Nokea
The physician orders a PFT. The patient asks you how the test is performed. The best response is:
- A. A tube is inserted into lungs while the patient is asleep to expand his/her lungs to their full capacity.
- B. The patient breathes through a mouthpiece into a spirometer until all air in lungs is expelled. Then the patient will take a deep breath through the mouthpiece. This is done three times and a computer calculates the capacity of lungs.
- C. The patient breathes into a spirometer to measure lung capacity.
- D. A computer is used to measure volume and vital capacity.
Correct Answer: B
Rationale: The correct answer is B. Pulmonary function tests involve breathing into a spirometer to measure lung volumes and capacities. A is incorrect as no tube is inserted. C is incomplete. D focuses only on the computer aspect without explaining the procedure.
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A home health nurse is visiting a new client who uses oxygen in the home. For which factors doesn't the nurse assess when determining if the client is using the oxygen safely?
- A. The client does not allow smoking in the house.
- B. Electrical cords are in good working order.
- C. Flammable liquids are stored in the garage.
- D. Household light bulbs are the fluorescent type.
Correct Answer: D
Rationale: The correct answer is D because household light bulbs being fluorescent type is unrelated to the safe use of oxygen. The nurse should assess factors directly related to oxygen safety, such as smoking restrictions, electrical cord condition, and proper storage of flammable materials. Fluorescent light bulbs do not pose a significant risk in relation to oxygen safety.
A sputum study has been ordered for a patient who has developed coarse chest crackles and a fever. At what time should the nurse best collect the sample?
- A. Immediately after a meal
- B. First thing in the morning
- C. At bedtime
- D. After a period of exercise
Correct Answer: B
Rationale: The correct answer is B: First thing in the morning. Sputum should be collected in the morning because it is usually more concentrated, making it easier to obtain a good sample. This is important for accurate analysis and identifying potential pathogens causing the patient's symptoms. Collecting sputum immediately after a meal may result in contamination with food particles. At bedtime, sputum may have accumulated overnight, but morning samples are still preferred due to concentration. Collecting sputum after a period of exercise may introduce respiratory secretions not reflective of the underlying condition.
A nurse is caring for a client who received benzocaine spray prior to a recent bronchoscopy. The client presents with continuous cyanosis even with oxygen therapy. Which action should the nurse take next?
- A. Administer an albuterol treatment.
- B. Notify the Rapid Response Team.
- C. Assess the client's peripheral pulses.
- D. Obtain blood and sputum cultures.
Correct Answer: B
Rationale: The correct answer is B: Notify the Rapid Response Team. Continuous cyanosis despite oxygen therapy following benzocaine administration may indicate methemoglobinemia, a serious adverse effect. Rapid Response Team should be alerted for immediate intervention and monitoring. Albuterol treatment (A) would not address methemoglobinemia. Assessing peripheral pulses (C) may not provide immediate assistance. Obtaining blood and sputum cultures (D) is not the priority in this situation.
Which class of drugs often inhibits carbonic anhydrase and is used for certain medical conditions?
- A. Antibiotics
- B. Antihistamines
- C. Carbonic anhydrase inhibitors
- D. Antidepressants
Correct Answer: C
Rationale: The correct answer is C: Carbonic anhydrase inhibitors. These drugs inhibit the enzyme carbonic anhydrase, which plays a role in various physiological processes. They are used to treat conditions such as glaucoma, epilepsy, and altitude sickness. Antibiotics (A) target bacterial infections, antihistamines (B) relieve allergy symptoms, and antidepressants (D) treat depression, making them unrelated to carbonic anhydrase inhibition.
Alveolar ventilation in a male with a respiratory rate of 10/min and tidal volume of 600 ml is
- A. 1000ml
- B. 1750 ml
- C. 3000ml
- D. 4500ml
Correct Answer: D
Rationale: The correct answer is D: 4500ml. Alveolar ventilation is calculated by multiplying tidal volume by respiratory rate. In this case, 600ml (tidal volume) x 10/min (respiratory rate) = 6000ml/min. However, we need to consider dead space ventilation, which is about 150ml. Therefore, the final alveolar ventilation is 6000ml/min - 150ml = 5850ml/min. Since the question asks for alveolar ventilation per minute, the correct answer is the closest option, which is D: 4500ml.
Choices A, B, and C are incorrect because they do not accurately reflect the calculation of alveolar ventilation based on the provided respiratory rate, tidal volume, and dead space ventilation.