Chemical solution administration device, its control method, and chemical solution administration system

Abstract

This medicinal solution administration device comprises: a reservoir; a flow path which is connected to the reservoir and guides the medicinal solution out of the reservoir; a plunger which can move in the longitudinal direction of the reservoir; a movable unit which moves and can thus press the plunger to the distal end side of the reservoir; a driving unit which moves the movable unit; a battery which supplies electric power; and a control unit. The reservoir is provided on a disposable cartridge which is removably connected to the medicinal solution administration device. The control unit calculates the number of replaceable times, which is the number of replaceable times of the cartridge, on the basis of a priming power amount which is a power amount required to move the movable unit until the flow path of the medicinal solution administration device is filled with a medicinal solution, a liquid feed power amount which is a power amount required to administer the medicinal solution filled in the reservoir, and a power amount remaining in the battery, and presents the calculated number of replaceable times to a user.

Description

[Technical Field]

[0001] The present disclosure relates to a drug solution administration device, a control method thereof, and a drug solution administration system. [Background technology]

[0002] There are known drug administration devices that administer drug solutions such as insulin into the body of a patient. For example, Patent Document 1 describes a therapeutic drug injection device that transmits an indication of the current remaining battery level to a handset (paragraph

[0017] ). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Special Publication No. 2017-504424 Summary of the Invention [Problem to be solved by the invention]

[0004] It is conceivable that a drug solution administration device may be configured with a disposable cartridge (disposable part) having a structure for filling the drug solution and a reusable device main body (reusable part), and be driven by power from a battery provided in the device main body. In conventional drug solution administration devices, there is room for improvement in the accuracy of measuring the number of times that the drug solution administration device can be operated by replacing the cartridge without charging the battery.

[0005] An object of the present disclosure is to provide a medicinal liquid administration device, a control method thereof, and a medicinal liquid administration system that are capable of measuring with higher accuracy than the number of times a cartridge can be replaced. [Means for solving the problem]

[0006] a drive unit that moves the movable unit in the movable area; a battery that supplies power to drive the drive unit; and a control unit. The control unit calculates the number of times the cartridge can be replaced, based on a priming power amount that is the amount of power required to move the movable unit until the flow path of the drug solution administration device is filled with the drug solution, a liquid delivery power amount that is the amount of power required to administer the drug solution filled in the reservoir, and the amount of power remaining in the battery, and presents the calculated number of times the cartridge can be replaced to a user.

[0007] In one embodiment, the drive unit moves the movable part by transmitting a driving force based on the rotation of a motor, and the control unit estimates the priming power amount and the liquid delivery power amount based on the number of rotations of the motor rotated to move the movable part until the flow path of the liquid medicine administration device is filled with the liquid medicine.

[0008] In one embodiment, the control unit calculates the number of times the battery can be replaced by dividing the amount of power remaining in the battery by the sum of the amount of power used for priming and the amount of power used for liquid delivery.

[0009] In one embodiment, the control unit causes a display device to display the calculated number of possible exchanges.

[0010] A medicinal liquid administration system according to one embodiment of the present disclosure includes the medicinal liquid administration device and a remote control for a user to operate the medicinal liquid administration device.

[0011] A control method for a drug solution administration device according to one embodiment of the present disclosure includes: a reservoir filled with a drug solution provided in a detachably connected disposable cartridge; a flow path connected to the reservoir and leading the drug solution out of the reservoir; a plunger movable in the longitudinal direction of the reservoir; a movable part capable of pressing the plunger toward the tip of the reservoir by moving within a movable area; a drive part that moves the movable part within the movable area; a battery that supplies power for driving the drive part; and a control unit, and the drug solution filled in the reservoir is administered into a living body by the pressing action of the plunger, the control unit including the steps of: calculating a number of times the cartridge can be replaced, based on a priming power amount that is the amount of power required to move the movable part until the flow path is filled with the drug solution; a liquid delivery power amount that is the amount of power required to administer the drug solution filled in the reservoir; and an amount of power remaining in the battery; and presenting the calculated number of times the cartridge can be replaced to a user. [Effects of the Invention]

[0012] According to an embodiment of the present disclosure, it is possible to perform measurements with higher accuracy than the number of times the cartridge can be replaced. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a diagram illustrating an example of a drug solution administration system according to an embodiment. [Figure 2] FIG. 2 is a diagram showing an example of a perspective view of the drug solution administration device of FIG. 1. [Figure 3] FIG. 2 is a diagram showing an example of a perspective view of the drug solution administration device of FIG. 1 in a separated state. [Figure 4] FIG. 4 is an example of an exploded perspective view of the pump body of FIG. 3. [Figure 5] 10A and 10B are diagrams illustrating an example of a cartridge in a state where a nut portion is in a non-contact position. [Figure 6] FIG. 10 is a diagram showing an example of a cartridge with a nut portion in a predetermined position. [Figure 7] 2 is a block diagram showing an example of a configuration related to control of the chemical liquid administration device of FIG. 1. FIG. [Figure 8] 2 is a block diagram showing an example of a hardware configuration of the remote control of FIG. 1. [Figure 9] 2 is a flowchart showing the operation procedure of the drug solution administration device of FIG. 1. [Figure 10] 10 is a flowchart showing the procedure of the rotation speed measurement process of FIG. 9. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings. In each drawing, parts having the same configuration or function are denoted by the same reference numerals. In the description of this embodiment, duplicated descriptions of the same parts may be omitted or simplified as appropriate.

[0015] (Configuration of drug administration system) 1 is a diagram showing an example of a medicinal liquid administration system 100 according to one embodiment. The medicinal liquid administration system 100 administers a medicinal liquid such as insulin into a living body of a patient. The medicinal liquid administration system 100 includes a medicinal liquid administration device 1 and a remote control 90.

[0016] As will be described later with reference to FIG. 4 etc., the drug solution administration device 1 is a device that continuously or intermittently administers a drug solution filled in a reservoir (syringe) 18 into a living body by the pressing action of a plunger 20. The drug solution administration device 1 may be, for example, a portable device that can be attached to the abdomen or the like of a patient (patch type). However, the drug solution administration device 1 is not limited to the patch type and may also be a tube type or the like.

