Chapter 12: Processes of Birth Foundations of Maternal-Newborn & Women’s Health Nursing, 7th Edition. questions and correct answers explained

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1. The nurse is explaining the physiology of uterine contractions to a group of nursing students. Which statement best explains the maternal-fetal exchange of oxygen and waste products during a cont... raction? a. Little to no affect b. Increases as blood pressure decreases c. Diminishes as the spiral arteries are compressed d. Continues except when placental functions are reduced ANS: C During labor contractions, the maternal blood supply to the placenta gradually stops as the spiral arteries supplying the intervillous space are compressed by the contracting uterine muscle. The exchange of oxygen and waste products is affected by contractions. The exchange of oxygen and waste products decreases. The maternal blood supply to the placenta gradually stops with contractions. DIF: Cognitive Level: Application OBJ: Nursing Process Step: Implementation MSC: Patient Needs: Physiologic Integrity 2. The nurse is directing an unlicensed assistive personnel (UAP) to obtain maternal vital signs between contractions. Which statement is the appropriate rationale for assessing maternal vital signs between contractions rather than at another interval? a. Vital signs taken during contractions are inaccurate. b. During a contraction, assessing fetal heart rate is the priority. c. Maternal blood flow to the heart is reduced during contractions. d. Maternal circulating blood volume increases temporarily during contractions. ANS: D During uterine contractions, blood flow to the placenta temporarily stops, causing a relative increase in the mother’s blood volume, which in turn temporarily increases blood pressure and slows the pulse. Vital signs are altered by contractions but are considered accurate for a period of time. It is important to monitor the fetal response to contractions, but the question is concerned with the maternal vital signs. Maternal blood flow is increased during a contraction. DIF: Cognitive Level: Application OBJ: Nursing Process Step: Implementation MSC: Patient Needs: Safe and Effective Care Environment 3. Uncontrolled maternal hyperventilation during labor results in a. metabolic acidosis. b. metabolic alkalosis. c. respiratory acidosis. d. respiratory alkalosis. ANS: D [Show More]

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