WO1995032015A1

WO1995032015A1 - Device for the preparation of a solution, a suspension or an emulsion of a medicinal substance

Info

Publication number: WO1995032015A1
Application number: PCT/CH1994/000097
Authority: WO
Inventors: Gabriel Meyer
Original assignee: Gabriel Meyer
Priority date: 1994-05-25
Filing date: 1994-05-25
Publication date: 1995-11-30
Also published as: NO960286D0; AU6643994A; FI960320A0; CZ31996A3; KR960704591A; FI960320A; NO960286L; SK22896A3

Abstract

The invention relates to a device for the preparation of a medicinal solution from two compounds, one of which is in the form of a powder, a lyophilisate or a liquid and the other one is a diluent or a liquid solvent. These compounds are respectively stored in a distal closed container (11) and a proximal container (13), each having an opening sealed by an obturator-piston-valve, which isaxially movable. The two obturators-pistons-valves (19, 24) are connected by a transfer rod (15) arranged to provide for a rigid, sealed and sterile couplind link between the two obturators-pistons-valves (19, 24) when the device (10) is in a storage position, and to define a liquid-tight and sterile communication channel between the two containers (11, 13) when the device is in a utilisation position. The obturators-pistons-valves (19, 24) have a central area provided with a slot (31, 33) which is highly compressed and sealingly closed when the device is in a storage position, and opened when an extremity of the transfer rod (15) is inserted therein, the device being then in the utilisation position.

Description

DEVICE FOR PREPARING A SOLUTION, A SUSPENSION OR AN EMULSION OF A MEDICINAL SUBSTANCE

The present invention relates to a device for the preparation of a solution, a suspension or an emulsion of an active medicinal substance, from at least two components, at least one of which is in the liquid state. .

The reconstitution before use of a medicament from one or more components stored in the same hermetically closed assembly and intended to be mixed in this assembly, without the introduction of external elements, poses multiple problems. A large number of two-component bottles have been developed for this purpose. These bottles generally comprise a single container separated into two compartments by a movable closure member. The two compartments are hermetically closed during storage. Before using the reconstituted drug, a system activation step makes it possible to mix the substances, at least one of which is in the liquid state. For this purpose the movable closure member which separates the two compartments is pushed so as to penetrate into an enlarged zone, or provided with a bypass, allowing the flow of the liquid or solvent towards the other component which can be liquid, solid, pasty, etc. .

The manufacture of these double containers is not always easy and does not always meet the needs of the pharmaceutical industry for a particular application. A two-component syringe of the aforementioned type has been the subject of US Patent No. ² / »014. 330 which describes a two-component syringe contained respectively in two compartments closed by two obturators also having a piston function. This device is built in two elements which must be assembled before use. The placement of the bottle, which defines the distal compartment, must correspond with the activation of the system. Reconstitution and transfer cannot be done in a closed environment, hence significant risks of contamination of nursing staff by the product, and loss of sterility of the mixture. In addition, the active product is contained in the proximal container open at both ends and fitted with fins. This poses in particular production problems when packaging a lyophilisate, a powder or a liquid.

Indeed, it is imperative to package these active products in a cylindrical flask with a flat bottom sealed with a flame in order to meet the specific requirements for packaging these substances with equipment known per se, during vacuum preparation (washing, siliconization, fixing the silicone film, depyrogenization and sterilization of said bottle), filling it (liquid, powder, lyophilisate), closing it (capping) and transferring it to an assembly unit with the component comprising the compartment containing the diluent.

The system as described in US Pat. No. 4,014,330 cannot meet these requirements, since the active product should be packaged in the distal container and, under these conditions, due to its construction, the reconstitution is no longer possible. .

One of the problems which particularly arises, and which can only be difficult to solve by systems where the components are contained in a single container with two compartments, is that of the individual packaging of the two components. In other words, the conditions of preparation and sterilization of one of the components are not necessarily those which are suitable for the preparation of the other. A solvent cannot be treated in the same way as a lyophilisate or certain powders. The lyophilisate does not withstand the heat necessary to sterilize a solvent by autoclaving. In a single container, the lyophilisate is separated from the solvent by a mobile elastomeric shutter. The solvent is in permanent contact with this mobile shutter, so that the partial vapor pressure is constantly at its maximum. The risk of vapor penetration through this mobile shutter is great and the shelf life of the lyophilisate can be compromised or limited in time. Consequently, the choice of elastomers is limited to that with the highest waterproof barrier capacity. This last constraint requires the establishment in real time of evidence stability and compatibility which is very expensive and time consuming and handicaps pharmaceutical companies when they have to make a decision relating to the packaging of their products in two-chamber systems.