[0017] The remote control 90 is a device that allows a user, such as a patient, to operate the medicinal liquid administration device 1. The remote control 90 notifies the user of information received from the medicinal liquid administration device 1 and accepts user operations on the medicinal liquid administration device 1. In this embodiment, the remote control 90 is realized by a dedicated device compatible with the medicinal liquid administration device 1, but it may also be realized by a general-purpose information processing device such as a smartphone or tablet. Also, in this embodiment, an example is described in which the remote control 90 serves as a user interface for notifying the user of information and accepting information input from the user, but instead, all or part of the functions of the user interface may be provided in the medicinal liquid administration device 1.

[0018] The medicinal liquid administration device 1 and the remote control 90 are communicably connected to each other via a wireless communication line, a wired communication line, or a combination thereof. An example in which the medicinal liquid administration device 1 and the remote control 90 are communicably connected to each other via Bluetooth (registered trademark) will be described below.

[0019] (Configuration of drug solution administration device) Fig. 2 is a diagram showing an example of a perspective view of the medicinal liquid administration device 1 of Fig. 1. Fig. 3 is a diagram showing an example of a perspective view of the medicinal liquid administration device 1 of Fig. 1 when separated. The medicinal liquid administration device 1 has a pump body 10, a cradle device 11 to which the pump body 10 is detachably attached, and a connection port 106 attached to the cradle device 11. The pump body 10 and the cradle device 11 have a structure in which they engage with each other and can be repeatedly detached.

[0020] The pump body 10 includes a housing 111 that houses each component of the medicinal solution administration device 1, such as the reservoir 18 and the plunger 20. As illustrated in FIGS. 1 and 2, the housing 111 may be formed in a flat, approximately rectangular parallelepiped shape with rounded corners. An upper surface 121 of the housing 111 is one surface of the pump body 10 that is located opposite the side that is attached to the cradle device 11. The upper surface 121 may be formed in a substantially rectangular shape with rounded corners when viewed from above. A front surface 123 and a back surface 124 that face each other are connected substantially vertically to an end of the upper surface 121 in a first direction. A side surface 126 is connected substantially vertically to an end of the upper surface 121 in a second direction.

[0021] As shown in FIG. 3 , pump body 10 may have an engagement structure at side surface portion 126 that allows pump body 10 and cradle device 11 to be repeatedly detached from each other. The engagement structure may include, for example, a hook mechanism. Specifically, side surface portion 126 may be formed with guide groove portion 137 and engagement hook portion 138. Engagement hook portion 138 may be formed on a side closer to back surface portion 124 than guide groove portion 137. Engagement hook portion 138 may be detachably engaged with an engagement receiver 162 of cradle device 11, which will be described later.

[0022] Cradle device 11 is configured to be able to support pump body 10. As shown in Figures 2 and 3, cradle device 11 has a substantially flat mounting surface 141 and side walls 143, 144. Mounting surface 141 is formed in a substantially rectangular shape with curved corners when viewed from above. When pump body 10 is attached to cradle device 11, the bottom surface of housing 111 of pump body 10 is placed on mounting surface 141.

[0023] A detection rail 152, a sliding rail 153, and a mounting portion 155 may be provided on one surface of the mounting surface portion 141. The connection port 106 may be attached to the mounting portion 155. The mounting portion 155 may be provided with an insertion hole through which the cannula of the connection port 106 passes.

[0024] The detection rail 152 is a protrusion that protrudes from one surface of the mounting surface 141. The detection rail 152 is used by the pump main body 10 to detect the attachment of the cradle device 11. The thickness of the detection rail 152 gradually increases from the mounting surface 141 toward the side wall 144. The detection rail 152 extends a predetermined length parallel to the side wall 143. When the pump main body 10 is attached to the cradle device 11, the detection rail 152 enters a detection groove provided in the pump main body 10 and presses an attachment detection switch (not shown). The pump main body 10 detects the attachment of the cradle device 11 based on the pressing of the attachment detection switch.

[0025] The sliding rail 153 extends parallel to the side wall 143 on one surface of the mounting surface 141. When the pump body 10 is attached to the cradle device 11, a sliding groove (not shown) provided on the bottom surface of the pump body 10 is slidably fitted into the sliding rail 153.

[0026] A side wall 144 extends substantially vertically from the end of the mounting surface 141 in the first direction. Opposing side walls 143 extend substantially vertically from the end of the mounting surface 141 in the second direction. When the pump body 10 is attached to the cradle device 11, the side wall 143 faces the side surface 126 of the housing 111 of the pump body 10. The side wall 144 faces the front surface 123 of the housing 111.

[0027] 3, cradle device 11 may have a fitting hole 154, which is an opening, in side wall portion 144. When pump body 10 is attached to cradle device 11, a fitting protrusion provided on front surface portion 123 of pump body 10 may fit into fitting hole 154.

[0028] Side wall portion 143 may be formed with guide rails 151, posture correction portion 156, and engagement receiving portion 162. Engagement receiving portion 162 may be an opening formed by cutting out a substantially rectangular shape from side wall portion 143. When pump body 10 is attached to cradle device 11, engagement hook portion 138 may detachably engage with engagement receiving portion 162.

[0029] As shown in Fig. 3, the guide rail 151 is a protrusion formed on the side wall portion 143. The protrusion of the guide rail 151 does not necessarily have to extend continuously. For example, as shown in Fig. 3, a notch 158 may be appropriately provided midway along the guide rail 151. When pump body 10 is mounted on cradle device 11, guide rail 151 engages with guide groove 137 provided on side surface 126 of pump body 10. This guides the mounting direction of pump body 10.

[0030] 2 and 3, posture correction portion 156 is a plate-shaped protrusion extending upward from side wall portion 143. Posture correction portion 156 may have a curved shape corresponding to the shape of the connection portion (corner) between top surface portion 121 and side surface portion 126 of housing 111 of pump body 10.

[0031] The cradle device 11 may be provided with an adhesive sheet to be attached to the patient's skin. The adhesive sheet may be attached to the other surface opposite to one surface of the mounting surface portion 141 of the cradle device 11. The adhesive sheet may have an opening (not shown) through which a cannula of the connection port 106, which will be described later, passes. The adhesive sheet may be made of a flexible material. The adhesive sheet may form an adhesive layer to be attached to the patient's skin on the surface opposite to the mounting surface portion 141. Before being attached to the patient's skin, the adhesive layer of the adhesive sheet may be covered with release paper.

[0032] The connection port 106 may have a port body 181 capable of holding a cannula therein. The port body 181 may have a cylindrical connection portion. When a cannula is connected, the interior of the connection portion (cylindrical bore), the port body 181, and the cannula communicate with each other. A cap 182 is attached to the tip of the connection portion, and the other end of the connection portion is connected to the port body 181. The cap 182 seals the tip opening of the connection portion. This isolates the interior of the connection port 106 from the external environment.

