CN2693258Y

CN2693258Y - Combined type dosage/injection needle

Info

Publication number: CN2693258Y
Application number: CN 200420048573
Authority: CN
Inventors: 王希平
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-04-19
Filing date: 2004-04-19
Publication date: 2005-04-20
Anticipated expiration: 2014-04-19

Abstract

The utility model relates to a combined type dosage/injection needle, comprising an outer needle tube, an inner needle tube, a front needle seat, a back needle seat, a cap, a unidirectional valve core or a gas filtering film. The combined type dosage/injection needle is operated easily and safely in dispensing, and the front needle seat is picked off to inject in following injecting operation. The combined type dosage/injection needle simplifies operations and reduces use cost, which has better clinical using value.

Description

Combined type dispensing--entry needle

Technical field:

This patent relates to a kind of making up a prescription--entry needle, can realize making up a prescription and injection operation requirement subsequently safely, easily, or only as making up a prescription.Belong to the medical and health apparatus.

Background technology:

In medical procedure, for transfusion, injection preparating liquid are the most basic medical care precesses, reduce the pollution of the puncture chip particles that bottle stopper caused though developed the side opening pin, but exhausting problem often makes the dosing difficulty, after the bottle stopper that punctures is simultaneously taken out medicine, need make operation inconvenience also increase cost of use with changing syringe needle again during injection.

Summary of the invention:

The present invention discloses a kind of combined type dispensing--entry needle for this reason, can better address the above problem.This combination pin both can be whole as well behaved dispensing needle, and detachable again or order splits makes up a prescription and entry needle usefulness.

A kind of combined type dispensing--entry needle is by outer needle tubing, front needle seat, inner needle tube, compositions such as back needle stand, described outer needle tubing head becomes cone-shaped, it is characterized in that: near head needle tubing sidewall have at least one advance, outage, have another steam vent in position, its underpart, the edge in hole is a rounding off; The front needle seat front portion has the outer needle tubing of preceding Kong Nengyu to cooperate, and is bigger centre bore behind the preceding hole, is 6: 100 Rule internal taper holes of standard behind the centre bore; There is a passage to communicate with block set hole on the front needle seat wall in the centre bore side; Described inner needle tube external diameter is less than outer needle tubing internal diameter, inner needle tube length guarantee assembling finish after the needle tubing head be in into, the outage position; Needle stand front portion, described back is 6: 100 standard Luer Outer Taper, and there is the mating holes that cooperates with inner needle tube at the center, connects 6: 100 Rule internal taper holes of standard behind the mating holes, and back needle stand rear appearance is identical with the standard needle stand.

Described inner needle tube front end is the plane or makes standard puncture inclined-plane.

Be mounted with a nonreturn valve core in described block set hole, its direction is from inside to outside; Described nonreturn valve core is made up of dome-type valve head, cylindrical valve seat.One blind hole is arranged in the middle of valve body, and the blind hole bottom also is dome-type, has a joint-cutting on the dome-type valve head at least, and joint-cutting communicates with central blind hole, and spool is made by rubber or elasticity macromolecular material.

Between the advancing of needle tubing, outage and the steam vent, make a necking down at least outside described, the endoporus of necking down is identical with the external diameter of inner needle tube; At the passage place of front needle seat, be placed with circular filter membrane in the described block set, filter membrane is compressed by the inner cap cover, and the external diameter of inner cap cover is slightly larger than the internal diameter in block set hole, and passage is arranged at the top of inner cap cover.

This combination is made up a prescription as can be seen--and entry needle has more perfect function of use

When 1) bottle stopper being punctured, because perforate is outside on the needle tubing sidewall, and hole portion edge is through the circular arc processing, thereby the smear metal particle contamination can eliminate puncture the time.

2) owing to have inside and outside needle tubing, thereby the Compressed Gas that produces in medicine bottle during dosing can be discharged in the atmosphere through the passage of the steam vent on the outer needle tubing wall, front needle seat, thereby makes dosing no longer because of the big difficulty of resistance.

