The preponderance of evidence indicates that high airway pressure is not by itself injurious to the lung. Rather, overdistention of the lung appears to be the fundamental mechanism underlying VALI. The physician must bear in mind the factors (ie, flow-resistive pressure losses, respiratory muscle activity, and abnormalities in rib cage or abdominal compliance) that may alter the relationship be...

experiments were conducted to evaluate the performance of a low heat rejection (lhr) diesel engine. performance parameters and emission levels were determined at various magnitudes of brake mean effective pressure. combustion characteristics of the engine were measured with tdc (top dead centre) encoder, pressure transducer, console and special pressure-crank angle software package at peak load...

INTRODUCTION Cough intensity is an important determinant of cough severity reported by patients. Cough sound analysis has been widely validated for the measurement of cough frequency but few studies have validated its use in the assessment of cough strength. We investigated the relationship between cough sound and physiological measures of cough strength. METHODS 32 patients with chronic coug...

OBJECTIVE To assess possible alterations in the tidal volume and peak inspiratory pressure delivered by seven models of manually operated self-inflating resuscitation bags as a function of the oxygen supply rate used. METHODS The resuscitation bags tested were the following: Oxigel, models A and B; CE Reanimadores; ProtecSolutions; Missouri; Axmed; and Narcosul. For the measurements, a wall o...

BACKGROUND/AIM The aim of this study was to quantify the changes in middle ear pressure (MEP) during robot-assisted radical prostatectomy (RARP). MATERIALS AND METHODS Thirty patients undergoing RARP were included in this study. MEP was obtained at the following time points: awake (T1), postintubation (T2), pneumoperitoneum + 1 h of Trendelenburg position (T3), pneumoperitoneum + 2 h of Trend...

AIM To study the effect of positional change on inferior vena cava (IVC) diameter. The influence of positional change on IVC size is not well studied. Although the American Society of Echocardiography guidelines for chamber quantification recommend imaging the IVC in the left lateral position, many labs routinely image the IVC from the supine position. METHODS AND RESULTS Forty-three patients...

BACKGROUND This study was designed to assess the effects of pneumoperitoneal pressure (PP) and positional changes on the respiratory mechanics during laparoscopy assisted colectomy. METHODS Peak inspiratory pressure, plateau pressure, lung compliance, and airway resistance were recorded in PP of 10 mmHg and 15 mmHg, with the position change in 5 steps: head-down at 20°, head-down at 10°, neut...

AIM Two different ventilation protocols during general anesthesia have been compared regarding their effects on amount of epidural bleeding during lumbar microdiscectomy in the prone position. Previous studies have not not revealed a relationship between ventilation mode and epidural bleeding in the prone position while measuring the intra-abdominal pressure (IAP) level. MATERIAL AND METHODS ...

The primary objective was to compare oropharyngeal leak pressures of streamlined liner of pharyngeal airway (SLIPA TM ) and Baska mask at different head and neck positions. Assessing the fiberoptic view of glottis and ventilation score of both devices in different positions were the secondary objectives. Sixty patients ASA I-II, 18-60 years of either sex scheduled for short ambulatory surgery w...