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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Correct Answer is ["15.94"]

Explanation

Convert the ordered dose to mcg/min:

10 mcg/kg/min × 85 kg = 850 mcg/min

Convert the available dose to mcg/mL:

800 mg = 800,000 mcg in 250 mL

Concentration = 800,000 mcg ÷ 250 mL

= 3200 mcg/mL

Calculate the infusion rate:

Infusion rate (mL/hour) = [Desireddose(mcg/min) ÷Concentration(mcg/mL)] ×60 min/hour

Infusion rate = (850 mcg/min ÷ 3200 mcg/mL) × 60 min/hour

= 15.94 mL/hour

The IV pump should be set to infuse at approximately 15.94 mL/hour to deliver the ordered dose of dopamine at 10 mcg/kg/min for a patient weighing 85 kg. This ensures the appropriate therapeutic effect.

A. An increase in O2 saturation to greater than 90% B. The onset of atrial fibrillation C. Louder S, and S2 heart sounds D. A decrease in heart rate to 66 bpm

Correct Answer is B

Explanation

A. An increase in O2 saturation to greater than 90%: An increase in oxygen saturation is typically a positive sign and does not indicate worsening heart failure.

B. The onset of atrial fibrillation: The development of atrial fibrillation (AFib) in a patient with heart failure is a sign of worsening heart failure, as it indicates increased atrial pressure and the potential for further hemodynamic compromise.

C. Louder S1 and S2 heart sounds: Louder heart sounds do not specifically indicate worsening heart failure. They may vary based on other factors such as body habitus or the position of the patient.

D. A decrease in heart rate to 66 bpm: A heart rate of 66 bpm is within the normal range and does not suggest worsening heart failure.

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Naxlex Comprehensive Predictor Exams

The physician orders dopamine at 10 mcg/kg/min. The pharmacy provides dopamine 800mg in 250 ml of D5W. What is the hourly IV pump rate? The patient weighs 85 kilograms. Order: Dopamine at 10 mcg/kg/min Available: Dopamine 800 mg in 250 mL D5W Patient weight: 85 kg

Correct Answer is ["15.94"]

Explanation

Which assessment finding indicates that a patient's heart failure (HF) is worsening?

Correct Answer is B

Explanation

Which of the following is an indication of Left sided heart failure?

Which of the following must be immediately performed in a patient who has just been intubated? (select all that apply)

The nurse assesses the port balloon on the ETT (endotracheal tube) of an intubated patient and is unsure if the balloon is properly inflated. What is the nurse's best action?

. A nurse is discussing management of hypertension with a patient. Which patient statement indicates that additional teaching about the relationship between hypertension and acute coronary syndrome (ACS) is needed?

A nurse educator is teaching a group of recent nursing graduates about their occupational risks for contracting hepatitis B. What preventative measures should the educator promote? Select all that apply.

Which of the following signs/symptoms would not be seen in a patient with cirrhosis?

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A client on long-term mechanical ventilation becomes very frustrated when he tries to communicate. Which intervention should the nurse perform to assist the client?