JP6741209B2 - Filter assembly - Google Patents

Description

The present invention relates to a filter assembly for use with the interposition between the female connector and the infusion set of the infusion container.

Infusion therapy is known in which an infusion containing water, nutrition, etc. is administered to a patient through a vein. A drug may be mixed in the infusion solution for the purpose of treating a disease. The infusion solution to be administered to a patient is generally prepared in an infusion container. Then, one end (upstream end) of the infusion set including the flexible tube is connected to the female connector (port) of the infusion container. The needle at the other end (downstream end) of the infusion set is punctured into the vein of the patient. Then, the infusion solution in the infusion container is administered to the patient via the infusion set.

The female connector of the infusion container is usually provided with a rubber stopper. In order to take out the infusion solution from the infusion solution container via the female connector, it is necessary to puncture the rubber stopper with a puncture needle (sometimes called a “bottle needle”) having a sharp tip. Therefore, in the infusion therapy, an infusion set in which the puncture needle is provided at the upstream end may be used.

However, simply puncturing the rubber stopper with the puncture needle may cause the puncture needle to unintentionally fall out of the rubber stopper when tension is applied to the infusion set. In that case, the infusion may leak to the outside world.

A dangerous drug designated as a powerful drug such as some anticancer drugs may be mixed in the infusion solution. In such a case, it is necessary to avoid a situation where an infusion solution containing a dangerous drug leaks out and adheres to a worker's finger or the like, or the worker inhales the vapor.

Therefore, it is necessary to prevent the female connector of the infusion container and the infusion set from being unintentionally separated. FIG. 15 is an exploded perspective view of a configuration example of a conventional infusion therapy therefor.

The infusion solution to be administered to the patient is stored in the infusion solution container 700. A female connector 710 is provided at the lower end of the infusion container 700. The opening of the female connector 710 is sealed with a rubber plug (not visible in FIG. 15).

An adapter 900 (see Patent Document 1) is connected to the female connector 710. The adapter 900 includes a puncture needle 961 having a sharp tip and a mixed injection port 910. Four substantially “U”-shaped arms 970 extend substantially parallel to the puncture needle 961. An engaging claw 980 projects from the tip of each arm 970 toward the puncture needle 961. A flow path communicating with the mixed injection port 910 is formed in the puncture needle 961. The mixed injection port 910 includes a partition member (valve body, hereinafter referred to as “septum”) made of an elastic material such as rubber. At the center of the septum, a linear slit (cut) is formed to penetrate the septum in the thickness direction.

The infusion set 800 has a flexible tube 801 for flowing an infusion. A male connector 810 (see Patent Document 2) is provided at the upstream end of the tube 801. The male connector 810 includes a cylindrical male luer and a cylindrical hood 820 surrounding the male luer. The hood 820 is formed with a substantially “U”-shaped notch that penetrates the hood 820 in the radial direction. As a result, the lock lever 830 having a cantilever support structure surrounded by the cutout faces the male luer. A lock claw projects from the free end of the lock lever 830 toward the male luer.

On the tube 801, a drip cylinder 803 for visualizing the flow of the infusion solution and a clamp 805 for adjusting the flow rate of the infusion solution flowing in the tube 801 are provided. Although not shown, a filter for filtering the infusion solution may be provided on the tube 801. At the downstream end of the tube 801, a needle (not shown) that punctures the vein of the patient is provided.

A method of administering an infusion solution using the adapter 900 and the infusion solution set 800 is roughly as follows.

First, the infusion container 700 is prepared. An infusion solution containing an electrolyte, a nutrient, and the like is stored in the infusion solution container 700.

Next, the adapter 900 is attached to the female connector 710. The puncture needle 961 of the adapter 900 punctures the rubber plug of the female connector 710. The infusion container 700 and the mixed injection port 910 communicate with each other via the flow path inside the puncture needle 961. Since the septum slit is closed, the liquid in the infusion container 700 does not leak from the mixed injection port 910. The engaging claw 980 of the adapter 900 engages with the female connector 710.

Then, the drug is injected into the infusion container 700 via the adapter 900. For example, the tip of the syringe can be connected to the mixed injection port 910 to inject the drug solution into the infusion container. Thus, the infusion solution is prepared in the infusion solution container 700. The above-mentioned work is generally performed by a pharmacist.

The infusion solution container 700 in which the prepared infusion solution is stored is carried to a patient's room. In the hospital room, a nurse connects the male connector 810 of the infusion set 800 to the mixed injection port 910. The male luer of the male connector 810 is inserted into the septum slit of the mixed injection port 910. The mixed injection port 910 is inserted into the hood 820 of the male connector 810. The lock claw of the male connector 810 engages with the mixed injection port 910.

Next, a needle provided at the downstream end of the infusion set 800 is punctured into the vein of the patient, and the infusion in the infusion container 700 is administered to the patient via the infusion set 800.

Thus, in the configuration of FIG. 15, the engagement claw 980 of the adapter 900 engages with the female connector 710, and the lock claw of the male connector 810 engages with the mixed injection port 910. Thereby, for example, even if tension is applied between the infusion container 700 and the infusion set 800, the female connector 710 and the adapter 900, and the adapter 900 and the male connector 810 are not unintentionally separated.

JP, 2014-079355, A International publication 2013/154050 pamphlet JP, 2012-254142, A JP, 2013-165830, A JP, 2004-000483, A

Some drugs administered to patients crystallize during infusion. When administering an infusion solution containing such a drug to a patient, it is necessary to administer the infusion solution to a patient after filtering the infusion solution in order to remove crystals of the drug. Further, when the puncture needle 961 is punctured in the rubber plug of the female connector 710, foreign matter such as a rubber piece generated by scraping off the rubber plug by the puncture needle 961 (generally called coring) is mixed into the infusion container 700. Sometimes. In order to remove such foreign matter, the infusion solution may be filtered with a filter. When the infusion solution is filtered with a filter, the infusion set in which a filter is provided on the tube 801 is used as the infusion set 800.

On the other hand, depending on the type of drug, the administration method, etc., it may not be desirable or necessary to heal the infusion solution with a filter. This is because a trace amount of the drug may be adsorbed on the filter or may remain in the housing of the filter. Further, from the viewpoint of cost reduction, the use of filters may be omitted. In these cases, an infusion set having no filter is used as the infusion set 800.

Therefore, there are two types of infusion set 800, one with a filter and one without a filter. When administering an infusion solution to a patient, the nurse needs to select one of two types of infusion set with or without a filter and connect it to the adapter 900 according to the type of medicine contained in the infusion solution. There is.

However, nurses are not involved in infusion preparation. In addition, it may happen that it is not possible to spend sufficient time to determine the necessity of the filter due to urgent treatment or work. Therefore, there is a possibility that the nurse makes a mistake in selecting the infusion set regarding the necessity of the filter.

