Rapid determination of proteins in serum and cerebrospinal fluid by laser-nephelometry.

The Laser-nephelometric technique is characterized by its easy handling, accuracy, good reproducibility and especially by the short time in which reliable results are available. A very good correlation was found between the results obtained by the electroimmunoassay and those obtained by Laser-nephelometry. In both techniques alpha2-macroglobulin is the largest serum protein that can be determined in normal unconcentrated cerebrospinal fluid (CSF). This is of diagnostic significance, since the serum/CSF ratios of both albumin and alpha2-macroglobulin are used as a parameter for the blood-CSF barrier condition.