[0033] When the connection port 106 is attached to the attachment part 155 of the cradle device 11 using a puncture mechanism (not shown), the cannula penetrates the mounting surface part 141 together with the puncture needle and protrudes to the other surface of the mounting surface part 141 (the surface to be attached to the skin).The cannula is then inserted into the living body together with the puncture needle.The puncture needle is then removed, and the cannula is left in the living body.

[0034] The connection portion of the port body 181 may face upstream in the mounting direction. The connecting needle tube exposed to the outside of the pump body 10 is fluidly connected to the outlet tube 29. The connecting needle tube enters the cylindrical bore by puncturing the septum surface of the cap 182. This connects the port body 181 to the outlet tube 29 (see FIG. 5, etc.) of the pump body 10, and fluidly connects the outlet tube 29 to the cannula. When the drive unit 40 (see FIG. 5, etc.) is driven, the medicinal liquid stored in the reservoir 18 of the pump body 10 is sent to the connection port 106 via the outlet tube 29 and administered to the patient from the cannula. In other words, the outlet tube 29 connects to the reservoir 18 and functions as a flow path for delivering the medicinal liquid to the outside of the reservoir 18. When the connecting needle tube is connected to the outlet tube 29, the flow path of the medicinal liquid administration device 1 may include the outlet tube 29 and the connecting needle tube.

[0035] (Pump body configuration) Fig. 4 is an example of an exploded perspective view of the pump body 10 of Fig. 3. Fig. 5 is an example of the cartridge 12 in a state where the nut portion 24 is in a non-contact position. Fig. 6 is an example of the cartridge 12 in a state where the nut portion 24 is in a predetermined position.

[0036] As shown in Figure 4, the pump body 10 includes a disposable cartridge 12 and a reusable device body 14. The cartridge 12 includes a base portion 16 in the shape of a flat box with one side open. The base portion 16 has a generally rectangular shape in plan view. The base portion 16 may be detachably attached to a cradle device 11 that can be attached to the patient's skin.

[0037] As shown in Figure 4, the base portion 16 is provided with a reservoir 18 filled with a medicinal solution, a plunger 20 provided within the reservoir 18, a feed screw shaft 22 arranged coaxially with the plunger 20, and a nut portion (movable portion) 24 threaded onto the feed screw shaft 22.

[0038] Reservoir 18 extends cylindrically in the longitudinal direction of base portion 16. The outer and inner diameters of the distal end of reservoir 18 taper toward the distal end. The distal end of reservoir 18 is formed with an introduction port 26 for introducing the medicinal liquid into reservoir 18 and an outlet port 28 (see FIG. 5) for discharging the medicinal liquid from reservoir 18. An outlet tube 29 that guides the medicinal liquid from reservoir 18 to the cannula is connected to outlet port 28.

[0039] The plunger 20 is integrally molded from a resin material or the like, and is provided within the reservoir 18 so as to be liquid-tight and slidable along the axial direction of the reservoir 18. The plunger 20 has a plunger body 30 that forms the tip side, and a pusher 32 that is provided on the plunger body 30 and forms the rear end side. A seal member 34 that is slidable within the reservoir 18 is attached to the cylindrical rear end side of the plunger body 30.

[0040] The pusher 32 has a pair of extensions 36 that extend rearward from the plunger body 30 to the outside of the reservoir 18, and a pair of claws 38 provided at the rear ends of the extensions 36. One end of the feed screw shaft 22 is journaled by a bearing 39, and constitutes a drive unit 40 that moves the nut unit 24.

[0041] The drive unit 40 further includes a battery 42 as a power source, a motor 44 driven by the battery 42, a gearbox (power transmission mechanism) 46 that reduces the rotational driving force of the motor 44 and transmits it, and a transmission shaft 52 to which a spur gear 50 that meshes with an output gear 48 of the gearbox 46 is fixed and which is engaged with the feed screw shaft 22 so as to be able to rotate integrally with the feed screw shaft 22.

[0042] In this embodiment, the transmission shaft 52 is provided in the cartridge 12, and the battery 42, motor 44, and gear box 46 are provided in the device body 14. By providing the battery 42, motor 44, and gear box 46 in the device body 14, which can be reused, it is possible to reduce the cost of the cartridge 12. In this case, the battery 42 may be a secondary battery.

[0043] The battery 42 is provided with terminals 54 that are electrically connected to the motor 44. The transmission shaft 52 is supported by a pair of bearings 56 provided on the base portion 16 in a state where it is disposed coaxially with the feed screw shaft 22.

[0044] When the motor 44 rotates, its rotational force is transmitted to the feed screw shaft 22, and the rotation of the feed screw shaft 22 causes the nut portion 24 to move toward or away from the plunger 20. Hereinafter, rotation of the motor 44 that moves the nut portion 24 toward the plunger 20 will be referred to as "forward rotation," and rotation of the motor 44 in the direction opposite to the forward rotation will be referred to as "reverse rotation." The motor 44 is configured to be capable of both forward and reverse rotation. The motor 44 is configured so that if a force (torque) greater than a certain level is applied to the forward or reverse rotation, the rotational drive force is not transmitted to the components below the gear box 46. For example, a stepping motor may be used as the motor 44. If a stepping motor is used, and a force greater than a certain level is applied to the forward or reverse rotation, the motor 44 will no longer synchronize with the input pulse and will no longer transmit the rotational drive force (losing synchronization). For example, if the motor 44 rotates in the reverse direction while the nut portion 24 is in contact with the rearmost end of the feed screw shaft 22 on the bearing 56 side, it is possible to prevent damage to mechanisms such as the motor 44, gear box 46, and transmission shaft 52 due to excessive force being applied due to step-out. A rotary encoder (not shown) is provided on the output shaft of the motor 44, and it is possible to determine whether the motor 44 has lost synchronization with the input pulse (step-out) by detecting the rotation of the motor 44 with the rotary encoder. The operating state of the motor 44 is transmitted to the control unit 71.

[0045] The nut portion 24 is integrally molded from a resin material and has a nut portion main body 58 formed in a substantially rectangular parallelepiped shape, and a slide portion 60 provided on the nut portion main body 58. The nut portion main body 58 is formed with a threaded hole 62 into which the feed screw shaft 22 screws, and a pair of through holes 64 formed on either side of the threaded hole 62 and through which the claw portions 38 pass. A reinforcing cover 66 made of, for example, a metal material or the like is attached to the outer surface of the nut portion main body 58.

