Fluid delivery apparatus

• US 5,693,019 A
• Filed: 12/20/1995
• Issued: 12/02/1997
• Est. Priority Date: 06/16/1989
• Status: Expired due to Fees

• Current Assignee: Pescadero Beach Holdings Corporation
• Original Assignee: Science Incorporated
• Inventors: Kriesel, Marshall S.
• Primary Examiner(s): MCDERMOTT, CORRINE MARIE
• Application Number:
  US08/575,345
• Time in Patent Office: 713 Days
• Field of Search: 604/131, 604/132, 604/151, 604/153, 604/246, 604/257, 604/890.1, 128/DIG. 12
• US Class Current: 604/132
• CPC Class Codes: A61J 1/201 having one piercing end
• CPC Class Codes: A61J 1/2075 for external venting
• CPC Class Codes: A61J 1/2082 for gas filtration
• CPC Class Codes: A61J 1/2096 Combination of a vial and a syringe for transferring or mixing their contents
• CPC Class Codes: A61M 2205/197 by the seal material
• CPC Class Codes: A61M 2209/045 for filling, e.g. for filling reservoirs
• CPC Class Codes: A61M 5/1407 Infusion of two or more substances
• CPC Class Codes: A61M 5/1409 in series, e.g. first substance passing through container holding second substance, e.g. reconstitution systems needle sets A61M5/162
• CPC Class Codes: A61M 5/14248 of the skin patch type
• 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: Y10S 128/12 Pressure infusion

Abstract

An apparatus for accurately infusing medicinal agents into an ambulatory patient at specific rates over extended periods of time. The apparatus is of a compact, low profile, laminate construction and includes either an elastic distendable membrane, or a thin barrier member which, in cooperation with a thin planar base defines a fluid chamber having a fluid outlet. The apparatus includes an internal stored energy source which functions to controllably expel the medicinal agents from the apparatus. The stored energy source may comprise either a distendable elastomeric membrane of an expandable sponge like cellular mass.

Claims

1. A fluid delivery device for delivering fluids to a patient at a controlled rate comprising:

(a) a base having first and second portions, said base having a fluid port;

(b) a barrier overlaying said base;

(c) at least one expandable member disposed in contact with said barrier;

(d) cover means receivable over said base for sealably enclosing said barrier and said at least one expandable member, said cover member having a plurality of interior wall portions defining a plurality of chambers superimposed over said base;

(e) a fluid passageway interconnecting said plurality of chambers, said fluid passageway being in communication with said fluid port; and

(f) fluid flow means in communication with said fluid port for introducing fluid between said cover means and said barrier;

said barrier being movable from a first position proximate said plurality of wall portions of said cover means to a second position upon introduction of fluid under pressure into said fluid flow means, said barrier moving said at least one expandable member from a first expanded position to a second compressed position upon said barrier member moving to said second position.

2. A device as defined in claim 1 in which said at least one expandable member comprises an elastically deformable cellular structure.

3. A device as defined in claim 1 in which said at least one expandable member comprises a polymer foam.

4. A device as defined in claim 1 including fluid flow control means in communiction with said fluid passageway for controlling fluid flow into said fluid passageway.

5. A device as defined in claim 1 in which said fluid flow means comprises fluid inlet ports provided in said cover means.

6. A device as defined in claim 1 comprising first and second expandable members.

7. A device as defined in claim 1 comprising first, second and third expandable members.

8. A device as defined in claim 1 further including rate control means in communication with said fluid passageway for controlling the rate of fluid flow through said fluid passageway.

9. A device as defined in claim 1 further including fluid flow control means in communication with said fluid passageway for controlling fluid flow through said fluid passageway, said flow control means comprising a plurality of control mechanisms, each being movable between a first position blocking fluid flow into a second position permitting flow.

10. A device as defined in claim 1 in which said fluid flow means comprises fill port means carried by said cover means for introducing fluid between said barrier and said chamber defining walls of said cover means.

11. A device as defined in claim 10 in which said fill port means comprises a plurality of septum assemblies carried by said cover means.

12. A fluid delivery device for delivering fluids to a patient at a controlled rate comprising:

(a) a base having first, second and third adjacent portions and a fourth marginal portion circumscribing said first, second and third portions, said base having a fluid port;

(b) a flexible member overlying said first, second and third portions of said base;

(c) first, second and third expandable members disposed in contact with said flexible member;

(d) cover means receivable over said base for encapsulating said flexible member, said cover member having a first chamber defining wall superimposed over said first portion of said base, a second chamber defining wall superimposed over said second portion of said base, a third chamber defining wall superimposed over said third portion of said base, and marginal means for urging said flexible member into sealing engagement with said fourth portion of said base; and

(e) a fluid passageway interconnecting said first, second and third chambers;

said fluid passageway being in communication with said fluid port of said base, said flexible member being movable from a first position proximate said first, second and third chamber defining walls of said cover means to a second position upon introduction of fluid under pressure into said fluid port of said base, said flexible member moving said expandable members from a first expanded position to a second compressed position upon said flexible member moving to said second position.

13. A device as defined in claim 12 in which each of said first, second and third portions of said base include a sump for receiving said expandable members.

14. A device as defined in claim 12 further including fluid flow control means disposed within said fluid passageway for controlling fluid flow through said fluid passageway, said flow control means comprising a plurality of control mechanisms, each being movable between a first position blocking fluid flow into a second position permitting flow.

15. A device as defined in claim 14 in which said control mechanisms comprise push button type closures.

16. A device as defined in claim 14 in which said fluid port includes means for introducing fluid between said flexible member and said chamber defining wall of said cover means, said means comprising at least one septum assembly.

17. A fluid delivery device for delivering fluids to a patient at a controlled rate comprising:

(a) a base having first, second and third adjacent sump-like portions and a fourth marginal portion circumscribing said first, second and third portions, said base having a fluid port;

(b) an expandable member receivable within each of said first, second and third sump-like portions;

(c) a deformable membrane overlying said expandable members;

(d) cover means receivable over said base for encapsulating said membrane and said expandable members, said cover member having a first reservoir defining chamber superimposed over said first portion of said base, a second reservoir defining chamber superimposed over said second portion of said base, a third reservoir defining chamber superimposed over said third portion and marginal means for urging said membrane into sealing engagement with said fourth marginal portion of said base;

said cover means further including first, second and third fluid inlet ports; and

(e) a fluid passageway interconnecting said first, second and third reservoir defining chambers, said fluid passageway being in communication with said first, second and third inlet ports of said cover means;

said membrane being movable from a first position to a second deformed position upon the introduction of fluid under pressure into said fluid inlet ports of said cover means, said membrane moving said expandable members from a first position to a second compressed position, said members having a tendency to return to their first position.

18. A device as defined in claim 17 further including fluid flow control means disposed within said fluid passageway for controlling fluid flow through said fluid passageway.

19. A device as defined in claim 17 further including first, second and third septum assemblies mounted within said first, second and third fluid inlet ports.