scholarly journals Cardiopulmonary interactions in healthy children and children after simple cardiac surgery: the effects of positive and negative pressure ventilation

Heart ◽  
1997 ◽  
Vol 78 (6) ◽  
pp. 587-593 ◽  
Author(s):  
L. S Shekerdemian ◽  
A. Bush ◽  
C. Lincoln ◽  
D. F Shore ◽  
A. J Petros ◽  
...  
1991 ◽  
Vol 144 (2) ◽  
pp. 390-394 ◽  
Author(s):  
Enrique Fernandez ◽  
Paltiel Weiner ◽  
Ephraim Meltzer ◽  
Mary M. Lutz ◽  
David B. Badish ◽  
...  

2018 ◽  
Vol 37 (4) ◽  
pp. 520-530 ◽  
Author(s):  
Nader S. Aboelnazar ◽  
Sayed Himmat ◽  
Sanaz Hatami ◽  
Christopher W. White ◽  
Mohamad S. Burhani ◽  
...  

2018 ◽  
Vol 57 (6) ◽  
pp. 285
Author(s):  
Sindy Atmadja ◽  
Tina Christina Tobing ◽  
Rita Evalina ◽  
Sri Sofyani ◽  
Muhammad Ali

Background Major achievements in congenital heart disease (CHD) treatment over the past 20 years have altered the course and prognosis of CHD. Improvement of quality of life (QoL) is now a major goal of CHD treatment.Objective To assess the QoL in children after cardiac surgery for CHD.Methods A cross-sectional study was performed in children aged 2 to 18 years. The case group had 20 children with a history of corrective heart surgery in the 12 months prior to the study. The control group had 20 healthy children, age-matched  to the case group. The QoL of both groups was assessed by Pediatric Quality of Life Inventory (PedsQL) Generic Core Scales. The same post-operative children were also assessed with the PedsQL Cardiac Module. Data were analyzed using T-test with P < 0.05 as the level of significance.Results This study recruited 40 subjects: 20 post-operative and 20 healthy children. PedsQL Generic Core Scales assessment showed significant differences between groups in the physical function parameter of QoL (P<0.05) in children aged 13-18 years, but there were no significant differences in the social, emotional, and school function parameters. In children aged 2-12 years, there were no significant differences in physical, social, emotional, or school parameters. The PedsQL Cardiac Module assessment revealed that 35% of post-operative children was at risk for physical appearance problems, 80% was at risk for anxiety problems, 40% was at risk for cognitive problems, and 80% was at risk for communication problems.Conclusion Thirteen to 18-year-old children with non complex CHD have poorer physical function than healthy children. Post operative children are at risk for physical appearance, anxiety, cognitive, and communication problems.


1981 ◽  
Vol 50 (1) ◽  
pp. 149-161 ◽  
Author(s):  
A. I. Pack ◽  
R. G. DeLaney ◽  
A. P. Fishman

Studies were conducted in anesthetized paralyzed dogs using a cycle-triggered constant-flow ventilator, which ventilated the animal in phase with the recorded phrenic neural activity. Intermittently tests were performed in which the animal was ventilated with a different airflow for a single breath. Increased airflows, within the range generated during spontaneous breathing, caused an increased rate of rise of the moving average phrenic neurogram and a shortening of the duration of the nerve burst. The magnitude of the increase in the rate of rise of the neurogram was related to the level of inspiratory airflow. Tests with brief pulses of airflow showed that an increase in the rate of rise of the phrenic neurogram could be produced without inflating the lung above the resting tidal volume of the animal. Similar results were obtained with negative-pressure ventilation and the effects were abolished by vagotomy. This vagally mediated augmentation of phrenic neural output may accelerate the inspiratory volume change in the lung during spontaneous breathing at hyperpneic levels.


Author(s):  
Gisele C. de A. Cunha ◽  
José P. Lopes Neto ◽  
Dermeval A. Furtado ◽  
Valéria P. Borges ◽  
Elias A. Freire ◽  
...  

ABSTRACT Negative pressure ventilation in poultry houses has been used to enable the correction of their internal microclimates, and studies point to the heterogeneous distribution of air along the aviaries and the inadequacy of the environmental variables to the recommended ranges for thermal comfort of adult birds, especially in the hottest hours of the day. This study aimed to diagnose the facilities of a poultry house in the state of Paraíba, Brazil, regarding the distribution of environmental variables and thermal comfort; develop a computational model and validate it for Computational Fluid Dynamic - CFD simulations. Air temperature (Tair), air relative humidity (RH) and air velocity (Vair) data allowed characterizing the internal environment by comparison with the recommended ranges for each variable and by the temperature-humidity-velocity index (THVI). The poultry house does not provide comfort for the housed adult birds, between 12 and 14 h, with THVI indicating alert and Tair, RH and Vair values outside the recommended ranges; the CFD model for the poultry house was validated with Tair averages collected in the field of 27.75 ± 1.35 ºC and simulated of 27.85 ± 0.55 ºC, mean values of RH collected of 83 ± 12% and simulated of 78 ± 3%, and means of Vair collected of 2.35 ± 1.35 m s-1 and simulated of 2.50 ± 1.50 m s-1.


CHEST Journal ◽  
1989 ◽  
Vol 95 (1) ◽  
pp. 95-99 ◽  
Author(s):  
Robert D. Levy ◽  
T. Douglas Bradley ◽  
Stephen L. Newman ◽  
Peter T. Macklem ◽  
James G. Martin

2021 ◽  
Vol Publish Ahead of Print ◽  
Author(s):  
Cynthia A. Moffitt ◽  
Kathleen Deakins ◽  
Ira Cheifetz ◽  
Jason A. Clayton ◽  
Katherine N. Slain ◽  
...  

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