[0046] The slide portion 60 slides relative to a guide wall 68 that is provided on the base portion 16 and extends along the axial direction of the plunger 20. That is, before use, the nut portion 24 is in a non-contact position where it does not contact the plunger 20 (see FIG. 5), and by the rotation of the feed screw shaft 22, it moves from the non-contact position to a contact position (hereinafter referred to as the "initial position") where the nut portion 24 and plunger 20 are engaged. After contacting the plunger 20, further rotation of the feed screw shaft 22 causes the nut portion 24 to press the plunger 20 toward the tip end (see FIG. 6). The guide wall 68 may be provided with a restricting portion that functions as a stopper to prevent the slide portion 60 from moving further backward.

[0047] As shown in FIGS. 4 to 6, the device main body 14 includes a cover that is detachably attached to the base 16 so as to close the opening of the base 16, as well as a control unit 71, a storage unit 72, and a communication unit 73. The cover may be provided on the top surface 121 of the housing 111. The control unit 71 is electrically connected to the battery 42, the motor 44, the storage unit 72, and the communication unit 73 via a bus 79 (see FIG. 7). The control unit 71 controls each unit of the medicinal liquid administration device 1 to perform processes related to the operation of the medicinal liquid administration device 1. For example, the control unit 71 controls the drive of the motor 44 based on information related to medicinal liquid administration transmitted from a remote control 90.

[0048] Fig. 7 is a block diagram showing an example of a configuration related to control of the medicinal solution administration device 1 of Fig. 1. As described above, the battery 42, the motor 44, the storage unit 72, and the communication unit 73 are electrically connected to the control unit 71 via the bus 79.

[0049] The control unit 71 is one or more processors. The control unit 71 is communicably connected to each component of the medicinal liquid administration device 1 and controls the operation of the entire medicinal liquid administration device 1. The processor is a general-purpose processor such as a CPU (Central Processing Unit), or a dedicated processor specialized for a specific process. The control unit 71 may include one or more dedicated circuits, or the one or more processors in the control unit 71 may be replaced with one or more dedicated circuits. The dedicated circuit is, for example, an FPGA (Field Programmable Gate Array).

[0050] The storage unit 72 is one or more semiconductor memories, one or more magnetic memories, one or more optical memories, or a combination of at least two of these. The semiconductor memories are, for example, RAM (Random Access Memory) or ROM (Read Only Memory). The storage unit 72 functions as, for example, a main storage device, an auxiliary storage device, or a cache memory.

[0051] The communication unit 73 is a communication interface for communicating with the remote control 90. In this embodiment, the communication unit 73 communicates with the remote control 90 via Bluetooth (registered trademark), but this is not limiting, and communication may be via other wireless communication paths such as a wireless LAN (Local Area Network) or a wired cable, for example.

[0052] The control of the medicinal liquid administration device 1 may be performed by executing a program on a processor included in the control unit 71. That is, the control of the medicinal liquid administration device 1 may be realized by software. In this case, the program causes a computer to execute processing of steps included in the operation of the medicinal liquid administration device 1, thereby causing the computer to realize functions corresponding to the processing of those steps. Alternatively, some or all of the functions of the medicinal liquid administration device 1 may be realized by a dedicated circuit included in the control unit 71. That is, some or all of the functions of the medicinal liquid administration device 1 may be realized by hardware. (Remote control configuration) Fig. 8 is a block diagram showing an example of the hardware configuration of the remote control 90 of Fig. 1. The remote control 90 includes a control unit 91, a storage unit 92, a communication unit 93, an input unit 94, an output unit 95, and a bus 99.

[0053] The control unit 91 is one or more processors. The control unit 91 is communicably connected to each component of the remote control 90 via a bus 99, and controls the operation of the entire remote control 90. The processor is a general-purpose processor such as a CPU or a GPU (Graphics Processing Unit), or a dedicated processor specialized for a specific process. The control unit 91 may include one or more dedicated circuits, or the one or more processors in the control unit 91 may be replaced with one or more dedicated circuits. The dedicated circuit is, for example, an FPGA.

[0054] The storage unit 92 is one or more semiconductor memories, one or more magnetic memories, one or more optical memories, or a combination of at least two of these. The semiconductor memories are, for example, RAM or ROM. The RAM is, for example, SRAM (Static RAM) or DRAM (Dynamic RAM). The ROM is, for example, EEPROM (Electrically Erasable Programmable ROM). The storage unit 92 functions, for example, as a main storage device, an auxiliary storage device, or a cache memory.

[0055] The communication unit 93 is a communication interface for communicating with the medicinal liquid administration device 1. The communication unit 93 communicates with the medicinal liquid administration device 1 to transmit information input by a user to the medicinal liquid administration device 1 and to receive information from the medicinal liquid administration device 1. The communication unit 93 communicates with the medicinal liquid administration device 1 by, for example, Bluetooth (registered trademark), but is not limited to this, and communication may also be performed by, for example, another wireless communication path such as a wireless LAN or a wired cable.

[0056] The input unit 94 includes one or more input interfaces that accept input operations by a user and acquire input information based on the user operations. The input unit 94 is, for example, a touch screen that is provided integrally with the display (display device) of the output unit 95, but is not limited thereto and may also be physical keys (for example, an external numeric keypad), capacitance keys, a pointing device, a microphone that accepts voice input, or the like.

[0057] The output unit 95 as a display unit includes one or more output interfaces that output information to the user and notify the user. For example, the output unit 95 is a display that outputs information by image display, an LED (Light Emitting Diode), a speaker, a vibrator, or the like, but is not limited to these.

[0058] The functions of the remote control 90 may be realized by executing a program according to this embodiment on a processor included in the control unit 91. That is, the functions of the remote control 90 may be realized by software. In this case, the program causes a computer to execute processing of steps included in the operation of the remote control 90, thereby causing the computer to realize functions corresponding to the processing of those steps. Alternatively, some or all of the functions of the remote control 90 may be realized by a dedicated circuit included in the control unit 91. That is, some or all of the functions of the remote control 90 may be realized by hardware.

[0059] (Operation of the drug administration device) When operating the medicinal solution administration device 1 according to this embodiment, the user first removes the cartridge 12 from the packaging container. In this state, the reservoir 18 of the cartridge 12 is not filled with medicinal solution, and the nut portion 24 is in a non-contact position where it does not contact the plunger 20 (see FIG. 5).