A first object of the present invention is to reduce the number of types of infusion sets and prevent erroneous selection of infusion sets. A second object of the present invention is to reduce the possibility that the infusion solution will leak to the outside world.

The filter assembly of the present invention is used to connect an infusion container and an infusion set. The filter assembly includes an adapter and a filter. The adapter is an adapter body connectable to a female connector of the infusion container, and includes a puncture needle that punctures a rubber plug that seals the opening of the female connector, and an engagement mechanism that engages the female connector. It is a second mixed injection port capable of connecting the adapter main body that it has with a male connector provided at the upstream end of the infusion set, and a self-closing valve body and a locking mechanism of the male connector can be engaged. And a second mixed injection port communicating with the puncture needle. The filter is a luer connector that can be connected to the second mixed injection port, the luer connector having an engaging portion that engages with the engagement structure of the second mixed injection port, and the upstream of the infusion set. a first mixture injection port capable of connecting a male connector provided at the side end, the valve body of the self-closing, and first mixed injection of the male connector locking mechanism with an engaging engagement structure and ports, are disposed between the luer connector and the first mixture injection port, and a filter body in communication with said luer connector and said first mixture injection port. The adapter and the filter are provided as separate parts. Once the engaging portion of the luer connector is engaged with the engaging structure of the second mixed injection port to connect the luer connector to the second mixed injection port, the second mixed injection port and the luer connector are connected to each other. Cannot be separated.

Filter assembly of the present invention comprises a filter body having a function of filtering the infusion. The pharmacist who prepares the infusion solution determines whether or not the filter body is attached to the infusion container according to the composition of the infusion solution. The nurse may connect the infusion set without a filter to the mixed injection port attached to the end of the infusion container without checking whether the filter body is attached to the infusion container. Therefore, the possibility of erroneous selection of the infusion set is low.

Further, in the present invention, since an infusion set with a filter is unnecessary, it is possible to reduce the number of types of infusion sets used for infusion therapy.

When the infusion container and the infusion set are connected via the filter assembly of the present invention, since the connected members engage each other, even if a tensile force is applied between the infusion container and the infusion set, The connection will not come off unintentionally. Moreover, since the mixed injection port has a self-closing valve body, the infusion solution does not leak from the mixed injection port in the non-connection state. Therefore, it is unlikely that the infusion solution leaks to the outside world.

FIG. 1 is an exploded perspective view showing the configuration of infusion therapy using the filter assembly according to the first embodiment of the present invention. FIG. 2A is a perspective view of the filter according to the first exemplary embodiment of the present invention viewed from one direction. FIG. 2B is a perspective view of the filter according to the first exemplary embodiment of the present invention viewed from another direction. FIG. 2C is a cross-sectional perspective view of the filter according to the first exemplary embodiment of the present invention. FIG. 3A is a perspective view of the adapter according to the first exemplary embodiment of the present invention viewed from one direction. FIG. 3B is a perspective view of the adapter according to the first exemplary embodiment of the present invention viewed from another direction. FIG. 3C is a sectional perspective view of the adapter according to the first exemplary embodiment of the present invention. FIG. 4 is a cross-sectional perspective view showing a state in which the adapter according to the first embodiment of the present invention is connected to the female connector of the infusion container. FIG. 5A is a perspective view showing a state in which the adapter and the filter according to the first exemplary embodiment of the present invention are connected to the female connector of the infusion container. FIG. 5B is a cross-sectional perspective view showing a state in which the adapter and the filter according to the first exemplary embodiment of the present invention are connected to the female connector of the infusion container. FIG. 6A is a perspective view of a male connector provided in the infusion set. FIG. 6B is a cross-sectional perspective view of the male connector. FIG. 6C is a cross-sectional perspective view of the male connector viewed from another direction. FIG. 7A is a perspective view of the filter assembly according to the first embodiment of the present invention, which connects the female connector of the infusion container and the male connector of the infusion set. FIG. 7B is a cross-sectional perspective view of the filter assembly according to the first embodiment of the present invention, which connects the female connector of the infusion container and the male connector of the infusion set. FIG. 8 is a front view showing a state in which the female connector of the infusion container and the infusion set are connected via the adapter and the filter in the first embodiment of the present invention. FIG. 9 is a front view showing a state in which the female connector of the infusion container and the infusion set are connected via only the adapter in the first embodiment of the present invention. FIG. 10 is an exploded perspective view showing the configuration of infusion therapy using the filter assembly according to the second embodiment of the present invention. FIG. 11A is a perspective view of the filter according to the second exemplary embodiment of the present invention viewed from one direction. FIG. 11B is a perspective view of the filter according to the second exemplary embodiment of the present invention viewed from another direction. FIG. 11C is a cross-sectional perspective view of the filter according to the second exemplary embodiment of the present invention. FIG. 12A is a perspective view showing a state where the filter assembly according to the second exemplary embodiment of the present invention is connected to the female connector of the infusion container. FIG. 12B is a cross-sectional perspective view showing a state in which the filter assembly according to the second embodiment of the present invention is connected to the female connector of the infusion container. FIG. 13 is a cross-sectional perspective view of the filter assembly according to the second embodiment of the present invention, which connects the female connector of the infusion container and the male connector of the infusion set. FIG. 14 is a front view showing a state in which the female connector of the infusion container and the infusion set are connected via the filter assembly according to the second embodiment of the present invention. FIG. 15 is an exploded perspective view showing an example of the configuration of conventional infusion therapy.

In the filter assembly of the invention described above, a filter having the filter body and the first mixture injection port, the adapter having the adapter body may be provided as a separate part. The adapter may include a second mixed injection port in communication with the puncture needle. The second mixed injection port includes a self-closing valve body and an engagement structure with which a locking mechanism of the male connector can be engaged, and the male connector can be connected to the second mixed injection port. The filter may include a luer connector in communication with the filter body. The luer connector may include an engaging portion that engages with the engaging structure of the second mixed injection port. The luer connector can be connected to the second mixed injection port. According to the filter assembly of the present invention thus configured, the filter and the adapter are separate parts, so that the pharmacist only needs to connect the filter to the adapter when it is necessary to filter the infusion solution.

In the above, once the engaging portion of the luer connector is engaged with the engaging structure of the second mixed injection port to connect the luer connector to the second mixed injection port, the second mixed injection port and the lure are connected. It is preferable that the connector cannot be separated. According to such a preferable configuration, if the pharmacist connects the filter to the adapter, the filter is not removed thereafter, so that the infusion to be filtered is accidentally administered to the patient without being filtered. Can be prevented.

It is preferable that the first mixed injection port and the second mixed injection port are compatible with each other. According to this preferable configuration, the male connector of the infusion set can be connected to both the first mixed injection port and the second mixed injection port in exactly the same manner.

