Prefilled Syringes

Abstract

To provide a prefilled syringe including an RFID tag from which data is easily acquired by a syringe pump and which is less likely to be detached, and a liquid medicine administration system, and to provide a syringe pump adapted to the prefilled syringe.SOLUTION: A prefilled syringe is disclosed, which includes: a liquid medicine; a barrel including a cylindrical body section containing the liquid medicine, and a nozzle section provided on a distal end side of the body section to discharge the liquid medicine; a cap sealing a distal end opening; a gasket sliding on an inner circumferential surface of the body section; a plunger that can be mounted to the gasket; and an RFID tag having an antenna for communication, structured from an antenna wire wound in a rectangle, and a memory, with its location fixed with respect to the outer circumferential surface of the body section. The outer diameter of the body section is 14 mm to 33 mm. The maximum circumferential length of the antenna is 9 mm to 25 mm. The circumferential length of the outer circumferential surface of the body section is 2.0 times to 7.0 times the maximum circumferential length of the antenna.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a pre-filled syringe, a drug solution administration system, and a syringe pump. [Background technology]

[0002] In medical settings such as operating rooms or intensive care units, when a drug such as an intravenous anesthetic is delivered to a patient's body, it is necessary to deliver the drug for a long period of time while appropriately adjusting the flow rate of the drug to be delivered (hereinafter, also simply referred to as the "delivery amount") according to the procedure to be applied and the patient's symptoms, etc. As a device for delivering a drug accurately for a long period of time at a set delivery amount, for example, a drug administration device such as a syringe pump that can deliver the drug using a prefilled syringe containing a drug in a barrel is known.

[0003] Patent Document 1 discloses a liquid injector as this type of liquid administration device. Patent Document 1 also discloses a syringe equipped with an RFID (Radio Frequency Identification) tag on which various data are recorded, which is to be attached to the liquid injector. Furthermore, the liquid injector described in Patent Document 1 has an RFID module including a reader that acquires various data recorded from the RFID tag of the syringe. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2015-217176 A Summary of the Invention [Problem to be solved by the invention]

[0005] When using the liquid injection device described in Patent Document 1, a syringe is placed on the base of the liquid injection device at a medical site. When placing the syringe, the RFID tag needs to be placed close to the reader of the liquid injection device so that the reader of the liquid injection device can obtain data on the RFID tag of the syringe. Therefore, it is necessary to place the cylindrical syringe on the base of the liquid injection device while aligning the position of the RFID tag of the syringe with the position of the reader of the liquid injection device. This work is cumbersome for medical personnel. In addition, when the above-mentioned alignment is performed by rotating the syringe around its axis while the syringe is placed on the base, there is a risk that the RFID tag of the syringe will be damaged due to sliding between the RFID tag fixed to the outer circumferential surface of the syringe and the base of the liquid injection device.

[0006] Furthermore, when the RFID tag is attached to the outer circumferential surface of the syringe, the outer circumferential surface of the syringe is curved, so the attached RFID tag is deformed. As a result of this deformation, there is a risk that the RFID tag may peel off.

[0007] The present disclosure aims to provide a pre-filled syringe and a drug solution administration system that are equipped with an RFID tag that allows a syringe pump to easily acquire data and is difficult to peel off, and also aims to provide a syringe pump compatible with the pre-filled syringe. [Means for solving the problem]

[0008] A prefilled syringe according to a first aspect of the present invention comprises a barrel having a medicinal liquid, a cylindrical body containing the medicinal liquid, and a nozzle portion provided at the tip side of the body and discharging the medicinal liquid; a cap for sealing the tip opening provided at the tip of the nozzle portion; a gasket sliding on the inner circumferential surface of the body; a pusher that can be attached to the gasket; and an RFID tag having a communication antenna and memory constituted by an antenna wire wound in a rectangular shape and fixed in position relative to the outer circumferential surface of the body, the outer diameter of the body of the barrel being 14 mm to 33 mm, the maximum circumferential length of the antenna of the RFID tag along the circumferential direction of the body of the barrel being 9 mm to 25 mm, and the circumferential length of the outer circumferential surface of the body of the barrel being 2.0 to 7.0 times the maximum circumferential length of the antenna of the RFID tag.

[0009] In one embodiment of the present invention, the maximum axial length of the RFID tag along the axial direction of the body of the barrel is between 8 mm and 25 mm.

[0010] In one embodiment of the present invention, the barrel has a flange portion protruding from a base end of the body portion, and the body portion has a clamp abutment portion near the flange portion that abuts against a clamp portion of a syringe pump that drives the plunger, and the RFID tag is positioned on the tip side of the clamp abutment portion in the axial direction of the body portion.

[0011] As one embodiment of the present invention, the distance between the base end of the RFID tag and the tip end of the flange portion of the barrel in the axial direction of the body portion is 15 mm to 40 mm.

[0012] In one embodiment of the present invention, the RFID tag is disposed on the base end side of the tip of the gasket in the axial direction of the body.

[0013] A pre-filled syringe according to one embodiment of the present invention further comprises an information label attached to the body of the barrel, and the RFID tag is attached to the inner or outer surface of the information label.

[0014] A pre-filled syringe according to one embodiment of the present invention further includes an information label attached to the body of the barrel so as to cover the outer surface of the RFID tag.

[0015] In one embodiment of the present invention, the information label has a scale indicating the amount of the medicinal liquid in the body, which is provided along the axial direction of the body of the barrel, and at least a portion of the RFID tag is positioned so as to overlap at least a portion of the scale in the axial direction of the body of the barrel and to be shifted circumferentially around the body of the barrel.

[0016] In one embodiment of the present invention, a plurality of the scales are provided, and the RFID tag is disposed between at least two of the scales.

[0017] In one embodiment of the present invention, the at least two scales are symmetrical with respect to a central axis of the body of the barrel.

[0018] A drug solution administration system according to a second aspect of the present invention is a drug solution administration system having a syringe pump and a prefilled syringe installed in the syringe pump, the prefilled syringe comprising: a barrel having a drug solution, a cylindrical body portion containing the drug solution, and a nozzle portion provided at the tip side of the body portion and discharging the drug solution; a cap for sealing a tip opening provided at the tip portion of the nozzle portion; a gasket that slides on an inner circumferential surface of the body portion; a pusher that can be attached to the gasket; and an RFID tag having a communication antenna and memory constituted by an antenna wire wound in a rectangular shape, the position of which is fixed relative to an outer circumferential surface of the body portion, the outer diameter of the body portion of the barrel being 14 mm to 33 mm, The maximum circumferential length of the antenna of the RFID tag along the circumferential direction of the body is 9 millimeters to 25 millimeters, and the circumferential length of the outer circumferential surface of the body of the barrel is 2.0 to 7.0 times the maximum circumferential length of the antenna of the RFID tag. The syringe pump has a main body including a syringe pusher drive unit that drives the pusher of the prefilled syringe in a tip direction toward the tip side of the body, a reader that reads a data set stored in the memory of the RFID tag of the prefilled syringe and a control unit that controls the syringe pusher drive unit, a support unit that supports the outer circumferential surface of the body of the prefilled syringe from a direction perpendicular to the axis of the body, and a clamp unit that faces the support unit and clamps the body between the support unit and the main body.

