Patent ID: 8784353
Filing Date: 2014-07-22
Classification: A61M,F16K

Abstract:
1. A device for reversing blood flow, for an extra-corporeal blood treating apparatus which comprises an extra-corporeal blood circuit which has an arterial blood line outgoing from a patient which runs to a blood treating unit and a venous blood line outgoing from the blood treating unit which runs to the patient, the device for reversing flow comprising: a first valve-action body having a first patient-side connection for a first patient-side portion, formed of flexible tubing, of the blood line and a second patient-side connection for a second patient-side portion, formed of flexible tubing, of the blood line, a second valve-action body having a first apparatus-side connection for a first apparatus-side portion, formed of flexible tubing, of the blood line and a second apparatus-side connection for a second apparatus-side portion, formed of flexible tubing, of the blood line, the first and second valve-action bodies being rotatable with respect to each other on an axis in such a way that, a communications arrangement configured to receive a high-frequency electromagnetic field from a reading arrangement belonging to the extra-corporeal blood treating apparatus and to generate at least one code which is characteristic of one of the first and second relative positions of the valve-action bodies and which is readable by the reading arrangement; wherein the communications arrangement includes a first RFID transponder and a second RFID transponder configured to identify a direction of blood flow, the first RFID transponder configured to transmit a code which is characteristic of the first relative position and the second RFID transponder configured to transmit a code which is characteristic of the second relative position; wherein the first RFID transponder is arranged at a point on the first or second valve-action body which is characteristic of the first relative position, and the second RFID transponder is arranged at a point on the first or second valve-action body which is characteristic of the second relative position, and the first and/or second valve-action body is screened off electrically in such a way that, in the first relative position, only the first RFID transponder configured to transmit the code characteristic of the first relative position is readable by the reading arrangement, and, in the second relative position, only the second RFID transponder configured to transmit the code characteristic of the second position is readable by the reading arrangement.