WO2014050065A1 - 薬液投与装置 - Google Patents
薬液投与装置 Download PDFInfo
- Publication number
- WO2014050065A1 WO2014050065A1 PCT/JP2013/005609 JP2013005609W WO2014050065A1 WO 2014050065 A1 WO2014050065 A1 WO 2014050065A1 JP 2013005609 W JP2013005609 W JP 2013005609W WO 2014050065 A1 WO2014050065 A1 WO 2014050065A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- piston
- packing
- unit
- administration device
- flow path
- Prior art date
Links
- 239000012530 fluid Substances 0.000 title abstract 3
- 238000012856 packing Methods 0.000 claims abstract description 41
- 239000000126 substance Substances 0.000 claims description 58
- 229940079593 drug Drugs 0.000 claims description 26
- 239000003814 drug Substances 0.000 claims description 26
- 239000007788 liquid Substances 0.000 claims description 9
- 230000000994 depressogenic effect Effects 0.000 claims 1
- 244000208734 Pisonia aculeata Species 0.000 abstract 2
- 239000000243 solution Substances 0.000 description 68
- 238000010586 diagram Methods 0.000 description 9
- 230000008878 coupling Effects 0.000 description 7
- 238000010168 coupling process Methods 0.000 description 7
- 238000005859 coupling reaction Methods 0.000 description 7
- NOESYZHRGYRDHS-UHFFFAOYSA-N insulin Chemical compound N1C(=O)C(NC(=O)C(CCC(N)=O)NC(=O)C(CCC(O)=O)NC(=O)C(C(C)C)NC(=O)C(NC(=O)CN)C(C)CC)CSSCC(C(NC(CO)C(=O)NC(CC(C)C)C(=O)NC(CC=2C=CC(O)=CC=2)C(=O)NC(CCC(N)=O)C(=O)NC(CC(C)C)C(=O)NC(CCC(O)=O)C(=O)NC(CC(N)=O)C(=O)NC(CC=2C=CC(O)=CC=2)C(=O)NC(CSSCC(NC(=O)C(C(C)C)NC(=O)C(CC(C)C)NC(=O)C(CC=2C=CC(O)=CC=2)NC(=O)C(CC(C)C)NC(=O)C(C)NC(=O)C(CCC(O)=O)NC(=O)C(C(C)C)NC(=O)C(CC(C)C)NC(=O)C(CC=2NC=NC=2)NC(=O)C(CO)NC(=O)CNC2=O)C(=O)NCC(=O)NC(CCC(O)=O)C(=O)NC(CCCNC(N)=N)C(=O)NCC(=O)NC(CC=3C=CC=CC=3)C(=O)NC(CC=3C=CC=CC=3)C(=O)NC(CC=3C=CC(O)=CC=3)C(=O)NC(C(C)O)C(=O)N3C(CCC3)C(=O)NC(CCCCN)C(=O)NC(C)C(O)=O)C(=O)NC(CC(N)=O)C(O)=O)=O)NC(=O)C(C(C)CC)NC(=O)C(CO)NC(=O)C(C(C)O)NC(=O)C1CSSCC2NC(=O)C(CC(C)C)NC(=O)C(NC(=O)C(CCC(N)=O)NC(=O)C(CC(N)=O)NC(=O)C(NC(=O)C(N)CC=1C=CC=CC=1)C(C)C)CC1=CN=CN1 NOESYZHRGYRDHS-UHFFFAOYSA-N 0.000 description 6
- 230000007246 mechanism Effects 0.000 description 6
- 239000008155 medical solution Substances 0.000 description 6
- 239000000758 substrate Substances 0.000 description 4
- 102000004877 Insulin Human genes 0.000 description 3
- 108090001061 Insulin Proteins 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 229940125396 insulin Drugs 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000001647 drug administration Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000379 polypropylene carbonate Polymers 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 229920002725 thermoplastic elastomer Polymers 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/142—Pressure infusion, e.g. using pumps
- A61M5/14244—Pressure infusion, e.g. using pumps adapted to be carried by the patient, e.g. portable on the body
- A61M5/14248—Pressure infusion, e.g. using pumps adapted to be carried by the patient, e.g. portable on the body of the skin patch type
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/142—Pressure infusion, e.g. using pumps
- A61M5/14212—Pumping with an aspiration and an expulsion action
- A61M5/14216—Reciprocating piston type
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/142—Pressure infusion, e.g. using pumps
- A61M5/145—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons
- A61M5/1452—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/142—Pressure infusion, e.g. using pumps
- A61M5/145—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons
- A61M2005/14506—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons mechanically driven, e.g. spring or clockwork
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31511—Piston or piston-rod constructions, e.g. connection of piston with piston-rod
- A61M5/31513—Piston constructions to improve sealing or sliding
Definitions
- the present invention relates to a drug solution administration device, which is suitable for application when, for example, insulin is administered into the body.
