Correct Answer: B

Rationale: The correct answer is troponin. Troponin levels are the most specific and sensitive markers for myocardial infarction, and they begin to rise within a few hours after the event. CPK, SGOT, and LDH are also enzymes that can indicate myocardial damage, but troponin is the earliest and most specific indicator. CPK typically rises 4-8 hours after an infarction, followed by SGOT (AST) at 8-12 hours, and LDH at 12-24 hours post-infarction.

Correct Answer: A

Rationale: The correct answer is 'specific.' Specificity refers to the ability of a test to correctly identify individuals who do not have a particular disease. In this case, when the client's lab culture report is negative for the suspected infection, a specific test would correctly identify that the client does not have the disease. 'Sensitive' (Choice B) is incorrect as sensitivity refers to the ability of a test to correctly identify individuals who do have the disease. 'Negative culture' (Choice C) is incorrect as it does not describe the test's ability but rather the result itself. 'Marginal finding' (Choice D) is irrelevant to the concept being tested in this question.

Correct Answer: A

Rationale: The nurse's actions of providing an analgesic medication and darkening the room aim to decrease stimuli from the cerebral cortex. Reduction of environmental stimuli, especially light and noise, from the cerebral cortex, which is an area of arousal, facilitates sleep. By decreasing input to this area, the client is more likely to fall asleep and stay asleep. Choices B, C, and D are incorrect because the scenario does not involve stimulating hormonal changes, influencing the circadian rhythm, or alerting the hypothalamus.

Correct Answer: D

Rationale: The correct answer is tendon rupture. Floxin is a quinolone antibiotic commonly used in respiratory infections and pelvic/reproductive infections. One of the rare adverse effects associated with quinolones is tendon sheath rupture, often affecting the Achilles tendon. Therefore, patients taking Floxin should be alerted to the possibility of tendon rupture. Choices A, B, and C are incorrect as they are not typically associated with Floxin use and are not common adverse effects of quinolone antibiotics. Stunting of height is not a recognized adverse effect of Floxin. Anovulatory uterine bleeding is not a known side effect of quinolones. Intractable diarrhea is not a common adverse effect of Floxin.

Correct Answer: D

Rationale: The correct answer is developing interventions for grief and loss. In this scenario, the client's pain is not solely sensory but also affective due to grieving over the death of their spouse. It is essential to address the emotional component of pain by providing support and interventions for grief and loss. Referring the client for a psychiatric consult may not be necessary as grieving is a normal response to such a significant loss. Calling the physician for an increased dosage of pain medication or a sedative solely focuses on the sensory aspect of pain and does not address the underlying emotional distress.