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Assessment of cerebral oxygenation response to hemodialysis using near-infrared spectroscopy (NIRS):Challenges and solutions

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Journal of Innovative Optical Health Sciences 2021年第6期4卷 55-70页

作者： Ardy Wong Lucy Robinson Seena Soroush Aditi Suresh Dia Yang Kelechi Madu Meera N.Harhay kambiz pourrezaei Drexel University School of Bioengineering Philadelphia Pennsylvania Department of Epidemiology&Biostatistics Drexel University Dornsife School of Public Health Philadelphia Pennsylvania Drexel University College of Arts and Sciences Philadelphia Pennsylvania Department of Medicine Drexel University College of Medicine Philadelphia Pennsylvania Tower Health Transplant Institute Tower Health System West Reading Pennsylvania

To date,the clinical use of functional near-infrared spectroscopy(NIRS)to detect cerebral ischemia has been largely limited to surgical settings,where motion artifacts are *** this study,we present novel techniques to address the challenges of using NIRS to monitor ambu-latory patients with kidney disease during approximately eight hours of hemodialysis(HD)*** with end-stage kidney disease who require HD are at higher risk for cognitive impairment and dementia than age-matched *** studies have suggested that HD-related declines in cerebral blood flow might explain some of the adverse outcomes of HD ***,there are currently no established paradigms for monitoring cerebral per-fusion in real-time during HD *** this study,we used NIRS to assess cerebral hemo-dynamic responses among 95 prevalent HD patients during two consecutive HD *** observed substantial signal attenuation in our predominantly Black patient cohort that required probe *** also observed consistent motion artifacts that we addressed by devel-oping a novel NIRS methodology,called the HD cerebral oxygen demand algorithm(HD-CODA),to identify episodes when cerebral oxygen demand might be outpacing supply during HD *** then examined the association between a summary measure of time spent in cerebral deoxygenation,derived using the HD-CODA,and hemodynamic and treatment-related *** found that this summary measure was associated with intradialytic mean arterial pressure,heart rate,and volume *** studies should use the HD-CODA to implement studies of real-time NIRS monitoring for incident dialysis patients,over longer time frames,and in other dialysis modalities.

关键词： Motion artifact removal cerebral oxygenation end-stage kidney disease near-infrared spectroscopy

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THE EVOLUTION OF FIELD DEPLOYABLE fNIR SPECTROSCOPY FROM BENCH TO CLINICAL SETTINGS

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Journal of Innovative Optical Health Sciences 2011年第3期4卷 239-250页

作者： KURTULUS IZZETOGLU HASAN AYAZ ANNA MERZAGORA MELTEM IZZETOGLU PATRICIA ASHEWOKIS SCOTT CBUNCE kambiz pourrezaei ARYE ROSEN BANU ONARAL School of Biomedical Engineering Science&Health Systems 3141 Chestnut Street PhiladelphiaPA 19104USA College of Nursing and Health Professions Drexel University PhiladelphiaPAUSA Center for Emerging Neurotechnology and Imaging&Department of Psychiatry Penn State College of Medicine HersheyPAUSA

In the late 1980s and early 1990s,*** Chance and his colleagues,using picosecond-long laser pulses,spearheaded the development of time-resolved spectroscopy techniques in an effort to obtain quantitative information about the optical characteristics of the *** efforts by Chance and colleagues expedited the translation of near-infrared spectroscopy(NIRS)-based techniques into a neuroimaging modality for various cognitive *** in the early 2000s,*** Chance guided and steered the collaboration with the Optical Brain Imaging team at Drexel University toward the development and application of afield deployable continuous wave functional near-infrared spectroscopy(fNIR)system as a means to monitor cognitive functions,particularly during attention and working memory tasks as well as for complex tasks such as war games and air tra±c control scenarios performed by healthy volunteers under operational ***,these collaborative efforts led to various clinical applications,including traumatic brain injury,depth of anesthesia monitoring,pediatric pain assessment,and braincomputer interface in *** this paper,we introduce how these collaborative studies have made fNIR an excellent candidate for specified clinical and research applications,including repeated cortical neuroimaging,bedside or home monitoring,the elicitation of a positive effect,and protocols requiring ecological *** paper represents a token of our gratitude to *** Chance for his influence and *** this manuscript we show our appreciation by contributing to his commemoration and through our work we will strive to advance thefield of optical brain imaging and promote his legacy.

关键词： Functional near-infrared spectroscopy fNIR TBI anesthesia BCI pediatric pain

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