公开(公告)号：EP4434453A1

公开(公告)日：2024-09-25

申请号：EP23214356.0

申请日：2023-12-05

申请人： St. Jude Medical, Cardiology Division, Inc.

发明人： VOTH, Eric J. ,  SCHWEITZER, Jeffrey A. ,  Ruetz, Linda L.

IPC分类号： A61B5/0538 ,  A61B5/00

CPC分类号： A61B18/1492 ,  A61B5/0538 ,  A61B5/6885 ,  A61B5/7221 ,  A61B2018/0087520130101 ,  A61B2018/0066620130101 ,  A61B2018/0035120130101 ,  A61B2018/0026720130101 ,  A61B2090/06520160201 ,  A61B2018/006620130101 ,  A61B5/6858 ,  A61B5/6886 ,  A61B5/7225 ,  A61B5/7275 ,  A61B5/7282

摘要： A method of determining a baseline impedance value for a first electrode in a plurality of electrodes located on a medical device for tissue contact detection includes measuring an impedance value of the first electrode generated in response to a drive signal to the first electrode. The method further includes assigning a baseline impedance value to the first electrode based on impedance values measured in a predetermined time interval and determining a confidence value associated with the baseline impedance value. The method further includes utilizing the baseline impedance value in determining contact status of the first electrode when the confidence value is at or above a predetermined threshold value.