JP4647953B2 - Single agent type solid preparation for bicarbonate dialysis and method for producing the same - Google Patents

Description

  The present invention relates to a one-pack type bicarbonate dialysis solid preparation for preparing a bicarbonate dialysis solution used for dialysis therapy of renal failure patients. Specifically, the present invention relates to a mother particle that is a core particle during granulation. Single agent type solid preparation for bicarbonate dialysis excellent in moisture resistance, stability, content uniformity, fluidity, and solubility, the surface of which is covered with a coating layer that contains a specific salt and is preferably fused. And it is related with the manufacturing method excellent in the productivity.

  Dialysis therapy has been established as a treatment method for patients with renal failure, and is performed as a regular permanent treatment for the purpose of removing wastes, adjusting electrolytes, and the like. The dialysate used for dialysis therapy is prepared so as to have a composition similar to a normal serum electrolyte concentration, and in recent years, a bicarbonate dialysis agent having a small burden on a living body is used. Since bicarbonate bicarbonate reacts with calcium chloride and magnesium chloride to cause precipitation of carbonate, bicarbonate dialysate generally contains a preparation (agent A) that contains calcium chloride or magnesium chloride and does not contain sodium bicarbonate. It is divided into two preparations containing sodium carbonate and not calcium chloride or magnesium chloride (agent B), and each is dissolved, diluted and mixed immediately before use to prepare a bicarbonate dialysate.

  Currently, the main formulation types used in hemodialysis are A liquid concentrate + B liquid concentrate “liquid type”, A liquid concentrate + B powder (sodium bicarbonate) “liquid powder type”, A powder There are three types of "powder type" of + B powder. Concentrated concentrates of “Liquid / Liquid Type” and “Liquid Powder Type” are usually bulky and heavy because the polyethylene container is filled with a concentrated liquid of around 10 kg. Although there were various problems regarding space, handling methods, disposal of used containers, etc., these problems have been greatly improved by the spread of “powder type”.

  However, even though it is a powdered "powder type", it is still divided into two parts of agent A and agent B as in the case of the liquid agent, and it is still not sufficient from the viewpoint of handling. State. Therefore, in order to further improve the work efficiency in hospitals, one-part powder preparations in which agent A and agent B are combined have been developed.

  For example, Patent Literature 1, Patent Literature 2 and Patent Literature 3 disclose a method for producing a layered preparation having a multilayer structure while each raw material is pulverized in advance and sprayed with water or an aqueous glucose solution. All of these production methods are not practical because the production process is complicated, such as repeated pulverization of raw materials, spray coating and drying many times, and the energy intensity is remarkably deteriorated. In addition, since a large amount of water is required, bicarbonate and glucose may be decomposed during production. Furthermore, the spray-dried preparation has a fragile coating layer, which causes the working environment to deteriorate due to powdering or the like in the medical field. In addition, in the preparations disclosed in Patent Document 1, Patent Document 2 and Patent Document 3, the outermost layer is bicarbonate, and when dissolved, it dissolves sequentially from bicarbonate that is alkaline. Since it produces | generates, it is not preferable.

  In Patent Document 4, an aqueous solution of calcium chloride and magnesium chloride is added to a mixture of sodium chloride and potassium chloride, mixed, and further mixed with sodium citrate, dried, sieved, and granulated. A manufacturing method is disclosed in which glucose, citric acid, and sodium bicarbonate are blended with this. However, in this method, a strong viscosity is generated in the contents during the granulation and adheres to the equipment, so that the content uniformity and yield are lowered and workability is remarkably deteriorated. In addition, since a large amount of water is required for granulation, there is a drawback that the energy intensity is deteriorated. Furthermore, since the preparation obtained by this production method is in direct contact between the acid component and the alkali component, or glucose and the alkali component, there is a problem that the storage stability is lowered. Further, since magnesium chloride or calcium chloride having high hygroscopicity adheres to the particle surface, the hygroscopicity becomes high and causes caking.

Patent Documents 5 and 6 disclose a preparation in which sodium bicarbonate is coated with sodium chloride, potassium chloride or sodium acetate. When sodium bicarbonate is coated with sodium chloride, potassium chloride or sodium acetate, these salts are highly hygroscopic and may cause caking or decompose.
Japanese Patent No. 3415291 JP-A-10-259133 JP 2000-26280 A Japanese Patent Laid-Open No. 10-87478 JP 10-330270 A JP 2001-70440 A

  An object of the present invention is to provide an electrolyte containing citrate and the like necessary for preparing a bicarbonate dialysis solution, glucose, a pH adjuster, and a solid agent for bicarbonate dialysis containing sodium bicarbonate in the production stage. In addition, glucose and sodium bicarbonate exist stably during storage, there is no fear of decomposition or coloration, storage stability, content uniformity, moisture resistance, fluidity, solubility, extremely little powdering, It is an object of the present invention to provide a single agent type solid preparation for bicarbonate dialysis that has extremely good workability and prevents generation of static electricity, and a new production method that is simple and excellent in productivity.

