Julie M Chang

US Patent:

20170120035, May 4, 2017

Filed:

Jan 12, 2017

Appl. No.:

15/405213

Inventors:

- San Diego CA, US
Scott Hellen - San Diego CA, US
Vaclav Barina - Middletown NY, US
Allison Leigh Barry - San Jose CA, US
Julie Chang - Walnut CA, US
Jeanette M. Liu - Monterey Park CA, US
Huy Quang Nguyen - Winnetka CA, US
Michele Wei - Arcadia CA, US
Samuel A. Derose - San Diego CA, US
Thendral Govindaraj - San Diego CA, US
Samantha Hoang - San Diego CA, US
Andrew L. Marino - San Diego CA, US
Raul Sun Han Chang - San Diego CA, US
Arthur Y. Chang - San Diego CA, US
Deval Gupta - San Diego CA, US

International Classification:

A61M 39/22
A61M 5/14
A61M 39/28

Abstract:

Systems and methods are disclosed for controlling the flow of fluids in a fluid infusion system. The system may include first and second fluid containers, first and second tubes coupled to the first and second fluid containers, and an external valve coupled to the second tube and configured to be attached to the first tube. The valve may be configured to shape the first tube to form a valve region which is opened or closed by an actuating element in the valve that is driven by hydrostatic pressure from the second tube. A full second container may generate a pressure that is concentrated through a diaphragm onto a pin which presses on the shaped first tube region, closing it to allow only fluid from the second container to flow. When the fluid level in the second line falls reducing pressure, the pin's force reduces until the first tube is opened.