3, the injection rod 3 are inserted into injection tube 2,2 front end of injection tube and filter device end 1 is threadedly coupled, and 1 front end of filter device end is provided with needle holder 6, and rear end is provided with filter end 5；The filter device end 1 includes filter block 8 and floating plug 7；Floating plug 7 is boss structure, and its axis is provided with blind hole 71, on 7 convex platform side wall of floating plug It is provided with the fluid hole 72 and inlet opening 73 being connected to blind hole 71；It is provided in filter block 8 logical with the matched floating plug of 7 shape of floating plug Road 81 forms filter chamber on the inside of filter block 8, and 81 small end of floating plug channel is connected to filter chamber, and filter chamber removes 81 small end of floating plug channel Annular filter film 9 is provided with other than outlet；The liquid out of connection filter chamber and 81 big end of floating plug channel is additionally provided on filter block 8 Channel 82；When 7 shaft shoulder of floating plug and floating plug channel 81 are adjacent to, blind hole 71 is connected to by inlet opening 73 with filter chamber, fluid hole 72, Liquid outlet channel 82 is in sealing state；When 7 shaft shoulder of floating plug and when 81 gap setting of floating plug channel, blind hole 71 by fluid hole 72, Liquid outlet channel 82 is connected to filter chamber, and inlet opening 73 is in sealing state.

As shown in figure 3, the fluid hole 72 and inlet opening 73 are circumferential uniformly distributed along floating plug 7.

As shown in figure 5, liquid outlet channel 82 is multiple, and is arranged along 8 axis of filter block.

Injection tube 2 is an integral molding structure with filter device end 1.It is clinical disposable.

As shown in Figure 1, injection tube 2 and filter device end 1 are fabricated structure；The size shape of filter device end 1 Match with 2 needle holder inner cavity of injection tube, 1 front end of filter device end is needle holder 6,6 insertion needle seat of needle holder when combination In inner cavity, and 2 inner wall of injection tube is connect with 1 combined labyrinth and carbon gland of filter device end.1 rear end of filter device end is filter end 5, 5 inner cavity of filter end and the shape of the piston 4 of 3 front end of injection rod match.

Wherein.Annular filter film 9 is nuclear pore membrane, poly (ether sulfone) film, polyester film or nylon membrane.9 filter hole of annular filter film Diameter is 1.2~15 microns.

Different syringe needles uses for convenience, and needle holder is nipple or quick connector.

As shown in figures 1 to 6, when the utility model is used, filter device end 1 will be first threadedly coupled with injection tube 2, Injection rod 3 is inserted into injection tube 2 again, medical fluid configuration can be carried out, and be able to carry out medical fluid secondary filter.First by injection rod 3 remove from injection tube 2, then filter device end 1 are fitted into injection tube 2, and be pushed into bottommost, finally insert injection rod 3 Enter in injection tube 2, medical fluid configuration can be carried out, and be able to carry out medical fluid secondary filter.When pulling injection rod 3 is displaced outwardly pumping When liquid, injection tube 2 generates negative pressure, and medical fluid enters the blind hole 71 of floating plug 7 under the action of negative pressure from syringe needle, due to 7 shaft shoulder of floating plug When being adjacent to floating plug channel 81, blind hole 71 is connected to by inlet opening 73 with filter chamber, and fluid hole 72, liquid outlet channel 82 are in sealing State；Medical fluid can only be connected to by several blind holes 71, inlet opening 73, filter chamber, carried out drawing liquid and entered in injection tube 2.Work as extruding When injection rod 3 moves inward drain, medical fluid is first passed through after annular filter film 9 is filtered, and enters blind hole by liquid outlet channel 82 71 are discharged in turn.Whole operation does not cause other workloads to user, and the mistake of medical fluid has been carried out while normal use Filter.

The utility model not only can also be filtered physiological saline, water, chemical reagent etc. with filtering liquid medicine.Structure Simply, it works well.

More than, the only preferred embodiment of the utility model is not limited only to the scope of the utility model, Fan Yiben The equivalence changes and modification that the content of utility model patent range is done all should be the technology scope of the utility model.

Claims (9)

1. a kind of combined type medical fluid precision floating plug filtration syringe characterized by comprising filter device end (1), injection tube (2) and injection rod (3), the injection rod (3) are inserted into injection tube (2), injection tube (2) front end and filter device end (1) group Box-like sealed connection, filter device end (1) front end are provided with needle holder (6), and rear end is provided with filter end (5)；The mistake Filter device end (1) includes filter block (8) and the floating plug (7) for being movably arranged on filter block (8) inside, shape on the inside of filter block (8) At filter chamber, annular filter film (9) are set in filter chamber；When syringe drawing liquid, floating plug (7) is moved to the floating of filter block (8) It fills at the top of channel (81), liquid enters filter chamber from the blind hole (71) of floating plug (7)；When syringe drain, floating plug (7) is far from mistake At the top of the floating plug channel (81) of filter block (8), the liquid of filter chamber enters by annular filter film (9), filter block (8) peripheral channel The blind hole (71) of floating plug (7).

2. a kind of combined type medical fluid precision floating plug filtration syringe according to claim 1, it is characterised in that: described is floating Filling in (7) is boss structure, and is provided with blind hole (71) along its axis, is provided on floating plug (7) convex platform side wall and blind hole (71) The fluid hole (72) and inlet opening (73) of connection；It is provided in filter block (8) and the matched floating plug channel of floating plug (7) shape (81), floating plug channel (81) small end is connected to filter chamber, and filter chamber is provided with ring in addition to floating plug channel (81) small end exports Shape filter membrane (9)；The liquid outlet channel (82) of connection filter chamber and floating plug channel (81) big end is additionally provided on filter block (8)；When When floating plug (7) shaft shoulder and floating plug channel (81) are adjacent to, blind hole (71) is connected to by inlet opening (73) with filter chamber, fluid hole (72), liquid outlet channel (82) is in sealing state；When floating plug (7) shaft shoulder and floating plug channel (81) gap setting, blind hole (71) It is connected to by fluid hole (72), liquid outlet channel (82) with filter chamber, inlet opening (73) is in sealing state.

3. a kind of combined type medical fluid precision floating plug filtration syringe according to claim 2, it is characterised in that: described goes out Liquid channel (82) is multiple, and is arranged along filter block (8) axis.

4. a kind of combined type medical fluid precision floating plug filtration syringe according to claim 2, it is characterised in that: described goes out Fluid apertures (72) and inlet opening (73) are circumferentially uniformly distributed along floating plug (7).

5. a kind of combined type medical fluid precision floating plug filtration syringe according to claim 1, it is characterised in that: the mistake Filter end (5) inner cavity and the shape of the piston (4) of injection rod (3) front end match.

6. a kind of combined type medical fluid precision floating plug filtration syringe according to claim 1, it is characterised in that: the ring Shape filter membrane (9) is nuclear pore membrane, poly (ether sulfone) film, polyester film or nylon membrane.

7. a kind of combined type medical fluid precision floating plug filtration syringe according to claim 6, it is characterised in that: the ring Shape filter membrane (9) pore size filter is 1.2~15 microns.

8. a kind of combined type medical fluid precision floating plug filtration syringe according to claim 1, it is characterised in that: the needle Headstock (6) is nipple or quick connector.

9. a kind of combined type medical fluid precision floating plug filtration syringe according to claim 1, it is characterised in that: the note Shooting cylinder (2) front end is threadedly coupled with filter device end (1) or fast insert is tightly connected.