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Q1A respiratory therapist is evaluating a patient with chronic obstructive pulmonary disease (COPD) who is experiencing a severe exacerbation. The patient's partial pressure of arterial oxygen ($$PaO_{2}$$) has dropped significantly. Which of the following medications should NOT be used to rapidly improve the patient's oxygenation?
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✓ Correct answer: Tiotropium
Answer: Tiotropium Tiotropium is a long-acting muscarinic antagonist (LAMA) used for maintenance therapy in COPD and is not effective for rapid relief. Albuterol, levalbuterol, and ipratropium are all short-acting medications and are more appropriate for treating acute exacerbations.
Q2Which of the following is NOT an advantage of using invasive mechanical ventilation over non-invasive ventilation methods?
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✓ Correct answer: It reduces the risk of ventilator-associated pneumonia (VAP)
Answer: It reduces the risk of ventilator-associated pneumonia (VAP) While invasive mechanical ventilation has several advantages such as offering better control over oxygen levels, providing more accurate monitoring of ventilatory parameters, and being suitable for more severe cases of respiratory failure, it increases the risk of ventilator-associated pneumonia (VAP) compared to non-invasive methods.
Q3Which of the following conditions is BEST treated with positive pressure ventilation?
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✓ Correct answer: Acute respiratory distress syndrome (ARDS)
Answer: Acute respiratory distress syndrome (ARDS) Positive pressure ventilation is most effective for conditions like ARDS as it helps improve oxygenation and reduces the work of breathing by keeping alveoli open. While positive pressure ventilation may assist in the general management of COPD, pulmonary fibrosis, and pulmonary embolism, it is not the primary treatment modality for these conditions. Pulmonary fibrosis involves lung scarring that doesn't necessarily benefit from positive pressure, pulmonary embolism primarily requires antithrombotic treatment, and COPD management often focuses on airway clearance and bronchodilation.
Q4What percentage of a nebulized medication dose typically reaches the alveoli when administered correctly?
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✓ Correct answer: 10%
Answer: 10% Only 10% of a nebulized medication dose typically reaches the alveoli. Ensuring proper technique during administration is crucial to maximize the therapeutic effect of the medication.
Q5A patient is being ventilated in an ICU at 25°C with a relative humidity of 60%. What is the absolute humidity of the air? (Note: at 25°C, air can hold 23.1 mg H2O/L)
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✓ Correct answer: 13.86 mg H2O/L
Answer: 13.86 mg H2O/L Absolute humidity is calculated by multiplying relative humidity by the capacity of air to hold water. For this question, the equation is 0.60 * 23.1 mg H2O/L = 13.86 mg H2O/L.
Q6Which of the following conditions does NOT necessitate careful monitoring when initiating a bronchodilator therapy?
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✓ Correct answer: Hypotension
Answer: Hypotension Bronchodilator therapy, particularly with beta-agonists, can cause an increase in heart rate and blood pressure due to its stimulatory effects. Conditions such as hypertension, tachycardia, and cardiac arrhythmias must be carefully monitored as the medication can exacerbate these issues. Hypotension, on the other hand, is not typically aggravated by bronchodilators and thus does not require additional consideration.
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