[Determination of creatine kinase activity using bioluminescence].

There is given a simple apparatus for monitoring of CK-activities by means of a bioluminescent test. This test makes it possible to determine CK-activities in 1 microliter serum samples as well as in dried blood spots. A good correlation between the bioluminescent test and a standard method was found. The sensitivity of the method is very high and suitable for a screening of affected boys with Duchenne's muscular dystrophy.