The Experts below are selected from a list of 123 Experts worldwide ranked by ideXlab platform
Navalesi P. - One of the best experts on this subject based on the ideXlab platform.
-
High-Flow Oxygen Therapy After Noninvasive Ventilation Interruption in Patients Recovering From Hypercapnic Acute Respiratory Failure: A Physiological Crossover Trial
2019Co-Authors: Longhini F., Pisani L., Lungu R., Bruni A., Garofalo E., Laura Vega M., Cammarota G., Nava S., Navalesi P.Abstract:OBJECTIVES: Assessing gas exchange, Diaphragm function, respiratory rate, and patient comfort during high-flow oxygen therapy and standard oxygen at the time of noninvasive ventilation discontinuation. DESIGN: Randomized crossover physiologic study.Two ICUs. PATIENTS: Thirty chronic obstructive pulmonary disease patients with hypercapnic acute respiratory failure receiving noninvasive ventilation greater than 24 hours. INTERVENTIONS: All patients underwent five 30-minute trials, the first, third, and fifth trial in noninvasive ventilation, whereas the second and fourth were randomly conducted with either standard oxygen and high-flow oxygen therapy. MEASUREMENTS AND MAIN RESULTS: Diaphragm Displacement and thickening fraction were determined by sonographic evaluation at the end of each trial. Arterial blood gases, respiratory rate, and patient comfort were also assessed. PaCO2 (p = 0.153) and pH (p = 0.114) were not different among trials, while PaO2 was greater in noninvasive ventilation than with both standard oxygen (p ≤ 0.005) and high-flow oxygen therapy (p ≤ 0.001). The Diaphragm Displacement was no different among trials (p = 0.875), while its thickening fraction was greater with standard oxygen, compared with high-flow oxygen therapy and all noninvasive ventilation trials (p < 0.001 for all comparisons), without differences between high-flow oxygen therapy and noninvasive ventilation. Respiratory rate also increased with standard oxygen, compared with both high-flow oxygen therapy (p < 0.001) and noninvasive ventilation (p < 0.01). High-flow oxygen therapy improved comfort, compared with standard oxygen (p = 0.004) and noninvasive ventilation (p < 0.001). CONCLUSIONS: At the time of noninvasive ventilation interruption, PaCO2 and Diaphragm Displacement remained unchanged regardless of the modality of oxygen administration. However, although standard oxygen resulted in a remarkable increase in Diaphragm thickening fraction, high-flow oxygen therapy allowed maintaining it unchanged, while improving patient comfort
-
High-Flow Oxygen Therapy After Noninvasive Ventilation Interruption in Patients Recovering From Hypercapnic Acute Respiratory Failure: A Physiological Crossover Trial
'Ovid Technologies (Wolters Kluwer Health)', 2019Co-Authors: Longhini F., Pisani L., Lungu R., Garofalo E., Cammarota G., Nava S., Fruni A, Ml Vega, Navalesi P.Abstract:Objectives: Assessing gas exchange, Diaphragm function, respiratory rate, and patient comfort during high-flow oxygen therapy and standard oxygen at the time of noninvasive ventilation discontinuation. Design: Randomized crossover physiologic study. Setting: Two ICUs. Patients: Thirty chronic obstructive pulmonary disease patients with hypercapnic acute respiratory failure receiving noninvasive ventilation greater than 24 hours. Interventions: All patients underwent five 30-minute trials, the first, third, and fifth trial in noninvasive ventilation, whereas the second and fourth were randomly conducted with either standard oxygen and high-flow oxygen therapy. Measurements and Main Results: Diaphragm Displacement and thickening fraction were determined by sonographic evaluation at the end of each trial. Arterial blood gases, respiratory rate, and patient comfort were also assessed. Paco(2) (p = 0.153) and pH (p = 0.114) were not different among trials, while Pao(2) was greater in noninvasive ventilation than with both standard oxygen (p
Shizuo Tokito - One of the best experts on this subject based on the ideXlab platform.
