Disposable infusion device with air trapping collapsible reservoir

• US 7,632,247 B2
• Filed: 09/06/2006
• Issued: 12/15/2009
• Est. Priority Date: 09/06/2006
• Status: Active Grant

• Current Assignee: Calibra Medical, Inc. (CeQur SA)
• Original Assignee: Calibra Medical, Inc. (CeQur SA)
• Inventors: Adams, John M.
• Primary Examiner(s): Desanto; Matthew F
• Application Number:
  US11/516,467
• Publication Number:
  US 20080097318A1
• Time in Patent Office: 1,196 Days
• Field of Search: 604131-157, 60428801-28804, 604/890.1, 604/891.1, 604/892.1, 604212-216
• US Class Current: 604/131
• CPC Class Codes: A61M 5/14228 with linear peristaltic action, i.e. comprising at least three pressurising members or a helical member
• CPC Class Codes: A61M 5/14248 of the skin patch type
• CPC Class Codes: A61M 5/36 with means for eliminating or preventing injection or infusion of air into body dialysis systems, blood oxygenators A61M1/14; haemofiltration equipment A61M1/34; automatic tube cut-off A61M39/281

Abstract

A wearable infusion device delivers a liquid medicant to a patient. The infusion device comprises a reservoir arranged to contain a liquid medicant to be delivered beneath a patient'"'"'s skin. The reservoir has an outlet through which the medicant flows and a shape that forms at least one pocket that traps air isolated from the outlet. The infusion device further includes a conduit communicating with the outlet of the reservoir, and a pump that causes the medicant to flow from the reservoir into the conduit.

Claims

1. A wearable infusion device comprising:

a base having an adhesive surface for adhering the device to a patient'"'"'s skin;

a reservoir arranged to contain a liquid medicant to be delivered beneath a patient'"'"'s skin, the reservoir formed of flexible sheet material joined along a seal line, having an outlet through which the medicant flows and a shape that forms a plurality pockets that trap air isolated from the outlet, the shape including a plurality of raised regions along the seal line to form the pockets;

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

a pump in fluid communication with the reservoir outlet that causes the medicant to flow from the reservoir into the cannula.

2. The device of claim 1, wherein each raised region comprises a pointed region.

3. The device of claim 2, wherein each pointed region includes concave side walls.

4. The device of claim 1, wherein the raised regions are along a common side of the reservoir.