[0060] Next, the user uses a filling device, syringe, or the like to fill reservoir 18 with an appropriate amount of medicinal liquid from a medicinal liquid container, such as a vial in which the medicinal liquid is sealed. At this time, plunger 20 is moved to a position corresponding to the initial filling amount. Thereafter, the user attaches device main body 14 to cartridge 12. Thereafter, power from battery 42 of device main body 14 is supplied to each component, and output gear 48 of gear box 46 of device main body 14 meshes with spur gear 50 of cartridge 12. Control unit 71, memory unit 72, etc. are started up by receiving power from battery 42.

[0061] Next, the user primes the medicinal liquid administration device 1. Priming refers to the operation of filling the flow paths of the medicinal liquid administration device 1, including the outlet tube 29 and the cannula, with the medicinal liquid. Specifically, the user operates the remote control 90 to rotate the motor 44 in the forward direction. As a result, the rotational driving force of the motor 44 is transmitted to the feed screw shaft 22 via the gearbox 46, the spur gear 50, and the transmission shaft 52, causing the feed screw shaft 22 to rotate, and the nut portion 24 slides along the guide wall 68 and advances toward the plunger 20.

[0062] As the nut portion 24 advances toward the distal end of the plunger 20, the pair of claws 38 abut against the wall surfaces defining the through hole 64 of the nut portion 24, causing the pair of extensions 36 to bend toward each other. Then, when the claws 38 pass through the through hole 64, the claws 38 return to their original positions, thereby locking the nut portion 24 to the plunger 20. This allows the nut portion 24 to press the plunger 20 toward the distal end while holding it. Subsequently, by further advancing the nut portion 24, the medicinal liquid in the reservoir 18 is pressed against the plunger 20, filling the inner bore of the outlet tube 29, which serves as a flow path, with the medicinal liquid, thereby completing priming. In this embodiment, the user observes the distal end of the connecting needle tube connected to the outlet tube 29, and when the user confirms that the medicinal liquid has flowed out from the distal end of the connecting needle tube, the user instructs the medicinal liquid administration device 1 to stop priming. For example, the remote control 90 may display an image of a priming stop button on the display of the output unit 95, and notify the medicinal solution administration device 1 to stop the motor 44 in response to the user selecting the priming stop button.

[0063] Next, the user attaches the cradle device 11 to a predetermined position on the skin and uses the puncture mechanism to place the cannula of the connection port 106 inside the body, while engaging the connection port 106 with the cradle device 11. Next, by attaching the cartridge 12 and the device main body 14 to the cradle device 11, the outlet tube 29 and the cannula are connected, and the control unit 71 controls the rotation of the motor 44, thereby continuously or intermittently administering the medicinal liquid from the reservoir 18 into the body. The control unit 71 controls the rotation of the motor 44 according to a medicinal liquid administration schedule instructed by the remote control 90, and administers the medicinal liquid at various rates, such as a basal rate or a bolus, depending on the patient's condition. The basal rate is the amount of medicinal liquid per unit time that corresponds to the basal secretion of insulin. The bolus is the amount of medicinal liquid that corresponds to the additional secretion of insulin in response to a meal or an increase in blood glucose level.

[0064] The reservoir 18 of the cartridge 12 is filled with an amount of medicinal liquid to be administered in an administration cycle of a certain number of days. After the medicinal liquid filled in the reservoir 18 is administered into the living body over, for example, three days to one week, the cartridge 12 is replaced and discarded. The cartridge 12 is replaced with a new cartridge after each administration cycle. Each time the cartridge 12 is replaced, the reservoir 18 of the cartridge 12 is filled with medicinal liquid, the cartridge 12 is connected to the device main body 14, and a priming operation is performed. After these operations, while the medicinal liquid is being administered, the medicinal liquid administration device 1 can estimate the amount of medicinal liquid to be administered based on, for example, the number of rotations of the motor 44 performed during priming and liquid delivery. The medicinal liquid administration device 1 according to this embodiment includes a disposable cartridge 12 and a reusable device main body 14, thereby reducing running costs.

[0065] The amount of medicinal solution filled into reservoir 18 of cartridge 12 varies depending on the patient's age, condition, etc., even if the length of the administration cycle is the same. For example, if reservoir 18 is filled with a three-day amount of medicinal solution, cartridge 12 for adults will be filled with more medicinal solution than cartridge 12 for children.

[0066] When the amount of medicinal liquid filled in reservoir 18 is different, the power consumption required to complete the administration of the medicinal liquid will also differ, even if the administration cycle length is the same, as described below. In the priming operation, medicinal liquid administration device 1 moves nut portion 24 from the non-contact position (see FIG. 5 ) to a position (initial position) where it contacts plunger 20 corresponding to the initial filling amount. Furthermore, medicinal liquid administration device 1 pushes nut portion 24 until the medicinal liquid in reservoir 18 is pressed against plunger 20, filling the inside of outlet tube 29 and connecting needle tube with medicinal liquid (priming completion position). From the standpoint of convenience, nut portion 24 may be moved at a speed faster during the priming operation than during medicinal liquid administration into a living body. That is, the rotational speed of motor 44 during priming may be higher than the rotational speed of the motor during medicinal liquid administration. Therefore, when the amount of medicinal solution filled in the reservoir 18 is small, the distance moved by the nut portion 24 during the priming operation is longer, and the distance moved by the nut portion 24 during the administration operation in the administration cycle is shorter. When the amount of medicinal solution filled in the reservoir 18 is larger, the distance moved by the nut portion 24 during the priming operation is shorter, and the distance moved by the nut portion 24 during the administration operation in the administration cycle is longer. When the nut portion 24 is moved the same distance, the power consumption required to move the nut portion 24 during the priming operation is less than the power consumption required to move the nut portion 24 during the operation of administering the medicinal solution into the living body. This is because, during the priming operation, the flow path of the medicinal solution administration device 1 is not fluidly connected to the cannula placed in the living body, but during the administration operation, the flow path of the medicinal solution administration device 1 is fluidly connected to the cannula placed in the living body, and the medicinal solution must be administered against the biological tissue at the tip of the cannula, so the load on the motor 44 is higher than during the priming operation. Therefore, more power is required during the injection operation than during the priming operation to rotate the motor 44 by the same rotation angle. For example, if the motor 44 is configured as a stepping motor, the pulse width of the pulse applied to the motor 44 needs to be wider than that during the priming operation.The pulse width of the pulses applied to the motor 44 during the priming operation and the administration operation can be set in advance based on the expected load and rotation speed on the motor 44 so as not to cause loss of synchronization and to achieve low power consumption.Based on this, the control unit 71 can change the pulse width of the pulses applied to the motor 44 during the priming operation and the administration operation.

