Automatic administration instrument for medical use

• US 9,731,074 B2
• Filed: 01/30/2014
• Issued: 08/15/2017
• Est. Priority Date: 07/02/2002
• Status: Expired due to Term

• Current Assignee: PHC Holdings Corporation
• Original Assignee: Panasonic Healthcare Holdings Co., Ltd.
• Inventors: Ishikawa, Tokumi, Baba, Tokumi
• Primary Examiner(s): Hayman, Imani
• Assistant Examiner(s): Shah, Nilay
• Application Number:
  US14/168,509
• Publication Number:
  US 20140148760A1
• Time in Patent Office: 1,293 Days
• CPC Class Codes: A61M 2005/2013 triggering of discharging means by contact of injector with patient body
• CPC Class Codes: A61M 2005/206 With automatic needle insertion
• CPC Class Codes: A61M 2005/208 Release is possible only when device is pushed against the skin, e.g. using a trigger which is blocked or inactive when the device is not pushed against the skin
• CPC Class Codes: A61M 2005/3152 including gearings to multiply or attenuate the piston displacing force
• CPC Class Codes: A61M 2005/5006 Having means for destroying the syringe barrel, e.g. by cutting or piercing
• CPC Class Codes: A61M 2205/50 with microprocessors or computers
• CPC Class Codes: A61M 2205/581 by audible feedback
• CPC Class Codes: A61M 5/20 Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically A61M5/142 , A61M5/46 take precedence; hypodermic projectiles F42B12/54
• CPC Class Codes: A61M 5/2066 comprising means for injection of two or more media, e.g. by mixing
• CPC Class Codes: A61M 5/2448 comprising means for injection of two or more media, e.g. by mixing
• CPC Class Codes: A61M 5/326 Fully automatic sleeve extension, i.e. in which triggering of the sleeve does not require a deliberate action by the user
• CPC Class Codes: A61M 5/422 Desensitising skin

Abstract

An automatic administration instrument includes a syringe and a partition wall in the syringe which partitions the syringe into different rooms for respectively holding plural kinds of drug solutions or a drug and a drug solution. A partition-wall driver displaces the partition wall and an injection needle is connected to the syringe. A body cap attached to the administration instrument body so as to cover the injection needle. The syringe, the partition wall, and the body cap are configured such that displacing the partition wall dissolves or mixes the drug solutions or the drug and the drug solution in a state that the injection needle is covered by the body cap.

Claims

1. An automatic administration instrument for medical use for injecting a drug solution filled in a syringe, said automatic administration instrument comprising:

a body for housing the syringe and an injection needle;

a first motor for sliding the syringe within said body in a direction toward a tip of the injection needle such that the tip of the injection needle protrudes from said body;

a second motor for moving the drug solution in the syringe to administer the drug solution; and

a first switch provided on said body, said first switch for starting an automatic needle insertion in which said first motor and said second motor are activated in sequential order while a part of an exterior of said body is being pressed against a body region of a patient to which the drug solution is to be administered;

a second switch provided on said body, said second switch for starting an automatic air releasing in which said first motor and said second motor are activated in sequential order; and

a microprocessor,

wherein said microprocessor is adapted to activate said first motor when said second switch is pressed with said injection needle turning upward, such that a tip of the injection needle protrudes from said body by sliding the syringe within said body in a direction toward a tip of the injection needle, and thereafter activates said second motor such that air releasing is carried out in a state in which the tip of the injection needle protrudes from said body by moving the drug solution in the syringe to administer the drug solution, and thereafter activates said first motor backward such that the tip of the injection needle is housed in said body, and

an rpm of said second motor in the air releasing, which depends on an amount of air to be pushed out from the tip of the injection needle in the air releasing, is previously incorporated in the microprocessor as a program, and

said microprocessor is adapted to activate said first motor when the first switch is pressed while the part of the exterior of said body is being pressed against the body region of the patient to which the drug solution is to be administered upon completing the air releasing, such that the tip of the injection needle protrudes from said body to perform needle insertion into the body region of the patient, and thereafter activates said second motor to administer the drug solution.

2. The automatic administration instrument as defined in claim 1, wherein the air releasing is not carried out when the injection needle is not attached to said body of said administration instrument.

3. The automatic administration instrument as defined in claim 1, wherein during when the air releasing is carried out, the body is positioned with the injection needle turning upward and the body is not pressed against the body region of the patient.

4. The automatic administration instrument as defined in claim 1, further comprising a body cap attached to said body so as to cover the injection needle, wherein said air releasing is carried out in a state in which the tip of the injection needle protrudes from said body cap.