- a chemical solution administration device it is also conceivable to send a chemical solution into the body by a so-called piston pump type delivery unit.
- a packing such as an O-ring or an X ring is provided on the outer periphery of a piston that slides in a cylinder, and the chemical solution leaks from between the cylinder and the piston. To prevent that.
- FIG. 1 shows the change of the starting resistance with time passage of plural kinds of packings.
- FIG. 2 shows an experiment showing changes in thrust (starting resistance) when a piston is started after a different standing time (0, 24, 72, 96 hours) using a 1.03 mm diameter piston and an X ring. It is a result.
- the present invention has been made in consideration of the above points, and intends to propose a drug solution administration device capable of reducing the size of the entire device.
- the present invention is a chemical solution administration device that is used by being attached to the skin of a living body, and a chemical solution storage unit that stores the chemical solution, and a flow path through which the chemical solution flows from the chemical solution storage unit into the living body
- a cylinder part that forms an internal space in which one end is connected to the flow path part and the piston is inserted and slides from the other end side, and the piston in the internal space of the cylinder part.
- the drive unit that slides between the most pressed position to the most retracted position, and the other end side of the piston when the piston in the internal space of the cylinder portion is in the retracted position.
- the contact resistance between the piston and the packing in the initial state can be made smaller than when the piston is in the retracted position. Therefore, the force for starting the piston in response to the starting resistance at the start of use can be made smaller than before.
- the contact resistance between the piston and the packing is made smaller than when the piston is in the retracted position. Therefore, the force for starting the piston upon receiving the starting resistance at the start of use can be made smaller than that of the prior art, and thus the size of the entire apparatus can be reduced.
- the drug solution administration device 1 is a portable device that is used by being attached to the skin of a user, and has a lower side with an open upper side and a space inside.
- a flat, substantially rectangular parallelepiped shape is formed by the housing 2 and the upper housing 3 that fits into the opening of the lower housing 2.
- the size of the drug solution administration device 1 may be reduced to such an extent that it can be affixed to the user's skin, and examples thereof include a substantially rectangular parallelepiped shape having a width of 32 mm, a length of 44 mm, and a height of 11 mm.
- the lower housing part 2 is provided with a sticking part 4 made of double-sided tape or the like on the bottom surface 2A.
- the medicinal-solution administration device 1 is held by the user when the affixing portion 4 is affixed to the user's skin.
- the medicinal solution administration device 1 includes a puncture mechanism 5, a medicinal solution storage unit 6, a flow channel unit 7, a delivery unit 8, a drive unit 9, a substrate unit 10, and the like in a space formed by the lower casing unit 2 and the upper casing unit 3. Is provided.
- the puncture mechanism 5 is a puncture needle (not shown) formed of a needle, a cannula or the like for puncturing the user's skin in order to administer the drug solution (for example, insulin) stored in the drug solution storage unit 6 into the user's body. 2) is projected from the puncture needle hole 2B provided on the bottom surface 2A of the lower housing part 2.