Hereinafter, the present invention will be described in detail with reference to preferred embodiments. However, it goes without saying that the present invention is not limited to the following embodiments. Each drawing referred to in the following description is a simplified view of main members constituting an embodiment of the present invention for convenience of description. Accordingly, the present invention may include any member not shown in the figures below. Further, within the scope of the present invention, each member shown in each of the following drawings may be changed or omitted. In the drawings referred to in the following description, the same members as those forming the conventional infusion therapy (see FIG. 15) are designated by the same reference numerals.

(Embodiment 1)
1. Configuration of Filter Assembly Fig. 1 is an exploded perspective view showing a configuration of infusion therapy using the filter assembly 1 according to the first embodiment of the present invention. The filter assembly 1 includes an adapter 11 and a filter 12, which are separate and independent parts. The female connector 710 of the infusion container 700 and the male connector 810 of the infusion set 800 are connected via the adapter 11 (and the filter 12 as necessary).

2A is a perspective view seen from one direction of the filter 12, FIG. 2B is a perspective view seen from another direction, and FIG. 2C is a sectional perspective view thereof.

The filter 12 includes a mixed injection port (first mixed injection port) 110 involved in connection with the male connector 810 (see FIG. 1) of the infusion set 800, a filter body 140, and a luer connector 150 involved in connection with the adapter 11. Equipped with.

As best shown in FIG. 2C, the first mixed injection port 110 includes a tubular portion 111 having a substantially cylindrical shape, a septum (partition wall member) 120 provided at the tip of the tubular portion 111, and a septum 120. And a cap 130 overlaid.

An annular protrusion 113 and a pair of protrusions 116 (see FIG. 2B) project outward from the outer peripheral surface of the tubular portion 111. The annular protrusion 113 is slightly separated from the protrusion 116 on the proximal end side (filter body 140 side). The annular protrusion 113 is a protrusion that is continuous in the circumferential direction. An annular groove 114 continuous in the circumferential direction is provided on the base end side of the annular protrusion 113.

The septum 120 is a thin plate made of an elastic material such as rubber and having a circular plan view shape. At the center of the septum 120, a linear slit (cut) 121 penetrating the septum 120 in the thickness direction is formed.

As shown in FIG. 2B, the cap 130 includes a top plate 131 having a disc shape, and a peripheral wall 135 having a cylindrical shape extending from the outer peripheral edge 133 of the top plate 131. A circular opening (through hole) 132 is formed in the center of the top plate 131. A pair of holes 136 is formed in the peripheral wall 135. The hole 136 is a through hole that penetrates the peripheral wall 135 in the radial direction.

As can be understood from FIG. 2C, the septum 120 is attached to the tip of the tubular portion 111, and the cap 130 is attached to the tubular portion 111 so as to cover the septum 120. The protrusion 116 protruding from the outer peripheral surface of the tubular portion 111 is fitted into the hole 136 provided in the peripheral wall 135 of the cap 130, and the protrusion 116 and the edge of the hole 136 are engaged with each other (see FIG. 2B). The septum 120 is sandwiched in the thickness direction by the tip of the tubular portion 111 and the top plate 131 of the cap 130. The slit 121 of the septum 120 is exposed in the opening 132 of the cap 130 (see FIG. 2B). The annular protrusion 113 formed on the tubular portion 111 is adjacent to the peripheral wall 135 of the cap 130. The top surface of the annular protrusion 113 forms a cylindrical surface that is substantially the same as the outer peripheral surface of the peripheral wall 135.

The first mixed injection port 110 can be connected to a male connector 810 (see FIGS. 6A to 6C described later) of the infusion set 800. The cylindrical male luer 811 of the male connector 810 is inserted into the slit 121 of the septum 120. The annular protrusion 113 functions as an engagement structure with which the lock claw (lock mechanism) 832 of the male connector 810 is engaged. When the operation arm 835 of the male connector 810 is operated to release the engagement between the annular protrusion 113 and the lock claw 832, the male connector 810 can be separated from the first mixed injection port 110. When the male luer 811 is pulled out from the septum 120, the septum 120 immediately returns to the initial state, and the slit 121 is liquid-tightly closed. In this way, the septum 120 functions as a self-closing valve body. The self-closing mixed injection port 110 including such a septum 120 is also called a "needleless port". The first mixed injection port 110 may be the same as or compatible with the mixed injection port 910 (see FIG. 15) provided in the conventional adapter 900.

As best shown in FIG. 2C, the luer connector 150 includes a rod-shaped male luer 151 and an outer cylinder 155 surrounding the male luer 151.

The outer peripheral surface of the male luer 151 is a tapered surface (so-called male tapered surface) whose outer diameter decreases as it approaches the tip. However, the outer peripheral surface of the male luer 151 is not limited to this, and may be, for example, a cylindrical surface whose outer diameter is constant in the longitudinal direction, or an arbitrary curved surface whose outer diameter changes depending on the position in the longitudinal direction. May be.

A channel 152 is formed in the male luer 151 along the longitudinal direction thereof. The flow path 152 is open at the tip of the male luer 151.

The outer cylinder 155 has a cylindrical shape coaxial with the male luer 151. The inner diameter of the inner peripheral surface (the surface facing the male luer 151) of the outer cylinder 155 is equal to the outer diameter of the cap 130′ and the annular projection 113′ of the second mixed injection port 110′ (see FIG. 3B), which will be described below. The same as the outer diameters of the cap 130 and the annular projection 113 of the mixed injection port 110). A pair of engagement protrusions (engagement portions) 156 protrude from the inner peripheral surface of the outer cylinder 155 toward the male luer 151. The engagement protrusion 156 has an inclined surface 157 at an end opposite to the filter body 140, which is inclined so as to be separated from the male luer 151 as the distance from the filter body 140 increases. The outer cylinder 155 is formed with a pair of slit-shaped notches 158 having a predetermined depth from the tip thereof toward the filter body 140. In the present embodiment, each of the engagement protrusion 156 and the notch 158 is provided in two pieces, but the number of these may be one or three or more. The engagement protrusion 156 may be circumferentially continuous (excluding the notch 158) so as to surround the male luer 151. The cutout 158 may be omitted.

The filter body 140 is arranged between the first mixed injection port 110 and the luer connector 150. The filter body 140 has a filter chamber 141 that communicates with the inner cavity 112 of the first mixed injection port 110 and the flow path 152 of the male luer 151 of the luer connector 150. Although not shown, the filter chamber 141 contains a filtering unit for filtering the infusion solution. The infusion solution that has flowed into the filter chamber 141 from the flow path 152 of the male luer 151 passes through the filtering portion and then flows into the lumen 112 of the first mixed injection port 110. The filtering unit removes foreign matters (for example, suspended matters, precipitates, bacteria, fungi, etc.) and air bubbles in the infusion solution when the infusion solution passes through the filtration unit. There is no limitation on the configuration of the filtering unit, and for example, it may be the same as a known filter provided in the infusion set. For example, a hollow fiber membrane filter made of polyether sulfone can be used, but other materials and shapes may be used. In the present embodiment, the filter chamber 141 has a hollow cylindrical shape, but the filter chamber 141 may have any shape.

