Dialysis liquid circuit, dialysis apparatus comprising a dialysis liquid circuit, method for detecting air in a dialysis liquid flowing through a dialysis liquid circuit, and use of a gas sensor in a dialysis liquid circuit

US8465641B2 · kind B2 · utility

Assignee

• Fresenius Medical Care Deutschland GmbH · DE

Inventors

• Andreas Maierhofer · Schweinfurt, DE
• Alfred Gagel · Litzendorf, DE
• Malte Gross · Schweinfurt, DE

Key dates

• Filing date: Jul 30, 2008
• Grant date: Jun 18, 2013
• Expiry date: Dec 30, 2029

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61M2205/15
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A dialysis liquid circuit with conduits for conducting dialysis liquid and elements for detecting air in the dialysis liquid. The elements includes at least one gas sensor traversed continuously by the dialysis liquid, which is configured such that it measures at least one property of the dialysis liquid which depends on the presence of air bubbles in the dialysis liquid, and which is arranged downstream of a region to be monitored of the dialysis liquid circuit. During operation of the dialysis liquid circuit a negative pressure exists with respect to atmospheric pressure, and the elements includes an evaluation unit which is connected with the gas sensor and which is configured such that the property measured by means of the gas sensor is evaluated with regard to the presence of air bubbles in the dialysis liquid.