The NIRS Cap: Key Part of Emerging Wearable Brain-Device Interfaces

Kassab, Amal

doi:10.5772/67457

Cited by 3 publications

(2 citation statements)

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“…Rated user comfort differed per individual, like data quality, and these two feasibility aspects are strongly related. There is a positive relationship between pressure on the head and data quality and most often a negative between pressure on the head and wearing comfort [39]. However, some participants in our study reported discomfort due to a tooloose fit of the bandana and sensor movement (thus low pressure).…”

Section: Feasibilitymentioning

confidence: 61%

Home-based monitoring of cerebral oxygenation in response to postural changes using near-infrared spectroscopy

Klop,

Claassen,

Floor-Westerdijk

et al. 2024

GeroScience

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Orthostatic hypotension (OH) is prevalent in older adults and can cause falls and hospitalization. Diagnostic intermittent blood pressure (BP) measurements are only a proxy for cerebral perfusion and do not reflect daily-life BP fluctuations. Near-infrared spectroscopy (NIRS)-measured cerebral oxygenation potentially overcomes these drawbacks. This study aimed to determine feasibility, face validity, and reliability of NIRS in the home environment. Ten participants with OH (2 female, mean age 77, SD 3.7) and 11 without OH (5 female, mean age 78, SD 6.7) wore a NIRS sensor at home on two different days for 10–11 h per day. Preceded by a laboratory-situated test, cerebral oxygenation was measured during three standardized supine-stand tests per day and during unsupervised daily life activities. Data availability, quality, and user experience were assessed (feasibility), as well as differences in posture-related oxygenation responses between participants with and without OH and between symptomatic (dizziness, light-headedness, blurred vision) and asymptomatic postural changes (face validity). Reliability was assessed through repetitive supine-stand tests. Up to 80% of the standardized home-based supine-stand tests could be analyzed. Oxygenation recovery values were lower for participants with OH (p = 0 .03–0.15); in those with OH, oxygenation showed a deeper maximum drop for symptomatic than asymptomatic postural changes (p = 0.04). Intra-class correlation coefficients varied from 0.07 to 0.40, with no consistent differences over measurements. This proof-of-concept study shows feasibility and face validity of at-home oxygenation monitoring using NIRS, confirming its potential value for diagnosis and monitoring in OH and OH-related symptoms. Further data are needed for conclusions about reliability.

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Section: Feasibilitymentioning

confidence: 61%

Home-based monitoring of cerebral oxygenation in response to postural changes using near-infrared spectroscopy

Klop,

Claassen,

Floor-Westerdijk

et al. 2024

GeroScience

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“…• Improve NIRS techniques: Time domain-NIRS and Frequency domain-NIRS can separate the contribution from extra-cerebral layer or cortical part [111,121]. The cap/headset may cause discomfort for long-term use A wireless EEG-fNIRS system and a proper design, even customization, of the fixation devices are needed [126,127].…”

Section: Fnirsmentioning

confidence: 99%

Trends and Challenges of Wearable Multimodal Technologies for Stroke Risk Prediction

Chen

2021

Sensors

Self Cite

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We review in this paper the wearable-based technologies intended for real-time monitoring of stroke-related physiological parameters. These measurements are undertaken to prevent death and disability due to stroke. We compare the various characteristics, such as weight, accessibility, frequency of use, data continuity, and response time of these wearables. It was found that the most user-friendly wearables can have limitations in reporting high-precision prediction outcomes. Therefore, we report also the trend of integrating these wearables into the internet of things (IoT) and combining electronic health records (EHRs) and machine learning (ML) algorithms to establish a stroke risk prediction system. Due to different characteristics, such as accessibility, time, and spatial resolution of various wearable-based technologies, strategies of applying different types of wearables to maximize the efficacy of stroke risk prediction are also reported. In addition, based on the various applications of multimodal electroencephalography–functional near-infrared spectroscopy (EEG–fNIRS) on stroke patients, the perspective of using this technique to improve the prediction performance is elaborated. Expected prediction has to be dynamically delivered with high-precision outcomes. There is a need for stroke risk stratification and management to reduce the resulting social and economic burden.

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Designing Anatomically Derived, 3-D Printable Head Caps for Functional Neuroimaging

McCann,

Xu,

Yen

et al. 2024

Optica Biophotonics Congress: Biomedical Optics 2024 (Translational, Microscopy, OCT, OTS, BRAIN)

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The NIRS Cap: Key Part of Emerging Wearable Brain-Device Interfaces

Cited by 3 publications

References 50 publications

Home-based monitoring of cerebral oxygenation in response to postural changes using near-infrared spectroscopy

Home-based monitoring of cerebral oxygenation in response to postural changes using near-infrared spectroscopy

Trends and Challenges of Wearable Multimodal Technologies for Stroke Risk Prediction

Designing Anatomically Derived, 3-D Printable Head Caps for Functional Neuroimaging

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