When 3) extracting medicament and mix, because the uniform mixing that the buffer action of nonreturn valve core or necking down makes extraneous gas can not be drawn into needle tubing influences medicament dissolves.

When 4) from airtight medicine bottle, extracting medicinal liquid,, eliminate, make and extract no longer difficulty of medicinal liquid because of extracting the negative pressure that medicinal liquid forms because the buffer action of outer needle tubing necking down can also make extraneous gas add in the medicine bottle through filter membrane.

5) after drawing liquid finishes, after needle stand takes off from the back together with outer needle tubing with front needle seat, can carry out injection operation, so both guarantee that medicament is not subjected to the smear metal particle contamination, save cost again, simplified operation.

6) as with front needle seat upper vent hole sealing, then front needle seat group (comprising front needle seat, outer needle tubing) also can be separately as simple and easy dispensing needle, satisfies some and requires the low cost usefulness of making up a prescription.

Description of drawings:

A kind of structural representation of Fig. 1 this patent combined type dispensing--entry needle

Fig. 2 nonreturn valve core structural representation

Another embodiment structural representation of Fig. 3 this patent combined type dispensing--entry needle

Fig. 4 Fig. 3 makes up a prescription--entry needle head vertical view

Marginal data

1. outer needle tubing: 11 taper puncturing heads, 12 outer needle tubing outer walls 121 advance, leakage fluid dram

13 outer needle tubing endoporus 14 necking downs of 122 steam vents

2. inner needle tube: 21 standard puncturing heads, 22 inner needle tube outer walls

3. front needle seat: 31 preceding hole 32 centre bores, 33 passages

34 6: 100 taper holes, 35 block sets

4. needle stand after: Outer Taper 42 6 in 416: 100: 100 internal taper holes, 43 mating holes

5. nonreturn valve core: 51 hemispherical valve heads, 52 cylindrical valve seat, 53 blind holes

Hemisphere face 55 extends cylinder 56 joint-cuttings in 54

6. lid overlaps: 6 ' inner cap cover:

7. filter membrane:

8. bonded adhesives:

The specific embodiment:

Fig. 1 is a kind of combined type dispensing--the structural representation of entry needle.As can be seen: the head 11 of the outer needle tubing 1 of the medicine bottle plug that is used to puncture is to make sharp-pointed cone, to reduce puncture force; And advance, outage 121, the edge of steam vent 122 all is processed into rounding off, thereby plug is not had dissection, does not have smear metal and produces.Outer needle tubing 1 is installed in (with bonded adhesives 8 fixing and sealings) in the preceding hole 31 of front needle seat 3.Connecing bigger centre bore 32 behind the preceding hole 31, is thereafter 6: 100 standard Luer internal taper holes.Sidewall at centre bore 32 has passage 33, and block set 35 is arranged outside passage 33, in nonreturn valve core 5 is housed, block set 35 endoporus are slightly less than the external diameter of the cylindrical valve seat 52 of nonreturn valve core 5, so that assembling back forms sealing.Nonreturn valve core 5 can be glued in block set 35, and also available lid cover 6 is fixing with spool 5.Lid cover 6 is one the cylindrical sleeve of stepped hole to be arranged, its big stepped hole can with the cylindrical close-fitting of block set 35, the small stair hole is identical with the head diameter of spool 5, thereby can make spool 5 in being fixed on block set 35 holes.

The head of the nonreturn valve core 5 of imitative heart mitral valve apparatus is hemispherical valve head 51 (one section extension cylinder 55 that diameter is identical also can be arranged), and the bottom is a cylindrical valve seat 52, and its diameter is greater than the diameter of valve head 51.At the spool middle part one blind hole 53 is arranged, the blind hole bottom also is a hemisphere face 54, has a joint-cutting 56 at least at hemispherical valve head 51 middle parts, and joint-cutting 56 communicates (as shown in Figure 2) with blind hole 53.Spool 5 is made by rubber or elasticity macromolecular material.

The external diameter of needle tubing 2 is less than the internal diameter of the endoporus 13 of outer needle tubing 1.Inner needle tube 2 is identical with normal injection puncture needle tubing, and there is standard puncture inclined-plane 21 front portion; For only being used to make up a prescription (as preparation transfusion medicament), then inner needle tube 2 heads are cut flat getting final product, thereby can reduce manufacturing cost.

