Fluid infusion systems and methods

US10632298B2 · kind B2 · utility

Assignee

• CAREFUSION 303, INC. · US

Inventors

• Robert D. Butterfield · Poway, US
• Scott Hellen · San Diego, US
• Vaclav Barina · Middletown, US
• Allison Leigh Barry · San Jose, US
• Julie Chang · Newark, US
• Jeanette M. Liu · Monterey Park, US
• Huy Quang Nguyen · Calabasas, US
• Michelle Wei · Arcadia, US
• Samuel A. Derose · San Diego, US
• Thendral Govindaraj · San Diego, US
• Samantha Hoang · San Diego, US
• Andrew L. Marino · San Diego, US
• Raul Sun Han Chang · San Diego, US
• Arthur Y. Chang · San Diego, US
• Deval Gupta · Bengaluru, IN

Key dates

• Filing date: Jan 12, 2017
• Grant date: Apr 28, 2020
• Expiry date: Apr 15, 2038

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61M39/281
• WIPO field: Medical technology
• WIPO sector: Instruments

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.