Pulsion Medical Systems Se

Mark Konrad

Sergej Kammerzell

Maarten Willem Nicolaas Nijsten

Wolfgang Huber

The invention relates to a system for determining a cardiovascular parameter in a patient, wherein the system is adapted to work in conjunction with an extracorporeal blood treatment device (ECBTD) connectable to a patient's vascular system, wherein the ECBTD comprises a first circuit, the system comprising: a liquid-filled, second circuit thermally connected to the first circuit of the ECBTD via a heat exchanger, temperature changing means for generating a temperature change in the second circuit, temperature sensors TS2up and TS2down arranged in the second circuit upstream and downstream of the heat exchanger, respectively. A computer system connected to the temperature sensors and the temperature changing means is adapted to induce a temperature bolus within the first circuit of the ECBTD via the temperature changing means. From the individual temperature recorded as a function of time, temperature curves T2up(t) and T2down(t) are derived and evaluated.

System, computer system and computer program for determining a cardiovascular parameter

The system interacts with an apparatus for extracorporeal blood treatment, which is connected to the venous vascular system of a patient via an inflow line and an outflow line. Temperature influencing means for causing an initial local temperature deviation Tin the vicinity of a first point of the vascular system, as a result of which a traveling temperature change is introduced into the blood flow of the patient, a first temperature sensor for measuring the local temperature of the blood at a second point of the vascular system downstream of the first point, and a second temperature sensor for measuring the local temperature of the blood in the inflow line are provided. A computer system records the local blood temperature measured at the second point and at the inflow line, in each case as a function of time, and ascertains and evaluates a first and second thermodilution curve (TDK, TDK). A temperature deviation TEKBV, which is to be allocated to the extracorporeal blood treatment apparatus, is determined from the second thermodilution curve, and Tand TEKBV are correlated to one another for the purposes of determining the cardiovascular parameter.

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Munich, Germany

Mark Konrad