[Two new oncometers--results of a comparative study]

In the course of a series of measurements of colloid oncotic pressure two newly introduced instruments were compared with an approved standard COD-measuring device as to accuracy and operational comfort. While the comparative tests produced practically identical results one instrument (number 2; Osmomat 050) did stand out for high precision but concerning speed of adjustment and simplicity in handling it was somewhat inferior to number 1 (BMT 921). The importance of repeated (or quasi on line) clinical control of colloid osmotic pressure by the aid of newly developed instruments now rather easy to operate is briefly outlined.