This study was conducted to determine the significance of computational results according application porous media in occupied zone when analyzing air temperature distribution broiler house using fluid dynamics. For such experimental conditions, outside controlled two circumstances : 1) summer and 2) winter. Also, ventilation methods were as well tunnel cross ventilation, differentiating amount...

OBJECTIVE The purpose of this study was to explore the effects of three different ventilatory modes: volume controlled ventilation (VCV), pressure controlled ventilation (PCV) and pressure controlled ventilation-volume guaranteed (PCV-VG) on arterial oxygenation and airway pressure during one-lung ventilation (OLV) in elderly patients. METHODS We enrolled 66 patients who underwent thoracic su...

Abstract: Background There has been an exponential increase in modes of mechanical ventilation over the last couple decades. With this increase, there have paucity evidence which mode is superior to others or much guidance use a different disease status causing respiratory failure. Methods: An international survey six questions was posted on “society ventilation” website and advertised social m...

Pressure controlled ventilation (PCV) is an alternative mode of ventilation which is used widely in severe respiratory failure. In this study, PCV was used for one-lung anaesthesia and its effects on airway pressures, arterial oxygenation and haemodynamic state were compared with volume controlled ventilation (VCV). We studied 48 patients undergoing thoracotomy. After two-lung ventilation with ...

We read with great interest the article published by Chen et al. [1] regarding a systematic assessment of respiratory mechanics in patients with ARDS to determine ventilation parameters and the optimal mode. They used basic monitoring along with the placement of an esophageal balloon catheter to measure transpulmonary pressure. We believe that monitoring pulmonary mechanics may be useful, not o...

The mode of ventilation used during awake extubation has not previously been studied. We conducted a randomised controlled trial comparing spontaneous respiration, intermittent positive pressure ventilation, and pressure support ventilation (each n = 13) for incidence and severity of peri-extubation complications following routine elective surgery. We found the severity of peri-extubation cough...

INTERVENTIONS Once apnoeic after induction of general anaesthesia, face mask ventilation began with pressure controlled ventilation, at a peak inspiratory pressure of 15 cmH2O. Each patient was ventilated for three 1-min intervals with the head position alternated every minute: group A, mask ventilation was performed with a neutral head position for 1 min, followed by an axial head position rot...

set ventilators. Objective: To define and characterize the transient re¬ sponse of VCO2 to a well-defined change in ventilation. Methods: Forty-four patients in stable condition re¬ ceiving volume-controlled mechanical ventilation had trend recordings of ventilator pressures, flow, volumes, Vco2, and end-tidal CO2 (ETCO2) for 20 min. At time t0, the minute ventilation was either increased (n=22...

Introduction Emphysema is characterized by irreversible enlargement of the airspaces distal to the terminal bronchiole, accompanied by destruction of their walls, and impairment of cardiac function. Acute exacerbation of emphysema leads to increased morbidity, mortality and, in some cases, requirement of invasive mechanical ventilation (MV). So far, no study has compared the impact of pressure-...

In a recent issue of CHEST (June 2015), we read with interest the randomized controlled trial (RCT) by Kirakli et al comparing adaptive support ventilation (ASV) with pressure assist/control ventilation (P-ACV) for the entire duration of mechanical ventilation (MV) in a cohort of 229 patients in the medical ICU. The study showed a shorter duration of the weaning process and total MV in the ASV ...