DEVICE AND METHOD FOR MONITORING A VASCULAR ACCESS FOR AN EXTRACORPOREAL BLOOD TREATMENT

摘要

The invention relates to a device and a method for monitoring an access to a patient for an extracorporeal blood treating device comprising an extracorporeal blood circuit. The invention further relates to an extracorporeal blood treating device comprising a device for monitoring the vascular access. The device according to the invention and the method according to the invention are based on monitoring a characteristic property of the blood in particular the concentration of hemoglobin in the blood that flows in the arterial blood line of the extracorporeal blood circuit I of an extracorporeal blood treating device A. In an incorrect vascular access the flow conditions in the communicating intra and extracorporeal blood circulation system change. Said changes of the flow conditions are detectable as a change in the hemoglobin concentration. A disconnection of the venous puncture cannula (8) for the patient access is determined by a decrease of the hemoglobin concentration in the blood in the arterial blood line (6).