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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)
Answer and Explanation

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


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Related Questions

Correct Answer is B

Explanation

A. Respiratory acidosis: Respiratory acidosis would present with a low pH (below 7.35) and a high PaCO2 (above 45 mmHg).

B. Respiratory alkalosis: This ABG shows a high pH (7.51), low PaCO2 (32 mmHg), and normal HCO3- (26 mEq/L), indicating respiratory alkalosis, typically due to hyperventilation.

C. Metabolic acidosis: Metabolic acidosis would present with a low pH and low HCO3-, but in this case, the HCO3- is normal.

D. Metabolic alkalosis: Metabolic alkalosis would show a high pH and high HCO3-, but the HCO3- in this ABG is normal.

Correct Answer is C

Explanation

A. PT/INR: PT/INR is used to assess clotting function and liver synthetic function but does not directly relate to the symptoms of lethargy and confusion.

B. Urea: Urea levels are related to kidney function and protein metabolism but do not directly explain the symptoms of encephalopathy.

C. Ammonia: Elevated ammonia levels in cirrhosis can lead to hepatic encephalopathy, which presents as lethargy and confusion. The liver is unable to convert ammonia to urea, leading to its accumulation in the blood.

D. Albumin: Albumin levels are important in assessing nutritional status and fluid balance in cirrhosis but do not directly cause lethargy and confusion.

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