Background of invention
The subject matter that becomes basis of the present invention relate to how to dispose, store and take must with the pharmaceutical composition of another kind of reagent mix, and this reagent may play page influence to the stability of said composition, and how both is made and be suitable for the particularly preparation taken of livestock of being (living being).
Animal doctor circle knows, the drug combination preparation of feeding the drink pasty state to horse is that the device with syringe-like carries out.Be discharged on the root of the tongue syringe insertion Ma Zui and preparation when the time comes.The thickness character of transferring and be put into the Ma Zui rear portion horse is felt bad and the medicament that spues.
In some cases, such preparation, for example pharmaceutical composition and denseness form the mixture of agent, have only the storage stability of very short time.Therefore, two kinds of components in this preparation must be isolated mutually before taking and be preserved, up to just they being mixed into the preparation of requirement mutually from taking very short time.
Existing a lot of ways can solve the problem that the sort of component stored and be mixed into the preparation that can not store up for a long time.
Prevailing existing solution is the syringe of US-A-3 340 873 disclosed the sort of types, and it has columniform syringe body, in the plunger of a slip is arranged.Two kinds of mutual isolation of components to be mixed are placed in two subregions that separate with film.From taking preparation during very short time, film is torn or pokes, so that two subregions communicate.Rock then mixture is housed syringe to form uniform preparation, uncap open wireless tunnel is after this discharged content by the pushing plunger by needle tubing.
This prior art proves satisfied and reliably as a rule, and can be for example with the plastic injected die method easily, produce at an easy rate.
But this syringe is unsuitable for taking gel, mainly is because have needle tubing.In addition, a bit be to have two mixing arrangements usually can not be used for the pharmaceutical composition of some kind in addition to water vapor sensitive with the subregion of rubber or plastic sheeting isolation.An example of this based composition contains the composition of proton pump inhibitor (proton pump inhibitor) exactly, and as Omeprazole (Omeprazole), it exists under the situation of steam if long term storage will be degraded.The molecular migration phenomenon of passing through rubber or plastic sheeting that can exist usually in long term storage just is enough to cause the degraded of this class sensing composition.
Therefore, two traditional subregion mixing arrangements are inapplicable to this based composition.
Danish Patent specification 112893 (submission on July 25th, 1996) discloses a kind of syringe that is used for injectable pharmaceutical compositions, and this composition can not be stored in for a long time in the solution and illeffects does not take place.This syringe is equivalent to standard syringe basically, and the main distinction is that the hole of adorning needle tubing sealing with film.Composition is contained in the syringe with dry state.Be contained on the needle tubing hole with the double end entry needle, in the time will using syringe, just poke film for one of pin.Solvent is just by in the needle tubing inhalation syringe.Rock syringe then, the solution for preparing is injected away by needle tubing again.
The shortcoming of such syringe is, fills the operation more complicated, and it need load onto two injection needle tubing so that poke film.In addition, after film breaks, mixing chamber will be opened air, therefore when rocking carefully mixture spill by needle tubing.Moreover, since syringe particularly the passage of needle tubing is narrow, flow resistance is big, so it be not suitable for viscosity, pasty state or gelatinous preparation.What is more, and this apparatus is unsuitable for using as drug oral because needle tubing is arranged.In addition, the production cost of this syringe is also than higher.
As shown in Figure 1, the device of the syringe-like of the present invention's first preferred embodiment includes theducted body 2 of a tubulose elongated cylindrical, and all open at its two ends.Lower end among Fig. 1 is an outlet side 4.Plunger 6 inserts by theupper end 10 of opening.A flange orhandgrip part 13 are arranged around the upper end, it basically with vertically the stretching perpendicularly of ducted body 2.Outlet side 4 is airtight by 12 on a removable lid, and fluted 14 on the lid, the diameter of groove is equivalent to the diameter of thesidewall 8 of ducted body 2.Groove 14 is made certain depth, so that have bubble-tight sealing between the inner chamber of cylinder lower end 4 and ducted body 2.Lid 12 has thelug 16 of circumferentially extending, so that take offlid 12 easily when discharging preparation.
