Device for simultaneously carrying out blood group determination, serum cross-check and antibody detection test

A device for the simultaneous and qualitative or quantitative determination of a plurality of analytes, wherein at least one of the plurality of analytes is a cellularly bonded analyte, in a liquid sample, the device comprising:

• a single membrane with an application zone for the application of the liquid sample,
• at least one group of at least two indicator zones, which are able to interact with the analytes, and
• at least one absorption region which takes up the liquid after having passed the indicator zones;
• wherein the indicator zones are located between the application zone and the absorption region;
• wherein the at least two indicator zones are positioned on the membrane substantially parallel and absent a physical divider between indicator zones, the at least two indicator zones comprise at least two types of indicator particles of which at least one type being erythrocytes;
• and
• wherein the at least two indicator zones comprise a first indicator zone containing a bonding element for binding the cellularly bound analyte and the at least two indicator zones comprise a second indicator zone containing a binding element for binding an analyte comprising an erythrocyte in the liquid sample, wherein the erythrocyte serves as both the indicator particle and the analyte.