In addition to these drawbacks, there is the increased risk of losing the sterility of the container due to the humid environment. Under conditions of monocompact packaging, a dry product, otherwise not autoclavable, is less likely to allow the germs to grow if it is in a dry environment. This absence of risk disappears from the moment when, in the same container, a liquid is packaged. The addition of preservatives is not desired, and even prohibited in certain cases, in particular for single-use products.

Multipurpose products, in successive doses, are packaged with preservatives, not to limit the growth of germs during storage, but to maintain the sterile state after reconstitution throughout the period of use which can last several days .

Another problem which arises and which can only be difficult to solve by existing systems is the control of the flow rate during the reconstitution of the mixture without external action by a screwing process as described in European patent N ² 0 298 067 Bl .

The present invention proposes to overcome these drawbacks by providing a simple and effective device in which the risks of contamination of one of the components by the other are eliminated, in which the basic components necessary for the preparation of a treatment mixture may be subjected to separate operations for their preparation and packaging, and in which the rate of reconstitution is controlled in a tight and sterile environment without external action.

This object is achieved by the device of the invention as defined by claim 1. In an advantageous embodiment, the device can comprise a sleeve in which is housed the proximal container and at least partially the distal container.

This sleeve can be combined with a push cap and a dosing mechanism for the application of multiple doses.

According to another embodiment, said sleeve can be made in one piece by molding with the proximal container.

Depending on the application for which the device is intended, said sleeve is provided with a nozzle constituting an eye drop applicator or a nasal sprayer, integrated into the proximal container.

In the preferred embodiment, said sleeve consists of a first tubular element and a second tubular element which can be fitted into one another, the first tubular element containing said proximal container and said second secondary element containing said distal container .

Preferably, said first tubular element comprises notches and said second tubular element comprises at least two tongues arranged to cooperate with said notches.

Said valve-piston shutters of the device according to the invention each comprise a central recess and said transfer rod comprises leakproof and sterile coupling means with said valve-piston shutters.

Advantageously, said transfer rod comprises stop stops arranged to bear against the facing surfaces of the corresponding valve stoppers-pistons when the device is in the position of use. When the device is in the storage position, said valve shutters-pistons are arranged to ensure a sealed and sterile closure of the corresponding containers, by pressing against the interior walls of these containers, so that these containers can be stored and treated independently. .

In all embodiments, said transfer rod is arranged to ensure rigid, sealed and sterile coupling of said obturators-piston-valves made integral with said distal and proximal containers.

In the device according to the invention, said proximal container is arranged to be able to receive various tips and applicators according to the intended therapeutic uses.

The present invention will be better understood with reference to the description of preferred embodiments and to the accompanying drawings in which:

FIGS. 1 to 4 show an advantageous embodiment of the device according to the invention successively during the storage, activation and use phases,

FIG. 5 illustrates a particular embodiment of the device intended for use as a dispenser for ophthalmic drops,

FIGS. 6 to 9 show another embodiment of the device of the invention successively during storage, activation, at the start and at the end of use,

FIGS. 10 to 13 represent a variant constituting an improvement of the device as represented by FIGS. 1 to,

FIGS. 14 to 18 illustrate another embodiment of the device used as a syringe associated with a dosing mechanism for the application of multiple doses, FIGS. 19 to 22 illustrate the device according to the invention adapted to the ophthalmic field,

FIGS. 23 and 24 represent enlarged views of the plugs-pistons-valves in the rest position,

FIGS. 25 and 26 represent enlarged views of the plugs-pistons-valves in the activation and use position,

FIGS. 27 to 30 show enlarged views of accessories adaptable to the device according to the intended uses, and

Figures 31 to 62 schematically represent the different phases of preparation and assembly of the components of the device according to the invention in the different uses of this device and with the different basic components corresponding to these uses.

Figures 1 to 4 show an advantageous embodiment of the device 10 for carrying out the preparation of a medicinal solution, for example an injectable solution, from two basic components. In particular, Figure 1 shows this device during the storage phase. It comprises a first container 11 in which a lyophilisate 12 is stored, a second container 13 in this case containing a solvent 14, and a transfer rod 15 provided with a hollow conduit 16. The container 11, hereinafter called the distal container , has a closed bottom 17 and an open end 18 through which a shutter-piston-valve 19 has been engaged which delimits, inside the distal container, a chamber 20 containing the lyophilisate 12. It will be noted that this lyophilisate 12 can be replaced by another active substance such as for example a liquid, powder or a pasty substance of greater or lesser viscosity. The container 13, hereinafter called the proximal container, is open at its two ends. In the example shown, the open end 21 is closed by a capsule 22 fixed by crimping. This capsule, known per se, is used on many vials containing medicinal substances and can be produced in the form of a plastic compound ensuring sealing and of aluminum ensuring mechanical resistance and forming an antiseptic barrier. ^• The other open end 23 of container 13 is closed by a stopper-piston-valve 24. The two stopper-piston-valves 19 and 24 are each provided with a central recess 25- respectively 26 in which are engaged the two end pieces respectively 27 and 28 integral with the transfer rod 15. The obturator-piston-valve 24 defines with the walls of the container 13 and the capsule 22 a chamber 29 containing the solvent 14. Depending on the drug substance contained in the chamber 20 of the distal container 11, the solvent 14 can be replaced by a diluent. Whatever the nature of the active substance of the distal container, the substance housed in the proximal container is always in the liquid state and is intended to produce with the treatment substance a solution, a suspension or an emulsion reconstituted from two basic components and intended to be used subsequently in the context of a therapeutic treatment in an injectable form, administered externally or internally by any applicators, in particular a needle, a trocar, a drop dispenser, a sprayer, etc. .

