Automated dialysis pumping system using stepper motor

US7789849B2 · kind B2 · utility

Assignees

• Baxter International Inc. · US
• Baxter Healthcare SA · CH

Inventors

• Don Busby · Tampa, US
• Peter A. Hopping · Lutz, US
• Robert W. Childers · Holiday, US
• Shahid Din · Palm Harbor, US
• Brian Lauman · Clearwater, US
• Rick Kienman · Tampa, US
• Ian Richardson · Clearwater, US
• Joseph H. Bowman, Jr. · Lake Villa, US
• Loren M. Lundtveil · Wadsworth, US
• Jose Alvaro · Vernon Hills, US
• Bruce Ming-Da Eu · Vernon Hills, US
• Sherwin Shang · Vernon Hills, US

Key dates

• Filing date: Dec 21, 2006
• Grant date: Sep 7, 2010
• Expiry date: Aug 25, 2028

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61M2205/583
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A peritoneal dialysis system includes: (i) an enclosure; (ii) a stepper motor housed by the enclosure; (iii) a pump head in operable communication with the stepper motor; and (iv) a disposable unit including at least one flexible membrane attached to a rigid piece, the enclosure configured to receive the disposable unit such that the stepper motor can move the pump head towards and away from the flexible membrane to cause, (a) the flexible membrane to move outwardly with respect to the rigid piece as the pump head is moved away from the disposable unit, and (b) the flexible membrane to move inwardly with respect to the rigid piece as the pump head is moved away from the disposable unit.