Patent ID: 7537687
Filing Date: 2009-05-26
Classification: A61M

Abstract:
1. A hemodialysis device for purifying blood collected from a patient comprising; a blood circuit comprising an arterial blood circuit and a venous blood circuit which circulates the blood extracorporeally; a blood pump disposed in the arterial blood circuit; a blood purification device that is connected between the arterial blood circuit and the venous blood circuit and purifies the blood flowing in the blood circuit; a main body having a dialysate inlet line and a dialysate outlet line which inlet and outlet dialysate to and from the blood purification device, respectively; a voltage adding device comprising one electrode and another electrode adding voltage to the blood flowing in the blood circuit between the electrodes; a measuring device detecting electric potentials of at least two positions accompanying the voltage added by the voltage adding device; and a monitor calculating a calculated electric potential by comparing each electric potential detected by the measuring device and monitoring a detachment of an arterial blood needle or a venous blood needle from the patient; wherein one electrode of the voltage adding device is disposed between the arterial blood needle in the arterial blood circuit and the blood pump and the other electrode is disposed in the dialysate inlet line or the dialysate outlet line.