JP7236071B2 - infusion cartridge - Google Patents

Description

The present invention relates to infusion cartridges.

Devices for automatically or semi-automatically synthesizing, dispensing or administering drugs have been put to practical use. In addition, in such an apparatus, in order to facilitate setting of drugs or reagents used for synthesizing the drugs to the apparatus, the drugs and reagents are put together in a cassette and set in the apparatus. there is Such cassettes are described, for example, in US Pat. The cassette described in Patent Document 1 houses a manifold including a three-way, three-position stopcock valve, a part of the three-way, three-position stopcock valve having an open vial housing, and a vial housing. It penetrates the inserted reagent vial. A pipe is connected between the three-way, three-position stopcock valve and the cartridge.
Further, the radiopharmaceutical synthesizing device described in Patent Document 2 uses a disposable module fixed to a fixed module fixed to the device. The disposable module has a plurality of bolts containing reagents and a flexible tube connected to the bolts.

International publication number WO2013/048813 International publication number WO2002/051447

Pharmaceuticals used in the device include anticancer drugs and radiopharmaceuticals. Since such medicines pollute the environment if they leak to the outside, it is necessary to properly and reliably connect a pipe (tube) to a cartridge (bolt). For this reason, the inventions described in Patent Literatures 1 and 2 study the length of the piping and how to route it so that the piping does not come off the cartridge during the operation of the device, as in the case of setting in the device. I had to connect the pipes.
SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and relates to an infusion cartridge in which the mounting work is simple and flow channel members can be reliably connected.

An infusion cartridge of the present invention is an infusion cartridge that is detachably attached to a drug solution transport device for transporting a drug solution, and contains a plurality of channel members that form at least part of a channel through which the drug solution passes. It includes a resin molded body that is held in place.

INDUSTRIAL APPLICABILITY The present invention can provide an infusion cartridge capable of reliably connecting flow path members while the mounting operation is simple.

1 is a diagram for explaining an outline of an infusion cartridge according to one embodiment of the present invention; FIG. FIG. 4 is a diagram for explaining the infusion cartridge of the present embodiment; FIG. 3 is a diagram showing a state in which the infusion cartridge shown in FIG. 2 is opened; (a), (b), (c) and (d) are indicated by arrows AA, arrows BB, arrows CC, and arrows DD shown in FIG. It is a sectional view along. (a) is a cross-sectional view taken along the arrow EE shown in FIG. 2, and (b) is a cross-sectional view taken along the arrow FF shown in FIG. It is a figure which shows the state which attached the resin molding shown in FIG. 1 to the chemical|medical-solution transport apparatus which is not shown in figure. 7 is a view showing the surface of the removable cassette shown in FIG. 6 on the side to which the resin molded body is attached; FIG.

An embodiment of the present invention will be described below with reference to the drawings. In addition, in all the drawings, the same components are denoted by the same reference numerals, and overlapping descriptions are omitted as appropriate. Also, the drawings of the present embodiment are diagrams for explaining the configuration, function, and operation of the present invention, and do not necessarily show the sizes such as height, width, and thickness accurately. Furthermore, the specific shape of this embodiment is not limited to the illustrated shape.

[overview]
FIG. 1 is a diagram for explaining an outline of an infusion cartridge 1 of this embodiment. The infusion cartridge 1 is configured to be detachably attached to a drug solution transport device for transporting a drug solution. A drug solution transport device is a structure that extracts a drug solution contained in a vial bottle in a drug administration device or a dispensing device and delivers it to an administration channel or another container, and in a synthesizer device, a reagent. It is configured to extract from a bottle or the like and send it to the reaction system.
The infusion cartridge 1 has a molded resin body 100, a holding portion 120 formed in the molded resin body 100, and a tube 200 and a flow switching member 300 which are channel members accommodated and held in the holding portion 120. are doing. The resin molded body 100 may be molded from a resin sheet made of resin and has a hollow holding portion 120 capable of accommodating the tube 200 and the flow path switching member 300 therein. The channel member may be any member as long as it allows liquid reagents and chemicals to flow or temporarily store them. , a filter for filtering a chemical solution, a bottle or a bottle containing a reagent, and the like can be considered.