- the chemical solution storage unit 6 is composed of, for example, an outer cylinder and a piston, and the chemical solution is stored in a space formed by the outer cylinder and the piston. In the chemical solution storage unit 6, when the chemical solution is drawn out by the delivery unit 8, the piston moves in the outer cylinder by the force.
- the flow path part 7 includes the suction pipe 7A, the delivery pipe 7B, the flow paths 22B, 23A, 24A formed in the delivery part 8 and the puncture needle of the puncture mechanism 5, and the flow of the drug solution from the drug solution storage unit 6 to the body.
- the suction pipe 7A allows the chemical solution storage unit 6 and the flow path 23A formed in the delivery unit 8 to communicate with each other.
- the delivery tube 7B allows the flow path 24A formed in the delivery unit 8 to communicate with the puncture needle of the puncture mechanism 5.
- the delivery unit 8 causes the piston 21 to slide in the internal space 22A of the cylinder unit 22 (FIG. 5), so that the chemical solution stored in the chemical solution storage unit 6 is passed through the flow path unit 7. To be delivered to the body.
- the driving unit 9 drives the piston 21 based on the control of the CPU 51 (FIG. 9), and slides the piston 21 in the internal space 22 ⁇ / b> A of the cylinder unit 22.
- the substrate unit 10 is provided with a power source 54 (FIG. 9) for supplying power and a circuit such as a CPU 51.
- the delivery unit 8 includes a piston 21, a cylinder unit 22, lids 23 and 24, one-way valves 25 and 26, a packing 27, a packing fixing unit 28, and a fixing member 29. It is set as the structure containing.
- the piston 21 is in a position where it is most retracted when reciprocating (hereinafter also referred to as a retraction position).
- the piston 21 is most pushed in when reciprocating. At a position (hereinafter also referred to as a pressing position).
- the piston 21 is formed in a truncated cone shape in which the main body portion 21B other than the distal end portion 21A has a cylindrical shape with a diameter of 1.03 mm, for example, and the diameter decreases as the distal end portion 21A approaches the distal end.
- the piston 21 is driven by the drive unit 9 and slides with a predetermined stroke in a hollow internal space 22A formed in a cylindrical shape formed in the cylinder unit 22.
- Examples of the material of the piston 21 include stainless steel, copper alloy, aluminum alloy, titanium material, thermoplastic elastomer such as polypropylene and polycarbonate, and the like.
- the cylinder part 22 is provided with an internal space 22A in which the piston 21 is inserted from one end and slides.
- the cylinder portion 22 is provided such that a flow path 22B that is in contact with the other end of the internal space 22A and orthogonal to the internal space 22A penetrates between opposing side surfaces of the cylinder portion 22.
- the cylinder part 22 is provided with a packing 27 for preventing leakage of a chemical solution between the piston 21 and a packing fixing part 28 for fixing the packing 27 at one end where the piston 21 is inserted in the internal space 22A.
- a packing 27 for preventing the chemical liquid from leaking include an X-ring and an O-ring. In this embodiment, the X-ring is applied.
- the packing 27 is inserted into the cylinder part 22 from the surface side where the internal space 22A in the cylinder part 22 is provided, and is pressed and fixed by the packing fixing part 28.
- a part of the packing fixing part 28 is fitted in the cylinder part 22 and the packing 27 is fixed so that the remaining part is exposed to the outside.
- the cylinder portion 22 has lid portions 23 and 24 connected to the side surface on which the flow path 22B is formed via a fixing member 29, respectively.
- the lid portions 23 and 24 are provided with flow passages 23A and 24A penetrating along the flow passage 22B at positions facing the flow passage 22B of the cylinder portion 22.
