Tidal volumeįirst, be sure to base the tidal volume on the patient’s predicted body weight (PBW). CPAP delivered through an advanced airway may be used if the patient does not require ventilatory support. Modes such as high frequency oscillation and Jet ventilation are also not used as an initial mode of ventilation. Therefore, modes such as A/C, SIMV, PRVC and pressure control are all acceptable initial modes of ventilation on the RRT board exam. As long as the tidal volume is set appropriately when using volume control (6-8 ml/kg of predicted body weight), or the inspiratory pressure is set appropriately when using pressure control (20-30 cm H2O), any of these modes will work. This creates confusion as similar modes may have entirely different names depending on the manufacturer.įurthermore, patients can be effectively ventilated using any form of volume or pressure control.
Also, there is no universal naming system for ventilator modes. This is probably due to the vast number of ventilator modes that exist. Students should take comfort that initial mode selection is not emphasized by the NBRC to determine if an answer is correct or not. With that said, let’s review initial ventilator settings. However, we may increase this rate beyond 20 once we’re able to analyze arterial blood gas, airway pressures, and hemodynamic data collected while the patient is on the ventilator. This is because when choosing initial ventilator settings we don’t yet have arterial blood gas, or lung compliance data to guide our choices.įor example, the recommended initial mandatory rate is 10 to 20 breaths per minute. Therefore, it is crucial that respiratory therapy students have a thorough understanding of initial ventilator setting selection.īefore we get started, an important concept to understand is that acceptable initial ventilator settings are different than the ventilator settings used when making changes. Selecting initial ventilator settings is frequently tested on both the TMC-RRT and clinical simulation board exams.
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