In the present embodiment, "accommodate" means that at least part of the flow path member is arranged in a space surrounded by the resin molded body, and the resin molded body covers at least part of the flow path member. Preferably, "holding" means a state in which at least a portion of the flow path member and the resin molded body are in contact with and supported by one or more contact points, and at least a portion of the flow path member and the two or more contact points are supported. "Accommodating and holding" means that at least a part of the flow channel member and the resin molded body are supported by contacting at least two points of contact, and at least a part of the flow channel member is supported. is preferably covered with a resin molding.
The “sheet shape” may be flat or uneven, and means that the length of the sides of the main surface is sufficiently large compared to the thickness. The ratio of the thickness of the sheet to the edge of the main surface is similar to that of sheet metal or paper.

Examples of the resin used for the resin molding 100 include acrylonitrile, butadiene, and styrene copolymer synthetic resin (ABS resin), polyvinyl chloride, polyethylene, polypropylene, polystyrene, styrene acrylonitrile copolymer (AS resin), Any of polymethylmethacryl, polyethylene, terephthalate, and the like may be used. In this way, the present embodiment is advantageous in making the infusion cartridge 1 disposable by using a relatively inexpensive and easily processed resin molded body.

The tube 200 is made of flexible resin. The resin that can be used for the tube 200 may be the same as that for the resin molded body 100, or may be different. Examples of different materials include nylon elastomer, fluororesin, polyvinylidene fluoride, silicone rubber, polyvinyl chloride, polybutadiene, polyurethane and polyolefin.
The channel switching member 300 may be any member, such as a three-way stopcock, that can selectively connect or disconnect the tube 200 with any one of the plurality of channels. Flow path switching member 300 shown in FIG. 1 is configured to connect tube 200 to flow path 201 or flow path 202 . The channel switching member 300 is made of resin such as polycarbonate, polyethylene, polypropylene, or the like.

The holding part 120 shown in FIG. 1 is configured to accommodate the channel switching member 300 together with the tube 200 and has a space inside the outer edges of the tube 200 and the channel switching member 300 . Of the spaces, the space that accommodates the tube 200 holds the tube 200 in a state in which the tube 200 is appropriately routed, and the tube 200 is fixed inside the holding portion 120 . The holding part 120 can be formed, for example, by stacking the sheet-shaped resin sheets described above and holding the parts forming the space apart from each other.
Such this embodiment can fix and protect the tube 200 in an appropriate state during operation of the chemical transport device, and can prevent the tube 200 from coming off. Further, in this embodiment, the tube 200 and the channel switching member 300 can be attached together with the resin molding 100 for transporting the chemical solution. Therefore, in this embodiment, it is not necessary to route the tube 200 and attach it to the chemical transport device, and the tube 200 and the flow path switching member 300 can be easily attached to the chemical transport device.

Next, the configuration of this embodiment will be specifically described. In this embodiment, an example in which an infusion cartridge is attached to a drug solution transport device as a radiopharmaceutical administration device will be described.
The radiopharmaceutical administered by the radiopharmaceutical administration device is liquid. Although the type of the radiopharmaceutical is not particularly limited, for example, a radiopharmaceutical containing a short-lived nuclide for PET (Positron Emission Tomography) examination, such as FDG (fluorine-18-labeled glucose derivative: [ ¹⁸ F] -2-deoxy-2-fluoro-D-glucose), [ ¹⁸ F]flutemetamol, [ ¹⁸ F]florbetapyr, [ ¹⁸ F]florbetaben, [ ¹⁸ F]fluciclovin, [ ¹⁸ F]fluoroethyltyrosine (FLT), [ ¹⁸ F]fluoromisonidazole, FDOPA (preparation labeled with fluorine 18: L-3,4-dihydroxy-6-[ ¹⁸ F]-fluorophenylalanine), FDA (6-[ ¹⁸ F]-fluorodopamine), [ ¹⁸ F]sodium fluoride, [ ¹¹ C]methionine, [ ¹¹ C]acetic acid, [ ¹¹ C]choline derivatives, [ ¹³ N]ammonia, [ 64Cu]dithiosemicarbazone derivatives, etc., and SPECT (single Single Photon Emission Computed Tomography (Single Photon Emission Computed Tomography) Radiopharmaceuticals containing radionuclides ( ⁹⁹ mTc, ¹²³ I, ¹³¹ I, ²⁰¹ Tl, ⁶⁷ Ga, ⁵¹ Cr, etc.) for examination, or radioactive agents for internal radiotherapy A radiopharmaceutical containing a nuclide (such as iodine-131) may also be used.