The part of the filter 12 excluding the septum 120, the cap 130, and the filtration part (hereinafter referred to as “filter housing”) is preferably made of a hard material, and there is no limitation, but examples thereof include polycarbonate, polypropylene, polyacetal, polyamide, and hard poly. Resin materials such as vinyl chloride, polyethylene, styrene ethylene, polyethylene terephthalate, polybutylene terephthalate and butylene styrene block copolymer can be used. In the present embodiment, the filter housing is manufactured by separately forming (for example, injection molding) the first mixed injection port 110, the filter body 140, and the luer connector 150, and then joining them in a liquid-tight manner. However, the manufacturing method of the filter housing is not limited to this. The number of parts constituting the filter housing is not limited to three in this embodiment, and may be smaller or larger than this. A part of the components forming the filter housing may be made of a material different from that of the other components.

The entire filter housing does not have to be integrated using a hard material. For example, the first mixed injection port 110 and the filter body 140 may be communicated with each other via a flexible tube. Similarly, the filter body 140 and the luer connector 150 may be communicated with each other via a flexible tube.

The material of the cap 130 is not limited, but is preferably a hard material, and for example, a resin material such as polycarbonate, polypropylene, polyacetal, polyamide, hard polyvinyl chloride, or polyethylene can be used.

The material of the septum 120 is not limited, but is preferably a soft material having rubber elasticity. For example, a rubber material such as isoprene rubber, silicone rubber, butyl rubber, or a thermoplastic elastomer can be used.

3A is a perspective view seen from one direction of the adapter 11, FIG. 3B is a perspective view seen from another direction, and FIG. 3C is a sectional perspective view thereof.

The adapter 11 is a mixed injection port involved in connection between the adapter body 160 involved in connection with the female connector 710 (see FIG. 1) and the filter 12 (see FIG. 1) or the male connector 810 (see FIGS. 6A to 6C). (Second mixed injection port) 110 ′.

Adapter body 160 includes puncture needle 161, four substantially “U”-shaped arms 170 facing puncture needle 161, and engagement claws (engagement mechanism) 180 protruding from each arm 170 toward puncture needle 161. With.

The puncture needle 161 has a sharp tip so that the rubber plug 715 of the female connector 710 can be punctured. A flow path 162 through which the infusion solution flows is formed inside the puncture needle 161 along the longitudinal direction of the puncture needle 161. Two lateral holes 163 penetrating the puncture needle 161 in the diametrical direction are formed in a tapered portion near the tip of the puncture needle 161. The lateral hole 163 communicates with the flow path 162.

A substrate 165 is provided at the base of the puncture needle 161. The substrate 165 is a thin plate along a direction (hereinafter referred to as “radial direction”) orthogonal to the longitudinal direction of the puncture needle 161. Four arms 170 extend from the outer peripheral edge of the substrate 165 to the same side as the puncture needle 161. Each arm 170 includes a pair of elastic portions 171 extending from the substrate 165 and a bridge portion 172 connecting the tips of the pair of elastic portions 171, and has a substantially “U” shape as a whole. The arms 170 are arranged at equal angular intervals with respect to the puncture needle 161 so as to surround the puncture needle 161. The arms 170 adjacent to each other in the circumferential direction are separated by a slit 175. The slit 175 extends to the substrate 165.

An engaging claw 180 is provided on the bridge portion 172 of the arm 170. The engagement claw 180 projects from the surface of the bridge portion 172 facing the puncture needle 161 toward the puncture needle 161. The engaging claw 180 is provided with a sliding surface 183 on the side opposite to the substrate 165 with respect to the top 181 closest to the puncture needle 161. The sliding surface 183 is inclined so as to approach the substrate 165 as it approaches the puncture needle 161.

The arm 170 has a cantilevered support structure having a fixed end at a portion connected to the substrate 165. The elastic portion 171 is a thin rod-shaped member and can be elastically bent and deformed relatively easily. Therefore, the arm 170 can elastically deform in a direction in which the claw 180 moves away from the puncture needle 161. Since the slits 175 are provided between the adjacent arms 170, each arm 170 can be deformed independently of each other.

The number of arms 170 does not have to be four and may be more or less. The elastic portion 171 does not have to extend parallel to the puncture needle 161, and may be inclined so as to be separated from the puncture needle 161 as it is separated from the substrate 165, for example. The shape of the arm 170 does not need to be a substantially “U” shape, and may be, for example, a thin plate shape (a strip shape) having a cantilever support structure.

The second mixed injection port 110 ′ has substantially the same configuration as the first mixed injection port 110 (see FIGS. 2A to 2C) provided on the filter 12. That is, the first mixed injection port 110 and the second mixed injection port 110' are compatible with each other. In order to make it easier to understand the correspondence between the members forming the first mixed injection port 110 and the members forming the second mixed injection port 110′, the members forming the second mixed injection port 110′ include the first mixed injection port 110′. The reference numeral of the corresponding member is attached with the reference numeral "'" (dash). The members of the second mixed injection port 110' labeled with a "'" are the same as the members of the first mixed injection port 110 labeled with the same reference without a "'". To avoid redundant description, detailed description of the second mixed injection port 110' is omitted. The description of the first mixed injection port 110 applies similarly to the second mixed injection port 110'.

The part of the adapter 11 excluding the septum 120' and the cap 130' is preferably integrally manufactured as one part by injection molding a resin material. Resin materials that can be used include, but are not limited to, polyethylene, polypropylene, polycarbonate, styrene ethylene, polyethylene terephthalate, polybutylene terephthalate, butylene styrene block copolymer, and the like, but are used for medical purposes and arms. Considering that 170 is elastically bent and deformed, a polyolefin resin such as polyethylene or polypropylene is preferable.

The adapter 11 may be the same as the conventional adapter 900 (see FIG. 15).

2. Method of Using Filter Assembly The filter assembly 1 is used to connect the infusion container 700 and the infusion set 800, as shown in FIG. Below, the usage method of the filter assembly 1 is demonstrated.

First, an infusion container 700 in which an infusion solution containing an arbitrary component such as an electrolyte and a nutrient is stored is prepared. The liquid transfusing container 700 is a bag-shaped material in which flexible sheets are bonded together. A female connector 710 is attached to the infusion container 700.