  As a result of intensive studies to achieve the above object, the inventors of the present invention set the stirring temperature and the shearing force within a predetermined range in the presence of a small amount of water in a system where calcium chloride and glucose exist. When stirring and mixing for a predetermined time or more, a specific salt is contained in the mother particle without using a complicated granulation operation or special equipment, and preferably a fused coating layer is formed, and the above-mentioned problem is achieved. I found a thing.

  That is, the present invention (1) is a thin film X-ray in a one-pack type bicarbonate dialysis solid preparation containing sodium chloride, potassium chloride, calcium chloride, magnesium chloride, citrate, pH adjuster, glucose and sodium bicarbonate. Sodium bicarbonate is covered as a mother particle with a coating layer containing a salt having a peak at 2θ = 10.0 to 10.2 ° (CuKα; λ = 1.54058 mm, incident angle θ = 1 °) by diffraction. It is a solid preparation for bicarbonate dialysis characterized by the following.

  In addition, the present invention (2) is a solid preparation for bicarbonate dialysis according to the invention (1), which is granular and / or fine granular.

  Further, according to the present invention (3), the salt having a peak at 2θ = 10.0 to 10.2 ° (CuKα; λ = 1.54058Å, incident angle θ = 1 °) by thin film X-ray diffraction is calcium chloride and glucose. It is a solid preparation for bicarbonate dialysis of the one-part type of the invention (1) or (2).

  The present invention (4) is the one-agent type solid preparation for bicarbonate dialysis according to any one of the inventions (1) to (3), wherein the coating layer is fused.

Furthermore, the present invention (5) has a water vapor transmission rate (40 ° C., 90% RH) of 2.0 g / m ² · 24 hr or less, and is housed in a moisture-proof packaging material having a laminated structure having a back electrode effect. (1) It is a solid agent for bicarbonate dialysis in any one of (4).

In addition, the present invention (6) is a method for producing a solid preparation for bicarbonate dialysis containing sodium chloride, potassium chloride, calcium chloride, magnesium chloride, citrate, pH adjuster, glucose and sodium bicarbonate as raw materials. The method includes the following steps [1] to [4]:
[1] A powder and / or granule containing at least one solid ingredient other than sodium bicarbonate and sodium bicarbonate contains at least one solid ingredient other than water or sodium bicarbonate. Adding a solution to be stirred and mixing at a temperature of 55 ° C. or lower to obtain a mixture (wherein the mixture contains at least sodium bicarbonate, calcium chloride, and glucose);
[2] Granulate and / or fine granulated by stirring and granulating the mixture of step [1] for 1 minute or more at a temperature of 55 ° C. or less under a shearing force of 0.003 kW / kg or more per 1 kg of the mixture Obtaining a product;
[3] a step of drying the granulated product of step [2]; and [4] a step of mixing the granulated product of step [2] with a pH adjusting agent before or after step [3].
In addition, the “shearing force” in the present specification refers to a value calculated by the following formula:
Shearing force [kW / kg] = {(Current value [A] when loaded-Current value [A] when no load] / Rated current value [A]} x Motor capacity [kW] / Content weight [kg]
Current value during loading: Current value of the stirring motor of the stirring type mixing granulator during stirring granulation [A]
Current value at no load: Current value [A] of the stirring motor of the device during idling (same rotation speed as stirring granulation)
Rated current value: Rated current value [A] of the stirring motor of the equipment
Motor capacity: Motor capacity [kW] of the stirring motor of the device
Content weight: Weight of the mixture in the apparatus during stirring granulation [kg]

  Furthermore, the present invention (7) is the method for producing a solid preparation for single-agent bicarbonate dialysis according to the invention (6), wherein the viscosity of the solution is 0.001 to 2 Pa · s.

  Moreover, this invention (8) is the said invention (6) or the quantity whose amount of water or the water in this solution is 0.05 to 5.0 weight% of the weight of this powder and / or granule. (7) A method for producing a solid preparation for single-agent bicarbonate dialysis.

  Furthermore, the present invention (9) is the method for producing a solid preparation for bicarbonate dialysis according to any one of the inventions (6) to (8), wherein the solution is an aqueous solution containing glucose and magnesium chloride. is there.

  Further, in the present invention (10), the one-pack type bicarbonate dialysis solid agent is the one-part bicarbonate dialysis solid agent according to any one of the aforementioned inventions (1) to (5). ) To (9).

  The solid agent according to the present invention is a salt having a peak at 2θ = 10.0 to 10.2 ° (CuKα; λ = 1.54058 mm, incident angle θ = 1 °) by thin film X-ray diffraction (this salt is referred to as “the salt”). This is a granulated product in which sodium bicarbonate is coated as a mother particle in a coating layer containing a salt), and a film is formed by spraying an electrolyte such as sodium chloride or potassium chloride or an aqueous solution of glucose. Because the surface is denser (for example, the coating shown in FIG. 1, FIG. 2, and FIG. 7) compared to the coating (eg, the coating shown in FIG. 3) manufactured by the spray granulation method or the like. It is not easily affected by external factors, has excellent wear resistance, moisture resistance, and storage stability, and also has good fluidity and excellent solubility, so it can be used for dissolution operations in the medical field. There is an effect that workability is extremely good compared to the conventional one.