The shutter-piston-valve 24 comprises, in the extension of the central recess 26, a small clearance 30 in which is engaged the anterior end of the transfer rod 15. In the extension of this clearance 30, the shutter -piston-valve has a precut slot 31 which precisely allows this member to play the role of valve closed during storage and open during other phases, that is to say during activation and use. The elastomeric walls of the valve-piston-valve

24, which surround the lips of the slits 31, are thick, and this slit is provided in an area ensuring high compression of said lips of this slit when the obturator-piston-valve is in compression inside the proximal container of in such a way that the filling during storage is carried out in a perfectly effective in ensuring both the tightness and sterility of the chamber and the contents of the proximal container.

Similarly, the shutter-piston-valve 19 has a central clearance 32 in which is engaged the other end of the transfer rod 15. In the extension of this clearance, the shutter-piston-valve has a slot 33 which performs the function of valve closed during storage and open during the other phases of operation of the system, that is to say activation and use. Again, the thickness of the material which surrounds the lips of the slot 33, precut, is sufficient when the obturator-piston-valve is in place inside the distal container to ensure a relatively large compression of said lips to guarantee both the tightness and the sterility of the chamber 20 of the distal container 11.

In the embodiment shown, the inside diameter of the distal container is substantially equal to the outside diameter of the proximal container so that they can be fitted, at least partially into one another, at the time of use. For obvious reasons of simplicity of manufacture and cost of production, the two containers have a generally elongated cylindrical shape with circular section. Due to the differences in diameter of the two containers, the valve plug-piston 19 has a larger diameter than that of valve plug-valve 24. At the time of activation, the first phase of which is shown in the figure 2, initiated by the exercise of a pressure exerted axially, preferably on the bottom 17 of the distal container, the proximal container being held in position, the ends of the transfer rod engage respectively in the slots 31 and 33 of the obturators-piston-valves 24 and 19, which has the effect of putting the chambers 20 and 29 in communication and authorizing the flow of the solvent 14 through the conduit 16 into the chamber 20 containing the lyophilisate 12. The diameter and the length of the conduit 16 are dimensioned so that a controlled flow is obtained during the flow of the solvent 14 through this conduit 16. It will be noted in passing that the ends of the transfer rod are not constituted by bevels being given that their function does not consist in piercing a membrane, but by a planar section arranged along planes perpendicular to the axis of the transfer rod, and possibly extended by a weakly frustoconical zone. This geometry allows easy introduction into the slots in a sealed and sterile manner, the end being intended to spread the lips of these slots to open the valve of the valve-piston-valve, unlike many known systems where a rod transfer has a beveled end whose function is to perforate a membrane. The seal between the membrane and the beveled end can only be ensured if the thickness of the membrane is significantly greater than the length of the bevel, which is incompatible with a compact construction and with the ease of perforating this membrane. Furthermore, it will also be noted that the transfer rod is provided with a first stop 34 and a second stop 35 which are, except during storage, respectively in abutment against the opposite faces of the obturators-pistons-valves 24 and 19 The purpose of these stops is to define precisely the degree of penetration of the ends of the transfer rod into the corresponding chambers of the proximal and distal containers.

When the user continues to press the bottom 17, all the solvent contained in the proximal container 13 flows into the chamber 20, comes into contact with the lyophilisate 12 to form a 12 + 14 solution which constitutes the reconstituted medicinal substance.