Next, the puncture needle 161 of the adapter 11 is opposed to the female connector 710. Then, the female connector 710 is inserted into the space surrounded by the four arms 170 of the adapter 11. The slanted sliding surface 183 of the engaging claw 180 (see FIGS. 3A to 3C) collides with the female connector 710, and the arm 170 appropriately elastically deforms in a direction in which the engaging claw 180 moves away from the puncture needle 161. When the adapter 11 is strongly pressed toward the female connector 710, the puncture needle 161 punctures the rubber plug of the female connector.

FIG. 4 is a sectional perspective view showing a state in which the adapter 11 is connected to the female connector 710. The puncture needle 161 penetrates the rubber plug 715 that seals the opening of the female connector 710. A lateral hole 163 provided near the tip of the puncture needle 161 passes through the rubber stopper 715 and is exposed on the infusion container 700 side. Therefore, the infusion container 700 and the inner cavity 112 ′ of the second mixed injection port 110 ′ communicate with each other via the flow path 162 of the puncture needle 161. Since the slit 121' of the septum 120' is closed, the infusion solution in the infusion solution container 700 does not leak to the outside through the slit 121'.

The elastic portion 171 of the arm 170 is appropriately elastically bent and deformed according to the outer diameter of the female connector 710. The engaging claw 180 is engaged with the enlarged cylindrical portion 711 of the female connector 710. Therefore, even if an external force (for example, a pulling force for separating the female connector 710 and the adapter 11) or vibration is applied to the female connector 710 and the adapter 11, the puncture needle 161 is unintentionally pulled out from the rubber plug 715. There is no. The adapter 11 can be separated from the female connector 710 by putting a finger on the bridging portion 172 of the arm 170 to release the engagement between the engagement claw 180 and the large diameter portion 711.

In the state of FIG. 4, the medicine is injected into the infusion container 700 through the second mixed injection port 110'. For example, the tip of the syringe can be inserted into the slit 121 ′ of the septum 120 ′ to inject the drug solution containing the drug into the infusion container 700. When the barrel tip of the syringe is pulled out from the septum 120', the slit 121' immediately returns to the initial state and is liquid-tightly closed. The liquid medicine may be injected through the rubber plug 715 of the female connector 710 before attaching the adapter 11 to the female connector 710 (see Embodiment 2 described later).

Next, the luer connector 150 (see FIG. 1) of the filter 12 is connected to the second mixed injection port 110'. The connection can be made by inserting the second mixed injection port 110 ′ into the outer cylinder 155 of the luer connector 150 and pushing it.

5A is a perspective view showing a state where the filter 12 is connected to the adapter 11, and FIG. 5B is a sectional perspective view thereof.

As can be understood from FIG. 5B, when the second mixed injection port 110 ′ is inserted into the luer connector 150, the outer peripheral edge 133 ′ (see FIG. 3B) of the top plate 131 ′ of the cap 130 ′ is aligned with the inner periphery of the outer cylinder 155. It collides with the inclined surface 157 (see FIG. 2C) of the engaging projection 156 protruding from the surface. When the second mixed injection port 110 ′ is further pushed into the luer connector 150, the outer peripheral edge 133 ′ slides on the inclined surface 157 while the engaging protrusion 156 elastically moves the outer cylinder 155 in a direction away from the male luer 151. Transform into. The notch 158 provided in the outer cylinder 155 facilitates the deformation of the outer cylinder 155, so that the second mixed injection port 110 ′ can be easily inserted into the luer connector 150. When the engagement protrusion 156 has finished passing through the annular protrusion 113' of the second mixed injection port 110', the outer cylinder 155 returns to the initial shape, and the engagement protrusion 156 is fitted into the groove 114'. Thus, the engagement protrusion 156 engages the annular protrusion 113'. In this way, simply pressing the second mixed injection port 110 ′ into the luer connector 150 completes the connection between the two. The engagement between the engagement protrusion 156 and the annular protrusion 113' cannot be released by merely applying the opposite forces to the filter 12 and the adapter 11.

As shown in FIG. 5A, when the engagement protrusion 156 is engaged with the annular protrusion 113, the tip of the outer cylinder 155 abuts or approaches the substrate 165 of the adapter 11. Therefore, it is not possible to release the engagement between the engagement protrusion 156 and the annular protrusion 113 ′ by hooking a finger or a claw on the tip of the outer cylinder 155 to deform the outer cylinder 155 outward.

That is, as shown in FIGS. 5A and 5B, once the luer connector 150 is connected to the second mixed injection port 110', it is extremely difficult to separate the two.

As shown in FIG. 5B, the male luer 151 of the luer connector 150 penetrates the slit 121′ of the septum 120′, and the tip of the male luer 151 reaches into the lumen 112′ of the second mixed injection port 110′. .. Therefore, the second mixed injection port 110 ′ and the filter 12 communicate with each other. Since the slit 121 of the septum 120 of the first mixed injection port 110 is closed, even if the infusion solution in the infusion solution container 700 flows into the inner cavity 112 of the first mixed injection port 110, the infusion solution passes through the slit 121 to the outside. It does not leak.

The above operation is generally performed by a pharmacist. As shown in FIGS. 5A and 5B, the infusion container 700 in which the filter assembly 1 of the present embodiment is connected to the female connector 710 is carried to the patient's room.

In the hospital room, the nurse performs the following operations.

First, the male connector 810 of the infusion set 800 is connected to the first mixed injection port 110.

The male connector 810 will be described. 6A is a perspective view of the male connector 810, and FIGS. 6B and 6C are cross-sectional perspective views thereof.

A male luer 811 and a hood 820 are provided on a substantially circular substrate 819. The male luer 811 is a rod-shaped member. A channel 812 is formed in the male luer 811 along the longitudinal direction thereof. A lateral hole 813 radially penetrates the male luer 811 near the tip of the male luer 811. The lateral hole 813 communicates with the flow path 812.

A tubular portion 815 is provided on the side of the substrate 819 opposite to the male luer 811. The tubular portion 815 has a hollow cylindrical shape that is coaxial with the male luer 811 and communicates with the flow path 812 of the male luer 811. The tube 801 of the infusion set 800 is connected to the tubular portion 815 (see FIG. 1). In the present embodiment, the tubular portion 815 and the tube 801 are connected via the hard connecting tube 802 (see FIG. 7B described later). However, the tubular portion 815 and the tube 801 may be connected via any member other than the connection tube 802, or may be directly connected.

The hood 820 has a hollow cylindrical shape that is coaxial with the male lure 811, and surrounds the male lure 811. The inner diameter of the inner peripheral surface of the hood 820 (the surface facing the male luer 10) is equal to the outer diameter of the cap 130 of the first mixed injection port 110 and the annular protrusion 113 (this is the cap 130′ and the annular protrusion of the second mixed injection port 110′). (It is the same as the outer diameter of 113') or slightly larger than this.

