Portable painkilling system

• US 6,530,901 B1
• Filed: 03/29/2001
• Issued: 03/11/2003
• Est. Priority Date: 07/29/1999
• Status: Expired due to Term

• Current Assignee: Tsukada Medical Research Co., Ltd.
• Original Assignee: Tsukada Medical Research Co., Ltd.
• Inventors: Nakajima, Yasuhiko, Tsukada, Osamu
• Primary Examiner(s): Yuen, Henry C.
• Assistant Examiner(s): FRISTOE JR, JOHN K
• Application Number:
  US09/806,347
• Time in Patent Office: 712 Days
• Field of Search: 604/6.11, 604/9, 604/30, 604/118, 604/131, 604/132, 604/151, 604/153, 604/183, 604/187, 604/288.03, 604/288.04, 604/890.1
• US Class Current: 604/132
• CPC Class Codes: A61M 2005/1405 Patient controlled analgesia [PCA]
• CPC Class Codes: A61M 5/141 with capillaries for restricting fluid flow
• CPC Class Codes: A61M 5/152 pressurised by contraction of elastic reservoirs containers for dispensing contents by contraction of an elastic bag provided therein, in general B65D83/0061
• CPC Class Codes: A61M 5/16877 Adjusting flow; Devices for setting a flow rate

Abstract

A portable painkilling system comprises: a first continuous injector (1) for liquid medicine which continuously discharges liquid medicine through a control path (131) in an outlet portion (13) for a given period of time; a flexible, elastic reservoir (3) connected to the outlet portion (13) of the first continuous injector (1) for liquid medicine at one end thereof, the reservoir (3) being adapted to constrict in a normal condition and to expand when liquid medicine from the first continuous injector (1) is being charged into the reservoir (3) so as to contain a maximum quantity of liquid medicine; and a second continuous injector (2) for liquid medicine having an inlet portion (22) connected to the other end (32) of the reservoir (3), the second continuous injector (2) being adapted to receive liquid medicine from the reservoir (3) and to continuously discharge liquid medicine stored in the second continuous injector (2) through a control path (231) in an outlet portion (23) for a given period of time.

Claims

1. A portable painkilling system comprising:

a first continuous injector for liquid medicine which continuously discharges liquid medicine through a control path in an outlet portion for a given period of time wherein said first continuous injector has a first cylindrical body and a first balloon disposed therein, attached to the periphery of said cylindrical body;

a flexible, elastic reservoir connected to said outlet portion of said first continuous injector for liquid medicine at one end thereof, said reservoir being adapted to constrict in a normal condition and to expand when liquid medicine from said first continuous injector is being charged into said reservoir so as to contain a maximum quantity of liquid medicine; and

a second continuous injector for liquid medicine having an inlet portion connected to the other end of said reservoir, said second continuous injector being adapted to receive liquid medicine from said reservoir and to continuously discharge liquid medicine stored in said second continuous injector through a control path in an outlet portion for a given period of time, and wherein said second continuous injector has a second cylindrical body and a second balloon disposed therein, attached to the periphery of said cylindrical body.

2. A portable painkilling system according to claim 1, wherein said outlet portion is made of an elongate flexible tube having a small inner diameter.

3. A portable painkilling system according to claim 1 or 2, wherein said reservoir is a syringe type reservoir.

4. A portable painkilling system according to claim 1 or 2, wherein said reservoir is a bag type reservoir.

5. A portable painkilling system according to claim 1 or 2, wherein said reservoir is a bellows type reservoir.

6. A portable painkilling system according to claim 1 or 2, wherein said reservoir is a circular button type reservoir.

7. A portable painkilling system according to claim 1, wherein said reservoir is a dome type reservoir.

8. A portable painkilling system according to claim 1 or 2, wherein said reservoir is a multi-stepped, button type reservoir.

9. A portable painkilling system according to claim 1 or 2, wherein said reservoir is a tandem chamber type reservoir.