Correct Answer: B

Rationale: Pyridostigmine is the drug of choice for treating myasthenia gravis because it enhances communication between nerves and muscles by inhibiting acetylcholinesterase. Methotrexate (choice A) is not indicated for myasthenia gravis but is used in conditions like rheumatoid arthritis. Baclofen (choice C) is a muscle relaxant used for conditions like spasticity. Atropine (choice D) is not typically used in myasthenia gravis as it can worsen muscle weakness.

Correct Answer: C

Rationale: The correct answer is to provide standby assistance when the client gets out of bed. Lisinopril can cause hypotension, especially after the first dose, which can lead to dizziness and falls. Standby assistance helps prevent potential injury. Placing the client on cardiac monitoring (choice A) or monitoring oxygen saturation (choice B) are not typically necessary after the first dose of lisinopril unless specific symptoms are present. Encouraging foods high in potassium (choice D) is not directly related to the immediate concern of postural hypotension associated with lisinopril.

Correct Answer: C

Rationale: Elevating the affected leg is a crucial intervention in the care of a client with deep vein thrombosis (DVT). This position helps reduce swelling and promotes venous return, which can alleviate symptoms associated with DVT. Applying ice packs (Choice A) may worsen the condition by causing vasoconstriction. Encouraging ambulation (Choice B) can dislodge the clot and lead to fatal complications. Massaging the affected area (Choice D) can also dislodge the clot and is contraindicated in DVT.

Correct Answer: A

Rationale: The correct answer is to wear an N95 respirator mask when caring for the client with TB. This is crucial to prevent the nurse from inhaling the airborne particles that spread the infection. Choice B is incorrect because placing the client in a semi-private room does not address the protection of the nurse. Choice C is incorrect as having the client wear a surgical mask during meals is not sufficient to protect the nurse during all interactions. Choice D is incorrect as using a negative pressure air filtration system is more applicable to airborne infection isolation rooms in healthcare settings and not a standard intervention for nurses caring for a single client with TB.

Correct Answer: A

Rationale: The correct answer is A: Decreased deep tendon reflexes. In a client receiving magnesium sulfate for preeclampsia, decreased deep tendon reflexes indicate magnesium toxicity. Magnesium toxicity can lead to respiratory depression and other serious complications, requiring immediate intervention. Choices B, C, and D are incorrect because increased blood pressure, tachypnea, and hyperreflexia are not typical findings associated with magnesium toxicity.