- the lid part 23 has one end of the flow path 23A connected to the flow path 22B of the cylinder part 22, and the other end of the flow path 23A connected to the suction pipe 7A, thereby communicating the suction pipe 7A and the flow path 22B.
- the lid part 24 has one end of the flow path 24A connected to the flow path 22B of the cylinder part 22, and the other end of the flow path 24A connected to the delivery pipe 7B, thereby communicating the flow path 22B and the delivery pipe 7B.
- the delivery section 8 is provided with a one-way valve 25 between the flow path 23A of the lid section 23 and the flow path 22B of the cylinder section 22, and between the flow path 22B of the cylinder section 22 and the flow path 24A of the lid section 24. Is provided with a one-way valve 26.
- the one-way valve 25 allows the chemical liquid flowing from the flow path 23A of the lid portion 23 to the flow path 22B of the cylinder portion 22 to pass, and does not allow the chemical liquid to pass from the flow path 22B of the cylinder portion 22 to the flow path 23A of the lid portion 23.
- an umbrella valve is applied.
- the one-way valve 26 allows the chemical liquid flowing from the flow path 22B of the cylinder portion 22 to the flow path 24A of the lid portion 24 to pass, and does not allow the chemical liquid to pass from the flow path 22B of the cylinder portion 22 to the flow path 24A of the lid portion 24.
- an umbrella valve is applied.
- the delivery unit 8 moves the piston 21 from the push-off position to the retracted position by the drive unit 9 in the internal space 22 ⁇ / b> A when delivering the chemical solution from the chemical solution storage unit 6 into the living body, and stores the chemical solution stored in the chemical solution storage unit 6. Is sucked out into the internal space 22A.
- the delivery unit 8 delivers the drug solution sucked into the internal space 22A into the living body when the piston 21 is moved from the retracted position to the pushing position by the drive unit 9.
- the delivery unit 8 can administer about 1 to 2 ⁇ L of a chemical solution into the user's body by an operation of reciprocating the piston 21 once. By repeating this operation at a set cycle and interval, a desired administration rate and dosage can be obtained.
- the drug solution can be administered to the user.
- a part of the tip part 21A formed in the truncated cone shape is a position where the piston 21 is pulled from the retracted position. It arrange
- the collapse amount of the packing 27 can be reduced as compared with the case where it is in contact with the main body part 21B of the piston 21. . Thereby, in the delivery part 8, the contact resistance of the piston 21 and the packing 27 can be reduced.
- the drive unit 9 includes a base unit 31, a motor 32, a motor support unit 34, a motor fixing plate 35, a fixed plate support unit 36, a bearing unit 37, a coupling 38, and a bearing support unit 39. It is said.
- the drive unit 9 is arranged on the base unit 31.
- the motor 32 is sandwiched between a motor support portion 34 and a motor fixing plate 35 supported by the fixing plate support portion 36 and fixed to the base portion 31.
- the motor 32 is provided with a motor shaft 33 protruding from the side surface on the motor fixing plate 35 side.
- a screw groove 33 ⁇ / b> A is formed on the side surface of the motor shaft 33.
- the bearing portion 37 has a substantially rectangular parallelepiped shape that is elongated along the axial direction of the motor 32, and has a hollow interior.
- the bearing portion 37 is provided with a screw hole 37A at the center of the side surface corresponding to the short side of the substantially rectangular parallelepiped shape, through which the motor shaft 33 of the motor 32 is inserted and screwed into the screw groove 33A.
- the piston 21 is coaxially connected to the motor shaft 33 via a coupling 38 on a side surface facing a side surface provided with a screw hole 37 ⁇ / b> A corresponding to a short side of a substantially rectangular parallelepiped shape.
- the bearing portion 37 is supported by the bearing support portion 39.
- the coupling 38 for example, a coupling that absorbs axial displacement between the motor shaft 33 and the piston 21 is applied.
