Certified Transport Registered Nurse Certification Practice Exam

What is the recommended tidal volume calculation for normal lungs?

1. 6 - 10 ml/kg

2. 4 - 8 ml/kg

3. 10 - 15 ml/kg

4. 2 - 5 ml/kg

The correct answer is: 6 - 10 ml/kg

The recommended tidal volume calculation for normal lungs is typically set between 6 to 10 ml/kg of ideal body weight. This range is based on balancing adequate ventilation and minimizing the risk of ventilator-induced lung injury. Using a tidal volume within this range helps ensure that sufficient air is delivered to the alveoli for gas exchange, while also preventing over-distention of alveoli that can occur with higher volumes. When utilizing this calculation, it is crucial for healthcare providers to consider the patient's specific condition, as factors like lung compliance and the presence of respiratory illness can influence the ideal tidal volume. In situations where lung function is compromised, adjustments to tidal volume may be necessary; however, for normal lung function, this range provides a safe and effective guideline for mechanical ventilation strategies.