From the Research
Maximum Pressure Support on a Ventilator
The maximum pressure support on a ventilator is not explicitly stated in the provided studies. However, the studies provide information on the levels of pressure support used in different experiments and their effects on patients.
- The study 1 used a pressure support level of 12.5±3.2 cm H2O and 12.5±3.9 cm H2O with a fixed termination criterion.
- The study 2 increased pressure support in increments of 5 cm H2O at CPAP levels of 0, 2, and 4 cm H2O.
- The study 3 proposed a conceptual model to describe the interaction between patient and ventilator during pressure support ventilation, but did not specify a maximum pressure support level.
- The study 4 used a fixed level of pressure support ventilation (PSV) and compared it with volume support ventilation (VSV), with the pressure support level decreasing from 15.0+/-6.5 to 9.1+/-4.8 cmH2O after dead-space augmentation.
- The study 5 evaluated the effects of pressure support levels of 0, 10, 20, and 30 cm H2O on ventilatory pattern and components of the work of breathing.
Key Findings
- Increasing pressure support levels can decrease patient effort and improve patient-ventilator synchrony 1, 3.
- Higher levels of CPAP may hinder diaphragmatic function and prolong mechanical ventilation 2.
- Volume-guaranteed pressure-support ventilation may result in respiratory distress in clinical settings 4.
- Pressure support can reduce the inspiratory work of breathing, but may not eliminate patient-ventilator dyssynchrony 5.