Nokea
Which of the following lab values would indicate symptomatic AIDS in the medical chart? (T4 cell count per deciliter)
- A. Greater than 1000 cells per deciliter
- B. Less than 500 cells per deciliter
- C. Greater than 2000 cells per deciliter
- D. Less than 200 cells per deciliter
Correct Answer: D
Rationale: A T4 cell count of less than 200 cells per deciliter indicates symptomatic AIDS. This severe depletion of T4 cells signifies advanced HIV infection and a significantly compromised immune system. Choices A, B, and C are incorrect because T4 cell counts above 2000, above 1000, or below 500 cells per deciliter, respectively, are not indicative of symptomatic AIDS.
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An infection in a central venous access device is not eliminated by giving antibiotics through the catheter. How might bacterial glycocalyx contribute to this?
- A. It protects the bacteria from antibiotic and immunologic destruction.
- B. Glycocalyx neutralizes the antibiotic, rendering it ineffective.
- C. It competes with the antibiotic for binding sites on the microbe.
- D. Glycocalyx provides nutrients for microbial growth.
Correct Answer: A
Rationale: Bacterial glycocalyx is a viscous polysaccharide or polypeptide slime that covers microbes. It plays a significant role in protecting bacteria by enhancing adherence to surfaces, resisting phagocytic engulfment by white blood cells, and preventing antibiotics from contacting the microbe. Choice A is correct because glycocalyx shields the bacteria from both antibiotics and the immune system, allowing the infection to persist. Choices B, C, and D are incorrect because glycocalyx does not neutralize antibiotics, compete for binding sites with antibiotics, or provide nutrients for microbial growth.
Which of the following symptoms is most characteristic of a client with lung cancer?
- A. exertional dyspnea
- B. persistent changing cough
- C. air hunger; dyspnea
- D. cough with night sweats
Correct Answer: B
Rationale: The most characteristic symptom of lung cancer is a persistent changing cough. This cough may worsen over time and may produce blood-tinged sputum. Exertional dyspnea (Choice A) is more common in chronic obstructive pulmonary disease (COPD) due to airway obstruction. Air hunger and dyspnea (Choice C) are more typical of conditions like asthma. Cough with night sweats (Choice D) is commonly associated with tuberculosis rather than lung cancer.
A 22-year-old patient in a mental health lock-down unit under suicide watch appears happy about being discharged. Which of the following is probably happening?
- A. The patient is excited about being around family again.
- B. The patient's suicide plan has probably progressed.
- C. The patient's plans for the future have been clarified.
- D. The patient's mood is improving.
Correct Answer: B
Rationale: In this scenario, it is concerning that a patient under suicide watch is happy about being discharged as it may indicate that the patient's suicide plan has advanced. This change in behavior should be taken seriously as it can signal an increased risk of self-harm. Choices A, C, and D are less likely as the patient's happiness about discharge in this context is more indicative of a worsening situation rather than positive outcomes like being around family, clarifying future plans, or improving mood.
A patient had a pneumonectomy to the right lung performed 48 hours ago. Which of the following conditions most likely exists?
- A. Decreased breath sound volume
- B. Elevated tidal volume
- C. Elevated respiratory capacity
- D. Wheezing
Correct Answer: A
Rationale: After a pneumonectomy, where a lung is surgically removed, there will be a decrease in breath sound volume on the affected side due to reduced airflow. This reduction in breath sound volume is expected as there is less lung tissue to produce sound. Choices B, C, and D are incorrect. Elevated tidal volume and respiratory capacity are not expected after a pneumonectomy, and wheezing is more commonly associated with conditions like asthma or bronchitis, not a recent pneumonectomy.
A 46-year-old has returned from a heart catheterization and wants to get up to start walking 3 hours after the procedure. The nurse should:
- A. Tell the patient to remain with the leg straight for at least another hour and check the chart for activity orders.
- B. Allow the patient to begin limited ambulation with assistance.
- C. Recommend a physical therapy consultation for ambulation.
- D. Tell the patient to remain with the leg straight for another 6 hours and check the chart for activity orders.
Correct Answer: A
Rationale: The correct answer is to tell the patient to remain with the leg straight for at least another hour after a heart catheterization before starting ambulation. This period allows for proper healing and reduces the risk of complications such as bleeding or hematoma formation at the catheter insertion site. Starting ambulation too soon can disrupt the healing process and lead to adverse events. Choice B is incorrect because limited ambulation should not be initiated shortly after the procedure as it may increase the risk of complications. Choice C is incorrect as physical therapy consultation is not typically necessary for initial ambulation post-heart catheterization; this can be managed by nursing staff. Choice D is incorrect as keeping the leg straight for 6 hours is excessive and unnecessary, potentially leading to complications such as deep vein thrombosis due to prolonged immobility.