FIG. 2 is a diagram for explaining the infusion cartridge 2 of this embodiment. The infusion cartridge 2 is an infusion cartridge that is detachably attached to a drug solution transport device that transports a drug solution. The infusion cartridge 2 includes a resin molded body 10 that accommodates and holds a plurality of channel members that constitute at least part of a channel through which the liquid medicine passes. FIG. 3 shows a state in which the infusion cartridge 2 shown in FIG. 2 is opened. 4(a), 4(b), 4(c) and 4(d) are the arrows AA, BB, CC and CC shown in FIG. 4A and 4B are cross-sectional views respectively along lines DD;

2 and 3, in this embodiment, at least a portion of the flow path member is held by the resin molded body 10. As shown in FIG. The channel members held by the resin molding 10 include the tube 21 , the channel switching member 31 , the male connector 251 and the female connector 252 . The male connector 251 and the female connector 252 are connectors that are screwed to the tube 21 and an air vented filter 253 (FIG. 6: a filter with filtering sterilization function) as an infusion filter, respectively. Such a connector may be of any kind as long as it is mated with the infusion filter, for example a luer connector is used.
In addition, the resin molding 10 has a hollow holding portion 12 that holds such a channel member inside. A space adjusting portion 121 is formed inside the holding portion 12 to maintain a constant space between the two tubes 21 arranged in parallel.
In addition, in this embodiment, the three switching portions 37 are connected by the flow paths 35 to form the integrated flow path switching member 31 . Such a channel switching member 31 is advantageous for miniaturization of the resin molded body 10, and can contribute to miniaturization of the entire device to which the resin molded body 10 is mounted.

The three channel switching members 31 have a common channel 35 and are connected to the channel 32 respectively. The flow path switching member 31 switches the flow path to three patterns: flow path 35 (right side)/flow path 35 (left side), flow path 32/flow path 35 (right side), and flow path 32/flow path 35 (left side). It is possible. 2, and the fitting portion 36 (FIG. 5) of the switching portion 37 protrudes from the resin molded body 10 in the -z direction. protruding from Therefore, as shown in FIG. 3, the first resin portion 10a is formed with an opening 17 through which the fitting portion 36 protrudes, and the second resin portion 10b is formed with an opening 18 through which the switching portion 37 protrudes. ing.
Also, the resin molding 10 has an opening 26 between the male connector 251 and the female connector 252 . The openings 17, 18, and 26 are openings (communication openings) that allow communication between the holding portion 12 and the outside. In this embodiment, sterilization may be performed by directly circulating, for example, ethylene oxide into the holding portion 12 through such a communication opening.
Furthermore, mounting openings 131, 132, 133, and 134 are formed in the resin molding 10, and engaging portions (not shown) provided in the mounting openings 131, 132, 133, and 134 on the side of the drug delivery device are provided. ) directly or indirectly.

As shown in FIG. 3, the resin molding 10 has a first resin portion 10a and a second resin portion 10b that sandwiches and holds at least a portion of the flow channel member together with the first resin portion 10a. . The first resin portion 10a and the second resin portion 10b are integrated and face each other by bending the boundary 10c of each other, and the tube 21 or the like as a flow path member is sandwiched between them.
In this embodiment of the configuration in which the tube 21 or the like is sandwiched between the first resin portion 10a and the second resin portion 10b, a space is created between the first resin portion 10a and the second resin portion 10b when the first resin portion 10a and the second resin portion 10b are overlapped. ing.

