From the global enddiastolic volume GEDV and the global ejection fraction GEF the patient monitor determines a corrected global enddiastolic volume cGEDV according to cGEDV=GEDVf which is used as a novel paramater for volume responsiveness of the patient. A magnetic layer is formed over the dielectric layer. The gateway server then transmits the request to the web server using a second protocol that is compatible with that used by the web server.