Author Page
Unplanned Extubation: Results
During the study period, there were 319 mechanically ventilated patients in the MICU; 23 unplanned extubations occurred during the same period (7 percent of all ventilated patients). Of the 23 events, only 2 appeared to have been accidental extubations, while the remainder were most likely intentional (self-extubations). In all cases, important measures had been taken […]
Unplanned Extubation: Methods
Unplanned extubation, self-extubation or accidental extubation, is a common occurrence in mechanically ventilated patients.* Although many patients require reintubation, 47 percent to 69 percent fare well without further ventilatory support. Because weaning parameters are often unavailable at the time of unplanned extubation, it would be useful to define routinely available pre-extubation respiratory and ventilatory parameters […]
Hemodynamic and Oxygen Transport Characteristics of Common Ventilatory Modes: Recommendation
The V02 decreased only on PSV of 5 cm H20. Furthermore, mean inspiratory flow increased and the duty cycle decreased significantly with increasing level of PSV. Fassoulaki and Eforakopoulou compared pressure support levels of 0,7,14, and 21 cm H2O for 1 h each in patients with respiratory failure and during postoperative period. With increasing level […]
Hemodynamic and Oxygen Transport Characteristics of Common Ventilatory Modes: Conclusion
The information comparing SIMV and ACV modes are conflicting. Opposite effects of SIMV on cardiac function’ and oxygen consumption have been reported. The SIMV can influence oxygen consumption as the result of increasing the oxygen cost of breathing by the respiratory muscles during spontaneous breathing activity. This, in turn, could be reflected in the frequency […]
Hemodynamic and Oxygen Transport Characteristics of Common Ventilatory Modes: Discussion
The SIMV mode has been promoted as a mean of positive-pressure ventilatory support with minimal effect on venous return by allowing ITP to decrease during the spontaneous inspiratory efforts. Previous studies had suggested that in normal individuals and in those with ventricular dysfunction the steady state cardiac output is not different on SIMV as compared […]
Hemodynamic and Oxygen Transport Characteristics of Common Ventilatory Modes: Results
Results of this study show that patients on SIMV and PSV modes can achieve similar levels of Ve as when on ACV mode. However, Vt is significantly diminished and f is raised substantially during SIMV to reach similar Ve as achieved on the other two ventilatory modes. It is also noteworthy that in both SIMV […]
Hemodynamic and Oxygen Transport Characteristics of Common Ventilatory Modes: Statistical Analysis
Baseline ventilatory, hemodynamic, and oxygen transport data were obtained on ACV mode. Patients were then placed sequentially on SIMV and PSV modes for 30 min each. All measurements were repeated during the last 10 min before patients were switched to the next ventilatory mode. After the study was completed, patients were placed back on the […]