Back needle stand 4 front portions are 6: 100 standard outer cone joints 41, can with endoporus 34 close-fittings of front needle seat 3; Its center has mating holes 43 inner needle tube 2 can be installed and reinforce with bonded adhesives 8.Connect 6: 100 standard Luer conical bores 42 behind the mating holes 43, can be connected with standard syringe.

Inner needle tube head 21 be in the advancing of outer needle tubing 1, outage 121 places (with the puncture inclined-plane 21 of inner needle tube 2 aim at, outage 121, more help discharge opeing and drawing liquid).Because forward and backward needle stand is to cooperate with 6: 100 standard Luer joints, thereby can reach better seal and bonding strength.

When using this pin to make up a prescription (linking with standard syringe earlier) when inserting in the bottle drawing liquid or medicament, two holes 121 of outer tube 1 and 122 all are immersed in the liquid, the syringe of pulling back, then liquid (medicinal liquid) leads to liquid pass hole 121, inner needle tube 2, back needle stand 4 enters in the syringe, this moment is because nonreturn valve core 5 endoporus are negative pressure, thereby the joint-cutting 56 of spool 5 is closed, be that air can not pass through passage 33, centre bore 32, needle tubing 1 endoporus 13 enters in the ampoule, thereby can not make gas enter into inner needle tube 2, and make the excessive bubble of the unlikely suction of syringe and have influence on the miscible of medicine powder.

When with the medicament in the syringe when inner needle tube 2---inlet opening 121 is injected in the medicine bottle, will cause increasing of bottle interior gas pressure, the air pressure that increases will make the joint-cutting 56 of spool 5 open, then the unnecessary gas needle tubing 1 endoporus 13---centre bore 32---passage 33---nonreturn valve core 5 outside steam vent 122---in the bottle enters atmosphere, thereby it is constant substantially to keep bottle interior gas pressure, then make syringe to inject resistance also constant substantially.When adding amount was big, this effect was fairly obvious.

In the time need from the bottle of band rubber stopper, extracting medicinal liquid and inject, earlier pass the plug drawing liquid with this combination pin, before injecting, take out front needle seat 3 (and outer needle tubing 1), then stay on the syringe is back needle stand 4 and inner needle tube 2, and this makes up standard puncture needle just, can carry out conventional puncture injection operation.Obviously use this patent combined type dispensing--entry needle has not only been simplified injection operation, owing to do not need to change in addition pin, thereby reduced use cost.

Fig. 3 is another embodiment of the present utility model: be characterized in making a necking down 14 at least between the advancing of needle tubing 1 outside, outage 121 and the steam vent 122, its endoporus is identical with the external diameter of inner needle tube 2; Place filter membrane 7 in the block set 35 of front needle seat 3, filter membrane 7 is by inner cap cover 6 ' compress, inner cap cover 6 ' external diameter be slightly larger than the internal diameter of block set 35, inner cap cover 6 ' the top passage is arranged.Because necking down 14 endoporus of outer needle tubing 1 are identical with the external diameter of inner needle tube 2, thereby after the assembling, necking down 14 is about to into, outage 121 is isolated with steam vent 122.(obviously, then isolating more reliable) as adopting a plurality of necking downs.Like this when with this combination pin in the liquid bottle during dosing, medicinal liquid from inner needle tube 2 front ends 21 through outside the advancing of needle tubing 1, outage 121 enter the bottle, because liquid measure increases in the bottle, will inevitably cause that air pressure increases in the bottle, unnecessary gas will be outside steam vent 122---needle tubing 1 endoporus 13---centre bore 32---passage 33---filter membrane 7---lid cover 6 ' and enter atmosphere, thereby make pressure of the inside of a bottle constant, promptly can not cause and in bottle, add the medicinal liquid difficulty.