  Furthermore, according to the method for producing a solid preparation according to the present invention, it is possible to avoid the risk of decomposition and coloration of glucose and sodium bicarbonate during granulation, and require complicated operations such as grinding and sieving. Thus, a solid preparation for single-part bicarbonate dialysis excellent in content uniformity can be obtained. Specifically, according to the present production method, the solid agent according to the present invention becomes a granular and / or fine granulated product which is dry and apparently dried at the end of granulation. Handling such as drying, mixing, etc. becomes extremely easy.

  In the case where the coating layer in the solid agent according to the present invention is fused, the above effect is particularly strong.

  First, the single agent type solid preparation for bicarbonate dialysis according to the present invention will be described. The solid preparation for single-agent bicarbonate dialysis according to the present invention is composed of various electrolytes (sodium chloride, potassium chloride, calcium chloride, magnesium chloride and citrate), pH adjusters, glucose and sodium bicarbonate. Is included. The citrate used here is preferably sodium citrate. Further, the pH adjuster is not particularly limited as long as it is a pharmacologically acceptable solid organic acid, and examples thereof include lactic acid, citric acid, malic acid, sodium diacetate and the like. May be used alone or in combination. Preferred is citric acid.

  The feature of the solid preparation for single-agent bicarbonate dialysis according to the present invention is that sodium bicarbonate is covered as mother particles with a coating layer containing a specific salt.

  First, the coating layer according to the present invention will be described. The coating layer contains a salt having a peak at 2θ = 10.0 to 10.2 ° (CuKα; λ = 1.54058 °, incident angle θ = 1 °) in thin film X-ray diffraction. Here, as a result of identifying the essential components of the salt by the elimination method, it was found that the salt contains a reaction product of calcium chloride and glucose. In addition, the strength of the peak of the salt is not limited.

  Normally, calcium chloride as a raw material, when coexisting with glucose and sodium bicarbonate, promotes the decomposition thereof and remarkably deteriorates the storage stability of the agent. In addition, calcium chloride and sodium bicarbonate react with each other to form a hardly soluble carbonate, which causes precipitation when the solid agent is dissolved and causes an increase in pH. However, the solid preparation for single-agent bicarbonate dialysis according to the present invention is presumed that most calcium chloride specifically reacts with glucose in the stirring granulation step and is contained in the coating layer as the salt. It suppresses the decomposition of glucose and sodium bicarbonate, and also suppresses the formation of sparingly soluble carbonates. Furthermore, since sodium bicarbonate is covered with the coating layer, direct contact with the pH adjusting agent is prevented, so that decomposition and carbonate formation can be suppressed, and storage stability is extremely excellent. In addition, it has been confirmed that a solid preparation for single-agent bicarbonate dialysis containing the salt has a predetermined electrolyte ion concentration and glucose concentration when dissolved in predetermined water. In addition, the coating layer according to the present invention may contain components other than the salt. For example, sodium chloride, potassium chloride, magnesium chloride and / or a raw material component of a solid preparation for single-agent bicarbonate dialysis may be used. It may contain citrate.

  Furthermore, the coating layer according to the present invention is particularly preferably fused. First, “fused” means an appearance as when the melt is solidified, and can also be referred to as “aggregated”. In addition, it means that the appearance is fused, and does not mean that it is actually heated to the melting point or higher to be melted. It can also be expressed as amorphous (this does not mean that it is composed of amorphous material, but means that the appearance appears to be amorphous). In addition, not all need to be integrally fused, and may be in a state of containing particles on the surface or inside. Here, the difference between the coating layer formed by a conventional manufacturing method (for example, spray granulation) and the “fused coating layer” according to the present invention will be described with reference to an image diagram. First, as shown in FIG. 3, the coating layer formed by the conventional manufacturing method has a structure in which countless particles C are deposited on the base particle 2 '. And as shown in FIG. 5, it is understood that the particle | grains C and the particle | grains C are couple | bonded through the binder D, or have taken the structure on which it just got on the particle | grains. On the other hand, as shown in FIG. 1, the “fused coating layer” according to the present invention has an appearance as if most of the particles are fused and integrated, rather than the particles being deposited. However, it is sufficient that the appearance is mostly integrated. Even if particles A that are not fused are present on the surface or inside of the coating layer 1 as shown in FIGS. This corresponds to the “fused coating layer” in the invention.

  Therefore, such a coating layer has a particularly dense surface as shown in FIGS. 1, 2, and 7, and is difficult to generate dust.

