In a client's seventh month of pregnancy, she reports feeling "dizzy, like I'm going to pass out, when I lie down flat on my back". The nurse explains that this is due to:
Select one:
Physiologic anemia due to maternal increased plasma volume.
Pressure of the gravid uterus on the maternal inferior vena cava and aorta.
Pressure of the presenting fetal part on the maternal diaphragm.
A 50% increase in maternal blood volume during pregnancy.
The Correct Answer is B
Choice A Reason: Physiologic anemia due to maternal increased plasma volume. This is an incorrect answer that refers to a different condition that affects hemoglobin levels, not blood pressure. Physiologic anemia is a condition where the maternal plasma volume increases more than the red blood cell mass during pregnancy, which dilutes the hemoglobin concentration and lowers the hematocrit value. Physiologic anemia does not cause significant symptoms or complications in pregnant women, as it is an adaptive mechanism that enhances oxygen delivery and prevents fluid overload.
Choice B Reason: Pressure of the gravid uterus on the maternal inferior vena cava and aorta. This is because this statement explains the cause of supine hypotensive syndrome, which is a condition where lying flat on the back causes compression of the major blood vessels by the gravid uterus, which reduces venous return and cardiac output, which lowers blood pressure and perfusion to vital organs. Supine hypotensive syndrome can cause symptoms such as dizziness, lightheadedness, nausea, pallor, or syncope in pregnant women, especially in the third trimester.
Choice C Reason: Pressure of the presenting fetal part on the maternal diaphragm. This is an incorrect answer that indicates a different condition that affects respiratory function, not blood pressure. Pressure of the presenting fetal part on the maternal diaphragm is a result of cephalic engagement or lightening, which occurs when the fetal head descends into the pelvis and occupies more space in the abdominal cavity. Pressure of the presenting fetal part on the maternal diaphragm can cause symptoms such as dyspnea, heartburn, or rib pain in pregnant women.
Choice D Reason: A 50% increase in maternal blood volume during pregnancy. This is an incorrect answer that describes a normal physiological change that occurs during pregnancy, not a cause of supine hypotensive syndrome. A 50% increase in maternal blood volume during pregnancy is due to increased production of plasma and red blood cells, which helps meet the increased oxygen and nutrient demands of the fetus and placenta, and prepares the mother for blood loss during delivery. A 50% increase in maternal blood volume during pregnancy does not cause hypotension or dizziness in pregnant women.

Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A Reason: Daily weight. This is an incorrect answer that indicates a valid parameter to assess hydration status. Daily weight is a measure of the body mass that can reflect changes in fluid balance. Daily weight can help detect fluid loss or gain in premature infants, who are more prone to dehydration or overhydration due to immature renal function and high insensible water loss.
Choice B Reason: Consistency of stool. This is an incorrect answer that indicates a valid parameter to assess hydration status. Consistency of stool is a measure of the texture and form of feces that can reflect changes in fluid intake and absorption. Consistency of stool can help identify diarrhea or constipation in premature infants, who are more susceptible to gastrointestinal problems such as necrotizing enterocolitis or feeding intolerance.
Choice C Reason: Volume of urine output. This is an incorrect answer that indicates a valid parameter to assess hydration status. Volume of urine output is a measure of the amount of urine produced and excreted by the kidneys that can reflect changes in fluid balance and renal function. Volume of urine output can help monitor hydration status and kidney function in premature infants, who are more vulnerable to fluid overload or deficit and renal impairment.
Choice D Reason: Blood pH. This is because blood pH is a measure of the acidity or alkalinity of the blood, which reflects the balance between carbon dioxide and bicarbonate in the body. Blood pH is not a direct indicator of hydration status, which refers to the amount of water and electrolytes in the body. Hydration status can affect blood pH, but blood pH can also be influenced by other factors such as respiratory or metabolic disorders.

Correct Answer is D
Explanation
Choice A Reason: Moderate amounts of deep red lochia. This is not a finding that would warrant further investigation, but rather a normal finding for the early postpartum period. Lochia is the vaginal discharge that occurs after delivery, which consists of blood, mucus, and tissue from the uterus. Lochia is usually deep red in color and moderate in amount for the first few days after delivery.
Choice B Reason: Sweating while afebrile. This is not a finding that would warrant further investigation, but rather a common occurrence in the postpartum period. Sweating is a mechanism of thermoregulation that helps the body eliminate excess fluid and electrolytes that were retained during pregnancy. Sweating does not necessarily indicate fever or infection.
Choice C Reason: Voiding 350 mL of blood-tinged urine. This is not a finding that would warrant further investigation, but rather an expected outcome for the postpartum period. Voiding large amounts of urine is normal in the postpartum period, as the body eliminates the excess fluid that was accumulated during pregnancy. Blood-tinged urine may be due to trauma or irritation of the urinary tract during labor or delivery, which usually resolves within a few days.
Choice D Reason: Heart rate of 115 beats/minute. This is because a heart rate of 115 beats/minute is higher than the normal range for an adult, which is 60 to 100 beats/minute. A high heart rate may indicate postpartum hemorrhage, infection, pain, anxiety, or dehydration. The nurse should further assess the client for other signs and symptoms of these conditions and notify the physician if necessary.

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