Administration instrument for medical use

• US 8,287,500 B2
• Filed: 10/14/2010
• Issued: 10/16/2012
• Est. Priority Date: 12/13/2001
• Status: Expired due to Term

• Current Assignee: PHC Holdings Corporation
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Baba, Tokumi, Ishikawa, Tokumi, Matsuda, Kouichi
• Primary Examiner(s): Lucchesi, Nicholas
• Assistant Examiner(s): MATNEY, BROOKE MARIE
• Application Number:
  US12/904,508
• Publication Number:
  US 20110028906A1
• Time in Patent Office: 733 Days
• Field of Search: 604/187, 604/137, 604/122, 604/123, 604/124, 604/125
• US Class Current: 604/187
• 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 for medical use that can perform injection of a drug solution with stability and with great reliability. For example, at administration, it is possible to prevent a force that presses the injection button from acting in a direction of inserting the needle that is inserted into the skin deeper, and enables the administration under a stable state where the needle does not wobble, thereby alleviating physical and mental pain of the administration patient. With a structure in which an injection button is pressed at an angle that is not parallel to the needle with respect to a direction in which the needle is inserted into the skin, it is possible to prevent the force of pressing the injection button from being transmitted in a direction of inserting the needle into the skin deeper than the initial insertion of the needle, thereby achieving an administration under a stable state.

Claims

1. An administration instrument for medical use, comprising:

a needle contact detection unit configured to detect that a needle is touching skin;

an injection completion detection unit configured to detect that injection has been completed;

an injection amount detection unit configured to detect an amount of the injection administered;

an injection amount recording unit configured to record the amount of the injection administered; and

a control unit configured to control the injection amount detection unit and the injection amount recording unit to record the amount of the injection administered only when the injection completion detection unit detects that the injection has been completed and the needle contact detection unit detects that the needle is touching the skin, after an air removal operation has occurred in a state in which the needle contact detection unit does not detect that the needle is touching the skin and the injection amount recording unit does not record the amount of the injection administered.

2. The administration instrument for medical use of claim 1 further comprising:

a calendar unit configured to generate a present date information; and

a clock unit configured to generate a present time information; and

wherein the control unit is configured to detect that the injection has been completed and, at the same time, record the date and the time of the completion of the injection.

3. The administration instrument for medical use of claim 1 including:

a display unit configured to display an injection amount in setting an amount of the injection to be administered, and an injection amount that is recorded when the injection has been completed.

4. The administration instrument for medical use of claim 3 wherein

the display unit is configured to display the date and the time, in addition to the injection amount that is recorded at the completion of the injection.

5. The administration instrument for medical use of claim 1 wherein

the needle contact detection unit includes:

a ring-shaped or a semi-ring-shaped contact detection member configured to slide along the needle at an instant when the needle is inserted; and

a switch operated by the sliding of the contact detection member.

6. The administration instrument for medical use of claim 1 wherein

the needle contact detection unit includes:

a switch on the same side of a skin touch portion as the needle, and operated during the administration at an instant when the needle is inserted into the skin.