Can be clear that from Fig. 2plunger 6 comprises 18 and 20 two parts: the rest facility 18 of panels of plane shape and thin and resilient disc-shaped seal 20; The rest facility stretches in diametric(al), and with the axis normal ofducted body 2, seal size of (when not adding external force) when loosening is done to such an extent that can contact with inwall 8 sealings of ductedbody 2, thereby the space onseal 20 both sides is kept apart mutually.Connector 22 is equipped with at the center ofdish 20, and a compressible cydariform end 24 is arranged at connector top, and the centre bore 26 of its diameter less than cydariform end 24 then arranged on the support plate 18.The handle 28 ofconnector 22 is suitable with the thickness of support plate 18, so thatconnector 22 can be pressed in thecentre bore 26, thereby makesdish 20 be close to support plate 18.
Plunger 6 is made an integral body with plunger 30.The overall diameter of plunger is slightly smaller than the interior diameter of ductedbody 2, so thatplunger 30 can slide in ducted body.Plunger 30 is tubular, and itsannular end 32 and support plate 18 are made of one, and the end face ofend 32 flushes with the end face (lower surface among Fig. 1) of support plate 18.Thehandgrip 23 of circumferentially extending is housed on theopening end 40 ofplunger 30.
Resilient disc 20 usefulness elastomeric materials are made, and it can tilt when being subjected to enough big external force, and it can return to original state when removing external force.Whenlid 12 or other end socket covered outlet side 4, just the inwall bylid 12 or other end socket,resilient disc 20 and ductedbody 20 surrounded anairtight tube chamber 38, becauseplunger 6 can move axially, so the volume of tube chamber is variable.Afterresilient disc 20 was pressedcentre bore 26, it just pushed against the annular end of support plate 18 and plunger 30.Therefore the annular limit portion 34 ofresilient disc 20 is just withstood and can not be bent upwards by support plate 18 and annular end 32.But limit portion 34 is can be reclinate.When being bent downwardly, limit portion 34 will crack it open and contact with the sealing of theinwall 8 of ductedbody 2, thereby is leaving a passage betweenresilient disc 20 upper and lower surfaces on the inwall 8.Like this, the effect ofresilient disc 20 resembles a check (non-return) valve.
Must be pointed out that available any method is assembled toresilient disc 20 on the plunger 30.For example available keyhole joint.At this moment, just can do the hole that can clamp key in the end ofplunger 30, then, the connector ofseal disc 20 just is admitted in the hole of broad of keyhole, is pushed into subsequently in the slit of keyhole.Another kind of assembly method is, can do a handle at the center ofresilient disc 20, and handle imports in the hole ofplunger 30 lower ends then, and the end of handle is heated to softening temperature then, flattens on the hole, forms the joint of similar riveted joint.
As mentioned above, can find out also thatplunger 30 is tubular and the bottom is open from Fig. 1-3, the bottom normally seals with resilient disc 20.Theinner chamber 36 of plunger anddish 20 are formed a filled chamber, in order to deposit the liquor that will mix mutually with the composition deposited in the tube chamber.
This function of installing first embodiment below will illustrate with embodiment.This device suitable compositions is described in WO/SE94/25070.In following example, pharmaceutical composition is the globule by active material, the cellulose derivative of for example enteric-coated Omeprazole (Omeprazole) ball and gelling agent such as synthesising biological polymeric gel, guar gum, locust bean gum, gum tragacanth, improvement etc. mixes, later also in the mixture of this dried component, add liquor, Ru Shui, so that form the gelinite of viscosity.Use the defined device of the present invention will be not limited to the use relevant with Omeprazole.
