Air leakage during nocturnal mechanical ventilation in patients with neuromuscular disease

ITBM-RBM ◽  
2006 ◽  
Vol 27 (5-6) ◽  
pp. 227-232 ◽  
Author(s):  
A. Sabil ◽  
G. Mroue ◽  
H. Prigent ◽  
D. Orlikowski ◽  
M. Bohic ◽  
...  
Keyword(s):  
Mechanical Ventilation ◽  
Neuromuscular Disease ◽  
Air Leakage

scholarly journals The Required Amount of Ventilation Air for the Classroom and the Possibility of Air Infiltration through the Windows

Energies ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 7537
Author(s):  
Piotr Lis ◽  
Anna Lis
Keyword(s):  
Mechanical Ventilation ◽  
Urban Population ◽  
Heat Recovery ◽  
Main Issue ◽  
School Buildings ◽  
Air Leakage ◽  
Air Infiltration ◽  
Technical Requirements ◽  
Leakage Coefficient

The majority of education buildings in Poland are equipped with natural (gravity) ventilation, where the air inflow depends on the level of window airtightness. A complete statistical urban population of 50 school buildings in Czestochowa have been examined. The main issue to be clarified is the answer to the following questions: Is it theoretically possible to supply enough air to meet the ventilation requirements with gravity ventilation? What is the airtightness of the windows at which it will be possible? The average technical conditions of windows in the analysed buildings were bad. However, only in the case in which high external air leakage coefficient a = 7.0 m3/(h m daPa2/3) (q100KL = 32.4912 m3/(h m) is the amount of air passing through the leaks similar to the quantitative ventilation requirements for classrooms. The quantity of air flowing from the outside through modernized windows that meet the technical requirements (a = 0.6 to 1.0 m3/(m h daPa2/3)) covers on average only about 12% and about 21% of the ventilation needs. Without installing additional vents in the rooms, or better yet, installing mechanical ventilation with heat recovery, meeting the ventilation norm requirements will be impossible.

Long-term Mechanical Ventilation In Infants With Neuromuscular Disease

1988 ◽  
Vol 3 (1) ◽  
pp. 30-32 ◽  
Author(s):  
Susan T. Iannaccone ◽  
Timothy Guilfoile
Keyword(s):  
Mechanical Ventilation ◽  
Neuromuscular Disease

scholarly journals A Randomized Trial of Initiation of Chronic Noninvasive Mechanical Ventilation at Home vs In-Hospital in Patients With Neuromuscular Disease and Thoracic Cage Disorder

CHEST Journal ◽  
2020 ◽  
Vol 158 (6) ◽  
pp. 2493-2501 ◽  
Author(s):  
Ries J.M. van den Biggelaar ◽  
Anda Hazenberg ◽  
Nicolle A.M. Cobben ◽  
Michael A. Gaytant ◽  
Karin M. Vermeulen ◽  
...  
Keyword(s):  
Mechanical Ventilation ◽  
Randomized Trial ◽  
Neuromuscular Disease ◽  
Noninvasive Mechanical Ventilation ◽  
Thoracic Cage ◽  
At Home

scholarly journals Non-Intrusive Measurements to Incorporate the Air Renovations in Dynamic Models Assessing the In-Situ Thermal Performance of Buildings

Energies ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 37
Author(s):  
María José Jiménez ◽  
José Alberto Díaz ◽  
Antonio Javier Alonso ◽  
Sergio Castaño ◽  
Manuel Pérez
Keyword(s):  
Mechanical Ventilation ◽  
Reference Values ◽  
Dynamic Models ◽  
Measurement Techniques ◽  
Co2 Concentration ◽  
Air Leakage ◽  
Tracer Gas ◽  
Gas Measurements ◽  
Different Levels

This paper reports the analysis of the feasibility to characterise the air leakage and the mechanical ventilation avoiding the intrusiveness of the traditional measurement techniques of the corresponding indicators in buildings. The viability of obtaining the air renovation rate itself from measurements of the concentration of the metabolic CO2, and the possibilities to express this rate as function of other climatic variables, are studied. N2O tracer gas measurements have been taken as reference. A Test Cell and two full size buildings, with and without mechanical ventilation and with different levels of air leakage, are considered as case studies. One-month test campaigns have been used for the reference N2O tracer gas experiments. Longer periods are available for the analysis based on CO2 concentration. When the mechanical ventilation is not active, the results indicate significant correlation between the air renovation rate and the wind speed. The agreement between the N2O reference values and the evolution of the metabolic CO2 is larger for larger initial values of the CO2 concentration. When the mechanical ventilation is active, relevant variations have been observed among the N2O reference values along the test campaigns, without evidencing any correlation with the considered boundary variables.

scholarly journals The clinical effects of high-frequency oscillatory ventilation in the treatment of neonatal severe meconium aspiration syndrome complicated with severe acute respiratory distress syndrome

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Guang Yang ◽  
Yunxia Qiao ◽  
Xinxin Sun ◽  
Tiandan Yang ◽  
Aiying Lv ◽  
...  
Keyword(s):  
Mechanical Ventilation ◽  
High Frequency ◽  
Distress Syndrome ◽  
Meconium Aspiration Syndrome ◽  
High Frequency Oscillatory Ventilation ◽  
Air Leakage ◽  
Meconium Aspiration ◽  
Oxygen Inhalation ◽  
Mechanical Ventilation Time ◽  
High Frequency Oscillatory

Abstract Objective To explore the efficacy and safety of high-frequency oscillatory ventilation (HFOV) in the treatment of severe meconium aspiration syndrome (MAS) complicated with severe acute respiratory distress syndrome (ARDS). Methods A total of 65 infants with severe MAS complicated with severe ARDS were included in the study. The clinical efficacy of treatment for the HFOV group (n = 31) and the conventional mechanical ventilation (CMV) group (n = 34) was retrospectively analysed. The partial pressure of oxygen (PaO2), partial pressure of carbon dioxide (PaCO2), PaO2/fraction of inspired oxygen (FiO2), and oxygen index values before and at 6, 12, 24, 48, and 72 h after mechanical ventilation, the mechanical ventilation time, oxygen inhalation time, incidence of complications, and outcomes of the two groups were compared. Results At 6, 12, 24, and 48 h after mechanical ventilation, the PaO2 in the HFOV group was significantly higher than in the CMV group, while the PaCO2 in the HFOV group was significantly lower than in the CMV group (P < 0.05). At 6, 12, 24, 48, and 72 h after mechanical ventilation, PaO2/FiO2 in the HFOV group was significantly higher than in the CMV group, and the OI in the HFOV group was significantly lower than in the CMV group (P < 0.05). Mechanical ventilation time, oxygen inhalation time, and the incidence of air leakage were significantly lower in the HFOV than in the CMV group (P < 0.05). Conclusions Overall, HFOV can effectively improve lung ventilation and oxygenation function, shorten ventilator treatment time, and reduce the incidence rate of air leakage for neonatal MAS, making it a safe and effective treatment option.

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