In this embodiment, at least one of the first resin portion 10a and the second resin portion 10b is formed from the resin sheet described above. The resin sheet has recesses or protrusions along the tube 21, the flow path switching member 31, the male connector 251 and the female connector 252, and the recesses or protrusions have shape retention. The term "shape retaining property" as used in the present embodiment refers to the extent to which the shape does not change even when the concave portion or the convex portion encloses the channel member, and the change in shape is not visually observed even when attached to the chemical transport device. is enough.
Here, the unevenness of the first resin portion 10a and the second resin portion 10b will be described. In this description, a portion having a concave shape is referred to as a concave portion, and a portion having a convex shape is referred to as a convex portion with reference to the front surface (the side toward which the switching portion 37 faces) of the chemical transport device.

In the resin molding 10 shown in FIG. 3, the first resin portion 10a and the second resin portion 10b are folded in the z-direction around the boundary 10c (valley fold). When the integrated first resin portion 10a and second resin portion 10b are folded into a valley fold, the second resin portion 10b is located on the front side, and the first resin portion 10a is located on the back side with respect to the front surface. .
In this way, the present embodiment in which the resin molded body 10 is formed by folding the integral resin sheet can increase the strength while maintaining the flexibility of the resin molded body 10 . In addition, such a configuration eliminates the need to align and stack two resin sheets, so that the processing efficiency of the resin molded body 10 can be improved.

As shown in FIG. 4(a), in the portion indicated by the arrow AA in FIG. Further, the concave portion 124 of the second resin portion 10b extends into the holding portion 12 to hold down the tube 21 and fix it. Similarly, as shown in FIGS. 4(b) and 4(c), in the portion indicated by the arrow BB and the portion indicated by the arrow CC in FIG. 12a and the recessed portion 12b of the second resin portion 10b overlap to form a space, and the recessed portion 124 of the second resin portion 10b extends into the holding portion 12 to press and fix the tube 21. As shown in FIG.
Furthermore, as shown in FIG. 4(d), in the portion indicated by the arrows DD in FIG. The tube 21 is pressed so that the distance between 21 and 21 is constant.

The space formed by the recesses 12a and 12b made of resin sheets expands flexibly according to the bending of the recesses 124 made of a similar resin sheet. This embodiment utilizes such a property and is designed so that the recess 124 expands slightly within the space formed by the recesses 12a and 12b and presses the tube 21 with an appropriate pressing force. Appropriate pressing force refers to a pressing force that does not cause displacement of the tube 21 within the holding portion 12 within a range that does not affect the flow path in the tube 21 .
In this embodiment, the tube 21 is always held in a proper state within the holding portion 12, and the tube 21 can be easily and properly attached together with the resin molding 10 in a short period of time.

FIG. 5(a) is an end view taken along the arrow EE shown in FIG. 2, and the parts other than the end face are indicated by phantom lines. As shown in FIG. 5A, the channel switching member 31 has a switching portion 37 protruding from the resin molding 10 in the z direction and a fitting portion 36 protruding in the -z direction. The first resin portion 10a and the second resin portion 10b sandwich and hold the channel 35, which is a part of the channel switching member 31. As shown in FIG. The first resin portion 10a has a concave portion 12a and the second resin portion 10b has a convex portion 126 inside the concave portion 122 so as to sandwich the flow path 35 therebetween. With such a configuration, in this embodiment, the channel 35 is held relatively without gaps, and while a portion of the channel switching member 31 is held, the position of the entire channel switching member 31 is prevented from being displaced during operation of the chemical transport device. can prevent you from doing it.
FIG. 5(b) is a schematic cross-sectional view along the arrow FF shown in FIG. The first resin portion 10a has an opening 17 from which the switching portion 37 protrudes, and the second resin portion 10b has an opening 18 from which the fitting portion 36 protrudes. traverses over the openings 17,18.

Further, the switching portion 37 of the channel switching member 31 has a cock 33 capable of automatically switching the switching portion 37 by a drive mechanism provided on the side of the chemical transport device. The switching unit 37 serves as a driven unit to which the driving force of a motor, an actuator, or the like provided on the side of the chemical transport device is transmitted. A configuration for driving force transmission will be described later. The opening 18 functions as a projecting opening for projecting the driven portion (switching portion 37) from the second resin portion 10b.
That is, the radiopharmaceutical administration device to which the resin molded body 10 is attached is provided with a drive section such as a motor and an actuator. The drive section rotates the switching section 37 directly or via the fitting recess 66 of the detachable cassette 50 (FIG. 7) to switch the flow path of the flow path switching member 31 .

