Intracranial pressure driven cardiac pulsation waveform changes measured with diffuse correlation spectroscopy

2021 ◽  
Author(s):  
Syeda Tabassum ◽  
Alexander Ruesch ◽  
Deepshikha Acharya ◽  
Jaskaran Rakkar ◽  
Robert S. B. Clark ◽  
...  
Keyword(s):  
Intracranial Pressure ◽  
Correlation Spectroscopy ◽  
Diffuse Correlation Spectroscopy ◽  
Pressure Driven

Non-invasive estimation of intracranial pressure by fast diffuse correlation spectroscopy: a multi-center study

2021 ◽  
Author(s):  
Jonas B. Fischer ◽  
Susanna Tagliabue ◽  
Federica Maruccia ◽  
Amelia Jiménez-Sánchez ◽  
Eashani Sathialingam ◽  
...  
Keyword(s):  
Intracranial Pressure ◽  
Correlation Spectroscopy ◽  
Diffuse Correlation Spectroscopy ◽  
Non Invasive ◽  
Multi Center Study ◽  
Center Study

scholarly journals Estimating intracranial pressure using pulsatile cerebral blood flow measured with diffuse correlation spectroscopy

2020 ◽  
Vol 11 (3) ◽  
pp. 1462 ◽  
Author(s):  
Alexander Ruesch ◽  
Jason Yang ◽  
Samantha Schmitt ◽  
Deepshikha Acharya ◽  
Matthew A. Smith ◽  
...  
Keyword(s):  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Intracranial Pressure ◽  
Correlation Spectroscopy ◽  
Diffuse Correlation Spectroscopy

Double layer estimation of flow changes using diffuse correlation spectroscopy

2009 ◽  
Author(s):  
Louis Gagnon ◽  
Michèle Desjardins ◽  
Louis Bherer ◽  
Frédéric Lesage
Keyword(s):  
Double Layer ◽  
Correlation Spectroscopy ◽  
Diffuse Correlation Spectroscopy ◽  
Flow Changes

scholarly journals Non-invasive optical neuromonitoring of the temperature-dependence of cerebral oxygen metabolism during deep hypothermic cardiopulmonary bypass in neonatal swine

2018 ◽  
Vol 40 (1) ◽  
pp. 187-203 ◽  
Author(s):  
Tiffany S Ko ◽  
Constantine D Mavroudis ◽  
Wesley B Baker ◽  
Vincent C Morano ◽  
Kobina Mensah-Brown ◽  
...  
Keyword(s):  
Cardiac Surgery ◽  
Cardiopulmonary Bypass ◽  
Temperature Response ◽  
Oxygen Metabolism ◽  
Correlation Spectroscopy ◽  
Neurological Injury ◽  
Diffuse Correlation Spectroscopy ◽  
Non Invasive ◽  
Neuroprotective Strategy ◽  
Subject Variability

Management of deep hypothermic (DH) cardiopulmonary bypass (CPB), a critical neuroprotective strategy, currently relies on non-invasive temperature to guide cerebral metabolic suppression during complex cardiac surgery in neonates. Considerable inter-subject variability in temperature response and residual metabolism may contribute to the persisting risk for postoperative neurological injury. To characterize and mitigate this variability, we assess the sufficiency of conventional nasopharyngeal temperature (NPT) guidance, and in the process, validate combined non-invasive frequency-domain diffuse optical spectroscopy (FD-DOS) and diffuse correlation spectroscopy (DCS) for direct measurement of cerebral metabolic rate of oxygen ( CMRO2). During CPB, n = 8 neonatal swine underwent cooling from normothermia to 18℃, sustained DH perfusion for 40 min, and then rewarming to simulate cardiac surgery. Continuous non-invasive and invasive measurements of intracranial temperature (ICT) and CMRO2 were acquired. Significant hysteresis ( p < 0.001) between cooling and rewarming periods in the NPT versus ICT and NPT versus CMRO2 relationships were found. Resolution of this hysteresis in the ICT versus CMRO2 relationship identified a crucial insufficiency of conventional NPT guidance. Non-invasive CMRO2 temperature coefficients with respect to NPT ( Q10 = 2.0) and ICT ( Q10 = 2.5) are consistent with previous reports and provide further validation of FD-DOS/DCS CMRO2 monitoring during DH CPB to optimize management.

scholarly journals Investigation of diffuse correlation spectroscopy in multi-layered media including the human head

2008 ◽  
Vol 16 (20) ◽  
pp. 15514 ◽  
Author(s):  
Louis Gagnon ◽  
Michèle Desjardins ◽  
Julien Jehanne-Lacasse ◽  
Louis Bherer ◽  
Frédéric Lesage
Keyword(s):  
Layered Media ◽  
Human Head ◽  
Correlation Spectroscopy ◽  
Diffuse Correlation Spectroscopy
Sign in / Sign up

Export Citation Format

Share Document