Certified Transport Registered Nurse Certification Practice Exam

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Prepare for the Certified Transport Registered Nurse Test. Use flashcards and multiple choice questions with hints and explanations. Equip yourself for success in your certification exam!

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A P/F ratio of less than 100 indicates which level of ARDS?

Moderate ARDS
Mild ARDS
Severe ARDS
Normal lung function

The correct answer is: Severe ARDS

A P/F ratio, or the ratio of arterial oxygen partial pressure (PaO2) to the fractional inspired oxygen (FiO2), is a critical parameter used to assess the severity of Acute Respiratory Distress Syndrome (ARDS). When the P/F ratio is less than 100, it signifies a state of critical hypoxemia, indicating severe impairment of gas exchange in the lungs. In the context of ARDS classification, the P/F ratio is categorized as follows: - Mild ARDS: P/F ratio between 200 and 300. - Moderate ARDS: P/F ratio between 100 and 200. - Severe ARDS: P/F ratio of less than 100. Therefore, a P/F ratio of less than 100 aligns with the definition of severe ARDS, where patients are in a critical state, often requiring significant interventions such as mechanical ventilation and potentially being at higher risk for complications. Understanding this classification is essential for healthcare professionals in making decisions regarding patient management and interventions in ARDS cases, particularly in transport settings where critical care nurses frequently operate.