[0019] In one embodiment of the present invention, when the clamping portion clamps the prefilled syringe between the support portion and the clamping portion, the portion of the outer peripheral surface of the barrel that is clamped by the clamping portion is different from the portion to which the RFID tag is affixed.

[0020] In one embodiment of the present invention, the barrel has a flange portion protruding from the base end of the body, and the distance between the base end of the RFID tag and the tip of the flange of the barrel in the axial direction of the body is 15 millimeters to 40 millimeters, and the clamp portion clamps the prefilled syringe together with the support portion by abutting near the flange portion of the body.

[0021] In one embodiment of the present invention, the main body of the syringe pump has a first region facing the clamp portion and a second region adjacent to the first region in the axial direction of the barrel and arranged on the opposite side of the syringe plunger drive portion, and the reader includes a reader antenna composed of a reader antenna wire that communicates with an antenna of the RFID tag, and at least a portion of the reader antenna is arranged in the second region.

[0022] In one embodiment of the present invention, the center line of the reader antenna, which is perpendicular to the axial direction of the body of the barrel when viewed from the front of the support part, is located in the second region, and the center line of the reader antenna overlaps with the antenna of the RFID tag when viewed from the front of the support part.

[0023] A drug solution administration system according to a third aspect of the present invention is a syringe pump in which a prefilled syringe is installed. The prefilled syringe is a prefilled syringe including: a barrel having a drug solution, a cylindrical body portion containing the drug solution, and a nozzle portion provided at the tip side of the body portion and discharging the drug solution; a cap for sealing a tip opening provided at the tip portion of the nozzle portion; a gasket that slides on an inner circumferential surface of the body portion; a pusher that can be attached to the gasket; and an RFID tag having a communication antenna and memory constituted by an antenna wire wound in a rectangular shape, the position of which is fixed with respect to the outer circumferential surface of the body portion. The syringe pump includes a syringe pusher driving unit that drives the pusher of the prefilled syringe in a tip direction toward the tip side of the body portion; The syringe pump has a main body portion including a reader that reads a data set stored in the memory of the RFID tag of the prefilled syringe and a control portion that controls the syringe plunger drive unit, a support portion that supports the outer peripheral surface of the barrel of the prefilled syringe from a direction perpendicular to the axis of the barrel, and a clamp portion that faces the support portion and clamps the barrel of the prefilled syringe between the support portion and the support portion, and the main body portion of the syringe pump has a first region that faces the clamp portion and a second region that is adjacent to the first region in the axial direction of the barrel and is arranged on the opposite side to the syringe plunger drive unit, and the reader includes a reader antenna composed of a reader antenna wire that communicates with the antenna of the RFID tag, and at least a portion of the reader antenna is arranged in the second region.

[0024] In one embodiment of the present invention, a center line of the reader antenna, which is perpendicular to an axial direction of the body part of the barrel in a front view of the support part, is disposed in the second region. Effect of the Invention

[0025] According to the present disclosure, it is possible to provide a pre-filled syringe and a drug solution administration system that are provided with an RFID tag that is difficult to peel off and that allows a syringe pump to easily acquire data. Also, according to the present disclosure, it is possible to provide a syringe pump compatible with the pre-filled syringe. [Brief description of the drawings]

[0026] [Figure 1] FIG. 1 is a perspective view showing a drug solution administration system including a prefilled syringe and a syringe pump as one embodiment. [Diagram 2] FIG. 2 is a perspective view showing the prefilled syringe shown in FIG. 1. [Diagram 3] FIG. 3 is a diagram showing an information label attached to the prefilled syringe shown in FIG. 2. [Figure 4] FIG. 1 is a block diagram showing an RFID tag affixed to a prefilled syringe and a reader in a syringe pump. [Diagram 5] FIG. 1 illustrates an example of a method for obtaining a prefilled syringe with an informational label. [Figure 6] 2 is an enlarged front view of a portion of the front view of the main body of the syringe pump shown in FIG. 1. [Figure 7] FIG. 2 is a cross-sectional view of the pre-filled syringe and the syringe pump shown in FIG. 1. [Figure 8] FIG. 11 is a perspective view showing a pre-filled syringe according to another embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0027] Hereinafter, embodiments of a pre-filled syringe, a drug solution administration system, and a syringe pump according to the present disclosure will be described with reference to Figures 1 to 8. The same reference numerals are used to designate common members and parts in each figure.

[0028] FIG. 1 is a perspective view showing a drug solution administration system 1 including a prefilled syringe 200 and a syringe pump 100 as an embodiment. FIG. 2 is a perspective view showing the prefilled syringe 200 shown in FIG. 1. FIG. 3 is a view showing an information label 300 attached to the prefilled syringe 200 shown in FIG. 2. FIG. 4 is a block diagram showing an RFID tag 206 attached to the prefilled syringe 200 and a reader 31 of the syringe pump 100. FIG. 5 is a view showing an example of a method for obtaining a prefilled syringe 200 to which an information label 300 is attached. FIG. 6 is an enlarged front view of a part of the front view of the main body 3 of the syringe pump 100 shown in FIG. 1. FIG. 7 is a cross-sectional view of the prefilled syringe 200 and the syringe pump 100 shown in FIG. 1. More specifically, Fig. 7 is a cross-sectional view showing a cross section perpendicular to the axial direction of the pre-filled syringe 200 in a state in which the pre-filled syringe 200 is attached to the syringe pump 100. Fig. 8 is a perspective view showing a pre-filled syringe 600 of another embodiment.

[0029] 1, a drug solution administration system 1 of the present embodiment includes a syringe pump 100 and a pre-filled syringe 200 that can be attached to the syringe pump 100. Each of the components will be described below.

[0030] [Prefilled Syringe 200] First, a detailed description will be given of the pre-filled syringe 200. As shown in Fig. 2, the pre-filled syringe 200 includes a medicinal liquid 201, a barrel 202, a cap 203, a gasket 204, a plunger 205, and an RFID tag 206.

[0031] The medicinal liquid 201 is, for example, an anticancer drug, an anesthetic, a chemotherapy drug, a blood transfusion, a nutrient, etc. The medicinal liquid 201 is contained in a barrel 202. A minute amount of the medicinal liquid 201 is injected into the body of a patient, as described below.

[0032] The barrel 202 includes a cylindrical body portion 202a, a nozzle portion 202b, and a flange portion 202c.

