[The intrathecal infusion test in the study of craniospinal cerebrospinal fluid dynamics. A new assessment procedure].

A new mathematical method is presented for calculation of cerebrospinal fluid (CSF) parameters. Intrathecal lumbal infusion test with constant flow technique was used. Resistance to CSF outflow R(p) and compliance C(p) are computed by continuous comparing the change of pressure response dp/dt during infusion and--dp/dt after infusion.

[Instrumentation for hollow screw osteosynthesis of basal dens axis fractures].

The trend in the treatment of odontoid bone fractures is characterized by progressive application of operative methods. Special instruments for the fixation of odontoid bone was developed. Due to the ventral extraoral approach odontoid bone is possible to fix temporary with two rigid Kirschner wires by these hollow screws drilled from the ventral lower edge of the second vertebral body through the fracture in the odontoid bone.