FIG. 6 shows a state in which the resin molding 10 described above is attached to a chemical transport device (not shown) and viewed from the Z direction. In addition, in the example shown in FIG. 6, the resin molding 10 is attached to the chemical transport device via the detachable cassette 50 . However, this embodiment is not limited to attaching the resin molded body 10 to the chemical transport device via the detachable cassette 50, and may be directly attached. FIG. 7 is a view showing the surface of the detachable cassette 50 to which the resin molded body 10 is attached. As shown in FIG. 7, the removable cassette 50 has a fitting recess 66 corresponding to the fitting portion 36, and the fitting portion 36 is fitted and held in the fitting recess 66. As shown in FIG. Then, it is rotated and driven through the fitting recess 66 by a motor or actuator (not shown) of the drug solution transport device.

The detachable cassette 50 includes the first syringe 45 , the second syringe 46 and the air vented filter 253 together with the resin molding 10 in a state of being attached to the drug solution transporting device. The male connector 251 and the female connector 252 are connectors that are screwed onto the tube 21 and the air vented filter 253, respectively. In addition, the resin molding 10 is provided with a loose insertion holding portion 15 for loosely inserting the tube 21 continuing to the male connector 251 and the female connector 252 . The loose insertion holding portion 15 has a wider range of movement of the tube 21 than the other portions of the holding portion 12 , and the tube 21 can be moved through the loose insertion holding portion 15 by manually pulling out the male connector 251 and the female connector 252 . It moves and is easily pulled out to the opening 26 side.
With such a configuration, in this embodiment, when the air vented filter 253 is attached to the male connector 251 and the female connector 252 by fitting them together, the tube 21 can be easily pulled out to facilitate the attachment work. .

That is, in the mounting operation, one of the male connector 251 and the female connector 252 (for example, the female connector 252) is supported with one hand, and the male connector 251 is brought into contact with the air vented filter 253 with the other hand and rotated. It is necessary to During such operation, the tube 21 needs to be longer than after the male connector 251 and female connector 252 are attached. In consideration of this point, in this embodiment, the tube 21 is loosely inserted into the loose insertion holding portion 15, the tube 21 is pulled out during the screwing operation, and after the installation, the tube 21 is moved to the loose insertion holding portion 15. 15 can be loosely inserted again.

Furthermore, in the present embodiment, both the first resin portion 10a and the second resin portion 10b may be configured such that the entire surface of the opening 26 is open. Further, in the present embodiment, the first resin portion 10a is positioned below (-Z direction) the male connector 251 or the female connector 252 of the opening 26 in either or both of the first resin portion 10a and the second resin portion 10b. may exist. In this way, in the operation of attaching the male connector 251 or the female connector 252 to the air vented filter 253, the previously attached connector is stably supported by the first resin portion 10a or the second resin portion 10b. Installation work can be facilitated.

As described above, in this embodiment, the tube 21 which is at least part of the channel member is connected to the second syringe 46, and the channel switching member 31 is connected to the first syringe 45 and the second syringe 46. In other words, in this embodiment, the first syringe 45 and the second syringe 46 are not held in the resin molding 10 as channel members, but the tube 21 and the channel switching member 31 are held.
In this embodiment, it is possible to simplify the setting of the flow channel member to the device, and the flow channel is routed without difficulty. to strictly prevent leakage from the tube. In this embodiment, unlike the inventions described in Patent Document 1 and Patent Document 2, which are cited as known technologies, the containers of the chemical liquid are arranged at preset positions, but the liquid medicine containers are routed between the containers. It focuses on the flow path (tube) that Since the channel switching member 31 is provided with the channel 32 to which the first syringe 45 and the second syringe 46 can be connected together with the tube 21, the container (syringe) of the liquid medicine is connected to the tube 21 which is preferably routed. becomes possible. In addition, since such a configuration can be used by connecting a previously sterilized and sealed syringe at the site of synthesizing, distributing, or administering a chemical solution, the reliability of prevention of contamination of the chemical solution can be improved. can.

