Nokea
Which of these statements is false regarding Pulmonary Resistance?
- A. Increase in pulmonary arterial pressure generally cause a fall in pulmonary resistance
- B. Pulmonary resistance is only 1/10 of systemic circulation resistance
- C. Increase of lung volume results in increase of resistance in extra alveolar vessels
- D. Acetylcholine has a good bronchiole smooth muscle relaxation effect
Correct Answer: C
Rationale: Rationale for Correct Answer (C):
- Increase of lung volume results in decrease, not increase, in resistance in extra alveolar vessels due to increased recruitment of capillaries.
- This is known as distension recruitment, which helps reduce resistance in extra alveolar vessels.
- Increased lung volume also helps to distribute blood flow more evenly in the lungs, reducing resistance.
- Therefore, statement C is false.
Summary of Incorrect Choices:
A: True - increase in pulmonary arterial pressure generally causes a fall in pulmonary resistance due to vessel dilation.
B: True - pulmonary resistance is indeed lower than systemic circulation resistance due to shorter pulmonary vascular bed.
D: True - acetylcholine causes bronchiole smooth muscle contraction, not relaxation.
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The lower respiratory tract is consist except
- A. Nose
- B. bronchioleg
- C. Trachea
- D. both b and c
Correct Answer: A
Rationale: The correct answer is A: Nose. The lower respiratory tract includes the trachea, bronchioles, and lungs, but not the nose. The nose is a part of the upper respiratory tract, responsible for filtering, humidifying, and warming inhaled air. The trachea and bronchioles are part of the lower respiratory tract, involved in the passage of air into the lungs for gas exchange. Therefore, the nose does not belong to the lower respiratory tract, making it the correct answer. Choices B and C (bronchioles and trachea) are incorrect as they are part of the lower respiratory tract. Choice D is incorrect because both the bronchioles and trachea are part of the lower respiratory tract.
The emergency department (ED) manager is reviewing client charts to determine how well the staff perform when treating clients with community-acquired pneumonia. What outcome demonstrates that goals for this client type have been met?
- A. Antibiotics started before admission.
- B. Blood cultures obtained within 20 minutes.
- C. Chest x-ray obtained within 30 minutes.
- D. Pulse oximetry obtained on all clients.
Correct Answer: A
Rationale: The correct answer is A: Antibiotics started before admission. This outcome demonstrates that the staff are meeting the goal for treating clients with community-acquired pneumonia because timely administration of antibiotics is crucial in managing this condition effectively. Starting antibiotics promptly helps to reduce the spread of infection and improve patient outcomes.
Blood cultures obtained within 20 minutes (B) is important for diagnosing the specific pathogen causing pneumonia but does not directly reflect the treatment goal achievement. Chest x-ray within 30 minutes (C) is essential for diagnosis but does not indicate treatment success. Pulse oximetry on all clients (D) is important for monitoring oxygen levels but does not directly show if the treatment goal for pneumonia has been met.
Regarding ventilation
- A. Normal FEV1 is 70% of FVC
- B. FEV1 is decreased much more than FVC in patients with lung fibrosis
- C. FEV1 is dependent on expiratory effort
- D. FEV1 is about 42% of FVC in a patient with obstructive lung disease
Correct Answer: D
Rationale: The correct answer is D because in obstructive lung diseases like COPD, FEV1 is reduced compared to FVC due to air trapping. This is a characteristic feature of obstruction. A: Incorrect, normal FEV1/FVC ratio is around 80-85%. B: Incorrect, in lung fibrosis, both FEV1 and FVC are reduced but the reduction in FVC is typically more prominent. C: Incorrect, while expiratory effort affects FEV1 maneuver, it is not the sole determinant.
The fauces connects which of the following structures to the oropharynx?
- A. nasopharynx
- B. laryngopharynx
- C. nasal cavity
- D. oral cavity
Correct Answer: D
Rationale: The correct answer is D: oral cavity. The fauces is the opening between the oral cavity and the oropharynx. It is located at the back of the mouth, connecting the oral cavity to the oropharynx. This opening allows the passage of food and liquids from the mouth to the throat during swallowing. Choices A, B, and C are incorrect because the fauces does not connect to the nasopharynx, laryngopharynx, or nasal cavity. The fauces specifically connects the oral cavity to the oropharynx, making choice D the correct answer in this context.
The nurse doing rounds at the beginning of a shift notices a sputum specimen in a container sitting on the bedside table in a patient's room. The nurse asks the patient when he produced the sputum specimen and he states that the specimen is about 4 hours old. What action should the nurse take?
- A. Immediately take the sputum specimen to the laboratory.
- B. Discard the specimen and assist the patient in obtaining another specimen.
- C. Refrigerate the sputum specimen and submit it once it is chilled.
- D. Add a small amount of normal saline to moisten the specimen.
Correct Answer: B
Rationale: The correct answer is B: Discard the specimen and assist the patient in obtaining another specimen. It is important to discard the sputum specimen because it has been sitting for 4 hours, which could lead to contamination and inaccurate test results. The nurse should assist the patient in obtaining a fresh specimen to ensure accurate testing.
Choice A is incorrect because taking the old specimen to the lab could lead to inaccurate results. Choice C is incorrect because refrigerating the old specimen won't prevent contamination. Choice D is incorrect because adding saline to the old specimen can alter its composition and lead to inaccurate test results.