  In addition, the solid preparation for one-part type bicarbonate dialysis according to the present invention is excellent in moisture resistance despite having high hygroscopic magnesium chloride, and has good smooth fluidity even at the end of granulation. Although it becomes a granulated product, it is thought that this is because magnesium chloride is not adhered or deposited on the surface of the granulated product but is contained in a stronger fused coating layer. Therefore, this solid preparation is easy to handle during production, and is excellent in content uniformity and storage stability.

  Next, the mother particles according to the present invention will be described. The mother particle according to the present invention is not particularly limited except that it contains sodium bicarbonate and contains one or more raw material components other than sodium bicarbonate. For example, mother particles composed of sodium bicarbonate and sodium chloride, mother particles composed of components other than sodium bicarbonate and sodium chloride (for example, potassium chloride, citrate, glucose, pH adjuster), or sodium bicarbonate, sodium chloride And mother particles composed of components other than sodium chloride. For example, in the embodiment, the mother particles of most particles are made of sodium chloride and sodium bicarbonate, and the mother particles of the remaining particles are made of other raw material components. The total amount of sodium bicarbonate used in the present invention is preferably present as mother particles, but a part may be present in the coating layer as long as the effects of the present invention are exhibited.

  As described above, as long as sodium bicarbonate is covered as a mother particle with a coating layer containing the salt, for example, sodium chloride is contained in the coating layer or glucose is contained in the mother particle. Furthermore, the raw material component and reaction product of the solid preparation for single-agent bicarbonate dialysis may be contained in either the mother particle or the coating layer, or in both. However, magnesium chloride is preferably included in the coating layer.

  The solid preparation for single-agent bicarbonate dialysis according to the present invention is typically a granular and / or fine granulated product. And the average particle diameter is about 200-800 micrometers, and it is suitable that the thickness of a coating layer is 5-70 micrometers. Here, the granulated product may be a single particle in which a coating layer is formed on the surface of the mother particle, or a plurality of coated mother particles may be bonded via the coating layer. Good. Of the granulated material, the shape of a single particle is centered on a slightly rounded cube. On the other hand, what is bonded via the coating layer is a shape in which several coated cubic particles are bonded.

Next, according to the present invention, a method for producing a solid preparation for one-pack type bicarbonate dialysis containing sodium chloride, potassium chloride, calcium chloride, magnesium chloride, citrate, pH adjuster, glucose and sodium bicarbonate as raw materials. explain. The method for producing a solid preparation for single-agent bicarbonate dialysis according to the present invention comprises:
[1] A powder and / or granule containing at least one solid ingredient other than sodium bicarbonate and sodium bicarbonate contains at least one solid ingredient other than water or sodium bicarbonate. Adding a solution to be stirred and mixing at a temperature of 55 ° C. or lower to obtain a mixture (wherein the mixture contains at least sodium bicarbonate, calcium chloride, and glucose);
[2] Granulate and / or fine granulated by stirring and granulating the mixture of step [1] for 1 minute or more at a temperature of 55 ° C. or less under a shearing force of 0.003 kW / kg or more per 1 kg of the mixture Obtaining a product;
[3] a step of drying the granulated product of step [2]; and [4] a step of mixing the granulated product of step [2] with a pH adjusting agent before or after step [3].

  By including the above-mentioned steps [1] and [2], a free-flowing granular and / or fine granulated product in which the coating layer as described above is formed on the mother particle is generated. It can be easily produced by mixing a pH adjusting agent before or after drying. In other words, even in a system in which sodium bicarbonate, calcium chloride, and magnesium chloride, which could not be achieved by the conventional formulation, are present at the same time, the decomposition of sodium bicarbonate is suppressed, and further, hardly soluble carbonate is not formed. A highly uniform solid preparation for single-part bicarbonate dialysis can be obtained very easily without going through complicated steps such as pulverization of raw materials. Here, the free-flowing granulated and / or fine granulated product has good fluidity, low adhesion and moisture absorption, and apparently dry surface, despite containing about 2 to 5 wt% of water. It is a granulated product. Therefore, handling such as mixing / transfer, which is the next process, becomes extremely easy. This will be described in detail below.

  First, “powder and / or granules” according to the present invention will be described. The “powder and / or granule” according to the present invention includes sodium bicarbonate and one or more raw material components of the solid agent other than sodium bicarbonate (sodium chloride, potassium chloride, citrate, calcium chloride) , One or more selected from the group consisting of raw materials consisting of magnesium chloride, glucose and a pH adjuster. In addition, the powder and / or granules are basically in a dry form.

  Here, when sodium chloride, potassium chloride, citrate, glucose, sodium bicarbonate is used as the “powder and / or granule”, the particle diameter of each particle is not particularly limited. A combination that makes the difference in diameter as small as possible is preferable in terms of maintaining uniformity. That is, the average particle size is preferably about 200 to 600 μm, and a combination in which the difference in average particle size of each particle is within 30% of the average particle size of all particles is preferable. However, the particle diameter of sodium bicarbonate is 100 μm to 500 μm, preferably 200 μm to 400 μm, more preferably 250 μm to 350 μm, in consideration of suppression of crystal precipitation and improvement of stability during dissolution. is there. The particle size of calcium chloride is preferably 300 μm or less in order to promote the salt formation reaction.

