A nurse is teaching the guardian of a newborn about car seat safety. Which of the following statements by the guardian indicates an understanding of the teaching?

A. "You should wear a snug-fitting bra continuously for 72 hours": Wearing a snug-fitting bra continuously for 72 hours can help suppress lactation by providing support and reducing stimulation to the breasts. This can help prevent milk production and engorgement.
B. "You should apply moist heat to your breasts four times per day": Moist heat can stimulate milk production and should be avoided when trying to suppress lactation.
C. "You should limit your fluid intake to 1 liter per day": Adequate hydration is important for overall health, and limiting fluid intake to 1 liter per day is not advisable, especially postpartum when hydration needs may be higher.
D. "You should manually express milk when engorgement occurs": Manual expression of milk can stimulate milk production and should be avoided when attempting to suppress lactation. If engorgement occurs, cold compresses or ice packs can be used to reduce discomfort without stimulating milk production.

A. Hearing loss: While digoxin toxicity can affect various organ systems, including the auditory system, resulting in symptoms such as tinnitus (ringing in the ears), hearing loss is not a typical manifestation of digoxin toxicity.
B. Insomnia: Insomnia is not a common symptom of digoxin toxicity. Clients with digoxin toxicity are more likely to experience neurological symptoms such as confusion, visual disturbances, or changes in mental status.
C. Tachycardia: Digoxin toxicity can cause arrhythmias, but it typically presents with bradycardia rather than tachycardia. Bradycardia is a hallmark sign of digoxin toxicity due to its negative chronotropic effect on the heart.
D. Blurred vision: Blurred or yellow-tinted vision is a classic symptom of digoxin toxicity, often described as "yellow halos" around lights. Visual disturbances occur due to the drug's effects on the optic nerve and can progress to more severe manifestations, such as changes in color vision or photophobia. Therefore, blurred vision is a key indicator of digoxin toxicity and requires prompt assessment and intervention.