Multi-reservoir implantable pump with patient controlled actuation

• US 20060271021A1
• Filed: 05/25/2005
• Published: 11/30/2006
• Est. Priority Date: 05/25/2005
• Status: Active Grant

• Current Assignee: Aqulinx Medical, Inc.
• Original Assignee: Palyon Medical Corporation
• Inventors: Steinbach, Bernd
• Granted Patent: US 8,034,029 B2
• Time in Patent Office: Days
• US Class Current: 604/891.100
• CPC Class Codes: A61M 5/141 with capillaries for restricting fluid flow
• CPC Class Codes: A61M 5/14276 specially adapted for implantation
• CPC Class Codes: A61M 5/14593 the diaphragm being actuated by fluid pressure
• CPC Class Codes: A61M 5/155 pressurised by gas introduced into the reservoir
• 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

A multiple reservoir or chambered implantable pumps is disclosed. The pump according to the present invention is particularly useful in allowing for multiple constant flow rates to be provided from an otherwise constant flow implantable pump. The pump is also useful in allowing for housing of multiple active substances. A multiple reservoir implantable pump is also disclosed, which has at least one chamber capable of providing a constant flow rate and at least one chamber capable of being utilized for patient controlled injections.

Claims

1. An implantable pump comprising:

a housing defining at least a first, second and third chamber;

an outlet in fluid communication with said first chamber; and

,

a patient controlled actuation mechanism in fluid communication with said second chamber;

wherein said third chamber is juxtaposed between two flexible membranes.

2. The implantable pump according to claim 1, wherein said third chamber houses a propellant capable of expanding isobarically.

3. The implantable pump according to claim 2, wherein said expansion causes fluid contained within said first and second chambers to be dispelled therefrom.

4. The implantable pump according to claim 1, wherein said patient controlled actuation mechanism includes a valve assembly capable of being actuated by the patient.

5. The implantable pump according to claim 4, wherein selective operation of said valve assembly is accomplished by one or more magnets.

6. The implantable pump according to claim 4, wherein said valve assembly further includes a first cylinder housing a first piston, and a second cylinder housing a second piston.

7. The implantable pump according to claim 6, wherein displacement of said first piston causes actuation of a dose of an active substance to a patient.

8. The implantable pump according to claim 7, further comprising means for selectively actuating said one or more magnets.

9. The implantable pump according to claim 8, further comprising means for preventing over medication of a patient.