Results 31 to 40 of about 2,117 (179)

Sleep–wake monitoring of people with intellectual disability: Examining the agreement of EMFIT QS and actigraphy

Journal of Applied Research in Intellectual Disabilities, Volume 36, Issue 6, Page 1276-1287, November 2023., 2023
Abstract Background Gaining insight into sleep–wake patterns of persons with intellectual disabilities is commonly done using wrist actigraphy. For some people, contactless alternatives are needed. This study compares a contactless bed sensor with wrist actigraphy to monitor sleep–wake patterns of people with moderate to profound intellectual ...
Hendrik P. Buimer, Nienke M. Siebelink, Annemarije Gaasterland, Kirstin van Dam, Annelies Smits, Kyra Frederiks, Agnes van der Poel   +6 more
wiley   +1 more source

Performance Evaluation of a Smart Bed Technology against Polysomnography

Sensors, 2022
The Sleep Number smart bed uses embedded ballistocardiography, together with network connectivity, signal processing, and machine learning, to detect heart rate (HR), breathing rate (BR), and sleep vs. wake states. This study evaluated the performance of
Farzad Siyahjani, Gary Garcia Molina, Shawn Barr, Faisal Mushtaq   +3 more
doaj   +1 more source

On‐Desk Model‐Based Study for Evaluating the Effect of Squeezing the Arteries in the Forearm on the Bioimpedance and Pressure of Blood

Journal of Sensors, Volume 2023, Issue 1, 2023., 2023
Background. Today, central aortic pressure (CAP) is measured through the invasive procedure of angiography. The only feasible alternative is applanation tonometry, requiring experienced staff to perform reliable measurements. The method of measuring the electrical bioimpedance (EBI) from the wrist gives promising results in estimating the CAP. However,
Margus Metshein, Paul Annus, Raul Land, Marek Rist, Mart Min, Kristina Lotamõis, Olev Märtens, Sangsoon Lim   +7 more
wiley   +1 more source

Vision-Based Measurement of Heart Rate from Ballistocardiographic Head Movements Using Unsupervised Clustering

Sensors, 2019
Heart rate has been measured comfortably using a camera without the skin-contact by the development of vision-based measurement. Despite the potential of the vision-based measurement, it has still presented limited ability due to the noise of ...
Hyunwoo Lee, Ayoung Cho, Seongwon Lee, Mincheol Whang   +3 more
doaj   +1 more source

Cardiovascular function and ballistocardiogram: a relationship interpreted via mathematical modeling [PDF]

, 2019
Objective: to develop quantitative methods for the clinical interpretation of the ballistocardiogram (BCG). Methods: a closed-loop mathematical model of the cardiovascular system is proposed to theoretically simulate the mechanisms generating the BCG ...
Despins, Laurel, Enayati, Moein, Guidoboni, Giovanna, Huxley, Virginia H., Keller, James, Popescu, Mihail, Sacco, Riccardo, Sala, Lorenzo, Skubic, Marjorie, Szopos, Marcela   +9 more
core   +2 more sources

Sleep monitoring challenges in patients with neurocognitive disorders: A cross‐sectional analysis of missing data from activity trackers

Health Science Reports, Volume 5, Issue 3, May 2022., 2022
Abstract Background and Aims Activity monitors, such as Fitbits®, are being used increasingly for research purposes and data have been validated in healthy community‐dwelling older adults. Given the lack of research in older adults with neurocognitive disorders, we investigated the consistency of sleep data recorded from a wrist‐worn activity monitor ...
Manan Ahuja, Shailee Siddhpuria, Christina Reppas‐Rindlisbacher, Eric Wong, Jessica Gormley, Justin Lee, Christopher Patterson   +6 more
wiley   +1 more source

Assessment of Ultra-Short Heart Variability Indices Derived by Smartphone Accelerometers for Stress Detection

Sensors, 2019
Body acceleration due to heartbeat-induced reaction forces can be measured as mobile phone accelerometer (m-ACC) signals. Our aim was to test the feasibility of using m-ACC to detect changes induced by stress by ultra-short heart rate variability (USV ...
Federica Landreani, Andrea Faini, Alba Martin-Yebra, Mattia Morri, Gianfranco Parati, Enrico Gianluca Caiani   +5 more
doaj   +1 more source

Monitoring of hemodynamic changes depending on the physical load - case study [PDF]

, 2015
The paper presents partial results of the research: Changes of Hemodynamics Indicated through Noninvasive Laboratory Method of Recording of Cardiovascular System in Dependence on Physical Strain during Studies of Students of Physical Education.
Milova, Jana
core   +2 more sources

Combining Photoplethysmography and Ballistocardiography to Address Voluntary Head Movements in Heart Rate Monitoring

IEEE Access, 2020
Daily vital signs monitoring is very important for detecting diseases in early stages and for preventive treatments. Such a task can be achieved by taking advantage of the omnipresence of cameras in people's personal space.
Jean-Pierre Lomaliza, Hanhoon Park, Mark Billinghurst   +2 more
doaj   +1 more source

Vital sign monitoring and cardiac triggering at 1.5 Tesla: A practical solution by an MR-ballistocardiography fiber-optic sensor [PDF]

, 2019
This article presents a solution for continuous monitoring of both respiratory rate (RR) and heart rate (HR) inside Magnetic Resonance Imaging (MRI) environments by a novel ballistocardiography (BCG) fiber-optic sensor.
Fajkus, Marcel, Martinek, Radek, Nazeran, Homer, Nedoma, Jan   +3 more
core   +1 more source