The hood 820 is formed with a substantially “U”-shaped slit 822. The slit 822 is a hole that penetrates the hood 820 in the radial direction. As a result, the lock lever 830 surrounded by the slit 822 is formed. The lock lever 830 faces the male lure 811 and extends substantially parallel to the male lure 811. The lock lever 830 has a cantilever support structure in which the end on the substrate 819 side is a fixed end and the opposite end is a free end. A lock claw (lock mechanism) 832 projects from the tip (free end) of the lock lever 830 toward the male luer 811. The lock claw 832 has an inclined surface 833 at an end opposite to the base plate 819 so as to be separated from the male luer 811 as the base plate 819 is separated. An operation arm 835 is provided on the surface of the lock lever 830 opposite to the male luer 811. The operation arm 835 extends downward beyond the substrate 819 so as to face the tubular portion 815. An operation unit 836 is provided at the tip of the operation arm 835. When the operating portion 836 is pushed toward the tubular portion 815, the lock lever 830 is elastically bent and deformed, and the lock claw 832 is displaced away from the male luer 811.

Although not shown, the male connector 810 may include a flexible cover (see, for example, Patent Documents 3 and 4) that covers the tip of the male luer 811. When the male connector 810 is connected to the mixed injection ports 110 and 110', the cover is compressed and deformed in the longitudinal direction of the male luer 811, and the male luer 811 penetrates the cover.

The connection between the first mixed injection port 110 and the male connector 810 can be performed by inserting the first mixed injection port 110 into the hood 820 of the male connector 810 and further pushing.

FIG. 7A is a perspective view showing a state where the male connector 810 of the infusion set 800 is connected to the filter 12, and FIG. 7B is a sectional perspective view thereof.

As can be understood from FIG. 7B, when the first mixed injection port 110 is inserted into the hood 820, the outer peripheral edge 133 (see FIG. 2B) of the top plate 131 of the cap 130 is inclined by the lock claw 832 protruding from the lock lever 830. It collides with surface 833 (see FIG. 6C). The outer peripheral edge 133 elastically bends and deforms the lock lever 830 in a direction in which the lock claw 832 moves away from the male luer 811, while sliding on the inclined surface 833. When the lock claw 832 has finished passing through the annular projection 113 of the first mixed injection port 110, the lock lever 830 returns to the initial shape, and the lock claw 832 is fitted into the groove 114. Thus, the lock pawl 832 engages the annular protrusion 113. The engagement between the lock claw 832 and the annular protrusion 113 cannot be released by simply applying mutually opposite forces to the filter 12 and the male connector 810. However, if the operating portion 836 at the tip of the operating arm 835 is pushed toward the tubular portion 815, the lock claw 832 and the annular projection 113 can be disengaged, and the filter 12 and the male connector 810 can be separated. Is possible.

As shown in FIG. 7B, the male luer 811 of the male connector 810 penetrates the slit 121 of the septum 120, and the lateral hole 813 (see FIG. 6B) of the male luer 811 is inside the lumen 112 of the first mixed injection port 110. Exposed. Therefore, the first mixed injection port 110 and the flow path 812 of the male luer 811 communicate with each other. The septum 120 is elastically deformed by inserting the male luer 811.

FIG. 8 is a front view showing a state in which the female connector 710 of the infusion container 700 and the infusion set 800 are connected via the filter assembly 1 (adapter 11 and filter 12) of the present embodiment. In this state, a needle (not shown) provided at the downstream end of the infusion set 800 is punctured into the vein of the patient. Then, the clamp 805 is opened. The infusion solution in the infusion container 700 sequentially flows through the adapter 11, the filter 12, and the infusion set 800, and is administered to the patient. Foreign substances and bubbles in the infusion solution are removed when passing through the filter body 140.

Since the filter assembly 1 includes the filter body 140, the infusion set 800 need not include a filter for filtering the infusion. The nurse may use an infusion set without a filter as the infusion set 800.

On the other hand, as described above, there are some medicines which are not desirable or unnecessary to filter the infusion solution containing the medicines with a filter. When such a medicine is mixed in the infusion solution, the pharmacist does not have to attach the filter 12 to the adapter 11. The drug solution container 700 is carried to the patient's room where the patient is, with only the adapter 11 attached (the condition of FIG. 4 ). In the hospital room, the nurse connects the male connector 810 of the infusion set 800 to the second mixed injection port 110 ′ of the adapter 11, as shown in FIG. 9. Since the second mixed injection port 110′ is compatible with the first mixed injection port 110, the male connector 810 can be connected to the second mixed injection port 110′ in the same manner as when connecting the male connector 810 to the first mixed injection port 110′. it can. Thereafter, the infusion solution can be administered to the patient in the same manner as above. Also in this case, as the infusion set 800, an infusion set without a filter can be used.

As described above, in the present embodiment, the pharmacist who injects the medicine into the infusion container 700 to prepare the infusion determines whether to connect the filter 12 to the adapter 11 according to the type of the medicine. Since the pharmacist involved in the preparation of the infusion determines whether or not the filter 12 is necessary, the possibility of making a mistake in the determination is extremely low. The nurse connects the infusion set 800 to the first mixed injection port 110 of the filter 12 when the filter 12 is attached to the infusion container 700 (see FIG. 8), and the filter 12 is not attached to the infusion container 700. In this case, the infusion set 800 is connected to the second mixed injection port 110′ of the adapter 11 (see FIG. 9). In any case, the infusion set 800 to be connected is an infusion set without a filter. Therefore, unlike the conventional case, the nurse does not need a step of selecting an infusion set to be connected from two types of infusion sets with and without a filter. Therefore, in the present embodiment, there is a low possibility that an erroneous selection of the infusion set will occur.

In addition, the infusion therapy of the present embodiment does not require an infusion set with a filter. Therefore, unlike the prior art, it is not necessary to prepare two types of infusion sets with and without a filter, so that the number of types of infusion sets used for infusion therapy can be reduced.

Further, as shown in FIG. 7B, the adapter 11 includes an engagement mechanism (engagement claw 180) that engages with the female connector 710, and the luer connector 150 is attached to the second mixed injection port 110 ′ of the adapter 11. The first mixed injection port 110 is provided with an engaging portion (engagement protrusion 156) to be engaged, and the first mixed injection port 110 is provided with an engagement structure (annular protrusion 113) with which the lock mechanism (lock claw 832) of the male connector 810 is engaged. Although not shown, the second mixed injection port 110′ also engages with the lock mechanism (lock claw 832) of the male connector 810 when the male connector 810 is connected to the second mixed injection port 110′ as shown in FIG. It is provided with an engagement structure (annular projection 113'). Therefore, when the adapter 11, the filter 12, and the male connector 810 are sequentially connected to the female connector 710 (see FIG. 8 ), and when the adapter 11 and the male connector 810 are sequentially connected to the female connector 710 (see FIG. 9 ). In any of the above, even if a tensile force is applied between the infusion solution container 700 and the infusion solution set 800, the connection between the respective parts will not be disconnected. Further, since the first and second mixed injection ports 110 and 110' are self-closing ports having septa 120 and 120', when the male connector 810 is removed, the slits 121 and 121' are immediately closed. Therefore, in this embodiment, the possibility that the infusion solution leaks to the outside is reduced. Therefore, even if the infusion contains a dangerous drug such as an anticancer drug, the worker is unlikely to be exposed to the drug, and safety is ensured.