-
a push mode piezo inkjet equivalent circuit model enhanced by Diaphragm Displacement measurements
AIP Advances, 2019Co-Authors: Yasunori Yoshida, Konami Izumi, Shizuo TokitoAbstract:This paper reports on ways to better predict droplet ejection velocity of push-mode piezo inkjet technology by upgrading the conventional equivalent circuit model. Calculation results from the traditional model imply that the driving pulse width conditions without ink ejection only periodically exist in the pull-push piezo driving mode. However, ink ejection is actually observed under any pulse width condition. The Displacement of the Diaphragm with respect to the piezo element input voltage waveform was measured with a highly accurate capacitive Displacement gauge to correct for the difference between the actual measurements and calculations. The equivalent circuit model was then modified so that the measured Diaphragm residual oscillations could be expressed. We presumed that an actual inkjet printhead contains an effective spring oscillation component, effective actuator mass, and damping component larger than that used in conventional equivalent circuit model calculations. We demonstrated that the difference between the calculated results and actual measurements could be reduced. Modifications to equivalent circuit model are based on the addition of an effective mechanical spring oscillation component having the same function as the ink chamber compliance, an increase in actuator inertance corresponding to the mass of the actuator, and an effective resistance element expressing a damped oscillation.This paper reports on ways to better predict droplet ejection velocity of push-mode piezo inkjet technology by upgrading the conventional equivalent circuit model. Calculation results from the traditional model imply that the driving pulse width conditions without ink ejection only periodically exist in the pull-push piezo driving mode. However, ink ejection is actually observed under any pulse width condition. The Displacement of the Diaphragm with respect to the piezo element input voltage waveform was measured with a highly accurate capacitive Displacement gauge to correct for the difference between the actual measurements and calculations. The equivalent circuit model was then modified so that the measured Diaphragm residual oscillations could be expressed. We presumed that an actual inkjet printhead contains an effective spring oscillation component, effective actuator mass, and damping component larger than that used in conventional equivalent circuit model calculations. We demonstrated that the dif...
-
A push-mode piezo inkjet equivalent circuit model enhanced by Diaphragm Displacement measurements
AIP Publishing LLC, 2019Co-Authors: Yasunori Yoshida, Konami Izumi, Shizuo TokitoAbstract:This paper reports on ways to better predict droplet ejection velocity of push-mode piezo inkjet technology by upgrading the conventional equivalent circuit model. Calculation results from the traditional model imply that the driving pulse width conditions without ink ejection only periodically exist in the pull-push piezo driving mode. However, ink ejection is actually observed under any pulse width condition. The Displacement of the Diaphragm with respect to the piezo element input voltage waveform was measured with a highly accurate capacitive Displacement gauge to correct for the difference between the actual measurements and calculations. The equivalent circuit model was then modified so that the measured Diaphragm residual oscillations could be expressed. We presumed that an actual inkjet printhead contains an effective spring oscillation component, effective actuator mass, and damping component larger than that used in conventional equivalent circuit model calculations. We demonstrated that the difference between the calculated results and actual measurements could be reduced. Modifications to equivalent circuit model are based on the addition of an effective mechanical spring oscillation component having the same function as the ink chamber compliance, an increase in actuator inertance corresponding to the mass of the actuator, and an effective resistance element expressing a damped oscillation
Garofalo E. - One of the best experts on this subject based on the ideXlab platform.