[0067] Thus, even if the replacement cycle and expiration date of cartridge 12 are the same, the amount of power consumed until the administration of the medicinal liquid filled in cartridge 12 is completed varies depending on the initial amount of medicinal liquid filled in reservoir 18. Therefore, without taking into consideration the initial amount of medicinal liquid in cartridge 12 (i.e., the filled amount), it is not possible to accurately calculate how many times cartridge 12 can be replaced based on the power remaining in battery 42 of device main body 14.

[0068] The medicinal solution administration device 1 according to this embodiment calculates the number of times the cartridge 12 can be replaced based on the priming power amount, the liquid delivery power amount, and the amount of power remaining in the battery 42. Here, the priming power amount is the amount of power required to move the nut portion 24 until the flow path of the medicinal solution administration device 1 is filled with the medicinal solution (i.e., priming). The liquid delivery power amount is the amount of power used from the start of medicinal solution administration to the end of administration after priming has made the medicinal solution administration ready to start. In other words, the liquid delivery power amount is the amount of power required to administer the medicinal solution filled in the reservoir 18 to the patient. The priming power amount and the liquid delivery power amount are values ​​corresponding to the amount of medicinal solution filled. Therefore, the medicinal solution administration device 1 according to this embodiment can accurately measure the number of times the cartridge 12 can be replaced.

[0069] Fig. 9 is a flowchart showing the operation procedure of the medicinal liquid administration device 1 of Fig. 1. Fig. 10 is a flowchart showing the procedure of the rotation speed measurement process of Fig. 9. The operation of the medicinal liquid administration device 1 described with reference to Figs. 9 and 10 may correspond to one of the control methods of the medicinal liquid administration device 1. The operation of each step in Figs. 9 and 10 may be performed under the control of the control unit 71 of the medicinal liquid administration device 1 or the control unit 91 of the remote control 90. The following process may be performed, for example, after the cartridge 12 has been replaced, in response to a command for a priming operation being given via the remote control 90 when the device body 14 of the medicinal liquid administration device 1 and the cartridge 12 are connected.

[0070] In step S1, the control unit 71 of the medical solution administration device 1 measures the remaining power level of the battery 42. Specifically, for example, the control unit 71 may measure the remaining power level of the battery 42 by measuring the voltage or impedance of the battery 42.

[0071] In step S2, the control unit 71 of the medicinal solution administration device 1 estimates the amount of power required for one cycle from historical information regarding past medicinal solution administrations. Specifically, when performing a priming operation and medicinal solution administration, the control unit 71 stores information on the power consumption required for these operations in the storage unit 72 in advance. The control unit 71 may measure the power consumption based on the difference in the remaining power of the battery 42 measured before and after the operation. The storage unit 72 stores the power consumption required for the priming operation and medicinal solution administration measured in this manner, along with date and time information. In step S2, the control unit 71 estimates the amount of power required for one administration cycle by referring to this information. For example, the control unit 71 may estimate the amount of power required for one administration cycle to be the same as the power consumption required for the priming operation and medicinal solution administration in the immediately preceding administration cycle. Alternatively, the control unit 71 may estimate the amount of power required for one administration cycle to be the average value of the power consumption required for the priming operation and medicinal solution administration over a certain number of recent administration cycles. If this is the first time that the medicinal liquid administration device 1 is being operated and history information regarding past medicinal liquid administrations is not stored in the storage unit 72, the amount of power required for administering the amount of medicinal liquid previously input by the patient may be estimated as the amount of power required for one administration cycle. Alternatively, the amount of power required for administering the maximum amount that can be filled into the reservoir 18 may be set as a default value, which is the maximum amount of power required for one administration cycle.

[0072] In step S3, the control unit 71 of the medicinal solution administration device 1 determines whether the current remaining battery charge acquired in step S1 exceeds the amount of power required for one administration cycle estimated in step S2. If the remaining battery charge exceeds the amount of power required for one administration cycle (YES in step S3), the control unit 71 proceeds to step S4; if not (NO in step S3), the control unit 71 proceeds to step S9. In step S3, the control unit 71 may also proceed to step S4 if the current remaining battery charge acquired in step S1 and the amount of power required for one administration cycle estimated in step S2 are the same. Furthermore, if the value of the current remaining battery charge acquired in step S1 is less than a predetermined value (for example, 10% of the maximum amount of power that the battery 42 can charge), the control unit 71 may proceed to step S9 regardless of the amount of power required for one administration cycle.

[0073] In step S4, the control unit 71 of the medicinal liquid administration device 1 executes a rotation speed measurement process to measure the rotation speed of the motor 44 in order to measure the position of the nut portion 24 corresponding to the amount of medicinal liquid filled. The following process is premised on the assumption that the nut portion 24 is in a non-contact position where it does not come into contact with the plunger 20.

[0074] In step S11 of Fig. 10, the control unit 71 of the medicinal solution administration device 1 starts reverse rotation of the motor 44. This causes the nut portion 24 to move in a direction away from the plunger 20. At this time, the nut portion 24 rotates in reverse to a predetermined position. The predetermined position is, for example, a position where the retraction of the slide portion 60 is restricted by a stopper provided on the guide wall 68, or the position of the rearmost end of the feed screw shaft 22. When the nut portion 24 reaches the predetermined position and the motor 44 continues to rotate in reverse, the motor 44 loses synchronization.

[0075] In step S12, the control unit 71 of the medicinal solution administration device 1 determines whether the motor 44 has stepped out. If the motor 44 has stepped out (YES in step S12), the control unit 71 proceeds to step S13; if not (NO in step S12), the control unit 71 continues the reverse rotation of the motor 44 and performs the process of step S12 again. If the motor 44 has stepped out, the nut portion 24 is in a predetermined position. Here, the nut portion 24 is aligned by moving the nut portion 24 to the predetermined position. This makes it possible to maintain the accuracy of estimating the number of times the cartridge 12 has been replaced, as described below, even if the nut portion 24 unintentionally moves while the cartridge 12 is being prepared.

[0076] In step S13, the control unit 71 of the medicinal liquid administration device 1 stores in the storage unit 72 the number of reverse rotations of the motor 44 from when the reverse rotation starts in step S11 until when the motor 44 loses synchronization.