[0033] Body 202a contains medicinal solution 201. Body 202a has an outer diameter D of 14 to 33 mm. The circumferential length of the outer circumferential surface of body 202a is 2.0 to 7.0 times the maximum circumferential length Lc of an antenna of RFID tag 206, which will be described later.

[0034] Nozzle portion 202b is provided on the tip side of body portion 202a. Tip opening 202b1 is provided at the tip of nozzle portion 202b. Medical solution 201 is discharged from tip opening 202b1. Tube 207 (shown by two-dot chain line in Figs. 1 and 2) can be connected to nozzle portion 202b.

[0035] The flange portion 202c protrudes outward in the radial direction B of the body portion 202a from the base end portion of the body portion 202a.

[0036] The cap 203 can seal the tip opening 202b1 provided at the tip of the nozzle portion 202b. The cap 203 can be attached to the nozzle portion 202b, and Fig. 2 shows a state in which the cap 203 is removed from the nozzle portion 202b and the tip opening 202b1 is open.

[0037] The gasket 204 slides on the inner circumferential surface of the body 202a. The gasket 204 in this embodiment is a cylindrical body with a closed tip and an open base. The gasket 204 forms a liquid medicine storage section in which the liquid medicine 201 is stored in the barrel 202. In this embodiment, the amount of the stored liquid medicine is 5 milliliters to 50 milliliters. In general, the amount of the stored liquid medicine (milliliters) corresponds to the outer diameter D (millimeters) of the prefilled syringe 200, and is specified in, for example, ISO 11040-6 (Prefilled syringes - Part 6: Plastic barrels for injectables). In this embodiment, in the case of a prefilled syringe that can store 5 milliliters of liquid medicine, the outer diameter D is 14 millimeters. In addition, in the case of a prefilled syringe that can store 10 milliliters of liquid medicine, the outer diameter D is 17 millimeters. In the case of a prefilled syringe that can store 20 milliliters of liquid medicine, the outer diameter D is 22 millimeters. Furthermore, when the amount of medicinal solution that can be stored is 50 milliliters, the outer diameter D is set to 33 millimeters.

[0038] The pusher 205 can be attached to the gasket 204. The pusher 205 includes a pusher body 205a and a flange portion 205b. In this embodiment, the tip portion of the pusher body 205a can be fixed to the gasket 204 in a state where it is inserted from the base end side of the gasket 204. The pusher body 205a and the gasket 204 can be fixed to each other by, for example, a screw connection. The pusher body 205a is inserted into the body portion 202a, and can move in the axial direction A of the body portion 202a within the body portion 202a. The flange portion 205b is a base end portion of the pusher 205 and protrudes outward in the radial direction B from the pusher body 205a.

[0039] In this embodiment, the RFID tag 206 is attached to the outer surface of the information label 300 described later. That is, the RFID tag 206 in this embodiment is attached to the outer circumferential surface of the body part 202a via the information label 300. Note that, in other embodiments, the information label 300 may be attached to the body part 202a of the barrel 202 so as to cover the outer surface of the RFID tag 206.

[0040] The RFID tag 206 is not attached over the entire area in the circumferential direction C of the body portion 202a, but is attached only to a part of the area in the circumferential direction C.

[0041] In this embodiment, the maximum axial length La of the RFID tag 206 along the axial direction A of the body 202a of the barrel 202 is 8 mm to 25 mm. In this embodiment, the base end of the RFID tag 206 is disposed 15 mm to 40 mm (for example, 24.8 mm) away from the tip of the flange portion 202c of the barrel 202 in the tip direction toward the tip side of the axial direction A of the body 202a. In this embodiment, the RFID tag 206 is disposed on the base end side of the tip of the gasket 204 in the axial direction A of the body 202a. Specifically, the RFID tag 206 of this embodiment is located on the base end side of the position of the tip of the gasket 204 of the prefilled syringe 200 in an unused state in the axial direction A of the body 202a. In other words, the RFID tag 206 of this embodiment is not located further on the tip side than the tip of the gasket 204 in the axial direction A of the body 202a. As shown in FIG. 1, in this embodiment, the portion where the clamp portion 5 of the syringe pump 100 clamps the outer peripheral surface of the prefilled syringe 200 (hereinafter referred to as the clamp abutment portion 209) is closer to the base end than the portion where the RFID tag 206 is affixed.

[0042] For example, the shape of RFID tag 206 may be a rectangle with a circumferential length Lc of 18 mm and an axial length La of 18 mm when the position is fixed relative to the outer circumferential surface of body 202a. Alternatively, for example, in the same state, the shape may be a rectangle with a circumferential length Lc of 25 mm and an axial length La of 25 mm. Also, in the same state, the shape may be a rectangle with a circumferential length Lc of 12 mm and an axial length La of 9 mm.

[0043] As shown in FIGS. 3 and 4, the RFID tag 206 includes a communication antenna 206a, a memory 206b, and a control unit 206c.

[0044] As shown in Fig. 3, the antenna 206a of the RFID tag 206 is composed of an antenna wire wound in a rectangular shape. As shown in Fig. 2, the area on the body 202a where the RFID tag 206 can be installed is limited, but by winding the antenna wire in a rectangular shape, it is easier to ensure a wide loop area formed by the antenna wire compared to a configuration in which the antenna wire is wound in a circular shape. As a result, as shown in Figs. 1 and 7, when the prefilled syringe 200 is installed on the support part 4 of the syringe pump 100, the RFID tag 206 of the prefilled syringe 200 and the reader 31 of the syringe pump 100 can communicate with each other even if they are not aligned with high accuracy.

[0045] The antenna 206a of the RFID tag 206 performs communication by short-range wireless communication such as NFC (Near Field Communication).

[0046] With the RFID tag 206 fixed in position relative to the outer circumferential surface of the body 202a of the barrel 202, the maximum circumferential length Lc of the antenna 206a of the RFID tag 206 along the circumferential direction C of the body 202a of the barrel 202 is 9 to 25 millimeters. For example, the outer edge of the antenna 206a may be rectangular with a circumferential length of 15 millimeters and an axial length of 15 millimeters in the same state as above. Alternatively, the outer edge of the antenna 206a may be rectangular with a circumferential length of 25 millimeters and an axial length of 25 millimeters in the same state as above.

[0047] The control unit 206c of the RFID tag 206 can read data from the memory 206b and transmit the data to the antenna 206a. The wireless communication between the antenna 206a of the RFID tag 206 and the reader antenna 31a of the reader 31 of the syringe pump 100 has a short communication distance (for example, within 35 mm). Therefore, when the RFID tag 206 of the prefilled syringe 200 is located at a predetermined distance or more away from the reader antenna 31a of the reader 31, the reader antenna 31a of the reader 31 cannot communicate with the RFID tag 206 of the prefilled syringe 200. The memory 206b and the control unit 206c of the RFID tag 206 can be configured, for example, by an integrated circuit (IC chip) including a nonvolatile memory.