- the drive unit 9 rotates the motor shaft 33 when the motor 32 is driven, and the bearing unit 37 screwed to the motor shaft 33 in the axial direction is driven in accordance with the rotation.
- the drive unit 9 slides the piston 21 in the internal space 22 ⁇ / b> A of the cylinder unit 22. 7A and 7B, the piston 21 is in the retracted position, and in FIG. 8, the piston 21 is in the push-off position.
- the drive unit 9 since the motor shaft 33 of the motor 32 is arranged coaxially with the piston 21, the drive unit 9 has a force applied to the bearing portion 37 by the rotation of the motor shaft 33 and the force applied to the piston 21.
- the applied force is in the same direction, and the thrust loss of the piston 21 is eliminated.
- the drive unit 9 can slide the piston 21 within the internal space 22A of the cylinder unit 22 with a stable stroke distance.
- the driving unit 9 can drive the piston 21 with a smaller force by eliminating the loss of thrust of the piston 21, the motor 32, the battery, and the like can be reduced, and the entire apparatus can be downsized. Can do.
- the side surface of the piston 21 may be coated with diamond-like carbon to reduce sliding resistance.
- the space between the packing fixing part 28 and the coupling 38 is covered with a film 40 having a tube-like flexibility.
- a film 40 having a tube-like flexibility.
- the material of the film 40 for example, polyethylene or the like is applied.
- the film 40 is fixed to the packing fixing portion 28 and the coupling 38 without any gaps in the circumferential direction by film fixing portions 41 and 42 having both ends made of, for example, O-rings.
- the state in which the piston 21 is always covered can be maintained from the state in which the piston 21 is in the retracted position to the state in which the piston 21 is in the pressing position.
- the piston 21 can be slid in the internal space 22 ⁇ / b> A of the cylinder portion 22 without touching the air outside the film 40. Thereby, the chemical solution administration device 1 can further maintain the cleanliness of the piston 21 entering the internal space 22A.
- FIG. Processing Unit (51), ROM (Read Only Memory) 52, RAM (Random Access Memory) 53, power supply unit 54, interface unit (I / F unit) 55, notification unit 56 and drive unit 9 are connected via bus 57.
- ROM Read Only Memory
- RAM Random Access Memory
- I / F unit interface unit
- notification unit 56 and drive unit 9 are connected via bus 57.
- the CPU 51, ROM 52, RAM 53, power supply unit 54 and notification unit 56 are arranged on the substrate unit 10.
- a battery is applied to the power supply unit 54.
- the interface unit 55 is provided with a button (not shown) or the like that is arranged in the upper casing unit 3 or the lower casing unit 2 and receives a user input command.
- the notification unit 56 is a speaker.
- the CPU 51 performs overall control by reading the basic program stored in the ROM 52 into the RAM 53 and executing it, and executes various processes by reading out and executing the various application programs stored in the ROM 52.
- the chemical solution administration device 1 executes the chemical solution administration process according to the flowchart shown in FIG.
- the CPU 51 When the CPU 51 receives an activation signal from a controller (not shown) that gives various instructions to the drug solution administration device 1 in step SP1, the CPU 51 activates each unit, and drives the drive unit 9 in step SP2 to return the piston 21 from the initial position. Move to position.
- step SP3 the user injects the drug solution into the drug solution storage unit 6, and in step SP4, the drug solution administration device 1 is affixed to the user's skin via the affixing unit 4, and then the puncture mechanism 5 inserts the puncture needle into the user. Is punctured.
- step SP5 when the CPU 51 receives the administration parameters such as the dosage and the administration speed transmitted from the controller, the CPU 51 sets the parameters so as to drive the drive unit 9 according to the administration parameters.
- the CPU 51 drives the drive unit 9 in step SP6 to start administration of the chemical solution, and ends the administration of the chemical solution when it is determined in step SP7 that all the chemical solution has been administered.
- step SP7 determines whether or not the dose of the drug solution set in step SP8 has been administered, and if it has determined that it has not been administered, step SP9. Continue to administer the drug solution.