[0077] In step S14, the control unit 71 of the medicinal solution administration device 1 starts the forward rotation of the motor 44. This causes the nut portion 24 to move in a direction approaching the plunger 20, and eventually the nut portion 24 and the plunger 20 engage with each other. The nut portion 24 then pushes the plunger 20, applying pressure to the medicinal solution in the reservoir 18 and performing priming, which fills the flow path of the medicinal solution administration device 1 with the medicinal solution. A user, such as a patient, observes the tip of the connecting needle tube and, upon confirming that the medicinal solution has flowed out from the tip of the connecting needle tube, instructs the medicinal solution administration device 1 to stop priming. For example, the user may instruct the medicinal solution administration device 1 to stop priming by selecting an image of a priming stop button displayed on the display of the output unit 95 of the remote control 90.

[0078] In step S15, the control unit 71 of the medicinal liquid administration device 1 determines whether or not the user has selected the priming stop button. If the priming stop button has been selected (YES in step S15), the control unit 71 proceeds to step S16, and if not (NO in step S15), the control unit 71 continues the forward rotation of the motor 44 and performs the process of step S15 again.

[0079] In step S16, the control unit 71 of the medical solution administration device 1 stops the rotation of the motor 44.

[0080] In step S17, the control unit 71 of the medicinal solution administration device 1 stores the number of forward rotations of the motor 44 from when the forward rotation starts in step S14 until when the rotation stops in the storage unit 72. Then, the control unit 71 ends the rotation number measurement process and proceeds to step S5 in FIG.

[0081] In step S5 of Fig. 9, the control unit 71 of the drug solution administration device 1 estimates the amount of power required for the priming operation (priming power amount) based on the rotation speed of the motor 44 measured in the rotation speed measurement process of step S4. For example, the control unit 71 may estimate the amount of power required for the priming operation by acquiring the amount of power consumed per one rotation of the motor 44 stored in advance in the storage unit 72 and multiplying that value by the rotation speed of the motor 44. Here, the rotation speed of the motor 44 is the sum of the reverse rotation speed stored in step S13 of Fig. 10 and the forward rotation speed stored in step S17.

[0082] In step S6, the control unit 71 of the medicinal liquid administration device 1 estimates the amount of power (amount of liquid delivery power) required to administer the medicinal liquid based on the amount of the medicinal liquid filled in the reservoir 18. Specifically, the control unit 71 may acquire the number of forward rotations saved in step S17 of FIG. 10, and acquire the amount of medicinal liquid filled corresponding to that number of forward rotations. The control unit 71 may also acquire the amount of liquid delivery power corresponding to that amount of medicinal liquid filled. For example, the control unit 71 may store in advance in the storage unit 72 a table indicating the correspondence between the number of forward rotations, the amount of medicinal liquid filled, and the amount of liquid delivery power, and may acquire the amount of liquid delivery power corresponding to the number of forward rotations by referring to the table.

[0083] In step S7, the control unit 71 of the medical solution administration device 1 measures the remaining power of the battery 42. Specifically, similar to step S1, the control unit 71 may measure the remaining power of the battery 42 by measuring the voltage or impedance of the battery 42.

[0084] In step S8, the control unit 71 of the drug solution administration device 1 calculates the number of times the cartridge 12 (disposable portion) can be replaced based on the priming power amount estimated in step S5, the liquid delivery power amount estimated in step S6, and the remaining battery level acquired in step S7. Specifically, the control unit 71 may calculate the number of times the cartridge 12 (disposable portion) can be replaced by dividing the remaining battery level acquired in step S7 by the sum of the priming power amount and the liquid delivery power amount. The control unit 71 may calculate the number of times the cartridge 12 can be replaced by rounding down the value calculated by the division to one decimal place. The control unit 71 may display the calculated number of times the cartridge 12 can be replaced on the display of the output unit 95 of the remote control 90. Specifically, the control unit 71 may notify the remote control 90 of the number of times the cartridge 12 can be replaced via the communication unit 73. In response to the notification of the number of times the cartridge 12 can be replaced, the control unit 91 of the remote control 90 may display the value on the display of the output unit 95. After completing the processing of step S8, the control unit 71 ends the processing of the flowchart.

[0085] In step S9, the control unit 71 of the medicinal liquid administration device 1 notifies the user of the power shortage. Specifically, for example, the power shortage may be notified to the remote control 90 via the communication unit 73. The control unit 91 of the remote control 90 may display an image indicating a power shortage on the display of the output unit 95 in response to the notification from the medicinal solution administration device 1. Furthermore, the control unit 91 may notify the user of the power shortage by audio output, vibration, or the like in addition to or instead of the image display from the output unit 95.

[0086] As described above, the drug solution administration device 1 administers the drug solution filled in the reservoir 18 into a living body by the pressing action of the plunger 20. The drug solution administration device 1 includes the reservoir 18, the plunger 20, the nut portion 24, the drive unit 40, the battery 42, and the control unit 71. The reservoir 18 is provided in a disposable cartridge 12 that is detachably connected, and is filled with the drug solution. The plunger 20 is provided in the reservoir 18 and is movable in the longitudinal direction of the reservoir 18. The nut portion 24 can press the plunger 20 toward the tip side of the reservoir 18 by moving within its movable range. The drive unit 40 moves the nut portion 24 within its movable range. The battery 42 supplies power for driving the drive unit 40. The control unit 71 calculates the number of times the cartridge 12 can be replaced, based on the priming power amount, the liquid delivery power amount, and the power amount remaining in the battery 42. The priming power amount is the amount of power required to move the nut portion 24 until the flow path of the medicinal liquid administration device 1 is filled with the medicinal liquid. The liquid delivery power amount is the amount of power required to administer the medicinal liquid filled in the reservoir 18. The control unit 71 presents the calculated number of possible replacements to the user.

[0087] In this way, the drug solution administration device 1 according to the present embodiment calculates the number of times the cartridge 12 can be replaced based on the amount of priming power, the amount of power used for delivering the liquid, and the amount of power remaining in the battery 42, and therefore can accurately measure the number of times the cartridge 12 can be replaced. In the example shown in FIGS. 4 to 6, the reservoir 18, plunger 20, and nut unit 24 are provided in the cartridge 12, and the drive unit 40, control unit 71, and battery 42 are provided in the device body 14, but this configuration is not limiting. For example, the nut unit 24 may be provided in the device body 14, and at least one of the drive unit 40 and control unit 71 may be provided in the cartridge 12.