[0048] As shown in FIG. 4, antenna 206a of RFID tag 206 receives electromagnetic waves transmitted from reader antenna 31a of reader 31 of syringe pump 100. From these electromagnetic waves, operating power of RFID tag 206 can be obtained. Control unit 206c reads data in memory 206b of RFID tag 206, and causes antenna 206a to transmit the data on electromagnetic waves to reader antenna 31a of reader 31 as a reply (transmission). Reader antenna 31a of reader 31 receives the electromagnetic waves from antenna 206a of RFID tag 206. Control unit 31c of syringe pump 100 then obtains the data stored in memory 206b of RFID tag 206 by extracting the data from the received electromagnetic waves, and causes storage unit 31b of syringe pump 100 to store the data.

[0049] Memory 206b of RFID tag 206 stores various data regarding prefilled syringe 200, such as the name of liquid medicine 201, identification data for each individual syringe, dimensional data of barrel 202, dimensional data of the stroke of plunger 205, and the like.

[0050] As shown in Fig. 2, an information label 300 is attached to the outer peripheral surface of the body part 202a of the barrel 202. Fig. 3 shows the information label 300 before being attached to the outer peripheral surface of the body part 202a.

[0051] The information label 300 has two graduations 301 arranged along the axial direction A of the body 202a when the information label 300 is attached to the outer circumferential surface of the body 202a (see FIG. 2). More specifically, the markings of the two graduations 301 in this embodiment are arranged along the axial direction A of the body 202a when the information label 300 is attached to the outer circumferential surface of the body 202a. The graduations 301 indicate the amount of the medicinal solution 201 in the body 202a when the information label 300 is attached to the outer circumferential surface of the body 202a. In this embodiment, as shown in FIG. 2, when the information label 300 is attached to the outer circumferential surface of the body 202a of the barrel 202, the two graduations 301 are symmetrical with respect to the central axis of the body 202a.

[0052] 3, an RFID tag 206 is attached between two graduations 301 of the information label 300. In this embodiment, the RFID tag 206 is attached to the outer surface of the information label 300. In other embodiments, the RFID tag 206 can be attached to the inner surface of the information label 300.

[0053] In this embodiment, a part of the RFID tag 206 overlaps a part of the two scales 301 in the longitudinal direction of the information label 300, and is disposed at a position shifted in the lateral direction of the information label 300. That is, as shown in Fig. 2, when the information label 300 is attached to the outer circumferential surface of the body part 202a, a part of the RFID tag 206 overlaps a part of the scales 301 in the axial direction A of the body part 202a of the barrel 202, and is disposed at a position shifted in the circumferential direction C of the body part 202a of the barrel 202.

[0054] In addition to the above-mentioned scale 301, the information label 300 may be provided with an information area 302 in which the name of the medicine or the amount of the liquid medicine is written.

[0055] An example of a method for obtaining a prefilled syringe 200 with an information label 300 attached thereto will be described with reference to FIG. 5. First, a roll-shaped mount 401 is pulled out. RFID tags 206 are placed at regular intervals on this mount 401. Next, as shown in region R1, various information is written on the RFID tag 206. Thereafter, as shown in region R2, the RFID tag 206 is removed from the mount 401 and attached to the outer surface of the information label 300. Then, the orientation of the information label 300 is appropriately set on the drum 402. Then, on the drum 403, the information written on the RFID tag 206 is inspected for correctness. Finally, the information label 300 is attached to the outer peripheral surface of the body 202a of the prefilled syringe 200 using the drum 404.

[0056] [Syringe Pump 100] Next, the syringe pump 100 will be described with reference to FIGS.

[0057] Syringe pump 100 is used, for example, in an intensive care unit, etc. Syringe pump 100 can also be used when performing a microinjection treatment of a medicinal liquid, such as an anticancer drug, an anesthetic agent, a chemotherapy agent, a blood transfusion, or a nutrient, for a patient P with high accuracy for a relatively long period of time.

[0058] Moreover, the syringe pump 100 of this embodiment is detachable from a stand or the like, and can be used in a state where it is attached to the stand, etc. The syringe pump 100 is fixed so that the axial direction A of the body 202a of the prefilled syringe 200 in the attached state is horizontal.

[0059] As shown in FIG. 1, the syringe pump 100 includes a syringe plunger drive unit 2, a main body unit 3, a support unit 4, and a clamp unit 5.

[0060] The syringe pusher drive unit 2 drives the pusher 205 of the prefilled syringe 200 in the distal direction toward the distal end side of the barrel 202a.

[0061] The syringe plunger driving portion 2 of this embodiment includes a pressing portion 2a and a flange fixing portion 2b.

[0062] The pressing portion 2a is disposed on the base end side in the axial direction A with respect to the flange portion 205b of the pusher 205 of the pre-filled syringe 200 in the mounted state. Then, by moving the pressing portion 2a toward the tip side in the axial direction A, the surface on the base end side in the axial direction A of the flange portion 205b can be pressed toward the tip side in the axial direction A. This allows the pusher 205 to be moved relatively toward the tip side in the axial direction A with respect to the barrel 202 of the pre-filled syringe 200 in the mounted state.

[0063] The flange fixing portion 2b fixes the flange portion 205b of the pusher 205 to the pressing portion 2a. Specifically, the flange fixing portion 2b in this embodiment is located on the tip side of the pressing portion 2a in the axial direction A and is attached to the pressing portion 2a. In the mounted state of the prefilled syringe 200, the flange portion 205b of the pusher 205 is disposed between the pressing portion 2a and the flange fixing portion 2b. This allows the pusher 205 to move in the axial direction A in accordance with the movement of the syringe pusher driving portion 2 in the axial direction A.

[0064] FIG. 6 is an enlarged front view of a part of the front view of the main body 3 of the syringe pump 100. More specifically, FIG. 6 shows an enlarged view of the position of the support part 4, which will be described later, that receives the prefilled syringe 200 in the main body 3. For convenience of explanation, FIG. 6 shows the barrel 202 of the prefilled syringe 200 that is properly received in the support part 4 with the flange part 202c fitted into the flange receiving groove 7 (see FIG. 1) of the main body 3. The main body 3 includes a reader 31 including a reader antenna 31a that receives a data set stored in the memory of the RFID tag 206 of the prefilled syringe 200, and a control part 13 (see FIG. 1) that controls the syringe plunger drive part 2. Specifically, the reader 31 and the control part 13 of this embodiment are disposed inside the main body 3. The control part 13 of the syringe pump 100 and the above-mentioned control part 31c can be separate components. Also, control unit 31c and control unit 13 may be integrated into a single component. In this embodiment, reader antenna 31a of reader 31 is composed of a reader antenna wire. As shown in FIG. 6, the outer edge of reader antenna 31a composed of a reader antenna wire is rectangular. In this embodiment, a part of reader antenna 31a of reader 31 is shifted in the axial direction A from a first region 3a1 described below that faces clamp unit 5 (see FIG. 1) of syringe pump 100 described below in a front view of support unit 4 of syringe pump 100 (the same as the front view of main body unit 3 in FIG. 6).

