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Therapeutic effect of long-acting muscarinic antagonist for treating uncontrolled asthma assessed using impulse oscillometry.
Respir Res
August 2024
Department of Respiratory Medicine and Allergology, Sapporo Medical University School of Medicine, S1W16 Chuoku Sapporo, Sapporo, Hokkaido, 060-8543, Japan.
Background: In recent years, the incorporation of LAMAs into asthma therapy has been expected to enhance symptom control. However, a significant number of patients with asthma continue to experience poorly managed symptoms. There have been limited investigations on LAMA-induced airway alterations in asthma treatment employing IOS.
View Article and Find Full Text PDFReference equations using segmented regressions for impulse oscillometry in healthy subjects aged 2.7-90 years.
ERJ Open Res
November 2023
Instituto Nacional de Enfermedades Respiratorias Ismael Cosío Villegas, Mexico City, Mexico.
Background: Published reference equations for impulse oscillometry (IOS) usually encompass a specific age group but not the entire lifespan. This may lead to discordant predicted values when two or more non-coincident equations can be applied to the same person, or when a person moves from one equation to the next non-convergent equation as he or she gets older. Thus, our aim was to provide a single reference equation for each IOS variable that could be applied from infancy to old age.
View Article and Find Full Text PDFPulse-wave velocity assessments derived from a simple photoplethysmography device: Agreement with a referent device.
Front Cardiovasc Med
February 2023
Department of Exercise and Sport Science, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States.
Objective: Pulse-wave velocity (PWV), a common measure of arterial stiffness, can be measured continuously and across multiple body sites using photoplethysmography (PPG). The objective was to determine whether a simple photoplethysmography PPG PWV method agrees with a referent device.
Approach: Photoplethysmography heart-finger PWV (hfPWV) and heart-toe PWV (htPWV) were compared to oscillometric carotid-wrist PWV (cwPWV) and carotid-ankle PWV (caPWV) referent measurements, respectively.
Impaired Respiratory System Resistance and Reactance Are Associated With Bronchial Wall Thickening in Persistent Asthma.
J Allergy Clin Immunol Pract
May 2023
Scottish Centre for Respiratory Research, School of Medicine, University of Dundee, Ninewells Hospital, Dundee, Scotland, United Kingdom. Electronic address:
Background: A recent study demonstrated a significant correlation between bronchial biopsy airway remodeling and quantitative computed tomography looking at bronchial wall thickness.
Objective: To identify clinical associations with bronchial wall thickness in moderate to severe asthma.
Methods: Ninety-two respiratory physician-diagnosed Global Initiative for Asthma-defined patients with moderate to severe asthma were included in this retrospective cohort study.
Automated Force-Coupled Ultrasound Method for Calibration-Free Carotid Artery Blood Pressure Estimation.
Ultrasound Med Biol
September 2022
Massachusetts Institute of Technology, Cambridge, Massachusetts, USA. Electronic address:
We develop, automate and evaluate a calibration-free technique to estimate human carotid artery blood pressure from force-coupled ultrasound images. After acquiring images and force, we use peak detection to align the raw force signal with an optical flow signal derived from the images. A trained convolutional neural network selects a seed point within the carotid in a single image.
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