An apparatus is provided for monitoring a predetermined parameter of a patient's body fluid while infusing an infusion fluid into the patient. The apparatus comprises an infusion line and a catheter configured for insertion into a blood vessel of the patient, and a reversible infusion pump connected...http://www.google.de/patents/US20070060872?utm_source=gb-gplus-sharePatent US20070060872 - Apparatus and methods for analyzing body fluid samples