[0065] In this embodiment, the main body 3 has a first region 3a1 facing the clamp 5, and a second region 3a2 adjacent to the first region 3a1 in the axial direction A of the barrel 202a and disposed on the opposite side to the syringe plunger drive unit 2. At least a part of the reader antenna 31a of the reader 31 is disposed in the second region 3a2. In addition, in this embodiment, in a front view of the support 4 (the same as the front view of the main body 3 in this embodiment), a center line lca of the reader antenna 31a that is perpendicular to the axial direction A of the barrel 202a of the barrel 202 is disposed in the second region 3a2. Furthermore, in this embodiment, in a front view of the support 4, the center line lca of the reader antenna 31a overlaps with the antenna 206a of the RFID tag 206. In this embodiment, since the outer edge of the reader antenna 31a is rectangular, the center line lca of the reader antenna 31a is a line passing through the centers of two sides along the axial direction A of the body part 202a of the barrel 202 among the sides constituting the outer edge of the reader antenna 31a. In other words, the center line lca of the reader antenna 31a is a line that is perpendicular to the axial direction A of the body part 202a of the prefilled syringe 200 and bisects the loop area of ​​the reader antenna 31a. When the outer edge of the reader antenna is not rectangular, the line that is perpendicular to the axial direction of the body part of the prefilled syringe and bisects the loop area of ​​the reader antenna may be set as the center line.

[0066] The reader antenna 31a of the reader 31 can transmit electromagnetic waves when the prefilled syringe 200 is received by the support part 4 described later. The RFID tag 206 attached to the prefilled syringe 200 transmits data in response to the electromagnetic waves. The reader antenna 31a of the reader 31 can receive the data.

[0067] Furthermore, as shown in FIG. 1, the main body 3 of this embodiment includes a display unit 32 and an operation panel unit 33.

[0068] The display unit 32 is an image display device capable of color display. The display unit 32 can be configured, for example, with a color liquid crystal display device. The display unit 32 can display information not only in Japanese, but also in a plurality of foreign languages ​​as necessary. The display unit 32 of this embodiment is provided on the front side of the syringe pump 100, above the support unit 4 described below. The display unit 32 may be equipped with an input device such as a touch sensor to receive input from a user.

[0069] Operation panel unit 33 is disposed on the front side of syringe pump 100, above support unit 4, and to the right of display unit 32. A power switch 33A, an operation indicator 33H, and operation switches are disposed on operation panel unit 33. Fig. 1 shows, as examples of the operation switches, fast forward switch 33B, start switch 33C, stop switch 33D, display changeover switch 33E, back / mute switch 33F, and confirmation switch 33G.

[0070] The operations on the operation panel unit 33 are input to the control unit 13, and each part of the syringe pump 100 operates in response to commands from the control unit 13.

[0071] Furthermore, within the main body 3 of this embodiment, various wirings that electrically connect each component of the syringe pump 100, various mechanisms for executing commands from the control unit, a communication unit capable of wireless or wired communication with external devices other than the RFID tag 206, a memory unit that stores various data and programs necessary for the operation of the syringe pump 100, and the like are arranged.

[0072] As shown in FIG. 1, the support part 4 of this embodiment is formed on the front of the main body part 3. In addition, the support part 4 of this embodiment supports the outer peripheral surface of the body part 202a of the prefilled syringe 200 from a direction perpendicular to the central axis of the body part 202a. As shown in FIG. 7, the support part 4 of this embodiment is configured with a concave curved surface having a cross section of a substantially semicircular shape in order to receive the outer peripheral surface of the body part 202a. In addition, the support part 4 of this embodiment can receive a plurality of types of body parts 202a having different sizes such as outer diameters.

[0073] 1, the clamping portion 5 faces the supporting portion 4 formed on the main body portion 3, and clamps the barrel portion 202a of the prefilled syringe 200 between the clamping portion 5 and the supporting portion 4. In this embodiment, the clamping portion 209 (see FIG. 2), which is the portion of the outer circumferential surface of the barrel portion 202a where the clamping portion 5 clamps the prefilled syringe 200, is different from the portion where the RFID tag 206 is affixed and is closer to the base end than the portion where the RFID tag 206 is affixed.

[0074] 7, the clamp unit 5 is supported by the base 6 so as to be movable in the longitudinal direction of the base 6 (the direction parallel to the central axis O2). Therefore, by moving the clamp unit 5 in the longitudinal direction of the base 6, it is possible to change the opposing distance between the clamp unit 5 and the support unit 4 provided on the front side of the main body 3. This makes it possible to move the clamp unit 5 between a clamping position and a non-clamping position.

[0075] 7, the clamping position of the clamp part 5 is a position where the body part 202a of the prefilled syringe 200 is clamped between the clamp part 5 and the support part 4. The non-clamping position of the clamp part 5 is a position where the clamp part 5 is spaced farther from the support part 4 than the clamping position and does not clamp the body part 202a between the clamp part 5 and the support part 4.

[0076] The clamp portion 5 is constantly biased in the longitudinal direction of the base 6 by a biasing member such as a spring member in the direction approaching the support portion 4, so that when the clamp portion 5 is moved from the clamping position to the non-clamping position, it is moved against the biasing force of this biasing member.

[0077] Moreover, the clamp unit 5 is supported by the base 6 so as to be movable not only in the longitudinal direction of the base 6 but also in the circumferential direction around the central axis O2 of the base 6. This allows the longitudinal position of the base 6 to be fixed so that the clamp unit 5 does not move in the longitudinal direction of the base 6. Specifically, the clamp unit 5 is rotatable in the circumferential direction around the central axis O2 of the base 6 between a position facing the support unit 4 and a position not facing the support unit 4. This rotational movement is not possible when the clamp unit 5 is in the clamping position, but can be performed when the clamp unit 5 is in the non-clamping position. By setting the clamp unit 5 at an angle not facing the support unit 4, the prefilled syringe 200 can be easily placed on the receiving surface of the support unit 4.

[0078] The prefilled syringe 200 operates as follows when attached to the syringe pump 100 (see FIG. 1). The syringe pump 100 presses the plunger 205 toward the tip side in the axial direction A. This causes the gasket 204 connected to the plunger 205 to slide within the body 202a of the barrel 202 toward the tip side in the axial direction A.

