CONTEXT Endotracheal tube cuff pressure (ETCP) is recommended to be maintained between 20-30 cm H2O limits. While insufficient inflation of ETC may cause aspirations, over-inflation of it may lead to damage in tracheal epithelium. AIMS We planned to investigate the effects of user experience and cuff pressure inflation method differences following endotracheal tube cuff pressure and complaint...

486 Communications to the Editor well described by Pepe and Marini#{176}and is an important cause of hypotension in mechanically ventilated patients. The lungs are unable to exhale to FRC at the start of the next mechanically initiated inspiration because of airway obstruction. Positive end expiratorv intrathoracic pressure builds up, although this cannot be shown on the ventilator manometer. T...

Sieker, Gauer and Henry (1), examining nor-motensive subjects, have demonstrated that breathing against continuous negative pressure elicits a moderate water diuresis, believed to be mediated by stretch receptors in the left atrium and reflex inhibition of the secretion of the antidiuretic hormone. This water diuresis, which has been confirmed by others (2-4) is not accompanied in nor-motensive...

An automated tension infiltrometer including a soil contacting base to which is mounted a porous plate for interfacing the infiltrometer with the soil to be analyzed. A Marriotte column is positioned in the base so that its open bottom end abuts the porous plate. A bubble tower is also positioned in the base and has a bubbling tube operatively connected between its interior and interior of the ...

NIST pressure calibration services with nitrogen are now based on two transfer standard piston gages for which the effective areas have been determined by calibration with the manometer developed at NIST for gas thermometry. Root-sum-squared three sigma uncertainties for the areas for the two gages are 3.05 ppm and 4.18 ppm.

Work in compressed air is a dangerous activity, whether it is carried on under water in a conventional diving suit, in self-contained breathing apparatus or in a diving bell, or in relatively dry conditions in a caisson or an underwater tunnel. Surprisingly large numbers of men have worked at one time or another in compressed air in tunnels or caissons and it is the dangers which arise to the h...

conclusions implementing educational programs with the introduction of estimation techniques besides the use of manometer as a standard intraoperative monitoring will improve the safety of the practice. results the mean etcp after the in vitro survey was significantly lower than the mean etcp before the intervention (45 ± 13 vs. 51 ± 15 cm h2o, p = 0.002). the rate of measurements within the sa...