The nurse is applying erythromycin ointment to the lower lid of the newborn’s eyes. What is the purpose of this medication for the newborn?

Choice A rationale:

Erythromycin ointment does not have moisturizing properties. Its primary function is to act as an antibiotic to prevent bacterial infections.

While it may have a slightly lubricating effect due to its ointment base, this is not its intended purpose.

If moisture is the primary goal, artificial tears or other ophthalmic lubricants would be more appropriate choices.

Choice B rationale:

Chemical conjunctivitis is typically caused by irritants such as chlorine, smoke, or chemicals, not bacteria. Erythromycin is not effective in preventing or treating chemical conjunctivitis.

Treatment for chemical conjunctivitis usually involves flushing the eyes with saline or water and applying cool compresses, as well as potentially using topical antihistamines or corticosteroids to reduce inflammation.

Choice D rationale:

Erythromycin ointment is not typically used to treat active eye infections in newborns.

While it can be used for this purpose in certain cases, it is more commonly used as a prophylactic measure to prevent infections from developing in the first place.

If a newborn has a suspected eye infection, a healthcare provider would likely collect a sample of discharge for testing and culture to determine the specific causative organism and select the most appropriate antibiotic treatment.

Choice C rationale:

The primary purpose of applying erythromycin ointment to a newborn's eyes is to prevent bacterial eye infections, specifically ophthalmia neonatorum.

Ophthalmia neonatorum is a serious condition that can lead to vision loss if not treated promptly.

It is most commonly caused by the bacteria Neisseria gonorrhoeae and Chlamydia trachomatis, which can be transmitted to the newborn during childbirth if the mother is infected.

Erythromycin ointment is effective in preventing these infections by killing or inhibiting the growth of these bacteria. It is typically applied to the newborn's eyes within 1 hour of birth as a standard practice in many countries.

Choice A rationale:

Hypertension is not a primary contraindication for mannitol use. While it's important to monitor blood pressure during mannitol administration, it's not the most concerning factor in this scenario.

Mannitol can even be used cautiously in hypertensive patients with conditions like intracranial hypertension or acute renal failure, where its benefits may outweigh the potential risks of exacerbating hypertension.

Choice B rationale:

Mannitol is actually indicated for the treatment of increased intracranial pressure (ICP). It works by drawing fluid from the brain tissues into the bloodstream, thereby reducing pressure within the skull.

Therefore, a patient with ICP would not be a concern for mannitol administration; rather, they would be a potential candidate for its use.

Choice D rationale:

While fluid volume overload can be a concern with mannitol use, it's typically managed with careful monitoring and fluid restriction.

The more significant concern in this scenario is congestive heart failure (CHF).

Choice C rationale:

Mannitol is contraindicated in patients with congestive heart failure (CHF). Here's why:

Increased Circulating Volume: Mannitol is an osmotic diuretic, meaning it draws fluid from the tissues into the bloodstream, increasing circulating blood volume. This can overload the already compromised heart in CHF patients, leading to worsening heart failure and pulmonary edema.

Elevated Blood Pressure: Mannitol can also cause a transient increase in blood pressure due to its osmotic effects. This can further strain the heart and worsen CHF symptoms.

Renal Impairment: CHF patients often have impaired renal function, which can reduce their ability to excrete mannitol effectively. This can lead to fluid retention and electrolyte imbalances, further complicating CHF management.

In summary, administering mannitol to a patient with CHF could potentially lead to:

Exacerbation of heart failure symptoms Pulmonary edema

Worsening renal function Electrolyte imbalances Increased risk of mortality

Therefore, it's crucial to avoid mannitol use in patients with CHF and to closely monitor fluid status and electrolytes in those who must receive it for other indications.