The engagement portion (engagement protrusion 156) provided on the luer connector 150 of the filter 12 is an engagement structure (annular protrusion 113) of the second mixed injection port 110 ′ with which the lock mechanism (lock claw 832) of the male connector 810 engages. '). Since the conventional adapter 900 (see FIG. 15) also has an engagement structure with which the lock mechanism (lock claw 832) is engaged, the conventional adapter 900 can be used as the adapter 11. In this case, in order to perform the infusion therapy of this embodiment, only the filter 12 needs to be newly prepared. That is, the above effect of the present embodiment can be obtained by only using the filter 12 in the conventional infusion therapy configuration (see FIG. 15) as needed.

Once the luer connector 150 is connected to the second mixed injection port 110', it is extremely difficult to separate the two. Therefore, if the pharmacist connects the filter 12 to the adapter 11, then the filter 12 cannot drop off from the adapter 11 when the infusion container 700 is transported, or the nurse can erroneously remove the filter 12. As a result, it is possible to prevent an accident in which the infusion solution to be filtered is accidentally administered to the patient without being filtered.

(Embodiment 2)
1. Configuration of Filter Component FIG. 10 is an exploded perspective view showing a configuration of infusion therapy using the filter assembly 2 according to the second embodiment of the present invention. The female connector 710 of the infusion container 700 and the male connector 810 of the infusion set 800 are connected via the filter assembly 2.

11A is a perspective view seen from one direction of the filter assembly 2, FIG. 11B is a perspective view seen from another direction, and FIG. 11C is a sectional perspective view thereof. The filter assembly 1 of the first embodiment is composed of two independent parts, that is, the adapter 11 and the filter 12, whereas the filter assembly 2 of the present embodiment is composed of one integral part. Among the members forming the filter assembly 2 of the second embodiment, the same members as the members forming the filter assembly 1 of the first embodiment are denoted by the same reference numerals as those in the first embodiment. The description of the first embodiment is applied to the members to which the same reference numerals as those of the first embodiment are applied, and the duplicate description will be omitted. The second embodiment will be described below, focusing on the differences from the first embodiment.

The filter assembly 2 corresponds to a combination of the adapter 11 of the first embodiment with the second mixed injection port 110′ removed and the filter 12 of the first embodiment with the luer connector 150 removed. .. That is, the filter assembly 2 includes the adapter main body 160, the first mixed injection port 110 (hereinafter, simply referred to as “mixed injection port 110” in the second embodiment), and the filter main body 140 arranged therebetween. The filter body 140 communicates with the flow path 162 of the puncture needle 161 and the inner cavity 112 of the mixed injection port 110. The mixed injection port 110 is preferably compatible with the mixed injection port 910 (see FIG. 15) of the conventional adapter 900.

The adapter body 160 and the filter body 140 may be communicated with each other via a flexible tube. Similarly, the filter body 140 and the mixed injection port 110 may be communicated with each other via a flexible tube.

2. How to Use Filter Parts The filter assembly 2 is used to connect the infusion container 700 and the infusion set 800, as shown in FIG. Below, the usage method of the filter assembly 2 is demonstrated.

Similar to the first embodiment, an infusion solution container 700 in which an infusion solution containing an arbitrary component such as an electrolyte and a nutrient is stored is prepared. Next, the medicine is injected into the infusion container 700 through the rubber stopper 715 of the female connector 710. For example, it is possible to puncture the rubber stopper 715 with a puncture needle having a sharp tip similar to the puncture needle 161, and inject a drug solution containing a drug into the infusion container 700 through the puncture needle.

Next, the adapter body 160 of the filter assembly 2 is connected to the female connector 710. The female connector 710 and the adapter main body 160 can be connected in the same manner as the female connector 710 and the adapter 11 of the first embodiment.

12A is a perspective view showing a state in which the filter assembly 2 is connected to the female connector 710, and FIG. 12B is a sectional perspective view thereof.

As in the first embodiment, the puncture needle 161 penetrates the rubber plug 715 that seals the opening of the female connector 710. The lateral hole 163 of the puncture needle 161 passes through the rubber stopper 715 and is exposed on the infusion container 700 side. Therefore, the infusion container 700, the flow path 162 of the puncture needle 161, the filter body 140, and the lumen 112 of the mixed injection port 110 are communicated in order. Since the slit 121 of the septum 120 of the mixed injection port 110 is closed, even if the infusion solution in the infusion solution container 700 flows into the lumen 112 of the mixed injection port 110, the infusion solution will not leak to the outside through the slit 121. Absent.

The engaging claw 180 of the adapter body 160 is engaged with the large diameter portion 711 of the female connector 710. Therefore, even if external force (for example, a pulling force for separating the female connector 710 and the filter assembly 2), vibration, or the like is applied to the female connector 710 and the filter assembly 2, the puncture needle 161 is not intended to come from the rubber stopper 715. There is no way out.

The above operation is generally performed by a pharmacist. As shown in FIGS. 12A and 12B, the infusion container 700 in which the filter assembly 2 of the present embodiment is connected to the female connector 710 is carried to the patient room where the patient is.

In the hospital room, the nurse performs the following operations as in the first embodiment.

First, as shown in FIG. 13, the male connector 810 of the infusion set 800 is connected to the mixed injection port 110. The male luer 811 of the male connector 810 penetrates the slit 121 of the septum 120. As a result, the mixed injection port 110 and the flow path 812 of the male luer 811 communicate with each other.

The lock claw 832 of the male connector 810 is engaged with the annular protrusion 113 of the mixed injection port 110. Therefore, the engagement between the lock claw 832 and the annular protrusion 113 cannot be released by simply applying the opposite forces to the filter assembly 2 and the male connector 810.

FIG. 14 is a front view showing a state in which the female connector 710 of the infusion container 700 and the infusion set 800 are connected via the filter assembly 2 of the present embodiment. In this state, a needle (not shown) provided at the downstream end of the infusion set 800 is punctured into the vein of the patient. Then, the clamp 805 is opened. The infusion solution in the infusion container 700 sequentially flows through the filter assembly 2 and the infusion set 800, and is administered to the patient. Foreign substances and bubbles in the infusion solution are removed when passing through the filter body 140.

Since the filter assembly 2 includes the filter body 140, the infusion set 800 need not include a filter for filtering the infusion. The nurse may use an infusion set without a filter as the infusion set 800.

