Patent Document ID: 20080306403
Application ID: 11885137
Patent Flag: 0

Claim One:
1. Method for determining the hydrodynamic properties of the fluid system surrounding the brain and the spinal cord, the so called cerebrospinal fluid system, comprising continuous pressure measurement through a first fluid contact passage and active infusion of artificial cerebrospinal fluid through a second fluid contact passage to a number of pressure-flow levels, and analysis of the connections between the measured pressures and flows, wherein an adaptive way of procedure is used by taking account for, on each pressure-flow level, the measure time and the patient's fluctuations in physiologic signals for calculating in real time when the relation between the measure time and measure accuracy in pressure and flow on the actual pressure-flow level is sufficient, and that when said relation between measure time and measure accuracy is sufficient, the investigation or examination is automatically proceeding to the next level according to a predetermined protocol, whereby measurements with sufficient pressure and flow information at each level is obtained and constitute a basis for determining, with an uncertainty estimate, the hydrodynamic parameters of the patient.