  Next, the “dissolved solution” in the “dissolved solution containing at least one raw material component of the solid agent other than water or sodium bicarbonate” according to the present invention will be described. Hereinafter, unless otherwise specified, this solution is referred to as “the solution”. The solvent of the solution is water. The solute of the solution is at least one selected from the group consisting of sodium chloride, potassium chloride, calcium chloride, magnesium chloride, citrate, glucose, and a pH adjuster, which are raw material components of the solid agent. In addition, each component does not need to be completely dissolved, and a part thereof may be in a solid state.

  The viscosity of the solution is preferably 0.001 to 2 Pa · s, more preferably 0.01 to 1.5 Pa · s, and still more preferably 0.015 to 1 Pa · s. is there. In addition, the viscosity here points out the value measured with the B-type viscosity meter (temperature 30 degreeC).

  Further, the amount of the water or the water in the solution is not particularly limited, but the present invention is characterized in that it can be produced with a small amount of water. A suitable amount of water (the total amount of water or the solution when the solution is added in several portions) is 0.05 to 5.0% by weight of the weight of the powder and / or granules. More preferably, it is 0.1 to 2.0% by weight, and particularly preferably 0.2 to 1.0% by weight. Here, the amount of water added to the system does not include crystallization water in the raw material.

  Furthermore, a particularly preferred embodiment of the solution is a solution containing glucose and magnesium chloride. In this case, a stronger coating layer can be formed. Here, the glucose concentration in the solution of this preferred embodiment is preferably 10 to 70% by weight, more preferably 20 to 60% by weight, and the concentration of magnesium chloride (hexahydrate) is preferably It is 10 to 70% by weight, more preferably 25 to 60% by weight. Thus, in the state where both coexist {the pH of the aqueous solution is in an acidic state (for example, about 4.5)}, glucose is stably maintained and both are dissolved at a concentration much higher than the single solubility. In addition, the viscosity of the solution of this preferred embodiment can be moderately lowered and adjusted to a viscosity suitable for granulation. For this reason, compared with other granulation methods, the whole can be uniformly coated with a very small amount of aqueous solution in a short time. In addition, the solution of this preferred embodiment can be prepared simply by dissolving glucose in an aqueous solution of magnesium chloride. Moreover, the solution of this preferable aspect may contain components other than these further, for example, the aspect which further contains electrolytes, such as a calcium chloride, can be mentioned.

  In addition, there is no restriction | limiting in particular in the addition method of water or this solution to this powder and / or a granule, Batch addition or division | segmentation addition may be sufficient, and the method of spraying may be used. The temperature of water or the solution (before addition) is preferably 15 to 50 ° C.

  A mixture obtained by stirring and mixing “powder and / or granules” and “a solution containing at least one raw material ingredient of the solid agent other than water or sodium bicarbonate” is at least sodium bicarbonate and chloride. Contains calcium and glucose. Here, these three components may be contained only in the powder and / or the granule, may be contained only in the solution, or may be contained in both.

  Preferred examples of the combination of “powder and / or granule” and “solution” include “powder and / or granule” containing sodium bicarbonate, sodium chloride, potassium chloride, citrate, glucose. It contains calcium chloride as an optional component, and the “dissolution solution” contains glucose and magnesium chloride, and contains calcium chloride as an optional component.

  In addition, it is not necessary to use all the raw materials of the solid preparation for single-agent type bicarbonate dialysis in “powder and / or granules” + “dissolved liquid”, and a part of the raw materials is mixed after stirring and granulating. For example, it may be added alone. However, with respect to the solid organic acid that is a pH adjuster, it is preferable to add the whole amount in a solid state before and after the step [3], and the other components are preferably used in the whole amount in the step [1]. is there.

  Next, the temperature at which stirring and mixing and stirring granulation are carried out is sufficiently possible at around room temperature, but the formation of the salt, the shortening of the granulating time, and the freezing (including about 2 to 5% by weight of water). Regardless, it has good fluidity, high moisture resistance, and free water, which causes adhesion and aggregation, becomes a granulated product with almost no surface on the surface of the coating layer) and prevents decomposition of glucose and sodium bicarbonate. From the viewpoint, the internal temperature is 55 ° C. or lower, preferably 25 ° C. to 50 ° C., and more preferably 35 ° C. to 45 ° C. Further, the time for carrying out the stirring and mixing and the stirring granulation is preferably 1 minute or longer in consideration of the time required for the reaction of the salt, the content uniformity of the produced granulated product and the freezing. Yes, more preferably 10 minutes or more, and even more preferably 15 minutes or more. Moreover, 60 minutes or less is suitable from a viewpoint of crushing prevention.

