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公开(公告)号：EP2571564A4
公开(公告)日：2018-04-04
申请号：EP11784265
申请日：2011-05-19
申请人： SHUNTCHECK INC
CPC分类号： A61M27/006 , A61M27/002
摘要： An apparatus capable of generating flow in cerebrospinal fluid (CSF) shunt systems by vibrating the shunt, tubing or shunt valve dome, or applying cyclical pressure to the various parts of the shunt system. A method of generating flow and method of using the apparatus in shunt patency assessment, for example, hydraulic resistance assessment, is also disclosed. The apparatus allows, in conjunction with a thermal dilution method or radionuclide method, a quick CSF shunt patency assessment based upon CSF shunt resistance and not upon CSF flow or intracranial pressure (ICP) separately. This provides a more objective measure of shunt obstruction compared to other methods. Furthermore, the apparatus can be used to enhance flow in shunts, identify partial occlusion before symptoms occur, differentiate between patent, partially-occluded and occluded shunts. The apparatus can be used to generate flow in shunts if there is a need to lower ICP or move drugs administered via an injection chamber or a shunt dome.
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公开(公告)号：EP2575934A4
公开(公告)日：2016-04-20
申请号：EP11787489
申请日：2011-05-27
申请人： SHUNTCHECK INC
CPC分类号： A61M27/006 , A61B5/01 , A61B5/031 , A61B5/032 , A61M5/168 , A61M5/16836 , G01F1/684
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3.发明公开CSF SHUNT FLOW EVALUATION APPARATUS AND METHOD USING A CONFORMABLE EXPANDED DYNAMIC RANGE THERMOSENSOR 有权CSF分流流动分析装置和方法与扩展范围的柔性热传感器
公开(公告)号：EP2928365A4
公开(公告)日：2015-10-14
申请号：EP13859630
申请日：2013-11-26
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.
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