During drawing liquid, because this combination the advancing of pin, outage 121 are isolated with steam vent 122 necking 14, thereby do not have outside the passage 33---of air on front needle seat 3 and enter pin hole 2 in the interporal lacuna in the needle tubing 1, and make syringe be full of bubble, influence the mixing of powder.When being taken out in the bottle when forming negative pressure, extraneous air is through inner cap cover 6 '-steam vent 122 enters in the bottle--needle tubing 1 endoporus outside the gas filtration film 7---passage 33-----, the medicinal liquid space that additional quilt is taken out, make and do not occur negative pressure in the medicinal liquid bottle all the time, thereby can not bring the drawing liquid difficulty, because the gas that enters filters through filter membrane 7, so can not cause drug contamination.

Same drawing liquid finishes, inject as need, then can pluck front needle seat 3 and attached thereon needle tubing 1, filter membrane 7 and inner cap cover 6 ' (though necking down 14 internal diameters on the needle tubing 1 are identical with inner needle tube 2 external diameters, but because the needle tubing surface is very smooth, so the unlikely needle tubing 1 that has influence on takes off from inner needle tube 2) stay this moment on the syringe nozzle only be back needle stand 4 and in puncture needle tubing 2, because puncture needle tubing and standard puncture needle tubing are identical, thereby can inject.

As can be seen: this patent combination type dosing-entry needle not only can satisfy the various requirement of the use of medicine preparation well, and can continue to use as entry needle in the back partition of making up a prescription, thereby has simplified injection operation subsequently, also reduces cost of use,

In sum: this patent combination type dosing-entry needle uses flexible, convenient, and use value is more widely arranged clinically.

Claims

1. a combined type dispensing--entry needle is made up of outer needle tubing, front needle seat, inner needle tube, back needle stand etc., described outer needle tubing head becomes cone-shaped, it is characterized in that: near head needle tubing sidewall have at least one advance, outage, have another steam vent in position, its underpart, the edge in hole is a rounding off; The front needle seat front portion has the outer needle tubing of preceding Kong Nengyu to cooperate, and connects bigger centre bore behind the preceding hole, is 6: 100 Rule internal taper holes of standard behind the centre bore; There is a passage to communicate with block set hole on the front needle seat wall in the centre bore side; Described inner needle tube external diameter is less than outer needle tubing internal diameter, inner needle tube length guarantee assembling finish after the needle tubing head be in into, the outage position; Needle stand front portion, described back is 6; 100 standard Luer Outer Taper, there is the mating holes that cooperates with inner needle tube at the center, connects 6: 100 Rule internal taper holes of standard behind the mating holes, and back needle stand rear appearance is identical with the standard needle stand.

2. combined type dispensing according to claim 1--entry needle is characterized in that: described inner needle tube front end is the plane or makes standard puncture inclined-plane.

3. combined type dispensing according to claim 1 and 2--entry needle is characterized in that: be mounted with a nonreturn valve core in described block set hole, its direction is from inside to outside.

4. combined type dispensing according to claim 3--entry needle, it is characterized in that: described nonreturn valve core is made up of dome-type valve head, cylindrical valve seat, and a blind hole is arranged in the middle of valve core, and the blind hole bottom also is dome-type, have a joint-cutting on the dome-type valve head at least, joint-cutting communicates with central blind hole; Spool is made by rubber or elasticity macromolecular material.

5. combined type dispensing according to claim 1 and 2--entry needle is characterized in that: between the advancing of needle tubing, outage and the steam vent, make a necking down at least outside, the internal diameter of necking down is identical with the external diameter of inner needle tube.

6. combined type dispensing according to claim 1 and 2--entry needle, it is characterized in that: at the passage place of front needle seat, be placed with circular filter membrane in the described block set, filter membrane is compressed by the inner cap cover, the external diameter of inner cap cover is slightly larger than the internal diameter in block set hole, and passage is arranged at the top of inner cap cover.

7. combined type dispensing according to claim 5--entry needle, it is characterized in that: at the passage place of front needle seat, be placed with circular filter membrane in the described block set, filter membrane is compressed by the inner cap cover, the external diameter of inner cap cover is slightly larger than the internal diameter in block set hole, and passage is arranged at the top of inner cap cover.