-
High-Flow Oxygen Therapy After Noninvasive Ventilation Interruption in Patients Recovering From Hypercapnic Acute Respiratory Failure: A Physiological Crossover Trial
2019Co-Authors: Longhini F., Pisani L., Lungu R., Bruni A., Garofalo E., Laura Vega M., Cammarota G., Nava S., Navalesi P.Abstract:OBJECTIVES: Assessing gas exchange, Diaphragm function, respiratory rate, and patient comfort during high-flow oxygen therapy and standard oxygen at the time of noninvasive ventilation discontinuation. DESIGN: Randomized crossover physiologic study.Two ICUs. PATIENTS: Thirty chronic obstructive pulmonary disease patients with hypercapnic acute respiratory failure receiving noninvasive ventilation greater than 24 hours. INTERVENTIONS: All patients underwent five 30-minute trials, the first, third, and fifth trial in noninvasive ventilation, whereas the second and fourth were randomly conducted with either standard oxygen and high-flow oxygen therapy. MEASUREMENTS AND MAIN RESULTS: Diaphragm Displacement and thickening fraction were determined by sonographic evaluation at the end of each trial. Arterial blood gases, respiratory rate, and patient comfort were also assessed. PaCO2 (p = 0.153) and pH (p = 0.114) were not different among trials, while PaO2 was greater in noninvasive ventilation than with both standard oxygen (p ≤ 0.005) and high-flow oxygen therapy (p ≤ 0.001). The Diaphragm Displacement was no different among trials (p = 0.875), while its thickening fraction was greater with standard oxygen, compared with high-flow oxygen therapy and all noninvasive ventilation trials (p < 0.001 for all comparisons), without differences between high-flow oxygen therapy and noninvasive ventilation. Respiratory rate also increased with standard oxygen, compared with both high-flow oxygen therapy (p < 0.001) and noninvasive ventilation (p < 0.01). High-flow oxygen therapy improved comfort, compared with standard oxygen (p = 0.004) and noninvasive ventilation (p < 0.001). CONCLUSIONS: At the time of noninvasive ventilation interruption, PaCO2 and Diaphragm Displacement remained unchanged regardless of the modality of oxygen administration. However, although standard oxygen resulted in a remarkable increase in Diaphragm thickening fraction, high-flow oxygen therapy allowed maintaining it unchanged, while improving patient comfort
-
High-Flow Oxygen Therapy After Noninvasive Ventilation Interruption in Patients Recovering From Hypercapnic Acute Respiratory Failure: A Physiological Crossover Trial
'Ovid Technologies (Wolters Kluwer Health)', 2019Co-Authors: Longhini F., Pisani L., Lungu R., Garofalo E., Cammarota G., Nava S., Fruni A, Ml Vega, Navalesi P.Abstract:Objectives: Assessing gas exchange, Diaphragm function, respiratory rate, and patient comfort during high-flow oxygen therapy and standard oxygen at the time of noninvasive ventilation discontinuation. Design: Randomized crossover physiologic study. Setting: Two ICUs. Patients: Thirty chronic obstructive pulmonary disease patients with hypercapnic acute respiratory failure receiving noninvasive ventilation greater than 24 hours. Interventions: All patients underwent five 30-minute trials, the first, third, and fifth trial in noninvasive ventilation, whereas the second and fourth were randomly conducted with either standard oxygen and high-flow oxygen therapy. Measurements and Main Results: Diaphragm Displacement and thickening fraction were determined by sonographic evaluation at the end of each trial. Arterial blood gases, respiratory rate, and patient comfort were also assessed. Paco(2) (p = 0.153) and pH (p = 0.114) were not different among trials, while Pao(2) was greater in noninvasive ventilation than with both standard oxygen (p
-
Comparisons of two Diaphragm ultrasound-teaching programs: a multicenter randomized controlled educational study
'Springer Science and Business Media LLC', 2019Co-Authors: Garofalo E., Bruni A., Pelaia C., Landoni G., Zangrillo A., Antonelli M., Conti G., Biasucci D. G., Mercurio G., Cortegiani A.Abstract:Background: This study aims to ascertain whether (1) an educational program is sufficient to achieve adequate Diaphragm Ultrasound (DUS) assessments on healthy volunteers and (2) combining a video tutorial with a practical session is more effective in making learners capable to obtain accurate DUS measurements, as opposed to sole video tutorial. Results: We enrolledstep 1: 172 volunteers na\uefve to ultrasound. After watching a video tutorial, a questionnaire was administered and considered to be passed when at least 70% of the questions were correctly answered. Course participants who passed the theoretical test were randomized to either intervention or control group. Learners randomized to the interventional group underwent to a practical training, tutored by an expert, before accessing DUS examination. Participants randomized to the control group directly accessed DUS examination, without any practical training. DUS measurements by learners and tutors were recorded and checked for accuracy, according to predefined criteria. Detection of both acoustic windows and accurate DUS assessment was achieved by 83.7% learners of the intervention group while 3.5% only among controls (p < 0.0001). The subcostal view of the Diaphragm was correctly identified by 92% and 65% learners in the intervention and control groups, respectively (p < 0.0001) while the apposition zone by 86% and 71% learners, respectively (p = 0.026). An accurate Diaphragm Displacement (DD) measurement was obtained by 91% and 45% learners in the intervention and control groups, respectively (p < 0.0001) while an accurate thickening fraction (TF) measurement by 99% and 21%, respectively (p < 0.0001). DD measurements by both groups of learners were significantly correlated with those assessed by expert tutors; however, a significant improvement of measurement accuracy was found in learners randomized to receive also the practical training, compared to controls. Conclusions: A combined approach consisting of a theoretical module followed by a practical training is more effective in managing acoustic windows and performing accurate measurements when compared to an exclusively theoretical course. Trial registration prospectively registered on clinicaltrials.gov (Identifier: NCT03704129; release date 17th October 2018)
Longhini F. - One of the best experts on this subject based on the ideXlab platform.
