With regard to systemic analgesics administered during labor, nurses should be aware that:
Systemic analgesics cross the maternal blood-brain barrier as easily as they do the fetal blood-brain barrier.
Effects on the fetus and newborn can include decreased alertness and delayed sucking
Intravenous (IV) patient-controlled analgesia (PCA) results in increased use of an analgesic
Intramuscular (M) administration is preferred over IV administration
The Correct Answer is B
A. Systemic analgesics cross the maternal blood-brain barrier as easily as they do the fetal blood-brain barrier. While systemic analgesics do cross the placenta, they actually affect the fetus more readily than the mother because the fetal liver and kidneys are immature, making drug metabolism and excretion slower. This leads to prolonged effects on the newborn.
B. Effects on the fetus and newborn can include decreased alertness and delayed sucking. Opioid analgesics, such as fentanyl, meperidine, or morphine, can cause neonatal respiratory depression, reduced alertness, and difficulty initiating breastfeeding due to delayed sucking reflex. If administered too close to delivery, the newborn may require respiratory support or naloxone to reverse opioid effects.
C. Intravenous (IV) patient-controlled analgesia (PCA) results in increased use of an analgesic. PCA allows controlled dosing of pain medication, often leading to less total medication use because the patient receives smaller, more frequent doses rather than large, single doses. This helps maintain stable pain control without excessive sedation.
D. Intramuscular (IM) administration is preferred over IV administration. IV administration is preferred over IM because it provides faster pain relief and better dose control. IM injections have delayed absorption and an unpredictable effect, making IV the preferred route for labor analgesia.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. "An ectopic pregnancy does not need major treatment and can be delivered vaginally." This statement is incorrect. An ectopic pregnancy involves the fertilized ovum implanting outside the uterus, most commonly in a fallopian tube, which poses serious risks to the mother. The pregnancy cannot be carried to term, and it requires prompt medical intervention, such as medication or surgery, to prevent life-threatening complications.
B. "An ectopic pregnancy involves a fertilized ovum outside the uterus that cannot be transferred to the uterus." This is an accurate explanation of an ectopic pregnancy. The fertilized egg implants outside the uterus, most commonly in the fallopian tubes, and cannot develop into a viable pregnancy. The condition requires immediate treatment to prevent tube rupture and internal bleeding.
C. "An ectopic pregnancy involves a cancerous fertilized ovum in either fallopian tube." This is incorrect. An ectopic pregnancy is not cancerous. It refers to a pregnancy where the fertilized ovum implants in an abnormal location outside the uterus, most commonly the fallopian tubes, not involving cancerous growth.
D. "An ectopic pregnancy involves a fertilized ovum in the vagina." This statement is incorrect. An ectopic pregnancy occurs when the fertilized ovum implants outside the uterus, but it does not implant in the vagina. The condition most commonly involves the fallopian tubes but can also occur in other locations such as the cervix, ovary, or abdominal cavity.
Correct Answer is D
Explanation
A. No action is necessary since a decrease in the woman's blood pressure is expected. While a drop in blood pressure is a common side effect of a spinal block, a 20% decrease is significant and can compromise placental perfusion, leading to fetal distress. Intervention is necessary to restore circulation.
B. Decrease her intravenous (IV) rate to a keep vein-open rate. This is incorrect because IV fluids help counteract hypotension. Instead of decreasing the IV rate, the nurse may need to increase fluid administration to improve blood pressure and maintain perfusion.
C. Encourage her to empty her bladder. A full bladder can affect labor progression but does not directly cause or correct hypotension. The priority in this scenario is restoring blood pressure to ensure adequate fetal oxygenation.
D. Turn the woman to the left lateral position or place a pillow under her hip. This is the most appropriate intervention. A left lateral position or elevating her right hip helps relieve aortocaval compression, improving blood flow to the uterus and stabilizing blood pressure. Additional interventions, such as IV fluid boluses or vasopressors (e.g., ephedrine), may be needed if hypotension persists.
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