The mixture of enteric-coated Omeprazole ball and gelling agent is placed in thetube chamber 38 with appropriate dosage.Can add buffer or pH conditioning agent such as lemon carboxylic selectively, in case enteric-coated globule dissolves prematurely add water later in composition after.The available two kinds of ways of this operation are carried out, a kind of is thatplunger 6 is placed on the appropriate location in the ductedbody 2, andlid 12 is taken off, and puts medicine inward by lower end 4 then, a kind of is thatlid 12 covers on lower end 4 andplunger 6 is taken out, and puts medicine inward by thehole 10 on top then.The quantity of mixture or volume can be chosen wantonly in certain limit, becauseplunger 6 can move vertically, so the volume oftube chamber 36 is variable.4cover lids 12 or other end socket in the end respectively after pharmaceutical composition is put well perhaps insertducted bodies 2 to plunger 6.
Should be pointed out that under favo(u)red state, should the bear the responsibility task of the metering device that will join the liquor that goes in thetube chamber 38 of hollow plunger 30.It should be transparent and preferably be decorated with graduation mark, makes the liquor that will add accurately measure with this device.Unnecessary liquor can be poured out inplunger 30 before plunger 30 moves and open the path that enters tube chamber 38.Like this,, therefore need not any optional equipment, depend merely on syringe itself, just can measure very accurately the liquor that will add owing to the special design ofplunger 20 has had measurement means.
Hygroscopicity and the viewpoint that requires for up to the several years from gelling agent; concerning pharmaceutical composition; must protect when being stored in the tube chamber and not be subjected to water vapor permeable, otherwise steam will gather in gelling agent, in long term storage or early or can cause the degraded of Omeprazole late.Therefore, after putting into medicine, this device should be enclosed in the packaging container of waterproof vapour, preferably has the water blocking layer of aluminum, but other material that can satisfy same purpose also it is contemplated that certainly.Enclose drier in packaging container, preferably with being contained in the pouch, it is suitable being used for further waterproof.If need not above-mentionedly pack, add air-locked end socket or the capping of making of similar material at the top of theopening end 40 ofplunger 30, also just can meet the demands.At this moment can in end socket or capping, add drier, to absorb the moisture that any infiltration is come in.Like this, but this device just stored for years up to use.
When using, take out or take off the end socket attubular plunger 30 tops with installing in the packing of vapor pervious never.To be added to an amount of water that the mixtures in thetube chamber 38 go toward the interior injection of the tubular cavity ofplunger 30 then, be added to the height (indicating) of requirement with scale orheight graticule.Plunger 6 up moves then, therefore causes vacuum in tube chamber 38.In displacement after enough distances, vacuum wherein is just by force to making the downward-sloping degree ofresilient disc 20, the circumferential edges 34 ofresilient disc 20 just cracks it open and contacts with the sealing ofinwall 8, so just opened the passage that enterstube chamber 38, therefore existed thecavity 36 interior water ofplunger 30 will be inhaled intotube chamber 38 from cavity 36.After water was carried in the past,resilient disc 20 will be returned to its poised state, after this can rock this device, contains till the viscogel that the Omeprazole ball is arranged up to formation.When rocking,resilient disc 20 can prevent themixture cavity 36 that bleeds.Mixture can only store very short time in device before taking.Lid 12 is taken off facing when taking, handle assembly is put into the place that will take preparation.Just pushplunger 30 then and discharge preparation.
The axial length ofplunger 30 is a most convenient can all preparations all be discharged from device after all compressing into.Resilient disc 20 preferably has even curface so that all discharge composition, thereby avoid any residue, pill or gel stay in the hole or seam in, as the slit is arranged on the fruit tray, just this thing may take place.
The end socket that available energy tears off or staves replacesvinyl cover 12 toseal tube chamber 38.
The slight variations of the embodiment of Fig. 4 exploded view 1-3.The bottom of itstubular plunger 30a is not to open, but two relative longitudinally cuttinggrooves 42 are arranged, it extend to from the bottom ofplunger 30a plunger 30a height pact half, thereby the inner chamber 36a ofplunger 30a is communicated with the top edge of resilient disc 20a.Include a hole 26a in bottom centre, the effect in this hole is similar to thehole 26 in the embodiment of Fig. 1.The bottom ofplunger 30 is circular, and it is supporting the middle part ofresilient disc 20a.