On the other hand, when a medical fluid which is not desired to be filtered with the filter or a medical fluid which is unnecessary is mixed in the medical fluid, the pharmacist causes the female connector 710 to use the adapter 900 (see FIG. 15) instead of the filter assembly 2. (Or it may be the adapter 11 of Embodiment 1). The drug solution container 700, with only the adapter 900 attached, is carried to the patient's room. In the hospital room, the nurse connects the male connector 810 of the infusion set 800 to the mixed injection port 910 of the adapter 900. Since the mixed injection port 110 and the mixed injection port 910 are compatible with each other, the male connector 810 can be connected to the mixed injection port 910 in the same manner as when connecting to the mixed injection port 110. Thereafter, the infusion solution can be administered to the patient in the same manner as above. Also in this case, as the infusion set 800, an infusion set without a filter can be used.

As described above, in this embodiment, the pharmacist who injects a drug into the infusion container 700 to prepare an infusion solution connects either the filter assembly 2 or the adapter 900 to the female connector 710 according to the type of the drug. To judge. Since the pharmacist involved in the preparation of the infusion makes the judgment himself, the possibility of making a mistake in the judgment is extremely low. The nurse connects the infusion set 800 to the mixed injection port 110 when the filter assembly 2 is attached to the infusion container 700 (see FIG. 14 ), and when the adapter 900 is attached to the infusion container 700. Connects the infusion set 800 to the mixed injection port 910 (see FIG. 15). In any case, the infusion set 800 to be connected is an infusion set without a filter. Therefore, unlike the conventional case, the nurse does not need a step of selecting an infusion set to be connected from two types of infusion sets with and without a filter. Therefore, similarly to the first embodiment, in the present embodiment as well, the possibility of erroneous selection of the infusion set is low.

Further, in the infusion therapy according to this embodiment, an infusion set with a filter is unnecessary. Therefore, the number of types of infusion sets used for infusion therapy can be reduced.

Further, the adapter body 160 includes an engagement mechanism (engagement claw 180) that engages with the female connector 710, and the mixed injection port 110 has an engagement structure (annular shape) with which the lock mechanism (lock claw 832) of the male connector 810 engages. The projection 113) is provided. Therefore, when the filter assembly 2 and the male connector 810 are sequentially connected to the female connector 710 (see FIG. 14), even if a tensile force is applied between the infusion container 700 and the infusion set 800, the connection between the respective components is It does not come off. Further, since the mixed injection port 110 is a self-closing type port including the septum 120, when the male connector 810 is removed, the slit 121 is immediately closed. Therefore, also in this embodiment, the possibility that the infusion solution leaks to the outside is reduced. Therefore, even if the infusion contains a dangerous drug such as an anticancer drug, the worker is unlikely to be exposed to the drug, and safety is ensured.

The filter assembly 2 according to the second embodiment is wholly composed of one component and is inseparably integrated. Therefore, after the filter assembly 2 is connected to the female connector 710, the filter assembly 2 is disassembled, so that there is no possibility that the infusion solution containing a dangerous drug leaks to the outside.

The above-described Embodiments 1 and 2 are merely examples. The present invention is not limited to the above embodiment and can be modified as appropriate.

The configurations of the mixed injection ports 110 and 110' are not limited to those in the above embodiment, and can be arbitrarily changed. For example, the engagement structure with which the lock mechanism (lock claw 832) of the male connector engages does not need to be the annular projection 113 that is continuous in the circumferential direction, and may be, for example, a projection, a recess, or a hole that is discontinuous in the circumferential direction. May be. The engagement structure may be provided on the peripheral walls 135 and 135' of the caps 130 and 130' instead of the tubular portions 111 and 111'. The engagement portion (engagement protrusion 156) of the luer connector 150 is appropriately changed according to the position, shape, etc. of the engagement structure. The engaging portion may be a recess instead of the protrusion 156 as long as it can be engaged with the engaging structure.

The structure for making the connected second mixed injection port 110 ′ and the luer connector 150 inseparable is not limited to the first embodiment. For example, a cylindrical tubular protrusion that surrounds the second mixed injection port 110 ′ and is spaced apart from the second mixed injection port 110 ′ is formed on the substrate 165 of the adapter 11, and the second mixed injection port 110 ′ and the luer connector 150 are formed. When the above is connected, the tip of the outer cylinder 155 of the luer connector 150 may be housed between the second mixed injection port 110′ and the cylindrical projection.

The configuration of the infusion set 800 is arbitrary. For example, the male connector connected to the mixed injection ports 110 and 110' may have two lock levers as described in Patent Document 5.

INDUSTRIAL APPLICABILITY The present invention can be used in the medical field, particularly in fluid therapy. Among them, it can be preferably used for infusion therapy in which an infusion containing a dangerous drug is administered to a patient.

1, 2 Filter assembly 11 Adapter 12 Filter 110 1st mixed injection port (mixed injection port)
110' Second mixed injection port 113, 113' Annular protrusion (engagement structure)
120, 120' septum (self-closing valve body)
140 Filter body 150 Luer connector 156 Engagement protrusion (engagement part)
160 Adapter body 161 Puncture needle 180 Engaging claw (engaging mechanism)
700 Infusion Container 710 Female Connector 715 Rubber Plug 800 Infusion Set 810 Male Connector 832 Lock Claw (Lock Mechanism)

Claims (2)

A filter assembly used to connect an infusion container and an infusion set, comprising:
The filter assembly includes an adapter and a filter,
The adapter is
An adapter body connectable to a female connector of the infusion container, comprising a puncture needle for puncturing a rubber plug that seals the opening of the female connector, and an adapter body having an engagement mechanism for engaging the female connector. ,
A second mixed injection port to which a male connector provided at an upstream end of the infusion set can be connected, and a self-closing valve body and an engagement structure with which a locking mechanism of the male connector can be engaged. And a second mixed injection port communicating with the puncture needle,
The filter is
A luer connector that can be connected to the second mixed injection port, the luer connector including an engagement portion that engages with the engagement structure of the second mixed injection port,
A first mixed injection port to which a male connector provided at an upstream end of the infusion set can be connected, and a self-closing valve body and an engagement structure with which a locking mechanism of the male connector can be engaged. A first mixed injection port provided,
Wherein disposed between the luer connector and said first mixture injection port, and a filter body in communication with said luer connector and said first mixture injection port,
The adapter and the filter are provided as separate parts,
Once the engaging portion of the luer connector is engaged with the engaging structure of the second mixed injection port to connect the luer connector to the second mixed injection port, the second mixed injection port and the luer connector are connected to each other. A filter assembly that is not separable . The filter assembly according to claim 1 , wherein the first mixed injection port and the second mixed injection port are compatible with each other.

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