公开(公告)号：EP2928365A4

公开(公告)日：2015-10-14

申请号：EP13859630

申请日：2013-11-26

申请人： FRITZ FREDERICK J ,  SWOBODA MAREK ,  MATTIUCCI MARK E ,  HOCHMAN MATIAS G ,  SHUNTCHECK INC

发明人： FRITZ FREDERICK J ,  SWOBODA MAREK ,  MATTIUCCI MARK E ,  HOCHMAN MATIAS G

IPC分类号： A61B5/03 ,  A61B5/00 ,  A61B5/01 ,  A61B5/145 ,  A61B5/151 ,  A61M27/00

CPC分类号： A61B5/01 ,  A61B5/015 ,  A61B5/031 ,  A61B5/032 ,  A61B5/14507 ,  A61B5/6833 ,  A61B5/684 ,  A61B2562/0271 ,  A61B2562/043 ,  A61M27/006

摘要： An apparatus and method that utilizes thermal dilution to detect a wide range of flow rates and/or flow status in cerebrospinal fluid (CSF) shunt systems. The use of a large cold source in combination with thermosensor pad of a particular construction provide a fluid flow analyzer with the ability to detect very low levels of CSF flow. In addition, a method for adjusting thermal dilution readings to compensate for varying shunt catheter depth is shown and for determining a steady state of the thermal dilution readings. The thermosensor pad is conformable to a patient's skin contour thereby making the apparatus and method less sensitive to ambient temperature errors and, as a result, more accurate in assessing CSF flow. Furthermore, a software error check is provided for identifying poor sensor-to-skin contact for alerting an operator to re-apply the thermosensor pad to correct, as well as a post-test check to determine if temperature data is reasonable before determining flow status or flow rate.