A nurse at a pediatric clinic is checking the vital signs of a 2-week-old infant. Which of the following findings is outside of the expected reference range?

Keep your environment well ventilated. This can help reduce nausea and vomiting by eliminating odors that might trigger them.

Some additional explanations are:

Choice B is wrong because eating three large meals each day can increase nausea and vomiting by overloading the stomach. It is better to eat small, frequent meals and avoid spicy, greasy, or strong-smelling foods.

Choice C is wrong because restricting intake of high-carbohydrate foods can lead to ketosis, which can worsen nausea and vomiting. High-carbohydrate foods can also help settle the stomach and provide energy.

Choice D is wrong because brushing your teeth immediately after eating can stimulate the gag reflex and cause nausea and vomiting. It is better to rinse your mouth with water or mouthwash after eating and brush your teeth at least an hour later.

Normal ranges for nausea and vomiting in pregnancy are:

• Nausea and vomiting usually start around 6 weeks of gestation and peak around 9 weeks. They usually subside by 16 to 20 weeks, but some women may experience them throughout pregnancy.
• Nausea and vomiting are considered mild if they do not interfere with daily activities or nutrition. They are considered moderate if they cause some difficulty with daily activities or nutrition. They are considered severe if they prevent adequate intake of fluids and nutrients, cause weight loss, dehydration, electrolyte imbalance, or ketonuria.
• Nausea and vomiting that are severe or persist beyond 20 weeks of gestation may indicate a complication such as hyperemesis gravidarum, molar pregnancy, multiple gestation, or infection.

The indirect Coombs test is used to detect antibodies against foreign red blood cells in the maternal serum. This test can help identify maternal-fetal blood incompatibility, which can cause hemolytic disease of the newborn.

Choice A is wrong because homocysteine is a type of amino acid and is not related to blood compatibility.

Choice C is incorrect because erythropoietin is a hormone that regulates red blood cell production and is not a specific test for detecting maternal-fetal blood incompatibility.

Choice D is not the correct answer as aPTT (activated partial thromboplastin time) is a test used to evaluate blood clotting factors and is not directly related to monitoring maternal-fetal blood incompatibility.