  Next, the shearing force applied at the time of stirring is demonstrated. First, the definition of the shearing force according to the present invention will be described. When a stirring type mixing granulator is used, at the time of stirring granulation according to the present invention, a shearing force is applied to the mixture between the stirring blade and the inner wall of the device by the rotation of the stirring blade. The magnitude of the shearing force was calculated by the above formula using the load of the stirring motor (current value of the motor) of the apparatus, and the value was defined as the shearing force applied per kg of the mixture. Next, the necessary shearing force is 0.003 kW / kg or more, preferably 0.01 kW / kg or more, and more preferably 0.03 kW / kg or more. Further, the upper limit is preferably 0.1 kW / kg or less from the viewpoint of increasing the internal temperature and preventing crushing.

  Further, at the time of stirring and mixing and stirring and granulation, it is preferable to forcibly exhaust the moisture in the machine out of the system in order to prevent adhesion to equipment and moisture absorption of the granulated product.

  In addition, as a stirring type mixing granulator used in a stirring mixing and stirring granulation process, a high-speed stirring type granulating apparatus is suitable. The purpose of the operation is sufficiently achieved within the range of general conditions for normal granulation.

  Next, the granulated product obtained in the stirring granulation step is dried. Although the drying apparatus used for a drying process is not specifically limited, A fluidized-bed drying apparatus, a rotary drying apparatus, etc. are suitable, and the objective is fully achieved within the range of the general conditions normally dried.

  Next, a pH adjuster is mixed before or after the drying step. A mixing apparatus for carrying out the mixing according to the present invention is not particularly limited, but a rotary mixing apparatus and a stirring mixing apparatus are suitable, and the objectives are sufficiently achieved within the range of general conditions for normal mixing.

If the solid preparation for bicarbonate dialysis according to the present invention is dissolved in predetermined water, the bicarbonate dialysis solution can be adjusted to the following concentration, for example:
Na ⁺ 125-150 mEq / l
K ⁺ 1.0-3.0 mEq / l
Ca ²⁺ 1.5-3.5 mEq / l
Mg ²⁺ 0.5-1.5 mEq / l
Cl ^- 90.0-135 mEq / l
Citrate ion 1.0-18.0 mEq / l
HCO ₃ ^- 20.0~35.0 mEq / l
Glucose 0.5-2.5 g / l

  When the solid preparation for single-part bicarbonate dialysis according to the present invention is prepared in a 1 to 15% solution, there is no precipitate formation without formation of hardly soluble carbonate during dissolution. In general, the time required for hemodialysis is about 5 hours, and the solid preparation for single-agent bicarbonate dialysis according to the present invention can be dissolved at a concentration of 15% for 5 hours or more. It is a preparation with excellent solubility. Thereby, it can be stably used with a 15% solution in an actual medical field. The pH when the dialysate is adjusted is 7.2 to 7.4.

As a packaging material for the solid preparation for single-agent bicarbonate dialysis obtained in this manner, a material having good moisture-proof performance and having a back electrode effect is preferable. There has been an example where a film was made by kneading an antistatic agent into a resin and then processed into a packaging material having an antistatic function, but foreign substances are mixed into the product due to the bleeding phenomenon from the resin. Inconvenience was seen. In contrast, in the present invention, since the antistatic agent is contained in the adhesive used for bonding the film, it does not penetrate the film, and the bleeding phenomenon cannot occur. The antistatic agent is a laminate film that is in the adhesive on the back side of the film surface in contact with the dialysis solid agent and has an antistatic function up to the back surface. That is, a film having a water vapor transmission rate (40 ° C., 90% RH) of 2.0 g / m ² · 24 hr or less, such as a silica vapor deposition film, is bonded using an antistatic adhesive such as Bondip (manufactured by Konishi). It is preferable to fill and package a dialysis solid agent in a packaging material having a back electrode effect processed using the laminated film. As a configuration example of a laminate film having such a laminated structure,
PET / SiO _X / Bondip / PE,
PVA / SiO _X / Bondip / PE,
ONY / SiO _X / Bondip / PE
PET / SiO _X / Bondip / CPP,
OPP / SiO _X / Bondip / CPP,
Which can be processed into a packaging material and used. The laminate film can be easily produced by a known method. As an example of the manufacturing method, measure the necessary amount of antistatic adhesive, mix with a solution such as diluting with a solvent if necessary, and use a coater such as a gravure coater or reverse coater. The method of apply | coating to said film, drying by warm air, and making it harden | cure can be mentioned. The obtained laminate film can be processed into a packaging material by heat sealing.

  Hereinafter, the present invention will be described more specifically with reference to examples.

[Example 1]
3500.0 g of sodium chloride, 85.9 g of potassium chloride, 127.1 g of calcium chloride, 271.3 g of sodium citrate, 498.5 g of glucose, and 1451.4 g of sodium bicarbonate were introduced into a stirring and mixing granulator and mixed and stirred. While mixing and stirring at a rotational speed of 70 rpm (shearing force 0.05 kW / kg), 77.4 g of glucose prepared beforehand and 58.6 g of magnesium chloride were dissolved in 32.2 g of purified water at an internal temperature of 45 ° C. A solution having a liquid temperature of 30 ° C. (viscosity: 0.2 Pa · s; measured with a B-type viscometer manufactured by Tokimec) was added. The contents that were in the form of wet particles immediately after the addition became free-flowing granules when mixed and stirred for 25 minutes. Once the granulated product was taken out and dried, 136.3 g of citric acid was added to the obtained granulated product and mixed. This was taken out and sized to obtain granular and fine granular preparations.