When the resin molded body 10 is attached to the chemical transport device via the detachable cassette 50 , the detachable cassette 50 includes the tube 21 held in the resin molded body 10 together with the resin molded body 10 and the flow path connected to the tube 21 . A switching member 31, a first syringe 45 and a second syringe 46 for withdrawing the radiopharmaceutical and administering the withdrawn radiopharmaceutical to the subject through the tube 21, and an air vented filter 253 are attached. Moreover, as shown in FIG. 7, the removable cassette 50 has a first opening 52 and a second opening 53 .

Furthermore, in this embodiment, the upper edge portion 54a and the lower edge portion 54b of the detachable cassette 50 are directed in the z-axis direction in FIG. , and can hold the resin molding 10 together with the mounting opening 131 and the like. The upper edge portion 54a, the lower edge portion 54b, and the mounting opening 131 to the mounting opening 134 are used to mount the resin molded body 10 on the detachable cassette 50 when the resin molded body 10 is mounted on the drug solution transport device together with the detachable cassette 50. It functions as a mounting part for

The drug solution transporting device also has two syringe driving units, a syringe driving unit (not shown) corresponding to the first opening 52 and a syringe driving unit (not shown) corresponding to the second opening 53 . Each syringe drive unit can move up and down using an actuator such as a motor or cylinder (not shown) as a drive source. The vertical movement of the syringe drive section causes the plunger sections 47 of the first syringe 45 and the second syringe 46 to move vertically within the syringe body 48 .

According to this embodiment, the detachable cassette 50 is attached to the detachable cassette 50 with the tube 21, the flow path switching member 31, the first syringe 45, the second syringe 46, and the air vented filter 253. By attaching to the apparatus, disposable parts such as the tube 21, the flow path switching member 31, the first syringe 45, the second syringe 46 and the air vented filter 253 can be easily set. In addition, in this embodiment, the resin molded body 10 and the first syringe 45 and the second syringe 46 can be easily removed from the detachable cassette 50 while the first syringe 45 and the second syringe 46 are attached to the resin molded body 10. . Therefore, in this embodiment, when the drug solution to be transported is a radiopharmaceutical, after administration of the radiopharmaceutical, a worker (medical worker) can shorten the time of staying near the drug solution transporting apparatus, reducing the operator's exposure to radiation. amount can be reduced.
Furthermore, in this embodiment, it is not necessary to wait until the radiation of the detachable cassette 50 attenuates after removing the resin molding 10 and the first syringe 45 and the second syringe 46 from the detachable cassette 50 . Therefore, this embodiment can improve the usage efficiency of the detachable cassettes 50 and, in turn, can reduce the number of detachable cassettes 50 to be owned, thereby contributing to cost reduction.

The above embodiments include the following technical ideas.
(1) An infusion cartridge that is detachably attached to a drug solution transporting device that transports a drug solution and that contains and holds a plurality of channel members that form at least part of a channel through which the drug solution passes. An infusion cartridge containing a resin molding.
(2) The infusion cartridge according to (1), wherein the resin molded body has a hollow holding portion that holds the channel member inside, and a communication opening that allows communication between the holding portion and the outside.
(3) The resin molding of (1) or (2), wherein the resin molded body includes a first resin portion and a second resin portion that sandwiches and holds at least a portion of the flow path member together with the first resin portion. Infusion cartridge.
(4) The infusion cartridge of (3), wherein the first resin portion and the second resin portion are integrated and face each other by being bent at their boundaries.
(5) The infusion cartridge according to (3) or (4), wherein at least one of the first resin portion and the second resin portion is formed of a resin sheet.
(6) The infusion cartridge according to (5), wherein the resin sheet has recesses or protrusions along the channel member, and the recesses or protrusions have shape retention properties.
(7) According to any one of (1) to (6), the resin molding includes a hollow holding portion that holds the flow channel member therein, and at least a portion of the flow channel member is held in the holding portion. Any one infusion cartridge.
(8) The flow path member includes a flow path switching member for switching the flow path, and the resin molding has a driven portion, to which a driving force is transmitted to the flow path switching member, protrudes from the resin molding. The infusion cartridge of (7), having a projecting opening.
(9) The flow path member held by the resin molding includes a connector screwed to the infusion tube and the infusion filter, and the resin molding is loosely inserted and held so that the infusion tube following the connector is loosely inserted. The infusion cartridge of (7) or (8), comprising a portion.
(10) The infusion cartridge according to any one of (7) to (9), wherein at least part of the channel member is connected to a syringe that transports the drug solution.
(11) The resin molding is attached to the drug solution transport device together with a detachable cassette detachably attached to the drug solution transport device, and has a mounting portion for mounting to the detachable cassette. (1) to (10) any one infusion cartridge of

