BLOOD TREATMENT DEVICE COMPRISING A FUNCTIONAL UNIT FOR CARRYING OUT THE BLOOD TREATMENT AND METHOD FOR MONITORING THE FUNCTIONALITY AND/OR THE OPERATING STATE OF THE FUNCTIONAL UNIT

摘要

The invention relates to a blood treatment device comprising a fastening unit (7) for fastening a functional unit (1), which is provided for single use, for carrying out the blood treatment. The blood treatment device according to the invention is distinguished by a monitoring unit (8) for monitoring the functionality and/or the operating state of the functional unit (1), which comprises at least one light transmitter (17A, 18A) and at least one light receiver (17B, 18B). In the monitoring unit (8) according to the invention, the light transmitter and light receiver are arranged on one side of the functional unit (1). Arranging the light transmitter and light receiver on the same side offers the advantage that the monitoring unit (8) can be integrated into the fastening unit (7) of the blood treatment device without major structural changes. Monitoring of the functional unit is based on an optical measurement method, in which the light reflected at a part of the functional unit (1) or at a part of the fastening unit (7) is detected. A computation and evaluation unit (13) is configured in such a way that a faulty state and/or a specific operating state of the functional unit is deduced from the intensity of the light falling onto the functional unit (1) and of the light reflected at the functional unit or fastening unit.