By the play of pressures and surface differences between the two obturators-piston-valves, the obturator-piston-valve 24 is housed at the front end of the proximal container 13 and the obturator-piston-valve 19 is placed in a position such that it becomes possible to ensure degassing, the bottle having been fitted with an appropriate tip according to the intended use for the medicinal solution. If this solution is intended for injection, the tip will be a needle. If this solution is intended to be transferred to a transfusion bag, the tip may be a trocar. If the solution is intended for another use, the tip will be chosen accordingly. Whatever the tip, the solution is transferred through the pipe 16. For this purpose, the user presses on the bottom of the distal container 11 which fits onto the proximal container 13. The obturator-piston-valve 19 progressively sinks inside the distal container 11 until it touches the bottom 17. To prevent re-use of the device , in particular in the case where it is used as a syringe, the means for coupling the tips

27 and 28 of the transfer rod 15 respectively with the valve plugs 19 and 24, are sufficiently weak so that they disengage from said valve plugs when a user attempts to remove the proximal container from the distal container , thus making any re-aspiration of a liquid impossible inside the device.

FIG. 5 represents the device according to the invention adapted for application to ophthalmic treatments. In this case, the two containers, respectively distal and proximal, 11 and 13 are pre¬ fitted. The distal container 11, which contains a lyophilisate 12, is completely empty of air, the shutter-piston-valve 19 being engaged inside said container, pressing tightly against the material it contains. The advantage of this embodiment is that it makes it possible to totally eliminate any purging or bubble removal operation and to avoid oxidation of the mixture after its reconstitution, that is to say at the time of activation of the device.

The proximal container 13 which, it should be remembered, is open at its two ends, is closed at one of its ends by the obturator-piston-valve 24 and at its other end by a plug 50. A capsule 51 covers this plug and a filter 52 and a silver disc having an oligodynamic function are interposed between this capsule and this stopper. The silver tablet may be replaced by another material such as, for example, silver oxide or a compound containing substances having similar properties. A protective cap 53 closes this assembly. A tip 54 with a spiral cannula 55, equips the end of the capsule 51. In this case, the transfer rod 15 is advantageously made up of a rigid plastic element molded in one piece. It will be noted that the plug 50 has a geometry which is substantially identical to that of the shutter-piston-valve 24 and that it operates on the same principles, at least as regards its central opening which makes it a valve consisting of a precut slot intended to be opened by the end of the transfer rod, in the phase of use of the device. Also in this embodiment, the capsule 51 has a skirt long enough to cover part of the distal container in the vicinity of its open end. It turns out that this distal container 11 is itself housed inside a cap 56 made of molded synthetic material which ensures its protection. The cap 56 is pre-fitted into the skirt of the capsule 51. For other uses, the cap 56 could be removed and the distal container could be directly engaged, around its open upper part, inside the skirt capsule 51.

Figures 6 to 9 illustrate another embodiment of the device for use as a syringe for the injection of the reconstituted medicinal substance. Figure 6 shows storage, Figure 7 activation, Figures 8 and 9 use in the context of a mechanical multi-dose system. As previously, the device 10 comprises a distal container 11 containing for example a lyophilisate 12 and a proximal container 13 containing for example a solvent 14, as well as a transfer rod 15 intended to allow communication between these two containers through a conduit tubular 16. The distal container 11 has a closed bottom 17 and has an opening 18 at its end opposite the bottom 17. 11 is closed by a shutter-piston-valve 19 which delimits a chamber 20 containing the lyophilisate 12. The proximal container 13 has an upper opening 21 closed by a crimped capsule 22. As this container is open at its two ends, its other end 23 is closed by a valve-piston-shutter 24. The piston-valve shutter 19 has a central recess 25 and the obturator-piston-valve 24 has a central recess 26, these two obturators being intended to receive respectively two end caps 27 and 28 of the a transfer rod 15. The obturator-piston-valve 24 comprises a precut slot 31 which acts as a valve and which is intended to receive the end of the transfer rod 15 and the obturator-piston-valve 19 also comprises a pre-cut slot 33 acting as a valve which is intended to be crossed by the other end of the transfer rod 15.

It can be seen that, apart from a few construction details, the elements described above are identical to those described with reference to FIGS. 1 to 4. However, it will be noted that the proximal container 13 is housed inside a first element tubular 40 whose proximal end is capped with a protective cap 41 and that the distal container 11 is housed inside a second tubular element 42 partially engaged inside the first tubular element 40.

In the storage position shown in Figure 6, the two tubular elements 40 and 42 define a substantially cylindrical box inside which is housed the device 10 as shown in Figure 1. In order to activate this device, the second element 42 comprises a series of notches 43 which can be arranged over the entire periphery of the element or only over a determined zone of this periphery. These notches are intended to cooperate with at least one flexible tongue 44 formed inside the side wall of the element 4-0 in order to generate predetermined braking forces intended to regulate the relative axial movement of the two elements 40 and 42 and with a view to defining non-return stops preventing the recoil or withdrawal of the second element 42 when it is engaged inside the first element 40.

