Correct Answer: C

Rationale: Erythromycin eye ointment is the medication of choice for preventing ophthalmia neonatorum, an eye infection in newborns caused by exposure to gonorrhea or chlamydia during birth. Erythromycin helps prevent the transmission of these bacteria from the mother to the baby during delivery, protecting the newborn's eyes from potential infection. Ofloxacin, Nystatin, and Ceftriaxone are not indicated for preventing ophthalmia neonatorum. Ofloxacin is a fluoroquinolone antibiotic used for treating eye infections in adults, Nystatin is an antifungal medication used for fungal infections, and Ceftriaxone is a cephalosporin antibiotic used for various bacterial infections, but not for preventing ophthalmia neonatorum.

Correct Answer: B

Rationale: The correct answer is B. A continuous high-pitched cry is a characteristic sign of neonatal abstinence syndrome, indicating withdrawal from drugs. Choices A, C, and D are incorrect because decreased muscle tone, sleeping for 2 to 3 hours after a feeding, and mild tremors when disturbed are not specific indicators of neonatal abstinence syndrome.

Correct Answer: C

Rationale: The nurse should interpret this data as a normal postpartum discharge of lochia. Lochia is the normal vaginal discharge after childbirth, and the gush of dark red blood upon ambulation is typical due to the pooling of blood in the vagina when lying down, which is then released upon standing. The firm, midline uterus at the level of the umbilicus indicates normal involution of the uterus postpartum. Therefore, this scenario is consistent with the expected postpartum physiological changes rather than complications like hematoma, lacerations, or abnormal excessive bleeding. Choices A, B, and D are incorrect because the described findings are more indicative of normal postpartum processes rather than complications such as vaginal hematoma, lacerations, or excessive bleeding.

Correct Answer: D

Rationale: A displaced and boggy fundus in a postpartum client typically indicates a full bladder, which can impede uterine contractions and increase the risk of postpartum hemorrhage. Assisting the client to the bathroom to void helps ensure the bladder is empty, aiding the fundus to contract and reducing the risk of complications. Encouraging Kegel exercises, changing positions, or assessing pain would not directly address the issue of the boggy fundus caused by a full bladder.

Correct Answer: B

Rationale: The correct answer is B because the client needs a second varicella vaccination at the postpartum visit to ensure immunity. Option A is incorrect as it implies a future need for a second vaccination without a clear action plan. Option C is incorrect as the varicella vaccine is primarily for the client's protection, not others. Option D is not the appropriate action as waiting to be tested for immunity delays the necessary second vaccination.