An adolescent client will receive Depo-Provera as a method of birth control. She asks the nurse how long the drug will be effective. What is the best response by the nurse?

Correct Answer: D

Rationale: Depo-Provera, a progestin injection, provides contraception by inhibiting ovulation for 3 months , requiring re-administration every 12 weeks. This duration is based on its pharmacokinetic profile, ensuring reliable hormone levels. Two months underestimates, risking unprotected gaps. Six months or 1 year overestimate, reducing efficacy mid-cycle. The nurse's accurate response (D) educates the client on timing, ensuring adherence and preventing unintended pregnancy, aligning with clinical standards for injectable contraceptives.

Correct Answer: A

Rationale: Morphine overdose is a medical emergency that can result in respiratory depression and potentially lead to death. Naloxone is a medication used to counteract the effects of opioids like morphine by binding to the same receptors in the brain and reversing the respiratory depression. Naloxone works quickly to restore normal breathing and consciousness in individuals who have overdosed on morphine. It is a critical intervention used to prevent fatal outcomes of opioid overdose, including morphine. Other options like Vitamin K, time, and grapefruit juice are not effective treatments for morphine overdose.

Correct Answer: A

Rationale: Cleaning equipment between each enteral feeding is vital to prevent bacterial contamination, as residual formula can foster microbial growth, risking infections like gastroenteritis in a client already nutritionally compromised. While limiting hang time is important, evidence suggests a 4-hour maximum, not 8, to minimize spoilage-though this isn't the focus here. Refrigerating unused feeding preserves its integrity, preventing degradation or bacterial proliferation, which is critical for safety. Keeping the insertion site clean reduces infection risk at the tube entry, a common complication in enteral therapy. Cleaning equipment stands out as a proactive step the wife can take between feedings, directly impacting hygiene and client safety, whereas other points address storage or site care, which, while essential, are secondary to the immediate post-feeding action of equipment maintenance in this context.

Correct Answer: A

Rationale: The percentage of ionization of a weak acid or base can be estimated using the Henderson-Hasselbalch equation:

Correct Answer: A

Rationale: Acyclovir can cause nephrotoxicity, so monitoring blood urea nitrogen (BUN) and creatinine levels is essential. Hypertension is not a common side effect of acyclovir. Intravenous acyclovir should be administered over at least 1 hour to prevent renal toxicity. Adequate fluid intake helps prevent crystalluria and nephrotoxicity.