Reference Signs List 1, 2... Infusion cartridges 10, 100... Resin molding 10a... First resin portion 10b... Second resin portion 10c... Boundaries 12, 120... Holding parts 12a, 12b, 124... Recessed part 15... Loose insertion holding parts 17, 18, 26... Openings 21, 200... Tubes 17, 26... Openings 31, 300... Flow path switching members 32, 35, 201, 202... Flow path 33... Cock 36... Fitting part 37... Switching part 45... First syringe 46... Second syringe 47... Plunger part 48... Syringe main body 50 Detachable cassette 52 First opening 53 Second opening 54 Third opening 54a Upper edge 54b Lower edge 121 Spacing adjustment part Reference numeral 126... Protrusions 131, 132, 133, 134... Mounting opening 251... Male connector 252... Female connector 253... Air vented filter

Claims (8)

An infusion cartridge detachably attached to a drug solution transport device for transporting a drug solution,
including a resin molding that accommodates and holds a plurality of channel members that constitute at least part of a channel through which the chemical passes;
The resin molded body includes a hollow holding portion that holds the flow channel member inside, and at least a portion of the flow channel member is held in the holding portion,
The resin molded body includes a first resin portion and a second resin portion holding at least a portion of the flow path member together with the first resin portion,
At least one of the first resin portion and the second resin portion is formed of a resin sheet,
Each of the first resin portion and the second resin portion has a recess along the flow path member, the recess having shape retention,
The recess of the first resin portion includes a first recess and a second recess further recessed from the first recess,
The recessed portion of the second resin portion includes a third recessed portion recessed in the same direction as the first recessed portion and fitted in the first recessed portion, and a fourth recessed portion formed in the third recessed portion. , including
A space is formed between the second concave portion and the fourth concave portion, and the space constitutes the holding portion,
The infusion cartridge, wherein the fourth recess is recessed in a direction toward the second recess or in a direction away from the second recess, and presses at least a portion of the channel member inside the holding portion. 2. The infusion cartridge according to claim 1, wherein said molded resin body has said hollow holding portion for holding said channel member inside, and a communication opening for communicating said holding portion with the outside. 3. The infusion cartridge according to claim 1 , wherein said first resin portion and said second resin portion are integral and face each other by bending a boundary between them. The fourth recess is recessed in a direction away from the second recess,
4. The infusion cartridge according to any one of claims 1 to 3, wherein the second recess and the fourth recess sandwich and hold at least part of the channel member inside the holding portion. The flow channel member includes a flow channel switching member for switching the flow channel, and the resin molded body has a protruding opening for projecting a driven portion to which a driving force is transmitted to the flow channel switching member from the resin molded body. 5. An infusion cartridge according to any one of claims 1 to 4, comprising: The flow path member held by the resin molded body includes a connector screwed to the infusion tube and the infusion filter, and the resin molded body has a loose insertion holding portion into which the infusion tube connected to the connector is loosely inserted. 6. The infusion cartridge of any one of claims 1-5 , wherein the infusion cartridge is 7. The infusion cartridge according to any one of claims 1 to 6 , wherein at least part of said channel member is connected to a syringe for transporting said liquid medicine. 8. The resin molding according to any one of claims 1 to 7 , wherein the resin molding is attached to the chemical liquid transport device together with a detachable cassette detachably attached to the chemical liquid transport device, and has a mounting portion for mounting on the detachable cassette. The infusion cartridge described in .

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