Medical automatic medicator

• US 20050209569A1
• Filed: 07/02/2003
• Published: 09/22/2005
• Est. Priority Date: 07/02/2002
• Status: Active Grant

• Current Assignee: PHC Holdings Corporation
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Ishikawa, Tokumi, Baba, Tokumi
• Granted Patent: US 8,298,171 B2
• Time in Patent Office: Days
• US Class Current: 604/207
• 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

After pressing a part of the exterior of a body of an administration instrument against a body region of a patient to which a drug solution is to be administered, an injection needle that is housed in the instrument body is automatically protruded from the body to insert the needle into the body region, and further, the injection needle being inserted into the body region is automatically housed in the instrument body to remove the needle from the body region. Thereby, the pain of the patient during needle insertion and needle removal is reduced, and administration at a constant speed is possible during injection of the drug solution. Furthermore, even when two kinds of drug solutions or a dissolving and mixing type drug solution are/is used, mixing can be easily and reliably carried out.

Claims

1. An automatic administration instrument for medical use for injecting a drug solution filled in a syringe, wherein a switching means provided on the body of the administration instrument is operated by pressing a part of the exterior of the body against a body region of a patient to which the drug solution is to be administered, thereby operating a first driving means so that an injection needle housed in the body protrudes from the body to perform needle insertion into the body region, and thereafter, a second driving means for driving the syringe is operated to administer the drug solution.

2. An automatic administration instrument for medical use as defined in claim 1 wherein, after a detection means detects that administration of the drug solution is completed and/or that the administration instrument body is removed from the body region, the driving means is operated so that the injection needle that protrudes from the body to be inserted in the body region is housed in the administration instrument body.

3. An automatic administration instrument for medical use as defined in claim 1 wherein a speed of inserting the injection needle or a speed of pulling out the injection needle is variable.

4. An automatic administration instrument for medical use as defined in claim 1 wherein a speed at which the drug solution is administered by the second driving means is variable.

16. An automatic administration instrument for medical use as defined in claim 2 wherein a speed of inserting the injection needle or a speed of pulling out the injection needle is variable.

17. An automatic administration instrument for medical use as defined in claim 2 wherein a speed at which the drug solution is administered by the second driving means is variable.

5. An automatic administration instrument for medical use for injecting a drug solution, said administration instrument being provided with an inner case that is slidably provided in an outer case of the body, an injection needle that is attached to the inner case, a syringe that is replaceably attached to the inner case and is filled with a drug solution, a first driving means for sliding the inner case in the outer case, a second driving means that is coupled to the syringe to administer the drug solution filled in the syringe, and a switch means for driving the first and second driving means;

wherein, when performing insertion of the injection needle, the first driving means is operated by the switch means to slide the inner case so that the injection needle protrudes from the outer case, thereby automatically inserting the needle into a body region of a patient to which the drug solution is to be administered.

6. An automatic administration instrument for medical use as defined in claim 5 wherein, when performing removal of the injection needle, the inner case is slid so that the injection needle protruding from the outer case is housed in the outer case, thereby automatically removing the injection needle.

7. An automatic administration instrument for medical use as defined in claim 5 further including a detection switch for detecting as to whether the administration instrument body contacts the body region to which the drug solution is to be administered.

8. An automatic administration instrument for medical use as defined in claim 7 wherein insertion of the injection needle is enabled when the detection switch detects that the administration instrument contacts the body region to which the drug solution is to be administered.

9. An automatic administration instrument for medical use as defined in claim 8 wherein administration of the drug solution is stopped when the detection switch detects that the administration instrument does not contact the body region to which the drug solution is to be administered, during administration of the drug solution.

10. An automatic administration instrument for medical use as defined in claim 8 wherein the operation of housing the injection needle into the body is carried out when the detection switch detects that the administration instrument does not contact the body region to which the drug solution is to be administered, during insertion of the injection needle.

11. An automatic administration instrument for medical use as defined in claim 7 wherein the detection switch also serves as a switch for driving the first and second driving means.

18. An automatic administration instrument for medical use as defined in claim 8 wherein the detection switch also serves as a switch for driving the first and second driving means.

19. An automatic administration instrument for medical use as defined in claim 9 wherein the detection switch also serves as a switch for driving the first and second driving means.

12. An automatic administration instrument for medical use in which plural kinds of drug solutions, or a drug and a drug solution, are housed in different rooms in a syringe, which rooms are separated by a partition wall, and they are mixed or dissolved in the administration instrument body to administer the resultant drug solution, said instrument including;

a driving means for displacing the partition wall, and a switch means for operating the driving means, wherein said mixing or dissolving is automatically carried out by displacing the partition wall by operating the switch means.

13. An automatic administration instrument for medical use as defined in claim 12 further including a driving means for shaking the syringe in the administration instrument body after mixing or dissolving the plural drug solutions, or the drug and the drug solution.

14. An automatic administration instrument for medical use as defined in claim 12 wherein the syringe driving means is driven so that air releasing is carried out in advance of administration of the drug solution.

20. An automatic administration instrument for medical use as defined in claim 13 wherein the syringe driving means is driven so that air releasing is carried out in advance of administration of the drug solution.

15. An automatic administration instrument for medical use wherein injection of a drug solution is not carried out when an injection needle is not attached to the body of the administration instrument.