The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Thomas Similowski - One of the best experts on this subject based on the ideXlab platform.
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Physiological Validation of an Airborne Ultrasound Based Surface Motion Camera for a Contactless Characterization of Breathing Pattern in Humans
Frontiers in Physiology, 2019Co-Authors: Mariececile Nierat, Pierantonio Laveneziana, Bruno-pierre Dubé, Pavel Shirkovskiy, Ros-kiri Ing, Thomas SimilowskiAbstract:Characterizing the breathing pattern in naturally breathing humans brings important information on respiratory mechanics, respiratory muscle, and breathing control. However, measuring breathing modifies breathing (observer effect) through the effects of instrumentation and awareness: measuring human breathing under true ecological conditions is currently impossible. This study tested the hypothesis that non-contact vibrometry using airborne ultrasound (SONAR) could measure breathing movements in a contactless and invisible manner. Thus, first, we evaluated the validity of SONAR measurements by testing their interchangeability with pneumotachograph (PNT) measurements obtained at the same time. We also aimed at evaluating the observer effect by comparing breathing variability obtained by SONAR versus SONAR-PNT measurements. Twenty-three healthy subjects (12 men and 11 women; mean age 33 years - range: 20-54) were studied during resting breathing while sitting on a chair. Breathing activity was described in terms of ventilatory flow measured using a PNT and, either simultaneously or sequentially, with a SONAR device measuring the velocity of the surface motion of the chest wall. SONAR was focused either anteriorly on the Xiphoid Process or posteriorly on the lower part of the costal margin. Discrete ventilatory temporal and volume variables and their coefficients of variability were calculated from the flow signal (PNT) and the velocity signal (SONAR) and tested for interchangeability (Passing-Bablok regression). Tidal volume (VT) and displacement were linearly related. Breathing frequency (BF), total cycle time (TT), inspiratory time (TI), and expiratory time (TE) met interchangeability criteria. Their coefficients of variation were not statistically significantly different with PNT and SONAR-only. This was true for both the anterior and the posterior SONAR measurements. Non-contact vibrometry using airborne ultrasound is a valid tool for measuring resting breathing pattern.
Mariececile Nierat - One of the best experts on this subject based on the ideXlab platform.
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Physiological Validation of an Airborne Ultrasound Based Surface Motion Camera for a Contactless Characterization of Breathing Pattern in Humans
Frontiers in Physiology, 2019Co-Authors: Mariececile Nierat, Pierantonio Laveneziana, Bruno-pierre Dubé, Pavel Shirkovskiy, Ros-kiri Ing, Thomas SimilowskiAbstract:Characterizing the breathing pattern in naturally breathing humans brings important information on respiratory mechanics, respiratory muscle, and breathing control. However, measuring breathing modifies breathing (observer effect) through the effects of instrumentation and awareness: measuring human breathing under true ecological conditions is currently impossible. This study tested the hypothesis that non-contact vibrometry using airborne ultrasound (SONAR) could measure breathing movements in a contactless and invisible manner. Thus, first, we evaluated the validity of SONAR measurements by testing their interchangeability with pneumotachograph (PNT) measurements obtained at the same time. We also aimed at evaluating the observer effect by comparing breathing variability obtained by SONAR versus SONAR-PNT measurements. Twenty-three healthy subjects (12 men and 11 women; mean age 33 years - range: 20-54) were studied during resting breathing while sitting on a chair. Breathing activity was described in terms of ventilatory flow measured using a PNT and, either simultaneously or sequentially, with a SONAR device measuring the velocity of the surface motion of the chest wall. SONAR was focused either anteriorly on the Xiphoid Process or posteriorly on the lower part of the costal margin. Discrete ventilatory temporal and volume variables and their coefficients of variability were calculated from the flow signal (PNT) and the velocity signal (SONAR) and tested for interchangeability (Passing-Bablok regression). Tidal volume (VT) and displacement were linearly related. Breathing frequency (BF), total cycle time (TT), inspiratory time (TI), and expiratory time (TE) met interchangeability criteria. Their coefficients of variation were not statistically significantly different with PNT and SONAR-only. This was true for both the anterior and the posterior SONAR measurements. Non-contact vibrometry using airborne ultrasound is a valid tool for measuring resting breathing pattern.
Aliki Fiska - One of the best experts on this subject based on the ideXlab platform.