[0088] Furthermore, the drive unit 40 may move the nut portion 24 by transmitting a drive force based on the rotation of the motor 44. The control unit 71 may estimate the amount of priming power and the amount of liquid delivery power based on the number of rotations of the motor 44 that is rotated to move the nut portion 24 until the flow path of the chemical solution administration device 1 is filled with the chemical solution. In this way, the chemical solution administration device 1 according to the present embodiment estimates the amount of priming power and the amount of liquid delivery power based on the number of rotations of the motor 44 to calculate the number of times the cartridge 12 can be replaced, and therefore, it is possible to accurately measure the number of times the cartridge 12 can be replaced.

[0089] Furthermore, the control unit 71 may calculate the number of times the battery can be replaced by dividing the amount of power remaining in the battery 42 by the total value of the amount of priming power and the amount of power used for delivering the liquid. In this way, the drug solution administration device 1 according to the present embodiment calculates the number of times the battery can be replaced by a simple calculation, and therefore the number of times the battery can be replaced can be easily determined.

[0090] Furthermore, the control unit 71 may display the calculated number of times the cartridge 12 can be replaced on a display device. This allows the user to easily recognize the number of times the cartridge 12 can be replaced. In the example of this embodiment, the medicinal liquid administration device 1 displays the remaining amount on the display of the output unit 95 of the remote control 90, but if the medicinal liquid administration device 1 itself is equipped with a display device, the display may also be displayed on that display device. Furthermore, the medicinal liquid administration device 1 may notify and display the remaining amount of the medicinal liquid on another device, such as a smartphone, a smartwatch, or a tablet.

[0091] As described above, the medicinal solution administration device 1 according to this embodiment can accurately grasp the remaining battery power of the device main body 14, which is the reusable part, as the number of times the cartridge 12 can be replaced. This allows the user to take measures such as charging the device main body 14 in advance or replacing the battery 42 with a new one before the battery 42 runs out. Furthermore, the remaining battery power of the device main body 14 can be used efficiently.

[0092] The present disclosure is not limited to the above-described embodiments. For example, multiple blocks shown in the block diagrams may be integrated, or one block may be divided. Multiple steps shown in the flowcharts may be executed in parallel or in a different order depending on the processing capabilities of the device executing each step, or as needed, instead of being executed in chronological order as described. Other modifications are possible without departing from the spirit of the present disclosure. [Explanation of symbols]

[0093] 1. Chemical solution administration device 10 Pump body 11 Cradle device 12 cartridges 14 Device body 16 Base 18 Reservoir 20 Plunger 22 Feed screw shaft 24 Nut part 26 Introduction Port 28 Derivation port 29 Outlet pipe 30 Plunger body 32 Pusher 34 Sealing material 36 Extension 38 Claw 39 Bearings 40 Drive unit 42 Batteries 44 Motor 46 Gearbox 48 Output gear 50 Spur gear 52 Transmission shaft 54 terminals 56 Bearings 58 Nut body 60 Slide section 62 screw holes 64 through holes 66 Reinforcement cover 68 Guide Wall 70 Lid 71 Control Unit 72 Memory section 73 Communications Department 74 Position detection unit (contact sensor) 75 Attitude detection unit 79 Bus 106 connection ports 111 Cabinet 121 Top part 123 Front 124 Back part 126 Side part 137 Guide groove 138 Engagement hook part 141 Placement surface section 143 Side wall 144 Side wall 151 Guide rail 152 Detection rail 153 Sliding Rail 154 Fitting hole 155 Mounting part 156 Posture Correction Department 158 Notch 162 Engagement receiving portion 181 Port body 182 Cap 90 Remote Control 91 Control Unit 92 Memory section 93 Communications Department 94 Input section 95 Output section 99 Bus 100 Chemical liquid administration system

Claims

1. A drug solution administration device that administers a drug solution filled in a reservoir into a living body by pressing a plunger, the reservoir, which is provided in a disposable cartridge that is detachably connected, and which is filled with the drug solution; a flow path connected to the reservoir and configured to lead the drug solution out of the reservoir; the plunger movable in the longitudinal direction of the reservoir; a movable portion that can press the plunger toward the distal end of the reservoir by moving within a movable region; a drive unit that moves the movable unit within the movable region; a battery that supplies power to drive the drive unit; A control unit; Equipped with The control unit calculating a number of times the cartridge can be replaced based on a priming power amount, which is the amount of power required to move the movable part until the flow path is filled with the medicinal solution, a liquid delivery power amount, which is the amount of power required to administer the medicinal solution filled in the reservoir, and the amount of power remaining in the battery; presenting the calculated number of possible exchanges to the user; Drug administration device.

2. the drive unit moves the movable unit by transmitting a drive force based on rotation of a motor; The control unit estimates the priming power amount and the liquid delivery power amount based on the number of rotations of the motor rotated to move the movable part until the flow path of the drug solution administration device is filled with the drug solution. The drug solution administration device according to claim 1 .

3. The drug solution administration device according to claim 1 , wherein the control unit calculates the number of times the battery can be replaced by dividing the amount of power remaining in the battery by the sum of the amount of power used for priming and the amount of power used for liquid delivery.

4. The drug solution administration device according to claim 1 , wherein the control unit causes a display device to display the calculated number of possible replacements.

5. The drug solution administration device according to any one of claims 1 to 4, a remote controller for a user to operate the drug solution administration device; A drug solution administration system comprising:

6. a reservoir filled with a drug solution, the reservoir being provided in a disposable cartridge that is detachably connected; a flow path connected to the reservoir and configured to lead the drug solution out of the reservoir; a plunger movable in the longitudinal direction of the reservoir; a movable portion that can press the plunger toward the distal end of the reservoir by moving within a movable region; a drive unit that moves the movable unit within the movable region; a battery that supplies power to drive the drive unit; A control unit; Equipped with A control method for a drug solution administration device that administers the drug solution filled in the reservoir into a living body by a pressing action of the plunger, comprising: The control unit calculating the number of times the cartridge can be replaced based on a priming power amount, which is the amount of power required to move the movable part until the flow path is filled with the medicinal solution, a liquid delivery power amount, which is the amount of power required to administer the medicinal solution filled in the reservoir, and the amount of power remaining in the battery; presenting the calculated number of times the exchange can be made to a user; A method for controlling a drug solution administration device, comprising:

Images