US2014163404A1PendingUtilityA1
Cerebral Perfusion Monitor
Assignee: ORSAN MEDICAL TECHNOLOGIES LTDPriority: Jan 15, 2002Filed: Jul 15, 2013Published: Jun 12, 2014
Est. expiryJan 15, 2022(expired)· nominal 20-yr term from priority
A61B 5/0261A61B 5/245A61B 5/0265A61B 5/6814A61B 5/6817A61B 2562/164A61B 5/0535A61B 5/0295
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Abstract
A method of estimating cerebral blood flow by analyzing IPG and PPG signals of the head, the method comprising: a) finding a maximum slope or most negative slope or the IPG signal, within at least a portion of the cardiac cycle; b) finding a maximum slope or most negative slope of the PPG signal, within at least a portion of the cardiac cycle; c) finding a ratio of the maximum or most negative slope of the IPG signal to the maximum or most negative slope of the PPG signal; and d) calculating a cerebral blood flow indicator from the ratio.
Claims
exact text as granted — not AI-modified1 . A method of estimating cerebral blood flow by analyzing IPG and PPG signals of the head, the method comprising:
a) finding a maximum slope or most negative slope or the IPG signal, within at least a portion of the cardiac cycle; b) finding a maximum slope or most negative slope of the PPG signal, within at least a portion of the cardiac cycle; c) finding a ratio of the maximum or most negative slope of the IPG signal to the maximum or most negative slope of the PPG signal; and d) calculating a cerebral blood flow indicator from the ratio.
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