Multiple reservoir implantable drug infusion device and method

• US 20100089487A1
• Filed: 10/22/2008
• Published: 04/15/2010
• Est. Priority Date: 03/05/2008
• Status: Active Grant

• Current Assignee: FLO, LLC
• Original Assignee: Flowonix Medical, Inc.
• Inventors: O'Connor, Patrick J., Buckman, Joshua L., Burke, Paul F.
• Granted Patent: US 8,545,477 B2
• Time in Patent Office: Days
• US Class Current: 141/2
• CPC Class Codes: A61M 5/14276 specially adapted for implantation
• CPC Class Codes: A61M 5/1486 the bags being substantially completely surrounded by fluid
• CPC Class Codes: A61M 5/16809 by repeated filling and emptying of an intermediate volume pressure infusion using positive displacement pumps A61M5/142
• CPC Class Codes: A61M 5/16827 controlling delivery of multiple fluids, e.g. sequencing, mixing or via separate flow-paths infusion of multiple fluids without using a controller A61M5/1407

Abstract

Multiple reservoir implantable valve accumulator pump for the delivery of medication, and method of infusate delivery. The apparatus includes at least first and second infusate reservoirs in a common pressure chamber, each in fluid communication with a metering assembly. The metering assembly includes an accumulator that is preferably a fixed volume accumulator having an inlet and an outlet. A first valve is in fluid communication with the first infusate reservoir and an inlet of the accumulator, and a second valve is in fluid communication with the second infusate reservoir and an inlet of the accumulator. An outlet valve is in fluid communication with the outlet of the accumulator. The accumulator can be filled with infusate from the first and second infusate reservoirs sequentially, can be filled from the first infusate reservoir multiple times consecutively, the second infusate reservoir multiple times consecutively, or any combination or permutation thereof.

Claims

1. A method of independently introducing infusate into an accumulator from at least two separate infusate sources, comprising:

providing a pressure chamber;

providing a first infusate reservoir in said pressure chamber, said first infusate reservoir adapted to contain a first infusate;

providing a second infusate reservoir in said pressure chamber, said second infusate reservoir adapted to contain a second infusate;

providing a metering assembly comprising an accumulator in fluid communication with said first infusate reservoir via a first valve and in fluid communication with said second infusate reservoir via a second valve, and an outlet valve in communication with an outlet of said accumulator;

introducing a first infusate into said first infusate reservoir;

introducing said first infusate from said first infusate reservoir into said accumulator by opening said first valve while said second valve and said outlet valve are in a closed position;

emptying said accumulator of said first infusate by opening said outlet valve while said first and second valves are closed.

2. The method of claim 1, further comprising:

introducing a second infusate into said second infusate reservoir;

introducing said second infusate from said second infusate reservoir into said accumulator by opening said second valve while said first valve and said outlet valve are in a closed position; and

emptying said second infusate from said accumulator by opening said outlet valve while said first and second valves are in a closed position.

3. The method of claim 1, wherein said first infusate reservoir is filled with said first infusate, and said accumulator is filled with and then emptied of said first infusate, multiple times before said second infusate is introduced into said second infusate reservoir.