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1. Which of the following is the goal of mechanical ventilation?
Provide adequate alveolar ventilation with minimal lung damage
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Which of the following is the best definition of peak inspiratory pressure?
The maximum pressure exerted against the patient's airway during inspiration
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What best describes wasted ventilation?
The ratio of physioogic deadspace to tidal volume
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Of the following, which alter the duration of ventilation?
1. Rate
2. Flow
3. Pip
4. PEEP
5. IT
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Assuming an alveolar opening pressure of 23 cm H2O, which of the following combinations of PIP and PEEP would achieve the desired compression pressure?
PIP-26, PEEP- 3
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Normal lung compliance in a newborn is:
2.5 to 5 ml/cm H2O
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Of the following, which are determinants of pulmonary compliance?
1. Elastic Elements
2. Alveolar surface forces
3. Plateau pressure
4. Airway resistance
5. Dynamic ventilatory pressures
- Elastic Elements
- Alveolar surface forces
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As volume is extracted from the thorax at its unstressed volume, the ribs:
Recoil outward
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With overexpansion of the lungs caused by air trapping, lung compliance is:
Reduced
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RDS lowers lung compliance by:
Increasing alveolar surface forces
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Which is the main factor that determines airway resistance?
airway radius
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The normal airway resistance in a spontaneously breathing neonate is:
20 to 30 cmH2O/L/sec
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Endotracheal tube resistance can be reduced by:
Shortening the tube
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In the presence of which of the following scenarios could shorter inspiratory times and faster rates be used without the risk of air trapping?
RDS
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With a compliance of 3.6 ml/cmH2O and an airway resistance of 42 cm H2O/L/sec, what would be an appropriate expiratory time?
0.46 sec
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