FIG. 7 represents the phase of activation and preparation of the mixture of the two components. In this phase, the tubular element 42 has been pushed inside the tubular element 40, which has the effect of moving the distal container in the direction of the proximal container. 11 results on the one hand from the penetration of the two ends of the transfer rod into the slots constituting the valves of the valve plugs-pistons-corresponding valves, the displacement of the valve-piston-valve 24 axially inside the proximal container and the flow of the solvent into the chamber 20 where the lyophilisate 12 is located. At the end of this activation phase, the mixing of the two basic substances or constituents of the medicinal substance is finished and this substance is ready for use. employment. FIG. 8 illustrates the last phase of preparation which consists in degassing or unballasting the device which, in this case, is equipped with a needle 45 for the injection of the reconstituted medicinal substance. The second tubular element 42 has been completely pushed back inside the first tubular element 40, the distal container in which the lyophilis has been dissolved has been completely degassed, and a thrust exerted on the bottom 17 of said distal container a suitable pusher 46 makes it possible to penetrate the shutter-piston-valve 19 bearing against the solution contained in said distal container. Subsequently, this valve-piston shutter has a piston function and delivers the solution through the conduit 16 of the transfer rod 15 in the direction of the injection needle 45.

At the end of the use phase illustrated in FIG. 9, the pusher

46 has pushed the distal container completely in the direction of the proximal end of the device in such a way that the obturator-piston-valve 19 has been pushed back completely inside the distal container and that almost all of the injectable substance constituted by the reconstituted medicinal substance solution has been drained.

Furthermore, it will be noted that the second cylindrical element 42 is completely fitted into the first cylindrical element 40 and that the notch (s) 43 cooperate with the flexible tongue 44 to block the two elements relative to each other and prevent any return of the second element to its initial position. Thanks to these organs, the device is guaranteed to be non-reusable.

Figures 10 to 13 show a variant which can be considered as an improvement of the device as shown in Figures 1 to 4 and in fact corresponding to what one could call the primary tank. The device as represented by FIG. 10 in the stored state corresponds substantially to the association of said primary reservoir as represented by FIG. 1 with its distal container 11, its proximal container 13 and its transfer rod 15, housed at least partially, at least during storage, inside a cylindrical body or sleeve 60. This sleeve is preferably made of molded synthetic material. It includes its anterior end a zone of reduced thickness 61 which can be easily perforated by an attached needle as shown in FIG. 12. Furthermore, it will be noted that the transfer rod contains the internal conduit 16 which is preferably constituted by a hollow metal cannula which is molded.

FIG. 11 shows the device 10 in the final activation phase, the solvent 14 having been transferred through the transfer rod 15 into the chamber 20 of the distal container 11 to dissolve the lyophilisate 12.

FIG. 12 illustrates the degassing phase of the syringe obtained by adding a needle 62 preassembled on a base 63 and protected by a protective cap 64. It will be noted that the distal container 11a. has been pushed towards the proximal end of the device in order to evacuate the air contained in the chamber 20 of said distal reservoir after the mixture has been produced.

Figure 13 shows the device at the end of use. It will be noted that the cap 64 has been repositioned at the end of the device to mask the needle and prevent the nursing staff from an accidental injury by this pricking tool. Finally, the two distal and proximal containers are fitted one inside the other and completely housed inside the sleeve 60, which prevents any re-use of the syringe since it is impossible, without breaking this sleeve, to pull the distal container back. Even if this operation could be carried out, the security obtained by effective separation of the valve stoppers and of the transfer rod remains acquired, as has been explained with reference to the description of FIGS. 1 to 4.

FIGS. 14 to 18 illustrate another embodiment, which derives from the previous embodiment, in which the sleeve 60 has been replaced by a sleeve 60 'longer than the sleeve 60. To this sleeve 60' is added a push cap 70 as well as a metering mechanism 71, known per se and marketed for example under the name "PEN" or the like. The device 10 comprises as before, the following main elements which are the distal container 11, the proximal container 13 and the transfer rod 15. It is represented by FIG. 14 in the storage state. Figure 15 shows the activated state. FIG. 16 represents the activated device and equipped with the dosing mechanism 71. FIG. 17 represents the activated device equipped with the dosing mechanism and provided with an injection syringe 72. FIG. 18 represents the device at the end of use.

Figures 19 to 22 illustrate the device adapted for application in the ophthalmic field. It will be noted that in this embodiment the proximal container 13 is made of synthetic material molded in one piece with the sleeve 60 which contains said proximal container integrally and partially, at least during storage, the distal container 11. The sleeve 60 is extended by a eye drop applicator consisting of a tip 54 substantially identical, at least in its function, to that described with reference to Figure 5. This tip could also be in the form of a nasal spray. A protective cap 53 ensures a sealed and sterile closure of the device during the storage phase represented by FIG. 19 and the activation phase represented by FIG. 20. The use phase is represented by FIG. 21. The end of the use is represented by FIG. 22. It will be noted that the distal container 11 is fully inserted inside the sleeve 60, which guarantees the non-reuse of the device.