-
High-Flow Oxygen Therapy After Noninvasive Ventilation Interruption in Patients Recovering From Hypercapnic Acute Respiratory Failure: A Physiological Crossover Trial
2019Co-Authors: Longhini F., Pisani L., Lungu R., Bruni A., Garofalo E., Laura Vega M., Cammarota G., Nava S., Navalesi P.Abstract:OBJECTIVES: Assessing gas exchange, Diaphragm function, respiratory rate, and patient comfort during high-flow oxygen therapy and standard oxygen at the time of noninvasive ventilation discontinuation. DESIGN: Randomized crossover physiologic study.Two ICUs. PATIENTS: Thirty chronic obstructive pulmonary disease patients with hypercapnic acute respiratory failure receiving noninvasive ventilation greater than 24 hours. INTERVENTIONS: All patients underwent five 30-minute trials, the first, third, and fifth trial in noninvasive ventilation, whereas the second and fourth were randomly conducted with either standard oxygen and high-flow oxygen therapy. MEASUREMENTS AND MAIN RESULTS: Diaphragm Displacement and thickening fraction were determined by sonographic evaluation at the end of each trial. Arterial blood gases, respiratory rate, and patient comfort were also assessed. PaCO2 (p = 0.153) and pH (p = 0.114) were not different among trials, while PaO2 was greater in noninvasive ventilation than with both standard oxygen (p ≤ 0.005) and high-flow oxygen therapy (p ≤ 0.001). The Diaphragm Displacement was no different among trials (p = 0.875), while its thickening fraction was greater with standard oxygen, compared with high-flow oxygen therapy and all noninvasive ventilation trials (p < 0.001 for all comparisons), without differences between high-flow oxygen therapy and noninvasive ventilation. Respiratory rate also increased with standard oxygen, compared with both high-flow oxygen therapy (p < 0.001) and noninvasive ventilation (p < 0.01). High-flow oxygen therapy improved comfort, compared with standard oxygen (p = 0.004) and noninvasive ventilation (p < 0.001). CONCLUSIONS: At the time of noninvasive ventilation interruption, PaCO2 and Diaphragm Displacement remained unchanged regardless of the modality of oxygen administration. However, although standard oxygen resulted in a remarkable increase in Diaphragm thickening fraction, high-flow oxygen therapy allowed maintaining it unchanged, while improving patient comfort
-
High-Flow Oxygen Therapy After Noninvasive Ventilation Interruption in Patients Recovering From Hypercapnic Acute Respiratory Failure: A Physiological Crossover Trial
'Ovid Technologies (Wolters Kluwer Health)', 2019Co-Authors: Longhini F., Pisani L., Lungu R., Garofalo E., Cammarota G., Nava S., Fruni A, Ml Vega, Navalesi P.Abstract:Objectives: Assessing gas exchange, Diaphragm function, respiratory rate, and patient comfort during high-flow oxygen therapy and standard oxygen at the time of noninvasive ventilation discontinuation. Design: Randomized crossover physiologic study. Setting: Two ICUs. Patients: Thirty chronic obstructive pulmonary disease patients with hypercapnic acute respiratory failure receiving noninvasive ventilation greater than 24 hours. Interventions: All patients underwent five 30-minute trials, the first, third, and fifth trial in noninvasive ventilation, whereas the second and fourth were randomly conducted with either standard oxygen and high-flow oxygen therapy. Measurements and Main Results: Diaphragm Displacement and thickening fraction were determined by sonographic evaluation at the end of each trial. Arterial blood gases, respiratory rate, and patient comfort were also assessed. Paco(2) (p = 0.153) and pH (p = 0.114) were not different among trials, while Pao(2) was greater in noninvasive ventilation than with both standard oxygen (p
Yasunori Yoshida - One of the best experts on this subject based on the ideXlab platform.
