Fluid delivery apparatus

• US 5,620,420 A
• Filed: 05/01/1995
• Issued: 04/15/1997
• 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:
  US08/432,219
• Time in Patent Office: 715 Days
• Field of Search: 604/122, 604/131, 604/132, 604/149, 604/153, 604/257, 604/890.1, 128/DIG. 12
• US Class Current: 604/133
• CPC Class Codes: A61M 2205/197 by the seal material
• 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 an elastic distendable membrane, which, in cooperation with a thin planar base defines a fluid chamber having a fluid outlet. Disposed within the fluid chamber is a thin fluid permeable member which precisely controls the rate of fluid flow through the fluid outlet.

Claims

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

(a) a base having a fluid inlet and a fluid outlet interconnected by a fluid flow path;

(b) filling means for introducing fluid into said fluid inlet;

(c) a deformable membrane which is fitted over said base to define a chamber in communication with said fluid inlet and said fluid outlet, said membrane being movable from a first position to a second position whereby fluid within said chamber will be expelled through said fluid outlet;

(d) an expandable member disposed outside said chamber and in contact with said membrane for moving said membrane from said first position to said second position; and

(e) a cover superimposed over said base and said expandable member to form an enclosure, said cover including venting means for venting to atmosphere gases contained within said enclosure.

2. A device as defined in claim 1 in which said cover includes top and side walls, said top wall being porous.

3. A device as defined in claim 2 in which said cover is sealably connected to said base.

4. A device as defined in claim 3 further including cushioning means affixed to said base for engagement with the skin of the patient.

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

(a) a base having an upper surface, a lower surface, and a fluid inlet and a fluid outlet interconnected by a fluid flow path said lower surface being adapted to be disposed in close proximity with the skin of the patient;

(b) filling means for introducing fluid into said fluid inlet;

(c) a deformable membrane which is fitted over said upper surface of said base to define a chamber in communication with said fluid inlet and said fluid outlet, said membrane being movable from a first position to a second position whereby fluid within said chamber will be expelled through said fluid outlet;

(d) an expandable member disposed outside said chamber and in contact with said membrane for moving said membrane from said first position to said second position; and

(e) a cover superimposed over said base and said expandable member to form an enclosure, said cover including venting means for venting to atmosphere gases contained within said enclosure.

6. A device as defined in claim 5 in which at least a portion of said cover is porous.

7. A device as defined in claim 6 further including cushioning is affixed to said lower surface of said base for engagement with the skin of the patient.