Results 51 to 60 of about 634,594 (289)

Verification and first test measurement of a microwave-based vital sign monitor [PDF]

open access: yesAdvances in Radio Science, 2019
The authors present a microwave-based vital sign monitoring system to detect the breathing rate of premature infants in a baby incubator. The sensor is a four channel I/Q-radar system with adapted antennas to cover the predefined region of interest on ...
D. Schmiech, A. Marnach, A. R. Diewald
doaj   +1 more source

Airway obstruction during periodic breathing in premature infants

open access: yes, 1988
To characterize changes in pulmonary resistance, timing, and respiratory drive during periodic breathing, we studied 10 healthy preterm infants (body wt 1,340 +/- 240 g, postconceptional age 35 +/- 2 wk).
W. A. Carlo   +3 more
core   +1 more source

Boundary‐Dependent Sleep–Wake Dysregulation in Idiopathic Hypersomnia

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Idiopathic hypersomnia (IH) presents with excessive daytime sleepiness (EDS) despite apparently preserved nocturnal sleep, challenging traditional models of hypersomnolence based on sleep loss or fragmentation. We aimed to test the hypothesis that EDS in IH reflects excessive stabilization of the sleep state, consistent with ...
Samantha Mombelli   +13 more
wiley   +1 more source

Monitoring mandibular movements to detect Cheyne-Stokes Breathing

open access: yesRespiratory Research, 2017
Background The patterns of mandibular movements (MM) during sleep can be used to identify increased respiratory effort periodic large-amplitude MM (LPM), and cortical arousals associated with “sharp” large-amplitude MM (SPM).
Jean-Benoît Martinot   +7 more
doaj   +1 more source

A signal demodulation-based method for the early detection of Cheyne-Stokes respiration.

open access: yesPLoS ONE, 2020
Cheyne-Stokes respiration (CSR) is a sleep-disordered breathing characterized by recurrent central apneas alternating with hyperventilation exhibiting a crescendo-decrescendo pattern of tidal volume.
Pauline Guyot   +3 more
doaj   +1 more source

A Wearable Device for Breathing Frequency Monitoring: A Pilot Study on Patients with Muscular Dystrophy

open access: yesSensors, 2020
Patients at risk of developing respiratory dysfunctions, such as patients with severe forms of muscular dystrophy, need a careful respiratory assessment, and periodic follow-up visits to monitor the progression of the disease.
Ambra Cesareo   +5 more
doaj   +1 more source

Computational Methods for Periodic Systems - An Overview [PDF]

open access: yes, 2001
We present an up-to-date survey of numerical methods for the analysis and design of linear discrete-time periodic systems. The basic tool is the periodic Schur form and its variants, for which a certain form of numerical stability can be ...
IFAC Workshop on Periodic Control Systems (PSYCO 2001)   +3 more
core  

Adenosine infusion and periodic breathing during sleep

open access: yes, 1992
Intravenously administered adenosine may increase ventilation (VI) and the ventilatory response to CO2 (HCVR). Inasmuch as we have previously hypothesized that those with higher HCVR may be more prone to periodic breathing during sleep, we measured VI ...
C. W. Zwillich, K. Gleeson
core   +1 more source

Associations Between Biomarkers of Alzheimer's Disease and Sleep in Cognitively Unimpaired Older Adults

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Sleep disturbances have been implicated as a risk factor for developing Alzheimer's disease (AD), but evidence linking plasma AD biomarkers to sleep in cognitively unimpaired individuals remains limited. The present study examined associations between evening, morning, and overnight changes in plasma AD biomarkers and measures of ...
Cornelia Sauter   +5 more
wiley   +1 more source

Home - About - Disclaimer - Privacy