Automated peritoneal dialysis system using stepper motor

US10137235B2 · 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. Lundtveit · Wadsworth, US
• Jose Alvaro · Vernon Hills, US
• Bruce Ming-Da Eu · Taiwa, JP
• Sherwin Shang · Vernon Hills, US

Key dates

• Filing date: Dec 12, 2014
• Grant date: Nov 27, 2018
• Expiry date: Jan 19, 2036

Classification

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

Abstract

An embodiment of a peritoneal dialysis system includes an enclosure, a door hingedly attached to the enclosure, a stepper motor housed by the enclosure, a solid pump piston in operable communication with the stepper motor and including a solid pump shaft attached to or integrally formed with a solid pump head, and a disposable unit contacting the enclosure and the door. The disposable unit includes a moveable membrane operable with the solid pump head. The stepper motor is configured to move the solid pump head towards and away from the disposable unit. The system further includes a position detection apparatus operable with the stepper motor and located to provide an output indicative of a position of the solid pump head relative to a reference position.