[0079] When the gasket 204 slides in the body 202a toward the tip side in the axial direction A, the medicinal liquid 201 in the body 202a is compressed. The medicinal liquid 201 is discharged through the nozzle portion 202b of the body 202a by this compressive force. When the syringe pump 100 is in use, a tube 207 (see FIG. 1) is connected to the tip opening 202b1 of the nozzle portion 202b of the prefilled syringe 200. Also, as shown in FIG. 1, an indwelling needle 208 that is indwelled in the patient P is connected to the distal end of the tube 207. Therefore, the medicinal liquid 201 in the body 202a can be delivered into the body of the patient P through the tube 207 and the indwelling needle 208.

[0080] FIG. 8 shows a prefilled syringe 600 of another embodiment. The prefilled syringe 600 will be described below by comparing it with the prefilled syringe 200 shown in FIG. 2. The longitudinal length ratio of the information label 400 in FIG. 8 is smaller than the longitudinal length ratio of the information label 300 in FIG. 2. The longitudinal length ratio means the ratio of the total length of the information label in the axial direction A to the total length of the barrel in the axial direction A of the body. The RFID tag 206 in FIG. 8 has the same configuration as that shown in FIG. 2. However, the distance in the axial direction A between the flange portion 202c and the RFID tag 206 in FIG. 2 (for example, 24.8 mm) is larger than the distance in the axial direction A between the flange portion 202c and the RFID tag 206 in FIG. 6 (for example, 11 mm). In this embodiment, the clamp abutment portion 209 of the syringe pump 100 is located on the base end side of the portion to which the RFID tag 206 in FIG. 8 is attached. In other respects, the configuration of the prefilled syringe 600 is the same as the configuration of the prefilled syringe 200, so a description thereof will be omitted.

[0081] In the prefilled syringe 200 or 600 or the medicinal solution administration system 1 according to the embodiment of the present disclosure, the outer diameter D of the body 202a of the barrel 202 is 14 mm to 33 mm. The maximum circumferential length Lc of the antenna of the RFID tag 206 along the circumferential direction C of the body 202a of the barrel 202 is 9 mm to 25 mm. Furthermore, the circumferential length of the outer circumferential surface of the body 202a is 2.0 to 7.0 times the maximum circumferential length of the antenna of the RFID tag 206.

[0082] With these configurations, when the cylindrical prefilled syringe 200 or 600 is installed on the support part 4 of the syringe pump 100, even if the position of the RFID tag 206 of the prefilled syringe 200 and the position of the reader of the syringe pump 100 are not aligned, the RFID tag 206 and the reader 31 can communicate with each other. In addition, since alignment of the prefilled syringe 200 or 600 is not required, it is possible to suppress damage to the RFID tag 206 of the prefilled syringe 200 or 600 due to sliding between the RFID tag 206 fixed to the outer peripheral surface of the prefilled syringe 200 or 600 and the support part 4 of the syringe pump 100.

[0083] In addition, when attaching the RFID tag to the outer peripheral surface of the prefilled syringe, since the outer peripheral surface of the prefilled syringe is curved, there is a risk that the attached RFID tag will deform and peel off. In response to this, the above-mentioned configuration can suppress the peeling off of the RFID tag 206 attached to the outer peripheral surface of the prefilled syringe 200 or 600.

[0084] In the prefilled syringe 200 or 600 according to the embodiment of the present disclosure, the maximum axial length La of the RFID tag 206 along the axial direction of the body part 202a of the barrel 202 is 8 mm to 25 mm. By setting the maximum axial length La of the RFID tag 206 to 8 mm or more, when the cylindrical prefilled syringe 200 or 600 is installed on the support part 4 of the syringe pump 100, communication between the RFID tag 206 and the reader of the syringe pump 100 can be performed more reliably. In addition, by setting the maximum axial length La of the RFID tag 206 to 25 mm or less, it is possible to prevent the RFID tag 206 from making the scale 301 difficult to see and to prevent the RFID tag 206 from interfering with the visibility of the medicinal solution 201 contained in the body part 202a.

[0085] In the prefilled syringe 200 or 600 according to the embodiment of the present disclosure, the barrel 202 has a flange portion 202c protruding from the base end of the body portion 202a, and the body portion 202a has a clamp abutment portion 209 near the flange portion 202c against which the clamp portion 5 of the syringe pump 100 that drives the plunger 205 abuts, and the RFID tag 206 is disposed on the tip side of the clamp abutment portion 209 in the axial direction A of the body portion 202a. This prevents the clamp portion 5 of the syringe pump 100 from contacting the RFID tag 206, thereby preventing damage to the RFID tag 206.

[0086] In the prefilled syringe 200 or 600 according to the embodiment of the present disclosure, the distance between the base end of the RFID tag 206 and the tip of the flange portion 202c of the barrel 202 is 15 to 40 millimeters in the axial direction of the body portion 202a. By setting the distance between the base end of the RFID tag 206 and the tip of the flange portion 202c of the barrel 202 to 15 millimeters or more in the axial direction of the body portion 202a, the clamp portion 5 of the syringe pump 100 can be prevented from contacting the RFID tag 206, and damage to the RFID tag 206 can be prevented. In addition, by setting the distance between the base end of the RFID tag 206 and the tip of the flange portion 202c of the barrel 202 to 40 millimeters or less in the axial direction of the body portion 202a, it is possible to prevent the scale 301 from becoming difficult to see and ensure the visibility of the medicinal liquid 201 contained in the body portion 202a.

[0087] In the prefilled syringe 200 or 600 according to the embodiment of the present disclosure, the RFID tag 206 is disposed on the base end side of the tip of the gasket 204 in the axial direction A of the body 202a. This prevents the scale 301 from becoming difficult to see and ensures the visibility of the medicinal solution 201 contained in the body 202a.

[0088] The prefilled syringe 200 according to the embodiment of the present disclosure further includes an information label 300 attached to the body 202a of the barrel 202. The RFID tag 206 can be configured to be attached to the inner or outer surface of the information label 300. With these configurations, as shown in FIG. 5, when the prefilled syringe 200 is manufactured, the information label 300 and the RFID tag 206 can be attached to the barrel 202 at the same time, thereby improving the production efficiency of the prefilled syringe 200.

[0089] The prefilled syringe 200 may be configured to include an information label 300 attached to the body 202a of the barrel 202 so as to cover the outer surface of the RFID tag 206. This makes it possible to prevent the RFID tag 206 fixed to the outer circumferential surface of the body 202a from peeling off.

[0090] In the prefilled syringe 200 or 600 according to the embodiment of the present disclosure, the information label 300 has a scale 301 indicating the amount of the medicinal solution 201 in the body 202a along the axial direction A of the body 202a of the barrel 202, and at least a part of the RFID tag 206 overlaps with at least a part of the scale 301 in the axial direction A of the body 202a of the barrel 202 and is arranged at a position shifted in the circumferential direction C of the body 202a of the barrel 202. This allows the scale 301 and the RFID tag 206 to be provided on the prefilled syringe 200 or 600 without increasing the axial length of the prefilled syringe 200 or 600.