-
a push mode piezo inkjet equivalent circuit model enhanced by Diaphragm Displacement measurements
AIP Advances, 2019Co-Authors: Yasunori Yoshida, Konami Izumi, Shizuo TokitoAbstract:This paper reports on ways to better predict droplet ejection velocity of push-mode piezo inkjet technology by upgrading the conventional equivalent circuit model. Calculation results from the traditional model imply that the driving pulse width conditions without ink ejection only periodically exist in the pull-push piezo driving mode. However, ink ejection is actually observed under any pulse width condition. The Displacement of the Diaphragm with respect to the piezo element input voltage waveform was measured with a highly accurate capacitive Displacement gauge to correct for the difference between the actual measurements and calculations. The equivalent circuit model was then modified so that the measured Diaphragm residual oscillations could be expressed. We presumed that an actual inkjet printhead contains an effective spring oscillation component, effective actuator mass, and damping component larger than that used in conventional equivalent circuit model calculations. We demonstrated that the difference between the calculated results and actual measurements could be reduced. Modifications to equivalent circuit model are based on the addition of an effective mechanical spring oscillation component having the same function as the ink chamber compliance, an increase in actuator inertance corresponding to the mass of the actuator, and an effective resistance element expressing a damped oscillation.This paper reports on ways to better predict droplet ejection velocity of push-mode piezo inkjet technology by upgrading the conventional equivalent circuit model. Calculation results from the traditional model imply that the driving pulse width conditions without ink ejection only periodically exist in the pull-push piezo driving mode. However, ink ejection is actually observed under any pulse width condition. The Displacement of the Diaphragm with respect to the piezo element input voltage waveform was measured with a highly accurate capacitive Displacement gauge to correct for the difference between the actual measurements and calculations. The equivalent circuit model was then modified so that the measured Diaphragm residual oscillations could be expressed. We presumed that an actual inkjet printhead contains an effective spring oscillation component, effective actuator mass, and damping component larger than that used in conventional equivalent circuit model calculations. We demonstrated that the dif...
-
A push-mode piezo inkjet equivalent circuit model enhanced by Diaphragm Displacement measurements
AIP Publishing LLC, 2019Co-Authors: Yasunori Yoshida, Konami Izumi, Shizuo TokitoAbstract:This paper reports on ways to better predict droplet ejection velocity of push-mode piezo inkjet technology by upgrading the conventional equivalent circuit model. Calculation results from the traditional model imply that the driving pulse width conditions without ink ejection only periodically exist in the pull-push piezo driving mode. However, ink ejection is actually observed under any pulse width condition. The Displacement of the Diaphragm with respect to the piezo element input voltage waveform was measured with a highly accurate capacitive Displacement gauge to correct for the difference between the actual measurements and calculations. The equivalent circuit model was then modified so that the measured Diaphragm residual oscillations could be expressed. We presumed that an actual inkjet printhead contains an effective spring oscillation component, effective actuator mass, and damping component larger than that used in conventional equivalent circuit model calculations. We demonstrated that the difference between the calculated results and actual measurements could be reduced. Modifications to equivalent circuit model are based on the addition of an effective mechanical spring oscillation component having the same function as the ink chamber compliance, an increase in actuator inertance corresponding to the mass of the actuator, and an effective resistance element expressing a damped oscillation