FIG. 23 represents an enlarged view of the shutter-piston-valve 24 and of the corresponding end of the transfer rod equipped with its central duct in the storage position. In this position, the end 15a of the transfer rod proper is engaged in a first zone 24a of the shutter-piston-valve 24, this engagement being carried out so as to guarantee a perfect seal and a sterile barrier thanks to a elastic compression which is exerted on the surface 15b. Also in this position, the end 16a of the conduit 16, which is delimited by a planar section substantially perpendicular to the axis of this conduit, is in abutment against the entry of the slot 31 which constitutes the valve of the shutter-piston-valve 24. As mentioned previously, this valve is kept closed in sealed manner by the compression of the relatively large material which surrounds its lips. The opening of this valve is not carried out, as in many prior systems, under the effect of the pressure exerted by a liquid substance which is forced through the conduit 16 but under the mechanical pressure of introduction of the end 16a of this conduit. Therefore, the seal between the walls of the conduit 16 and the lips of the slot 31 remains preserved and the central recess 26 of the shutter-piston-valve

24 never comes into contact with the components of the two containers or with the reconstituted substance.

FIG. 24 represents an enlarged view similar to that of FIG. 23, but concerning the obturator-piston-valve 19 in the state of storage. As before, the other end 15c of the transfer rod 15 is engaged in a central recess 32 of the obturator-piston-valve 19 and the end 16c of the conduit is in abutment against the entry of the slot 33 acting valve. Sealing and sterility are guaranteed at the level of the surface 15d thanks to the compression exerted by the material of the obturator-piston-valve 19 on the end 15c of the transfer rod in the zone concerned. Similarly, the seal between the end 16c of the conduit 16 and the lips of the slot 33 is ensured when this end is engaged in said slot.

It will also be noted that for the two valve-piston shutters 19 and 24, respectively represented by FIGS. 24 and 23, the ends 15a on the one hand and 15c on the other hand of the transfer rod 15 have a harpoon shape. provided with stops ensuring a relatively firm connection of the transfer rod and valve-piston plugs during the storage phase. Thanks to this form of harpoon, these ends 15a and 15c define stops and connecting means which make it possible to define an extremely precise position of said valve-piston-shutters inside the device. FIG. 25 represents the valve-piston-shutter 24 of FIG. 23 in the activation position of the device. The end 15a of the transfer rod has been pushed back inside the central recess 26 and the end 16a of the conduit 16 has been pushed back through the pre-cut slot 31. This figure clearly shows that the sealing zones and sterility mentioned above are preserved in this phase.

FIG. 26 represents the shutter-piston-valve 19 represented by FIG. 24, in the activation phase. Here again, the end 15c of the transfer rod 15 has been pushed back inside the central recess 32 and the end 16c of the conduit 16 has been pushed through the precut slot 33. As before, the zones d tightness and sterility barriers are preserved in this phase.

Figures 27 to 30 illustrate different accessories or peripherals intended to be associated with the device 10 for specific uses of this device. In particular, FIG. 27 is an enlarged view of the end of the device 10 as shown in FIG. 12, the needle 62 mounted on a base 63 is protected by a protective cap 64.

FIG. 28 represents another embodiment in which a transfer needle 62a is protected by a rigid guard 80 made of synthetic material, this needle 62a being moreover covered with a flexible sleeve 81. This sleeve 81 has the function of avoiding nebulization of the substance reconstituted inside the device 10 at the time of connection of this device to another container such as for example a transfusion bag, through the transfer needle 62a. Indeed, due to a slight overpressure prevailing inside the device 10, there could be a nebulization of the medicinal substance, which can be dangerous for the nursing staff. This nebulization is avoided thanks to the protection provided by the sleeve 81 which is flexible and folds in on itself as the transfer needle is inserted into an appropriate end of the transfusion bag, then unfolds during withdrawal and disconnection to close the device 10. Figure 29 shows the device 10 provided with a sleeve 60a having substantially the same functions as the sleeve 60 shown in Figure 10. On the end of this sleeve is adapted a tip 60b having the shape of a female Luer cone allowing ensure the connection of accessories such as a needle holder support, a male Luer connection connector, etc. .

Figure 30 is similar to Figure 29 but the tip 60b has been replaced by a tip 60c in the form of a male Luer cone.

The following figures schematically represent the kinematic phases of assembly and construction of the device 10 and its components in the various cases, that is to say when the distal container is intended to contain a lyophilisate, a liquid more or less pasty and a powder. Figure 31 shows the distal container 11 stored in a cassette 90. Note that this tight storage is possible thanks to the cylindrical shape of this container. Figure 32 illustrates the filling of the distal container 11 with a solution intended to be lyophilized.