[Comparative Example 1]
3500.0 g of sodium chloride, 85.9 g of potassium chloride, 127.1 g of calcium chloride, 58.6 g of magnesium chloride, 271.3 g of sodium citrate, 575.9 g of glucose, and 1451.4 g of sodium bicarbonate were put into a stirring and mixing device. Mixed. Once the mixture was taken out and dried, 136.3 g of citric acid was added and mixed to obtain a mixture.

[Comparative Example 2]
3500.0 g of sodium chloride and 85.9 g of potassium chloride were added to a stirring and mixing apparatus and mixed. To this was added an aqueous solution prepared by dissolving 58.6 g of magnesium chloride and 127.1 g of calcium chloride dissolved in 64.5 g of purified water and mixed, and then 271.3 g of sodium citrate was further added and mixed. Next, this mixture was taken out, dried, and sieved to obtain a granulated product. The granulated product was mixed with 575.9 g of glucose, 136.3 g of citric acid and 1451.4 g of sodium bicarbonate to obtain a preparation.

[Comparative Example 3]
500.0 g of sodium chloride was put into a tumbling fluidized granulation dryer, and a mixed aqueous solution of 8.4 g of magnesium chloride and 18.2 g of calcium chloride was sprayed under the condition of an intake air temperature of 80 ° C. and dried simultaneously. Next, a mixed aqueous solution of 12.3 g of potassium chloride and 19.5 g of citric acid was sprayed and simultaneously dried. Next, 82.3 g of glucose and 207.3 g of sodium bicarbonate were mixed, and then an aqueous solution of 38.8 g of sodium citrate was sprayed and simultaneously dried. After the spraying was completed, the product was further dried and then cooled to obtain a preparation.

[Test Example 1]
A micrograph (manufactured by Keyence Corporation) of the preparation obtained in Example 1 is shown in FIG. From this figure, it can be seen that the present preparation obtained in Example 1 exists as a single particle or as an aggregate in which a plurality of each mother particle is bonded via a coating layer. Moreover, the structure of the coating layer of the same preparation by a scanning electron microscope (manufactured by Hitachi, Ltd.) is shown in FIG. From this figure, it can be confirmed that the coating layer of the preparation has an appearance as fused. Further, elemental analysis results (EDX) of the mother particles and the coating layer are shown in FIGS. 8 and 9, respectively. From FIG. 8, it was confirmed that sodium bicarbonate was present as the mother particle. In addition, when elemental analysis was performed on other mother particles, it was confirmed that sodium chloride, potassium chloride, sodium citrate, and glucose were present as mother particles.

  Moreover, it was confirmed from FIG. 9 that magnesium chloride, potassium chloride, etc. exist in a coating layer.

[Test Example 2]
The result of the thin film X-ray diffraction of the preparation obtained in Example 1 is shown in FIG.

  The measurement uses a thin film X-ray diffraction method to clarify the coating layer structure of the preparation, and analyzes the coating layer with a thin film X-ray diffractometer (CuKα; λ = 1.54058 mm, incident angle θ = 1 °). Went.

  A sample preparation method will be described. About 0.5 g of the sample was taken from the preparation of Example 1, and compression-molded into a disk having a uniform thickness using a tableting machine. The tableting pressure was such that the mother particles of the preparation were not crushed, the sample size was about 20 mm in diameter, and the thickness was about 2 mm.

  10 and 11, it can be seen that a peak was detected in the vicinity of 2θ = 10.1 ° in the coating layer of the preparation of Example 1. This peak indicates that the reaction product of calcium chloride and glucose is present in the coating layer.

[Test Example 3]
Each of the preparations of Example 1, Comparative Example 2, and Comparative Example 3 was filled in an aluminum packaging material, heat sealed, and then subjected to a stability test under conditions of 40 ° C. (75% RH). Observation and pH measurement were performed. The measurement results are shown in Table 1. From this result, it can be seen that this preparation is excellent in stability during storage. The measurement was performed using a Yokogawa pH meter.

[Test Example 4]
About 10 g of each of the preparations of Example 1, Comparative Example 1, Comparative Example 2 and Comparative Example 3 was placed in a petri dish and allowed to stand for 3 hours at 25 ° C. and 70% RH, and the weight increase due to moisture absorption before and after the test was measured. did. The measurement results are shown in Table 2. Moreover, the angle of repose of each of the preparations before and after drying in Example 1 and Comparative Example 1 was measured. Table 3 shows the measurement results. From these results, it can be seen that the present formulation has a low hygroscopic property and a small angle of repose before and after drying, and thus is a formulation with better stability and good fluidity.

