Calculate the P/F ratio using the following:
P-Pa02 82
F-F102 60%
The P/F ratio is used to assess the degree of hypoxemia in patients, particularly those with acute respiratory distress syndrome (ARDS). A P/F ratio of less than 300 suggests mild ARDS, less than 200 suggests moderate ARDS, and less than 100 indicates severe ARDS.
Given:
PaO₂ (Partial pressure of oxygen in arterial blood) = 82 mm Hg
FiO₂ (Fraction of inspired oxygen) = 60% = 0.60 (in decimal form)
The Correct Answer is ["136.67"]
Calculation:
The P/F ratio is calculated as:
P/F ratio= PaO₂÷ FiO₂
P/F ratio = 82÷0.60
=136.67
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Near-drowning: This is a direct cause of ARDS. Inhalation of water can lead to pulmonary edema, which triggers ARDS.
B. Aspiration: Aspiration of gastric contents can directly injure the lungs and is a well-known cause of ARDS.
C. Pancreatitis: Pancreatitis is associated with ARDS, but it is an indirect cause, not a direct one. The inflammatory response from pancreatitis can lead to ARDS, but it is not due to direct lung injury.
D. Toxic inhalation: Inhaling toxic substances can cause direct damage to the alveoli and lead to ARDS.
Correct Answer is B
Explanation
A. Imbalanced nutrition: Less than body requirements related to decreased oral intake: While this may be relevant, it is not the highest priority in acute appendicitis. Infection prevention is more critical.
B. Risk for infection related to possible rupture of appendix: The primary concern in appendicitis is the risk of rupture, leading to peritonitis and sepsis. This makes infection control the top priority.
C. Chronic pain related to appendicitis: Pain in appendicitis is acute, not chronic. Managing infection risk is more urgent.
D. Constipation related to decreased bowel motility and decreased fluid intake: Constipation is not a priority concern in the context of acute appendicitis. The risk of infection takes precedence.
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