Cardioplegic controlling and regulating system

US4529397A · kind A · utility

Assignee

• Sartorius AG · DE

Inventors

• Kurt Hennemuth · Northeim, DE
• Heinz-Gerhard Kohn · Dransfeld, DE
• Erich Knothe · Bovenden, DE
• Gunter Pradel · Göttingen, DE

Key dates

• Filing date: Jul 24, 1983
• Grant date: Jul 16, 1985
• Expiry date: Jul 24, 2003

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61M2205/3393
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A cardioplegic controlling and regulating device for the dosed perfusion of cardioplegic perfusion solution in open-heart surgery has a storage container for receiving the cardioplegic solution, which container is part of a scale and can be connected to the heart over a tubular conduit. A pressure-controlled dosing pump which acts on the tubular conduit and cooperates with a second, reversible pump which is constructed as an exhaust pump and is selectively operable synchronously or asynchronously within controllable tolerance limits with the first dosing pump during the perfusion and sustaining of the perfusion. An ultrafilter for the mixture of blood and cardioplegic solution removed from the patient's heart is located in a removal line. An outlet for the blood separated form the ultrafilter is connected by a conduit to a blood storage container and the permeate or filtrate outlet of which ends in a filtrate line or in a filtrate collector vessel. The ultrafilter is located in a by-pass line to a blood storage container so that the patient's blood mixed with cardioplegic solution can be prepared to a hemoconcentrate after the perfusion has been completed. In the same manner, other…