Another change of embodiment is among Fig. 4, and seal 20 ' a and plunger 30 ' a are made of one, and seal 20 ' a is that an annular resilient collar constitutes, and sees Fig. 7.The advantage of this embodiment is to only require once-through operation when making plunger 30 ' a and seal 20 ' a.
Another change of previous embodiments (Fig. 8-10) is, the top ofplunger 30b is tubulose, and itsunderpart 46 has one section to be criss-cross, and this can be clear that from Fig. 9.Therefore, mutually perpendicular plate 48,50 constitutes by two extending longitudinallies in the bottom, they extend to from the bottom ofplunger plunger 30b height pact half.Extendcross section 46 downwards fromtubular segments 44, it comprises the first with constant section, provide enough rigidity and the guide effect that props up inwall 8 with it, 56 of next parts are tapered towards the bottom downwards, this part itself also comprisesannular lip 60, in order to supportelastic dish 20b, and prevent its upward.The bottom also comprises ahole 62, and the cydariform end 24b ofresilient disc 20b just presses (see figure 10) in this hole.
A modification of Fig. 8-10 embodiment is shown in Figure 11.Also in Fig. 7, elastic sealing element 34 ' b andplunger 30b are made of one, it have theannular lip 60 of circumferentially extending ', flange then contacts with inwall 8 sealings ofducted body 2 with the thin elastic edge 34 ' b lengthening of a circle, elastic edge.
In the embodiment of Fig. 8-11, the water that add still like before the opening end byplunger 30b 40 inject, but different with previous embodiments be that water is not to exist in the lower tubular part of plunger, but rises to certain height along the cross section.In this scheme, cross Duan Shangying draws multi-color cord to indicate the volume level.In this embodiment, plunger must be opaque, and can make suitable color.
Should be appreciated that the mechanism of action of all these embodiments all is similar.A kind of liquor, preferably water is injected into theupper end 40 ofplunger 30, flows down the upper surface that arrives elastic sealing element along pore then.Seal stops water to enter tube chamber 38.Plunger is moved backward then, thereby causes vacuum in tube chamber 38.The synergy meeting of the weight of water and vacuum makes the downward deflection of seal, and like this, water just is inhaled into tube chamber 38.When water entered tube chamber from the disappearance of elastic sealing element top, the sealing part can return its original poised state, andtube chamber 38 is sealed.
Above-mentioned solution provides different advantages.If seal is a constitutional detail separately, just in the selection of material, provide great freedom.The material of seal may be selected to be has optimal seal and elastic performance, and the material of plunger may be selected to be and can provide enough rigidity and to the support force of seal.If plunger and seal are made of one, the selection of material must take into account the desired rigidity of plunger and needed elasticity of seal and flexibility so.But this a kind of solution in back has advantage aspect production cost.
Should further point out, in these two kinds of embodiments, all parts all can be made of polymeric material, and for example available polyethylene, polypropylene, polyester, synthetic rubber, Merlon, rubber or silicone etc. are also made with traditional inexpensive method such as injection molding.Moreover, the structure of all parts all very simple and be easy to the assembling.Consequently, this device can be produced with low cost.
In above-mentioned all embodiments of the present invention,lid 12 is provided with a radially-protrudinglug 16, and it extends on a part of circumference oflid 12, forms the part of a handgrip, so that take off lid.Will be appreciated that the handgrip part can be made any suitable shape.For example, can be avette, also can be by constituting along all peripheral flange that stretches of lid.
This device is particularly suitable for using to animal, particularly horse combination of oral medication, particularly contains the prescription of proton pump inhibitor such as the water of Omeprazole and becomes gel or similar compositions.But, it will be apparent to those skilled in the art that, this device is not limited to use in this field because it can be used to mix multiple pharmaceutical composition and other liquor, and can give different types of live body, comprise the people do oral, rectum with or any other suitable application method use.
Be also pointed out that pharmaceutical composition one speech, say on the meaning of this utilization that do not mean medicine merely, it also comprises useful preparation, for example essential nutrients just can be encompassed within this word.