The maternity nurse understands that vascular volume increases 40% to 45% during pregnancy to:
compensate for decreased renal plasma flow.
prevent maternal and fetal dehydration.
provide adequate perfusion of the placenta.
eliminate metabolic wastes of the mother.
The Correct Answer is C
Choice A reason: Vascular volume increases during pregnancy to meet the increased oxygen and nutrient demands of the fetus, not to compensate for decreased renal plasma flow. In fact, renal plasma flow increases by 50% to 80% during pregnancy to facilitate the excretion of metabolic wastes.
Choice B reason: Vascular volume increases during pregnancy to ensure adequate blood supply to the uterus and other organs, not to prevent maternal and fetal dehydration. Dehydration can occur due to vomiting, diarrhea, or inadequate fluid intake, and it can be prevented by drinking enough fluids and replacing electrolytes.
Choice C reason: Vascular volume increases during pregnancy to provide adequate perfusion of the placenta, which is the main organ of gas exchange and nutrient delivery for the fetus. The placenta receives about 10% of the maternal cardiac output at term.
Choice D reason: Vascular volume increases during pregnancy to support the growth and development of the fetus and the maternal tissues, not to eliminate metabolic wastes of the mother. Metabolic wastes are eliminated by the kidneys, lungs, skin, and gastrointestinal tract.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A reason: Syphilis is a bacterial STI caused by Treponema pallidum. It is characterized by three stages: primary, secondary, and tertiary. It can cause serious complications such as neurosyphilis, cardiovascular syphilis, and congenital syphilis. However, it is not the most common bacterial STI.
Choice B reason: Candidiasis is a fungal infection caused by Candida albicans. It is not a STI, but rather an opportunistic infection that can affect the vagina, mouth, skin, or other mucous membranes. It can cause symptoms such as itching, burning, discharge, and inflammation.
Choice C reason: Gonorrhea is a bacterial STI caused by Neisseria gonorrhoeae. It can infect the urethra, cervix, rectum, throat, or eyes. It can cause symptoms such as dysuria, discharge, pelvic pain, and bleeding. It can also lead to complications such as pelvic inflammatory disease, epididymitis, infertility, and disseminated gonococcal infection. However, it is not the most common bacterial STI.
Choice D reason: Chlamydia is a bacterial STI caused by Chlamydia trachomatis. It is the most common bacterial STI, affecting about 2.86 million people in the United States in 2018. It can infect the urethra, cervix, rectum, throat, or eyes. It can cause symptoms such as dysuria, discharge, pelvic pain, and bleeding. It can also lead to complications such as pelvic inflammatory disease, epididymitis, infertility, and ectopic pregnancy.
Correct Answer is C
Explanation
Choice A reason: A sleepy, sedated affect is not a concerning sign, as it is a common side effect of magnesium sulfate. Magnesium sulfate is a central nervous system depressant that can cause drowsiness, lethargy, and reduced alertness.
Choice B reason: Absent ankle clonus is not a concerning sign, as it indicates a normal neuromuscular response. Ankle clonus is a rhythmic jerking of the foot when the ankle is dorsiflexed. It is a sign of hyperreflexia, which can occur in severe preeclampsia due to increased blood pressure and cerebral edema.
Choice C reason: A respiratory rate of 10 breaths/min is a concerning sign, as it indicates respiratory depression. This is a serious complication of magnesium sulfate toxicity, which can lead to respiratory arrest and death. The nurse should monitor the woman's respiratory rate closely and report any signs of respiratory distress.
Choice D reason: Deep tendon reflexes of 2+ are not a concerning sign, as they indicate a normal neuromuscular response. Deep tendon reflexes are graded from 0 to 4, with 2 being the average. Magnesium sulfate can cause hyporeflexia or areflexia, which are signs of magnesium sulfate toxicity.
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