Infusion device with piston pump

• US 20070299401A1
• Filed: 02/12/2007
• Published: 12/27/2007
• Est. Priority Date: 03/16/2006
• Status: Active Grant

• Current Assignee: Calibra Medical, Inc. (CeQur SA)
• Original Assignee: Seattle Medical Technologies
• Inventors: Hawkins, Daniel, Adams, John, Alferness, Clifton
• Granted Patent: US 8,114,064 B2
• Time in Patent Office: Days
• US Class Current: 604/152
• CPC Class Codes: A61M 2005/1405 Patient controlled analgesia [PCA]
• CPC Class Codes: A61M 2005/1426 with means for preventing access to the needle after use
• CPC Class Codes: A61M 2005/1585 Needle inserters
• CPC Class Codes: A61M 2005/1587 suitable for being connected to an infusion line after insertion into a patient
• CPC Class Codes: A61M 2025/0266 using pads, patches, tapes or the like
• CPC Class Codes: A61M 5/1408 in parallel, e.g. manifolds, sequencing valves access sites A61M39/02; tube connectors A61M39/10
• CPC Class Codes: A61M 5/14248 of the skin patch type
• CPC Class Codes: A61M 5/1452 pressurised by means of pistons
• CPC Class Codes: A61M 5/14526 the piston being actuated by fluid pressure
• CPC Class Codes: A61M 5/1454 spring-actuated, e.g. by a clockwork
• CPC Class Codes: A61M 5/16881 Regulating valves on-off valves, e.g. clamps A61M39/28

Abstract

A disposable infusion device comprises a base, a cannula arranged to extend from the base to beneath the patient'"'"'s skin to deliver a liquid medicament to the patient, and a source arranged to provide the cannula with a liquid medicament. The source comprises a piston pump.

Claims

1. A disposable infusion device comprising:

a base;

a cannula arranged to extend from the base to beneath the patient'"'"'s skin to deliver a liquid medicament to the patient; and

a source arranged to provide the cannula with a liquid medicament, the source comprising a piston pump.

2. The device of claim 1, wherein the base is arranged to adhere to a patient'"'"'s skin.

3. The device of claim 1, the piston pump is a fixed stroke piston pump.

4. The device of claim 1, wherein the source includes a reservoir for holding the liquid medicament and wherein the piston pump is arranged for pumping the liquid medicament from the reservoir to the cannula.

5. The device of claim 4, further comprising a one way valve between the reservoir and the piston pump.

6. The device of claim 4, further comprising a one way valve between the piston pump and the cannula.

7. The device of claim 4, further comprising a first one way valve between the reservoir and the piston pump and a second one way valve between the piston pump and the cannula.

8. The device of claim 4, further comprising a port communicating with the reservoir to receive the liquid medicament from an instrument external to the device to fill the reservoir.

9. A disposable infusion device comprising:

a base adapted to adhere to a patient'"'"'s skin;

a cannula arranged to extend from the base to beneath the patient'"'"'s skin to deliver a liquid medicament to the patient;

a reservoir for containing the liquid medicament; and

a piston pump that pumps the liquid medicament from the reservoir to the cannula.

10. A disposable infusion device comprising:

a base arranged to adhere to a patient'"'"'s skin;

a cannula arranged to extend from the base to beneath the patient'"'"'s skin to deliver a liquid medicament to the patient;

a source arranged to provide the cannula with a liquid medicament; and

an actuator that actuates the source to provide the liquid medicament to the cannula,

the source being arranged to provide, with each actuation, a fixed volume of medicament to the cannula.

11. The device of claim 10, wherein the source includes a fixed volume pump arranged to provide, with each actuation, the fixed volume of medicament to the cannula.

12. The device of claim 11, wherein the fixed volume pump is a piston pump.