Administration instrument for medical use

• US 10,463,800 B2
• Filed: 06/02/2017
• Issued: 11/05/2019
• Est. Priority Date: 12/13/2001
• Status: Active Grant

• Current Assignee: PHC Holdings Corporation
• Original Assignee: PHC Holdings Corporation
• Inventors: Baba, Tokumi, Ishikawa, Tokumi, Matsuda, Kouichi
• Primary Examiner(s): Mehta, Bhisma
• Assistant Examiner(s): Ponton, James D
• Application Number:
  US15/612,328
• Publication Number:
  US 20170266390A1
• Time in Patent Office: 886 Days
• CPC Class Codes: A61M 2005/2407 from the rear
• CPC Class Codes: A61M 2005/2488 via rotation, e.g. threads or bayonet
• CPC Class Codes: A61M 2005/2496 via pivot
• CPC Class Codes: A61M 2005/3123 having air entrapping or venting means, e.g. purging channels in pistons
• CPC Class Codes: A61M 2005/3125 specific display means, e.g. to indicate dose setting
• CPC Class Codes: A61M 2005/3132 having flow passages for injection agents at the distal end of the barrel to bypass a sealing stopper after its displacement to this end due to internal pressure increase
• CPC Class Codes: A61M 2005/3152 including gearings to multiply or attenuate the piston displacing force
• CPC Class Codes: A61M 2205/13 with means for the detection of operative contact with patient, e.g. lip sensor
• CPC Class Codes: A61M 2205/14 Detection of the presence or absence of a tube, a connector or a container in an apparatus
• CPC Class Codes: A61M 2205/50 with microprocessors or computers
• CPC Class Codes: A61M 2205/581 by audible feedback
• CPC Class Codes: A61M 2205/583 by visual feedback
• CPC Class Codes: A61M 5/24 Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic ampoules or carpules A61J1/06
• CPC Class Codes: A61M 5/2448 comprising means for injection of two or more media, e.g. by mixing
• CPC Class Codes: A61M 5/3129 Syringe barrels A61M5/3205 and A61M5/50 take precedence
• CPC Class Codes: A61M 5/3146 Priming, e.g. purging, reducing backlash or clearance
• CPC Class Codes: A61M 5/31511 Piston or piston-rod constructions, e.g. connection of piston with piston-rod A61M5/5066 takes precedence
• CPC Class Codes: A61M 5/31553 without axial movement of dose setting member
• CPC Class Codes: A61M 5/31556 Accuracy improving means
• CPC Class Codes: A61M 5/31561 using freely adjustable volume steps
• CPC Class Codes: A61M 5/31571 : Means preventing accidental administration for automatic syringes A61M5/20
• CPC Class Codes: A61M 5/31573 : Accuracy improving means
• CPC Class Codes: A61M 5/3158 : performed by axially moving actuator operated by user, e.g. an injection button
• CPC Class Codes: A61M 5/31583 : based on rotational translation, i.e. movement of piston rod is caused by relative rotation between the user activated actuator and the piston rod
• CPC Class Codes: A61M 5/31585 : performed by axially moving actuator, e.g. an injection button
• CPC Class Codes: A61M 5/31596 : comprising means for injection of two or more media, e.g. by mixing
• CPC Class Codes: A61M 5/3287 : Accessories for bringing the needle into the body; Automatic needle insertion A61M5/20, A61M5/31525 take precedence
• CPC Class Codes: A61M 5/46 : having means for controlling depth of insertion

Abstract

An administration instrument includes an injection button which can be pressed at an angle that is not parallel to a needle with respect to a direction in which the needle is inserted into skin. As a result, it is possible to prevent a force of pressing the injection button from being transmitted in the direction in which the needle is inserted into the skin deeper than initial insertion of the needle, thereby achieving an administration under a stable state.

Claims

1. An administration instrument for medical use comprising:

an administration instrument body,

a drug solution cartridge for separately storing a plurality of drug solutions, or a drug and a drug solution, the drug solution cartridge being detachably housed within the administration instrument body,

a sliding piece for holding the drug solution cartridge at an end of the sliding piece,

an eject lever having an end projecting from the sliding piece and being freely movable in a direction parallel to a needle attachment direction on the sliding piece, and

an injection button-integrated driving lever configured to be disengaged from an engagement portion of the eject lever that is opposite to the end of the eject lever so that the injection button-integrated driving lever cannot be freely moved when a needle is not attached to the drug solution cartridge,

wherein the administration instrument is configured so that, when the needle is attached to the drug solution cartridge, the eject lever is configured to be moved so that the engagement portion of the eject lever is engaged with the injection button-integrated driving lever by pushing the end of the eject lever in the needle attachment direction, and thereby the injection button-integrated driving lever is able to freely move and an injection button is able to be pressed.

2. The administration instrument according to claim 1, wherein the needle is covered by a cap so that the needle is not exposed.

3. The administration instrument according to claim 1, further comprising a retractable lid for covering the drug solution cartridge.

4. The administration instrument according to claim 1, wherein the administration instrument is configured so that,

when the end of the eject lever projects beyond the end of the sliding piece toward the needle, an eject knob passes through a slit on the sliding piece and a slit on the eject lever so that the drug solution cartridge cannot be moved, thereby the drug solution cartridge cannot be housed within the administration instrument body, and

when the needle is attached to the drug solution cartridge, the slit on the eject lever can be moved so that the eject knob is pushed down, thereby the drug solution cartridge can be housed within the administration instrument body.