Search results for " Respiratory rate"

showing 6 items of 6 documents

Instantaneous transfer entropy for the study of cardio-respiratory dynamics

2015

Measures of transfer entropy have been proposed to quantify the directional coupling and strength between two complex physiological variables. Particular attention has been given to nonlinear interactions within cardiovascular and respiratory dynamics as influenced by the autonomic nervous system. However, standard transfer entropy estimates have shown major limitations in dealing with issues concerning stochastic system modeling, limited observations in time, and the assumption of stationarity of the considered physiological variables. Moreover, standard estimates are unable to track time-varying changes in nonlinear coupling with high resolution in time. Here, we propose a novel definitio…

AdultMaleInformation transferComputer scienceEntropyPostureBiomedical EngineeringProbability density functionHealth InformaticsMaximum entropy spectral estimationNonlinear DynamicEntropy (classical thermodynamics)ElectrocardiographyTheoreticalRespiratory RateControl theoryModelsHeart RateTilt-Table TestEntropy (information theory)Humans1707; Signal Processing; Biomedical Engineering; Health InformaticsStatistical physicsEntropy (energy dispersal)Entropy (arrow of time)1707Likelihood FunctionsEntropy (statistical thermodynamics)Models TheoreticalLikelihood FunctionNonlinear systemDiscrete time and continuous timeNonlinear DynamicsSignal ProcessingSettore ING-INF/06 - Bioingegneria Elettronica E InformaticaTransfer entropyFemaleAdult; Electrocardiography; Entropy; Female; Heart Rate; Humans; Likelihood Functions; Male; Models Theoretical; Nonlinear Dynamics; Posture; Tilt-Table Test; Respiratory Rate; Signal Processing; Biomedical Engineering; 1707; Health InformaticsEntropy (order and disorder)Human
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Volatile organic compounds fingerprint of Alzheimer’s disease.

2015

Alzheimer's disease (AD) is a profoundly life changing condition and once diagnosis occurs, this is typically at a relatively late stage into the disease process. Therefore, a shift to earlier diagnosis, which means several decades before the onset of the typical manifestation of the disease, will be an important step forward for the patient. A promising diagnostic and screening tool to answer this purpose is represented by breath and exhaled volatile organic compounds (VOCs) analysis. In fact, human exhaled breath contains several thousand of VOCs that vary in abundance and number in correlation with the physiological status. The exhaled VOCs reflect the metabolism, including the neuronal …

AdultPulmonary and Respiratory MedicinePathologymedicine.medical_specialtyTime FactorsPhysiologyDiseaseVolatile organic compounds (VOCs)Neurodegenerative diseaseAlzheimer's disease; Breath analysis; Neurodegenerative disease; VOC fingerprint; VOC real time analysis; Volatile organic compounds (VOCs); Adult; Aged; Aged 80 and over; Alzheimer Disease; Biomarkers; Breath Tests; Humans; Middle Aged; Respiratory Rate; Time Factors; Volatile Organic Compounds; Young Adult; Neuroscience (all); Physiology; Pulmonary and Respiratory MedicineYoung AdultRespiratory RateAlzheimer DiseaseVOC fingerprintmedicine80 and overHumansDisease processScreening toolAgedAged 80 and overVolatile Organic CompoundsNeuroscience (all)ChemistryGeneral NeuroscienceLate stageBreath analysisAlzheimer's diseaseMiddle AgedAlzheimer's disease; Breath analysis; Neurodegenerative disease; VOC fingerprint; VOC real time analysis; Volatile organic compounds (VOCs)Breath gas analysisBreath TestsImmunologyVOC real time analysisBiomarkers
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Incidence, risk factors, and thrombotic load of pulmonary embolism in patients hospitalized for COVID-19 infection

2021

Summary Objective To determine the incidence, characteristics, and risk factors of pulmonary embolism (PE) among patients hospitalized for COVID-19. Patients and Methods We performed a prospective observational study of a randomly selected cohort of consecutive patients hospitalized for COVID-19 infection between March 8, 2020 through April 25, 2020. All eligible patients underwent a computed tomography pulmonary angiography independently of their PE clinical suspicion and were pre-screened for a baseline elevated D-dimer level. Results 119 patients were randomly selected from the 372 admitted to one tertiary hospital in Valencia (Spain) for COVID-19 infection during the period of study. Se…

