Correct Answer: B

Rationale: The client scheduled for a pericentesis should be instructed to empty the bladder to prevent the risk of bladder puncture when the needle is inserted. A pericentesis involves removing fluid from the peritoneal cavity. The client is typically positioned sitting up or leaning over a table, making answer A incorrect. During a pericentesis, the client is usually awake, so answer C is incorrect. Medications are not commonly injected into the peritoneal cavity during this procedure, making answer D incorrect. However, it's important to note that the administration of medications during the procedure could vary based on specific circumstances.

Correct Answer: B

Rationale: Choice B is the best response as it provides empathy and encourages the client to talk about her experience, which can be therapeutic. This approach validates the client's feelings and offers support. By acknowledging the difficulty and fear experienced by the client, the nurse opens the door for the client to express her emotions and begin the process of coping with the trauma. Choices A, C, and D do not address the emotional impact of the traumatic event or provide an opportunity for the client to express her feelings and concerns. Choice A immediately jumps to medication without exploring other supportive interventions. Choice C focuses on practical solutions without addressing the client's emotional needs. Choice D suggests a drastic solution without considering the client's emotional state or preferences.

Correct Answer: A

Rationale: AST, choice A, would be the least effective in diagnosing a myocardial infarction as it is not specific for this condition. Troponin, CK-MB, and myoglobin (choices B, C, and D) are more specific markers for myocardial infarction. Troponin is considered the gold standard due to its cardiac specificity. CK-MB is also specific to the heart, and its isoenzyme levels elevate post-heart damage. Myoglobin, although elevated in myocardial infarction, is not as specific as troponin and CK-MB and can also increase in conditions like burns and muscle trauma. Therefore, AST is the least effective choice for diagnosing a myocardial infarction.

Correct Answer: B

Rationale: The correct answer is B: Denial. The client displaying denial refuses to acknowledge the reality of having a myocardial infarction. Rationalization (choice A) involves making excuses for behavior, not denying a condition. Projection (choice C) is attributing one's thoughts or feelings to others, not denying an illness. Conversion reaction (choice D) is converting psychological distress into physical symptoms, which is not evident in this scenario. Therefore, denial is the defense mechanism being used in this situation.

Correct Answer: A

Rationale: During a Tensilon test to check for Myasthenia Gravis, Atropine sulfate should be kept available as it is the antidote for Tensilon and is administered to manage cholinergic crises that may occur during the test. Atropine sulfate helps counteract the excessive stimulation of the parasympathetic nervous system caused by Tensilon. Furosemide (choice B) is a diuretic and not related to managing Tensilon-induced crises. Prostigmin (choice C) is used to treat Myasthenia Gravis itself, not for managing the effects of Tensilon. Promethazine (choice D) is an antiemetic and antianxiety agent, which is not necessary for a Tensilon test. Therefore, Atropine sulfate (choice A) is the correct medication to have available during a Tensilon test, making choices B, C, and D incorrect in this context.