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a rare triple skeletal bone variation including a median cleft of the posterior arch of the atlas a sternal foramina and a bifid Xiphoid Process
Anatomy & Cell Biology, 2020Co-Authors: Gregory Tsoucalas, Anastasios Vasilopoulos, Vasilios Thomaidis, Aliki FiskaAbstract:Bone variations are usually a result of abnormal ossification during embryonic life. Separately or in combination, sternal foramina and bifid Xiphoid Process are well documented skeletal alternations, as well as the median cleft of the posterior arch of the atlas. However, their appearance in combination is not yet celebrated in the literature. Our post-mortem examination unearthed such a triple variant of an adult male skeleton, which included no other skeletal variations. The fact that all variants are depicted in the median line of ossification implies a hypothesis of a triggered midline bone defect Process. The awareness among clinicians of such variations during interventional and imaging procedures is of great importance.
Kenpen Weng - One of the best experts on this subject based on the ideXlab platform.
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secondary confirmation of endotracheal tube position by ultrasound image
Critical Care Medicine, 2004Co-Authors: Kaisheng Hsieh, Chengliang Lee, Chuchung Lin, Tacheng Huang, Kenpen WengAbstract:Objective: Secondary confirmation of endotracheal (ET) tube position by ultrasound image. Design: Prospective, randomized study. Setting: A medical center-based tertiary pediatric intensive care unit. Patients: A total of 59 patients aged from newborn to 17 yrs old underwent ET tube insertion because of cardiopulmonary arrest or impending respiratory failure. Intervention: Ultrasound imaging was performed immediately before and after the ET tube placement procedure. The most frequently used ultrasonic scanning window was the subXiphoid window at the mid-upper abdominal, just beneath the Xiphoid Process and the lower margin of liver. The sector angle was set as wide as possible (90 degrees) so that the bilateral diaphragm could be well scanned. Measurements and Main Results: Using the ultrasound imaging method, we successfully identified all of two esophageal intubations and eight incidents of initial ET tube misplacement, which had been positioned down to the right main bronchus. Finally, we successfully identified all 59 of the correct placements of ET tubes in the trachea. Conclusions: Ultrasound imaging of diaphragm motion is a useful, quick, noninvasive, portable, and direct anatomic method for assessment of ET tube position. We think it should be considered the method of choice for the secondary confirmation of the ET tube position.
Pierantonio Laveneziana - One of the best experts on this subject based on the ideXlab platform.
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Physiological Validation of an Airborne Ultrasound Based Surface Motion Camera for a Contactless Characterization of Breathing Pattern in Humans
Frontiers in Physiology, 2019Co-Authors: Mariececile Nierat, Pierantonio Laveneziana, Bruno-pierre Dubé, Pavel Shirkovskiy, Ros-kiri Ing, Thomas SimilowskiAbstract:Characterizing the breathing pattern in naturally breathing humans brings important information on respiratory mechanics, respiratory muscle, and breathing control. However, measuring breathing modifies breathing (observer effect) through the effects of instrumentation and awareness: measuring human breathing under true ecological conditions is currently impossible. This study tested the hypothesis that non-contact vibrometry using airborne ultrasound (SONAR) could measure breathing movements in a contactless and invisible manner. Thus, first, we evaluated the validity of SONAR measurements by testing their interchangeability with pneumotachograph (PNT) measurements obtained at the same time. We also aimed at evaluating the observer effect by comparing breathing variability obtained by SONAR versus SONAR-PNT measurements. Twenty-three healthy subjects (12 men and 11 women; mean age 33 years - range: 20-54) were studied during resting breathing while sitting on a chair. Breathing activity was described in terms of ventilatory flow measured using a PNT and, either simultaneously or sequentially, with a SONAR device measuring the velocity of the surface motion of the chest wall. SONAR was focused either anteriorly on the Xiphoid Process or posteriorly on the lower part of the costal margin. Discrete ventilatory temporal and volume variables and their coefficients of variability were calculated from the flow signal (PNT) and the velocity signal (SONAR) and tested for interchangeability (Passing-Bablok regression). Tidal volume (VT) and displacement were linearly related. Breathing frequency (BF), total cycle time (TT), inspiratory time (TI), and expiratory time (TE) met interchangeability criteria. Their coefficients of variation were not statistically significantly different with PNT and SONAR-only. This was true for both the anterior and the posterior SONAR measurements. Non-contact vibrometry using airborne ultrasound is a valid tool for measuring resting breathing pattern.