- the CPU 51 waits for an instruction input from the controller in step SP10 when it is determined that the medicinal solution set in step SP8 has been administered, and sequentially performs steps SP5 to SP10 when there is an instruction.
- a part of the tip portion 21 ⁇ / b> A formed in the truncated cone shape is a position where the piston 21 is pulled from the retracted position. It arrange
- the collapse amount of the packing 27 is reduced when the piston 21 is in the initial position, so that the contact resistance can be reduced more than when the packing 27 is in contact with the main body portion 21 ⁇ / b> B of the piston 21. it can.
- the chemical solution administration device 1 can reduce the contact resistance (starting resistance) between the piston 21 and the packing 27, even if the starting resistance of the piston 21 and the packing 27 increases with the passage of time, the value is set. Compared to the conventional case, it can be significantly reduced.
- the medicinal-solution administration device 1 does not require a large force to start the piston upon receiving a starting resistance at the start of use, and can reduce the size of the entire device.
- the piston 21 is formed in a truncated cone shape, the operation can be performed more reliably when moving from the initial position to the retracted position.
- the tip 21A of the piston 21 is formed in the shape of a truncated cone.
- the present invention is not limited to this, and the tip of the piston is circular like the main body. It may be formed in a columnar shape.
- the piston 121 has a tip 121A and a main body 121B on a columnar shape having the same diameter, and in an initial state, the piston 121 is at a position pulled from the retracted position and in the packing 27. It is in the initial position which contacts a part along a sliding direction. Thereby, in the initial state, the contact resistance (starting resistance) between the piston 121 and the packing 27 can be reduced.
- the present invention can be applied to the medical field, for example.
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- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
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Abstract
Description
図3及び図4に示すように、薬液投与装置1は、使用者の皮膚に貼り付けることにより保持されて使用される携帯型の装置であり、上側が開口し内部に空間が設けられた下筐体部2と該下筐体部2の開口に嵌合する上筐体部3により扁平な略直方体形状に形成される。
送出部8は、図5(A)及び(B)に示すように、ピストン21、シリンダ部22、蓋部23、24、一方向弁25、26、パッキン27、パッキン固定部28及び固定部材29を含む構成とされる。なお、図5(A)においてピストン21は往復動する際に最も引き戻される位置(以下、これを引戻位置とも呼ぶ)にあり、図5(B)においてピストン21は往復動する際に最も押し込まれる位置(以下、押切位置とも呼ぶ)にある。
駆動部9は、図7に示すように、土台部31、モータ32、モータ支持部34、モータ固定板35、固定板支持部36、軸受部37、カップリング38、軸受支持部39を含む構成とされる。
薬液投与装置1は、図9に示すように、CPU(Central
Processing Unit)51、ROM(Read Only Memory)52、RAM(Random Access Memory)53、電源部54、インターフェース部(I/F部)55、報知部56及び駆動部9がバス57を介して接続される。
