A nurse is caring for a client who is pregnant and Rh-negative. The nurse should plan to monitor which of the following maternal laboratory test results to determine maternal-fetal blood incompatibility?

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.

Verapamil is a calcium channel blocker that can lower the heart rate and blood pressure. A normal pulse rate for adults is between 60 and 100 beats per minute. A pulse rate of 48/min is too low and indicates bradycardia, which can cause dizziness, fainting, or cardiac arrest. Verapamil should not be given to patients with bradycardia or heart block.

Choice A is wrong because blood pressure 170/82 mm Hg is high and verapamil can help lower it. A normal blood pressure for adults is less than 120/80 mm Hg.

Choice B is wrong because respiratory rate 18/min is normal and verapamil does not affect it. A normal respiratory rate for adults is between 12 and 20 breaths per minute.

Choice D is wrong because potassium 4 mEq/L is normal and verapamil does not affect it. A normal potassium level for adults is between 3.5 and 5.0 mEq/L.