FIG. 33 illustrates a phase of prepositioning the shutter-piston-valve 19.

FIG. 34 illustrates the freeze-drying phase during which the vapor and the gases can escape through grooves 91 formed on the lower zone of the shutter-piston-valve 19. It will be noted that the transmission of energies is easy thanks to the bottom flat of the bottle which promotes the homogeneous formation of ice crystals and the almost total drying of the lyophilized product.

Figure 35 illustrates the sealing phase of the distal container. This closure is effected by depressing the obturator-piston-valve 19 by means of a pusher 92 which can be formed directly by the ceiling of the freeze-drying chamber inside which the operation is carried out. . FIG. 36 illustrates a phase of positioning the obturator-piston-valve 19, positioning which is done automatically by aspiration of this member inside the distal container in which the vacuum prevails, then mechanically to adjust the final position.

FIG. 37 illustrates the return of the filled containers to the magazine 90.

It will be noted that all of these operations are carried out with standard means widely used in the pharmaceutical industry.

In the case where the active substance contained in the container 11 is a liquid and not a lyophilisate, the process is simplified since it only comprises the filling phases represented by FIG. 32, of prepositioning of the shutter-piston-valve represented by FIG. 33 and of the final positioning of this obturator-piston-valve, possibly by means of an appropriate pusher which allows degassing inside the container.

Figures 38 to 4-4 illustrate the filling of the distal container 11 with a powder. In particular, FIG. 38 shows the containers 11 housed in a cassette 90. FIG. 39 illustrates the filling of the container 11 by means of a dose of powder, these doses being contained in cups 93 mounted on a feed system of the wheel type 94, used in the pharmaceutical industry.

FIG. 40 illustrates a phase of prepositioning the obturator-piston-valve 19, accompanied by a degassing phase by means of a suction nozzle 95 of suitable shape. This tip comprises for this purpose a cannula 96 which is engaged through the slot 33 of said shutter-piston-valve. After removal of this instrument, the distal containers are introduced in bulk on a transfer tray 97 from which they emerge in an orderly arrangement for further processing as shown in Figure 41. Figure 42 shows the distal container 11 with its obturator-piston-valve 19 prepositioned as it emerges from the transfer plate 97 of the figure

41. This phase of vibration of the powder is necessary to ensure its compaction at the bottom of the container. The positioning precision of the obturator-piston-valve 19 inside the distal container 11 is accompanied, as shown in FIG. 43, by a suction of the gases surmounting the powder through the cannula 96 described with reference to FIG. 4 -0. Figure 44 illustrates the distal container 11 with the shutter-piston-valve positioned properly.

The powder is scraped from the walls of the container during the installation of this obturator-piston-valve thanks to the pressure which it exerts on these walls. However, a decontamination phase consisting in removing the powder residues from the interior and exterior walls of the distal container remains necessary.

FIGS. 45 to 54 illustrate the assembly of the device 10 more specifically intended for an ophthalmic application. Figure 45 illustrates the proximal container 13 housed in a cassette 100. This container corresponds to those which have been described previously with particular reference to Figure 5 and Figures 19 to 22. Figure 46 illustrates the filling phase of this container 13 by means of a liquid 14 which may be a solvent or a diluent, as has been mentioned previously. FIG. 47 illustrates the phase of fitting the shutter-piston-valve 24 inside the container 13.

After these various interventions, the containers 13 are replaced in cassettes 100 (see FIG. 48). As before, this tight storage in a cassette is only possible thanks to the fact that these containers have a cylindrical shape devoid of roughness and in particular protuberant fins.

The containers 13 placed in a cassette can be stored for a longer or shorter period of time and possibly subjected to treatment such as for example sterilization. This phase is illustrated by FIG. 49. FIG. 50 represents a cassette 90 in which the distal containers are placed 11. FIG. 51 illustrates the positioning of the transfer rod 15 in the proximal container 13.

FIG. 52 illustrates the terminal assembly phase which consists in placing the distal container 11 on the transfer rod 15 previously positioned inside the proximal container 13. The FIG. 53 illustrates a phase of visual control of the pre-assembled device 10. FIG. 54 illustrates the device 10 fully assembled and checked following the various interventions specified above.

It will be noted that all of these operations can be carried out in standard equipment widely used in the pharmaceutical industry and do not require any special machine for assembling the various components of the device. To facilitate this assembly and reduce the cost, the number of changes in storage methods, in particular the number of passages from an ordered arrangement to a disordered arrangement and vice versa, is limited to the minimum.