[0091] In the pre-filled syringe 200 or 600 according to the embodiment of the present disclosure, a plurality of graduations 301 are provided, and the RFID tag 206 is disposed between at least two graduations 301. This allows at least one graduation 301 to be exposed and visible when the pre-filled syringe 200 or 600 is installed in the syringe pump 100.

[0092] In the pre-filled syringe 200 or 600 according to the embodiment of the present disclosure, the at least two markings 301 are symmetrical with respect to the central axis of the body portion 202a of the barrel 202. This makes it possible to more reliably expose and view at least one marking 301.

[0093] In the drug solution administration system 1 according to the embodiment of the present disclosure, the syringe pump 100 has a clamp unit 5 that faces the support unit 4 and clamps the body 202a of the prefilled syringe 200 or 600 between the support unit 4 and the clamp unit 5, and when the clamp unit 5 clamps the prefilled syringe 200 or 600 between the support unit 4 and the clamp unit 5, the clamp abutment portion 209, which is a portion of the outer circumferential surface of the body 202a that is clamped by the clamp unit 5, is different from the portion to which the RFID tag 206 is attached. This prevents the clamp unit 5 of the syringe pump 100 from coming into contact with the RFID tag 206, thereby preventing damage to the RFID tag 206.

[0094] In the drug solution administration system 1 according to the embodiment of the present disclosure, the barrel 202 has a flange portion 202c protruding from the base end of the body portion 202a, and the distance between the base end of the RFID tag 206 and the tip of the flange portion 202c of the barrel 202 in the axial direction of the body portion 202a is 15 to 40 millimeters, and the clamp portion 5 abuts against the vicinity of the flange portion 202c of the body portion 202a to clamp the prefilled syringe 200 or 600 together with the support portion 4. In the axial direction of the body portion 202a, the distance between the base end of the RFID tag 206 and the tip of the flange portion 202c of the barrel 202 is 15 millimeters or more, and the clamp portion 5 of the syringe pump 100 abuts against the clamp abutment portion 209 in the vicinity of the flange portion 202c of the body portion 202a, thereby preventing the clamp portion 5 from contacting the RFID tag 206 and preventing damage to the RFID tag 206. In addition, by setting the distance between the base end of RFID tag 206 and the tip of flange portion 202c of barrel 202 in the axial direction of body portion 202a to 40 millimeters or less, it is possible to prevent scale 301 from becoming difficult to see and to ensure the visibility of medicinal solution 201 contained in body portion 202a.

[0095] In the drug solution administration system 1 according to the embodiment of the present disclosure, the main body 3 of the syringe pump 100 has a first region 3a1 facing the clamp unit 5 and a second region 3a2 adjacent to the first region 3a1 and arranged on the opposite side of the syringe plunger drive unit 2 in the axial direction A of the barrel 202a, and the reader 31 includes a reader antenna 31a composed of a reader antenna line that communicates with the antenna 206a of the RFID tag 206, and at least a part of the reader antenna 31a is arranged in the second region 3a2. In other words, at least a part of the reader antenna 31a is arranged in the second region 3a2, not in the first region 3a1 facing the clamp unit 5. With this configuration, the reader antenna 31a can reliably read the data set of the RFID tag 206. The prefilled syringe 200 or 600 is placed in the syringe pump 100 such that at least a portion of the RFID tag 206 faces the second region 3a2.

[0096] In the drug solution administration system 1 according to the embodiment of the present disclosure, the center line lca of the reader antenna 31a, which is perpendicular to the axial direction of the body 202a of the barrel 202 in a front view of the support part 4, is disposed in the second region 3a2, and the center line lca of the reader antenna 31a overlaps with the antenna of the RFID tag 206 in a front view of the support part 4. Here, it is preferable that the position of the center line lca of the reader antenna 31a is almost the same as the position where the magnetic flux density of the magnetic flux generated by the reader antenna 31a is the highest. Therefore, by overlapping the center line lca of the reader antenna 31a with the antenna of the RFID tag 206, the reader 31 can more reliably read the data set of the RFID tag 206.

[0097] The syringe pump 100 according to the embodiment of the present disclosure has a clamping portion 5 that faces the support portion 4 and clamps the body portion 202a of the prefilled syringe 200 between the support portion 4, and the main body portion 3 of the syringe pump 100 has a first region 3a1 that faces the clamping portion 5 of the body portion 202a, and a second region 3a2 that is adjacent to the first region 3a1 in the axial direction A of the body portion 202a and is arranged on the opposite side to the syringe plunger driving portion 2, and the reader 31 includes a reader antenna 31a composed of a reader antenna line that communicates with the antenna of the RFID tag 206, and at least a part of the reader antenna 31a is arranged in the second region 3a2. As a result, since at least a part of the reader antenna 31a is arranged in the second region 3a2, not the first region 3a1 that faces the clamping portion 5, the reader antenna 31a can read the data set of the RFID tag 206. Furthermore, when the prefilled syringe 200 is clamped between the support part 4 and the clamp part 5, it is possible to prevent the RFID tag 206 from coming into contact with the clamp part 5 and being damaged. The prefilled syringe 200 or 600 is installed in the syringe pump 100 such that at least a part of the RFID tag 206 is positioned opposite the second region 3a2.

[0098] Furthermore, in syringe pump 100 according to the embodiment of the present disclosure, center line lca of reader antenna 31a, which is perpendicular to body portion 202a of barrel 202 in a front view of support portion 4, is disposed in second region 3a2. This allows reader 31 to reliably read data of RFID tag 206 of syringe pump 100. EXAMPLES

[0099] Next, a prefilled syringe according to an embodiment of the present disclosure was prototyped and its performance was evaluated, which will be described below.

[0100] In this embodiment, six prefilled syringes 1-6 with different outer diameters of the barrel body were prototyped. The outer diameters of the barrel bodies of the prefilled syringes 1-6 are 11 millimeters, 14 millimeters, 17 millimeters, 22 millimeters, 33 millimeters, and 35.5 millimeters respectively.

