Abstract: An ultrasound-based air bubble and/or solid detector comprising an ultrasonic transmitter for transmitting ultrasound through a medium to be examined, wherein the ultrasound is adapted to be received by an ultrasonic receiver. Energy input of the ultrasound into a medium to be monitored may be limited and/or monitored and/or adapted.

Abstract: An ultrasound-based air bubble and/or solid detector comprising an ultrasonic transmitter for transmitting ultrasound through a medium to be examined, wherein the ultrasound is adapted to be received by an ultrasonic receiver. Energy input of the ultrasound into a medium to be monitored may be limited and/or monitored and/or adapted.

Abstract: A medical instrument, in particular a machine for extracorporeal blood treatment, allows for execution of different programs with selectable program parameters. The medical instrument (11) comprises a read unit (14) which is capable of communicating with a transponder (15) carried along by the personnel. Said transponder (15) contains an identification (ID). In dependence on the identification, different access authorizations with regard to selecting programs and/or modifying program parameters are granted. In this manner, it is determined what settings and/or modifications may be carried out by the nursing personnel and what settings and/or modifications may be carried out by the technical service personnel.