FIGS. 55 to 62 illustrate the method of preparation of the proximal container 13 and the positioning of the transfer rod 15. The empty container 13 is, as shown in FIG. 55, housed in cassettes 100. FIG. 56 illustrates the positioning phase of the obturator-piston-valve 24 inside this container 13. FIG. 57 illustrates the filling phase of the solvent or diluent 14. FIG. 58 illustrates the encapsulation of this container; that is to say the placement of the capsule 22. FIG. 59 illustrates the return of the containers 13 in the cassettes 100 with a view to their temporary storage or subsequent treatments such as, for example, sterilization. FIG. 60 illustrates the positioning of the containers 13 as they are stored in the cassettes 100 after any sterilization treatments or the like, inside a sleeve 60 as shown in FIG. 10. These sleeves 60 are themselves removed from cassettes 110 where they have been stored for this assembly. FIG. 61 represents the installation of the transfer rod 15 on the proximal container 13 previously mounted inside the sleeve 60. FIG. 62 represents the installation of the distal container 11 on the other end of the transfer rod transfer 15 previously assembled as shown in Figure 61.

Again it can be said that the assembly is done with standard means which are commonly used in the pharmaceutical industry and which do not require special equipment. In in addition, most of the components and in particular the distal and proximal containers as well as the sleeve in which the proximal container is placed are housed in cassettes which reduces or eliminates the number of passages from an ordered state to a disordered state.

Claims

1. Device for the preparation of a solution, a suspension or an emulsion of an active medicinal substance, from two components, one of which is in the form of powder, lyophilisate, liquid or of dough and the other of which is a diluent or a liquid solvent, and which are respectively stored in two elongated containers, namely a distal container (11) with closed bottom (17) and a proximal container (13), which each have, at one of their ends, an opening closed by a valve shutter-piston, axially movable in the corresponding container, these two valve-piston shutters (19, 24) being connected by a transfer rod (15) this transfer rod being arranged to provide a rigid, leaktight and sterile coupling link between the two valve plugs (19, 24) when the device (10) is in a first position called the storage position, and to define a communication channel waterproof and st rile between the two containers (11, 13) when the device is in a second position called the position of use, in which the distal container (11) contains said component in the state of powder, lyophilisate, liquid or paste and the proximal container (13) contains said diluent or liquid solvent (14), in which the distal container has a cross section greater than that of the proximal container, the valve-piston valve (19) of the distal container (11) having a cross section greater than that of the obturator-piston-valve (24) of the proximal container (13), in which the ends of the transfer rod (15) are cut along a plane substantially perpendicular to its longitudinal axis, and in which these valve plugs have a central zone provided with a slot (31, 33) which is highly compressed and sealed when the device is in the storage position, and open when one end of the rod ansfert (15) is introduced, the device being in said second position.

2. Device according to claim 1, characterized in that it comprises a sleeve (60) in which is housed the proximal container (13) and at least partially the distal container (11 ⁾ .

3. Device according to claim 2, characterized in that the sleeve (60) is associated with a push cap (70) and with a metering mechanism (71) for the application of multiple doses.

4. Device according to claim 2, characterized in that said sleeve (60) is made in one piece by molding with the proximal container (13).

5. Device according to claim 4, characterized in that said sleeve (60) is provided with a tip (54) constituting an eye drop applicator or a nasal sprayer, integrated into the proximal container (13).

6. Device according to claim 2, characterized in that said sleeve consists of a first tubular element (40) and a second tubular element (42) nestable one inside the other, the first tubular element containing said proximal container (13) and said second secondary element containing said distal container (11).

7. Device according to claim 6, characterized in that said first tubular element comprises notches (43) and in that said second tubular element comprises at least two tongues (44) arranged to cooperate with said notches.

8. Device according to claim 1, characterized in that said valve plugs-pistons (19, 24) each comprise a central recess (respectively 32, 26) and in that said transfer rod (15) comprises means of sealed and sterile coupling with said plugs-pistons-valves (19, 24).

9. Device according to claim 1, characterized in that said transfer rod (15) comprises stop stops arranged to bear against the facing surfaces of the piston shutters- corresponding valves when the device is in the use position.

10. Device according to claim 1, characterized in that said valve shutters-pistons (19, 24) are arranged to ensure a sealed and sterile closure of the corresponding containers (11, 13), by pressing against the interior walls of these containers , so that these containers can be stored and processed independently.

11. Device according to claim 1, characterized in that said transfer rod (15) is arranged to ensure a rigid, sealed and sterile coupling of said obturators-piston-valves (19, 24) made integral with said distal containers (11) and proximal (13).

12. Device according to claim 1, characterized in that said proximal container (13) is arranged to be able to receive various tips and applicators according to the intended therapeutic uses.