In this study, the impacts of different ventilation modes on respiratory mechanics, blood gas and hemodynamics in elderly patients undergoing laparoscopic cholecystectomy (LC) were compared. 60 LC patients were divided into 3 groups: group L (low tidal volume), group L + P (low tidal volume + positive end expiratory pressure) and group C (large tidal volume). Endotracheal intubation was placed ...

The effects of thiopentone and ICI 35 868 on minute volume, respiratory frequency, tidal volume and arterialized venous PCO2, pH and standard bicarbonate have been compared in the rabbit. ICI 35 868 has two to three times the potency of thiopentone, but equivalent anaesthetic doses cause similar decreases in minute volume. ICI 35 868 decreased tidal volume to a greater extent than thiopentone. ...

The natural evolution of the estuary-coastal lagoon system of the Ria de Aveiro, Portugal, was halted in 1808 by the construction of a new inlet/outlet channel through the sand spit which isolates it from the Atlantic Ocean. In consequence, tidal amplitudes in the lagoon increased from 0.07–0.13 m to over 1 m. Improvements to the channel since 1936, including construction of jetties, breakwater...

Stebbings, J. H. (1974). Thorax, 29, 505-510. Fractional carbon monoxide uptake in an employed population. The fractional carbon monoxide uptake in 913 New York City transit workers was studied. A prediction equation for white males, based on nonsmokers, was obtained: fractional CO uptake= 0 58032-0000204 x age+ 0 0004 x weight (kilograms). Weight was the index of body size most strongly correl...

OBJECTIVE Systolic pressure variation results from cyclical fluctuation in the intra-thoracic pressure associated with mechanical ventilation and has been used as a measure of relative hypovolemia in mechanically ventilated patients. The impact of the magnitude of the tidal volume and airway pressure on systolic pressure variation, however, has not been examined in mechanically ventilated patie...

In the present paper simulation of tidal currents on three-dimensional geometry of the Persian Gulf is performed by the solution of the depth averaged hydrodynamics equations. The numerical solution was applied on two types of discritized simulation domain (Persian Gulf); with and without major islands. The hydrodynamic model utilized in this work is formed by equations of continuity and motion...