Male0301 basic medicineCTPA Computed tomography pulmonary angiographyAUC-ROC Area under curve ROCPCR polymerase chain reaction0302 clinical medicineRisk FactorsspO2 Oxygen saturationIL6 Interleukin-6Pulmonary angiographySD Standard deviationMedicineProspective Studies030212 general & internal medicineProspective cohort studyComputed tomographyFramingham Risk ScoreIncidenceIncidence (epidemiology)RV Right ventricleHazard ratioVenous ThromboembolismMiddle AgedAo Aortic arteryPulmonary embolismCXR chest X-rayHospitalizationInfectious DiseasesCohortCRP C-reactive proteinFemalePA Pulmonary artery trunkMicrobiology (medical)medicine.medical_specialty030106 microbiologysPESI Simplified Pulmonary Embolism Severity IndexBMI Body mass indexPE Pulmonary embolismLV Left ventricleVTE Venous thromboembolismFibrin Fibrinogen Degradation Products03 medical and health sciencesInternal medicineHumansICU Intensive care unitsACE2 Angiotensin converting enzyme-2AgedInflammationLDH Lactate dehydrogenaseSARS-CoV-2 Severe acute respiratory syndrome coronavirus 2CI Confidence intervalbusiness.industryPulmonary embolismCOVID-19AnticoagulantsThrombosisRR Respiratory ratemedicine.diseaseConfidence intervalCHOD CRP concentration + Heart rate + Oxygen saturation + D-dimer levelsSpainHR Hazard RatioCommentarybusinessJournal of Infection
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Influence of respiratory rate and end-expiratory pressure variation on cyclic alveolar recruitment in an experimental lung injury model

2012

Introduction Cyclic alveolar recruitment/derecruitment (R/D) is an important mechanism of ventilator-associated lung injury. In experimental models this process can be measured with high temporal resolution by detection of respiratory-dependent oscillations of the paO2 (ΔpaO2). A previous study showed that end-expiratory collapse can be prevented by an increased respiratory rate in saline-lavaged rabbits. The current study compares the effects of increased positive end-expiratory pressure (PEEP) versus an individually titrated respiratory rate (RRind) on intra-tidal amplitude of Δ paO2 and on average paO2 in saline-lavaged pigs. Methods Acute lung injury was induced by bronchoalveolar lavag…

Time FactorsRespiratory rateSwinePilot ProjectsLung injuryCritical Care and Intensive Care MedicinePositive-Pressure RespirationRandom AllocationRespiratory Ratevarying shunt fractionsAnimalsMedicineddc:610porcine modelcyclic alveolar recruitmentbusiness.industryResearchLung Injuryrespiratory systemrespiratory- dependent paO 2 oscillationsrespiratory tract diseasesPulmonary AlveoliDisease Models Animalacute lung injuryAnesthesiaHigh temporal resolutionIncreased respiratory ratebusinesscirculatory and respiratory physiologyCritical Care
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High aerobic growth with low respiratory rate: The ndh-deficient Zymomonas mobilis

2007

biologyChemistryAerobic growthLow respiratory rateBioengineeringGeneral Medicinebiology.organism_classificationApplied Microbiology and BiotechnologyZymomonas mobilisBiotechnologyMicrobiologyJournal of Biotechnology
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Effect of high-flow nasal therapy on dyspnea, comfort, and respiratory rate

2019

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medicine.medical_specialtyLetteracute respiratory failureRespiratory ratebusiness.industryMEDLINElcsh:Medical emergencies. Critical care. Intensive care. First aidOxygen Inhalation Therapylcsh:RC86-88.9high flow nasal therapyCritical Care and Intensive Care MedicineCannula Dyspnea Humans Oxygen Inhalation Therapy Patient Comfort Respiratory RateDyspneaRespiratory RateEmergency medicineNIVmedicineCannulaHumansAcute respiratory failurePatient ComfortCOTHigh flowbusiness
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