[0101] <Verification regarding RFID tag attachment> RFID tags 1-6 were attached to the outer peripheral surfaces of the barrel bodies of the prefilled syringes 1-6 respectively, and then it was verified whether they would peel off or not. The shape of the tag body including the antenna, memory, and control unit of RFID tags 1-5, and the outer edge of the antenna wire are rectangular. Also, the shape of the tag body of RFID tag 6 is circular with an outer diameter of 28 millimeters, and the outer edge of the antenna wire is circular with an outer diameter of 25 millimeters. Table 1 shows the dimensions of the tag bodies of RFID tags 1-6 and the dimensions of the antennas. Table 1 also shows the value obtained by dividing the circumferential length of the outer peripheral surface of the barrel body of the prefilled syringe by the maximum circumferential length of the antenna of the RFID tag (described as "syringe-tag circumferential length ratio" in Table 1). In this embodiment, RFID tags 1-6 were attached to the outer peripheral surfaces of the barrel bodies of the prefilled syringes 1-6, and then it was verified whether they would peel off or not. "○" in Table 1 indicates the case where the RFID tag did not peel off. "×" indicates the case where the size of the RFID tag was too large to be attached, or the case where the RFID tag peeled off after being attached, etc. In other words, it indicates the case where the RFID tag could not be properly attached to the prefilled syringe.

[0102] <Verification regarding RFID tag reading> Each of the prefilled syringes 1-6 was installed in the syringe pump 100 shown in FIG. 1 with the RFID tag 1-6 attached to the outer peripheral surface of the body of the barrel of the prefilled syringe 1-6. Here, the attached RFID tag 1-6 was placed at the position farthest from the reader 31 of the syringe pump 100, that is, so that the RFID tag 206 faces the front side in FIG. 1. In this state, it was verified multiple times whether the reader 31 of the syringe pump 100 could read the data of the RFID tag 1-6. "○" in Table 1 indicates that the data of the RFID tag could be read in all cases. "△" indicates that there were cases where the data of the RFID tag could not be read. Furthermore, "-" indicates that this verification was not performed because the RFID tag could not be properly attached to the outer peripheral surface of the body of the barrel of the prefilled syringe.

[0103] [Table 1]

[0104] As is clear from Table 1, it was found that all of the prefilled syringes in which the antenna is composed of an antenna wire wound in a rectangular shape, the outer diameter of the barrel body is 14 mm to 33 mm, the maximum circumferential length Lc of the RFID tag antenna along the circumferential direction of the barrel body a is 9 mm to 25 mm, and the circumferential length of the outer surface of the body is 2.0 to 7.0 times the maximum circumferential length of the antenna of the RFID tag 206 are easier for the syringe pump to acquire data and the affixed RFID tag is less likely to peel off than other prefilled syringes. [Explanation of symbols]

[0105] 1: Drug administration system 200,600: Prefilled syringe 201: Chemical solution 202: Barrel 202a: Torso 202b: Nozzle section 202b1: Tip opening 202c: Flange part 203: Cap 204: Gasket 205: Pusher 205a: Push bar body 205b: Flange part 206: RFID tag 206a: Antenna 206b:Memory 206c: Control section 207: Tube 208: Indwelling needle 209: Clamp contact part 100: Syringe pump 13: Control unit 2: Syringe plunger drive unit 2a: Pressing part 2b: Flange fixing part 3: Main body 31: Leader 31a: Reader antenna 31b:Memory 31c: Control section 32: Display section 33: Operation panel section 33A: Power switch 33B: Fast forward switch 33C: Start switch 33D: Stop switch 33E: Display changeover switch 33F: Mute switch 33G: Confirmation switch 33H: Operation indicator 3a1: 1st area 3a2:Second area 4: Support part 5: Clamp section 6: Bass 7: Flange receiving groove 300,400: Information label 301: Scale 302: Information area A: Axial direction of the body B: Radial direction of the body C: Circumferential direction of the body D: Outer diameter of the body La: Axial length of the RFID tag Lc: Circumferential length of the RFID tag O2: Central axis P:Patient lca: center line

Claims

1. A prefilled syringe to be installed in a syringe pump, A drug solution, A barrel having a cylindrical body portion containing the chemical solution and a nozzle portion provided at a tip side of the body portion and discharging the chemical solution; a cap for sealing a tip opening provided at the tip of the nozzle portion; A gasket that slides on an inner circumferential surface of the body portion; A pusher that can be attached to the gasket; an RFID tag having a communication antenna and a memory, the communication antenna being formed of an antenna wire wound in a rectangular shape, the RFID tag being fixed in position relative to an outer circumferential surface of the body; A scale for a liquid medicine is provided on the body portion along the axial direction, The syringe pump comprises: A syringe pusher driving unit that drives the pusher of the prefilled syringe in a distal direction toward the distal end side of the barrel; A main body unit including a reader that reads the data set stored in the memory of the RFID tag of the prefilled syringe and a control unit that controls the syringe plunger drive unit; A support portion that supports the outer peripheral surface of the body portion of the prefilled syringe in a direction perpendicular to the axis of the body portion; A clamp portion that faces the support portion and clamps the base end side of the barrel of the prefilled syringe between the support portion and the clamp portion, the reader includes a reader antenna configured with a reader antenna line that communicates with the antenna of the RFID tag; The barrel of the prefilled syringe has a flange portion protruding from a base end portion of the body portion, the body portion has a clamp abutment portion adjacent to the flange portion, the clamp abutting the clamp portion of the syringe pump; the RFID tag is disposed on a tip side of the clamp abutment portion in an axial direction of the body portion, the antenna of the RFID tag overlaps with a center line of the reader antenna, A prefilled syringe, wherein the RFID tag is located on the base end side of the tip of the gasket of an unused prefilled syringe in the axial direction of the barrel.

2. 2. The pre-filled syringe of claim 1, wherein a maximum axial length of the RFID tag along an axial direction of the body of the barrel is between 8 millimeters and 25 millimeters.

3. The prefilled syringe according to claim 2, wherein the distance between the base end of the RFID tag and the tip of the flange portion of the barrel in the axial direction of the body is 15 to 40 millimeters.

4. The outer diameter of the body of the barrel is between 14 millimeters and 33 millimeters; a maximum circumferential length of the antenna of the RFID tag along a circumferential direction of the body of the barrel is between 9 millimeters and 25 millimeters; The prefilled syringe according to any one of claims 1 to 3, wherein the circumferential length of the outer circumferential surface of the body of the barrel is 2.0 to 7.0 times the maximum circumferential length of the antenna of the RFID tag.

5. an informational label attached to the body of the barrel; The prefilled syringe according to claim 1 , wherein the RFID tag is attached to an inner or outer surface of the information label.

6. 5. The prefilled syringe of claim 1, further comprising an information label attached to the body of the barrel so as to cover an outer surface of the RFID tag.

7. The information label has the scale provided along an axial direction of the body portion of the barrel, The prefilled syringe according to claim 5 or 6, wherein the RFID tag is arranged at a position offset from the scale in a circumferential direction of the body part of the barrel.

8. A plurality of the scales are provided, 8. The pre-filled syringe of claim 7, wherein the RFID tag is disposed between at least two of the graduations.

9. 9. The pre-filled syringe of claim 8, wherein the at least two graduations are symmetrical about a central axis of the body of the barrel.

Images