以上の構成によれば、薬液投与装置1は、初期状態(出荷状態)において、ピストン21が引戻位置よりも引かれた位置で、かつ円錐台形状に形成された先端部21Aの一部が周方向に渡ってパッキン27と接触する位置(初期位置)に配され、薬液が薬液貯蔵部6に注入される前にピストン21を引き戻し位置させる。
上述した実施の形態においては、ピストン21の先端部21Aが円錐台形状に形成されているようにした場合について述べたが、本発明はこれに限らず、ピストンの先端が本体部と同様に円柱状に形成されていてもよい。
Claims (4)
- 生体の皮膚に貼着されて使用される薬液投与装置であって、
薬液が貯蔵される薬液貯蔵部と、
前記薬液貯蔵部から生体内へ薬液が流れる流路を形成する流路部と、
ピストンと、
一端が前記流路部と接続され、他端側から前記ピストンが挿入されて摺動する内部空間を形成するシリンダ部と、
前記ピストンを前記シリンダ部の内部空間内で、最も押し切られた押切位置から最も引き戻された引戻位置までの間で摺動させる駆動部と、
前記シリンダ部の内部空間における前記ピストンが引戻位置にあるときに該ピストンの先端より他端側に配され、前記ピストンと周方向にわたって接し、前記ピストンと前記シリンダ部との間から外部に薬液が漏れることを防止するパッキンとを有し、
前記ピストンは、初期状態において、前記引戻位置よりもさらに引かれた位置であって、かつ前記ピストンと前記パッキンとの間の接触抵抗が前記ピストンが前記引戻位置にあるときより小さくなる初期位置に配される
薬液投与装置。 - 前記薬液貯蔵部に薬液が外部から注入される前に、前記ピストンを前記初期位置から前記引戻位置に移動させるよう前記駆動部を制御する制御部をさらに有する
請求項1に記載の薬液投与装置。 - 前記ピストンは、
先端部がテーパ状に形成され、初期状態において、該テーパ状に形成された先端部が前記パッキンと接する
請求項1に記載の薬液投与装置。 - 前記ピストンは、
円柱形状に形成され、初期状態において、先端部が前記パッキンの一部と接する
請求項1に記載の薬液投与装置。
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| CN201380047786.6A CN104640585B (zh) | 2012-09-26 | 2013-09-24 | 药液给予装置 |
| JP2014538167A JP5986637B2 (ja) | 2012-09-26 | 2013-09-24 | 薬液投与装置 |
| EP13842945.1A EP2902052B1 (en) | 2012-09-26 | 2013-09-24 | Medical fluid administration device |
| US14/667,469 US9943642B2 (en) | 2012-09-26 | 2015-03-24 | Medical solution administration device |
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| EP (1) | EP2902052B1 (ja) |
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| CN105771037A (zh) * | 2015-12-31 | 2016-07-20 | 深圳麦科田生物医疗技术有限公司 | 一种注射泵 |
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| CN109475467A (zh) * | 2016-09-26 | 2019-03-15 | 泰尔茂株式会社 | 药液填充装置以及药液填充方法 |
| ES2985905T3 (es) * | 2016-11-22 | 2024-11-07 | Lts Device Tech Ltd | Aparato para suministrar una sustancia terapéutica |
| JP6990234B2 (ja) | 2017-03-30 | 2022-01-12 | テルモ株式会社 | 薬液投与装置及びその動作方法 |
| DE102017111299A1 (de) * | 2017-05-23 | 2018-11-29 | B. Braun Melsungen Ag | Infusionspumpe mit einem verschiedene Betriebszustände einnehmbaren Pumpmodul |
| US11357909B2 (en) | 2018-10-05 | 2022-06-14 | Eitan Medical Ltd. | Triggering sequence |
| WO2020178824A1 (en) | 2019-03-05 | 2020-09-10 | Avoset Health Ltd. | Infusion pump with valve compensation |
| US12318576B2 (en) | 2019-03-05 | 2025-06-03 | Eitan Medical Ltd. | Infusion pump with toggling capability |
| TW202527982A (zh) | 2023-09-11 | 2025-07-16 | 美商默門塔醫藥公司 | Fcrn抗體之醫藥組成物 |
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| Publication number | Publication date |
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| JPWO2014050065A1 (ja) | 2016-08-22 |
| US20150258274A1 (en) | 2015-09-17 |
| EP2902052A1 (en) | 2015-08-05 |
| JP5986637B2 (ja) | 2016-09-06 |
| US9943642B2 (en) | 2018-04-17 |
| EP2902052A4 (en) | 2016-05-18 |
| EP2902052B1 (en) | 2017-08-16 |
| CN104640585B (zh) | 2017-05-03 |
| CN104640585A (zh) | 2015-05-20 |
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