In-bed vital signs monitoring system based on unobtrusive magnetic induction method with a concentric planar gradiometer

Mahdavi, Hadiseh; Rosell, J.

doi:10.1088/1361-6579/aa6a09

Cited by 17 publications

(4 citation statements)

References 31 publications

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“…The idea of measuring AC magnetic fields using induction coils was applied by Mahdavi and Rosell-Ferrer to measure the vital signs of a sleeping patient [170]. The system was placed under the mattress to avoid disturbing the patient and could measure their breathing and cardiac activity, using two foils for excitation and detection.…”

Section: Other Magnetic Effects and Sensors For Health Monitoringmentioning

confidence: 99%

Magnetic Micro and Nano Sensors for Continuous Health Monitoring

Blachowicz,

Kola,

Ehrmann

et al. 2024

Micro

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Magnetic micro and nano sensors can be used in a broad variety of applications, e.g., for navigation, automotives, smartphones and also for health monitoring. Based on physical effects such as the well-known magnetic induction, the Hall effect, tunnel magnetoresistance and giant magnetoresistance, they can be used to measure positions, flow, pressure and other physical properties. In biomedicine and healthcare, these miniaturized sensors can be either integrated into garments and other wearables, be directed through the body by passive capsules or active micro-robots or be implanted, which usually necessitates bio-functionalization and avoiding cell-toxic materials. This review describes the physical effects that can be applied in these sensors and discusses the most recent micro and nano sensors developed for healthcare applications.

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Section: Other Magnetic Effects and Sensors For Health Monitoringmentioning

confidence: 99%

Magnetic Micro and Nano Sensors for Continuous Health Monitoring

Blachowicz,

Kola,

Ehrmann

et al. 2024

Micro

View full text Add to dashboard Cite

show abstract

“…Conversely, the feasibility of measuring to measure signals through clothes in a non-contact way has also been investigated: the gathering of heart-related information has proven more challenging, specifically due to interference from stronger noises compared to those from the chest impedance change [ 103 ], [ 104 ]. The second method, the magnetic impedance method uses: a magnetic field generated from coils close to the chest to measure the induced eddy current, which is regulated by chest impedance and thus contains cardiorespiratory information [ 105 ]. Because the coils can be placed a few centimeters away from the chest, this second method is more commonly used than the first in unobtrusive monitoring.…”

Section: Unobtrusive Monitoring Technologymentioning

confidence: 99%

A review of wearable and unobtrusive sensing technologies for chronic disease management

Guo

Liu

Peng

et al. 2021

Computers in Biology and Medicine

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“…Therefore, MIT has advantages in monitoring intracranial injury. Further, compared with current medical imaging technology, MIT is a new technology that has not been applied in a clinical setting to date, which would provide non-contact real-time dynamic detection (Mahdavi & Rosell-Ferrer, 2017;Xiang et al, 2020), ensuring safety and convenience in future medical applications. The unique advantages of MIT make it promising for early detection of TBI.…”

Section: Introductionmentioning

confidence: 99%

Real-time imaging of traumatic brain injury using magnetic induction tomography

et al. 2023

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Objective: Early diagnosis of traumatic brain injury (TBI) is crucial for its prognosis; however, traditional computed tomography (CT) diagnostic methods rely on large medical devices with an associated lag time to receive results. Therefore, an imaging modality is needed that provides real-time monitoring, can easily be carried out to assess the extent of TBI damage, and thus guides treatment. Approach: In the present study, an improved magnetic induction tomography (MIT) data acquisition system was used to monitor TBI in an animal model and distinguish the injury level. A pneumatically controlled cortical impactor was used to strike the parietal lobe of anesthetized rabbits two or three times under the same parameter mode to establish two different rabbit models of TBI. The MIT data acquisition system was used to record data and continuously monitor the brain for one hour without intervention. Main results: A target with increased conductivity was clearly observed in the reconstructed image. The position was relatively fixed and accurate, and the average positioning error of the image was 0.01372 m. The normalized mean reconstruction value of all images increased with time. The slope of the regression line of the normalized mean reconstruction value differed significantly between the two models (p<0.0001). Significance: This indicates that in the animal model, the unique features of MIT may facilitate the early monitoring of TBI and distinguish different degrees of injuries, thereby reducing the risk and mortality of associated complications.

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In-bed vital signs monitoring system based on unobtrusive magnetic induction method with a concentric planar gradiometer

Abstract: Experimental results confirm the suitability and safety of the sensor for long-term cardiac and respiratory monitoring. The system is able to detect respiration and cardiac activity as well as the presence on the bed and changes in position.

Cited by 17 publications

References 31 publications

Magnetic Micro and Nano Sensors for Continuous Health Monitoring

Magnetic Micro and Nano Sensors for Continuous Health Monitoring

A review of wearable and unobtrusive sensing technologies for chronic disease management

Real-time imaging of traumatic brain injury using magnetic induction tomography

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