[Test Example 5]
Samples were randomly sampled from the product obtained in Example 1, and 53.88 g of each specimen was dissolved in water to make exactly 1000 ml, and this was diluted 50 times to obtain Na ⁺ , K ⁺ , Mg ^2+. , Ca ²⁺ , HCO ₃ ⁻ , and Cl ⁻ were measured with an ion chromatograph manufactured by Tosoh Corporation. Similarly, citrate ions and glucose were measured by a liquid chromatograph manufactured by Tosoh Corporation. Table 4 shows the measurement results. Moreover, the same test was done also about the comparative example 1 and the comparative example 3. The measurement results are shown in Tables 5 and 6. This result shows that this formulation is excellent in content uniformity.

[Test Example 6]
The dissolution state when the preparation of Example 1 was dissolved at a concentration of 15% was visually confirmed. The results are shown in Table 7. Generally, the time required for hemodialysis is about 5 hours. From the test results, this preparation can be dissolved at a concentration of 15%, and can be stably used in a 15% solution in an actual medical field. I understand that.

  The present invention relates to a solid preparation for dialysis for preparing a bicarbonate dialysate used for dialysis therapy of patients with renal failure. Specifically, the surface of the mother particle, which is a particle serving as a mother nucleus during granulation, has a specific surface. It is a solid preparation for bicarbonate dialysis with a moisture-proof, stable, uniform content, fluidity, and solubility, covered with a fused coating layer containing salt. Extremely productive.

FIG. 1 is an image diagram showing a cross-sectional state of a solid agent according to the present invention, in which particles cannot be confirmed on the surface or inside at first glance. In the figure, 1 represents a coating layer and 2 represents a mother particle. FIG. 2 is an image view showing a cross-sectional state of the solid agent of the present invention, which can be confirmed to have particles on the surface and inside. In the figure, A indicates particles and B indicates a fusion layer. FIG. 3 is an image diagram showing a cross-sectional state of a solid agent of a manufacturing method according to the prior art that appears to have accumulated countless particles. In the figure, 1 'represents a deposited layer, 2' represents a mother particle, and C represents a particle. FIG. 4 is an image diagram showing the meaning of “fused” in the present invention. FIG. 5 is an image showing the significance of “deposition” in the prior art. In the figure, D represents a binder. FIG. 6 is a micrograph of the preparation obtained in Example 1 (digital photograph). FIG. 7 is a scanning electron micrograph of the cross section of the preparation obtained in Example 1 (digital photograph). FIG. 8 shows the elemental analysis results (energy dispersive X-ray analyzer (EDX)) of the mother particles of the solid preparation for single-agent bicarbonate dialysis obtained in Example 1. FIG. 9 shows the elemental analysis results (energy dispersive X-ray analyzer (EDX)) of the coating layer of the solid preparation for single-agent bicarbonate dialysis obtained in Example 1. FIG. 10 shows the results of thin film X-ray diffraction of the solid preparation for single-agent bicarbonate dialysis obtained in Example 1 (2θ = 2 to 60 °). FIG. 11 shows the results of thin film X-ray diffraction of the solid preparation for single-agent bicarbonate dialysis obtained in Example 1 (2θ = 2 to 20 °).

Explanation of symbols

1: Coating layer 1 ′: Deposited layer 2: Mother particle 2 ′: Mother particle A: Particle B: Fusion layer C: Particle D: Binder

Claims (5)

A method for producing a solid preparation for bicarbonate dialysis containing sodium chloride, potassium chloride, calcium chloride, magnesium chloride, citrate, citric acid, a pH adjuster , glucose and sodium bicarbonate as raw materials. A method comprising the steps of [1] to [4]:
[1] Add a solution containing glucose and magnesium chloride to powder and / or granules containing sodium bicarbonate, sodium chloride, potassium chloride, citrate and glucose , and stir and mix at a temperature of 55 ° C or lower To obtain a mixture (wherein calcium chloride is contained in one or both of powder and / or granule or solution );
[2] Granulate and / or fine granulated by stirring and granulating the mixture of step [1] for 1 minute or more at a temperature of 55 ° C. or less under a shearing force of 0.003 kW / kg or more per 1 kg of the mixture Obtaining a product;
[3] a step of drying the granulated product of step [2]; and [4] a step of mixing the granulated product of step [2] with a pH adjusting agent before or after step [3]. The viscosity of the dissolution liquid is 0.001~2Pa · s, the production method of the one-component type bicarbonate dialysis solid preparation according to claim 1, wherein. The solid for one-pack type bicarbonate dialysis according to claim 1 or 2 , wherein the amount of water or water in the solution is 0.05 to 5.0% by weight of the weight of the powder and / or granules. Manufacturing method. The method for producing a solid preparation for single-agent bicarbonate dialysis according to any one of claims 1 to 3 , wherein the solution is an aqueous solution containing glucose and magnesium chloride. A solid preparation for one-pack type bicarbonate dialysis obtained by the production method according to any one of claims 1 to 4 .