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Which is the cervical exam that most indicates the use of misoprostol?
- A. 1 cm dilated, 20% effaced, -3 station, firm and posterior
- B. 3-4 cm dilated, 50% effaced, -2 station, firm and midposition
- C. 5 cm dilated, 80% effaced, 0 station, soft and midposition
- D. 6 cm dilated, 100% effaced, +1 station, soft and anterior
Correct Answer: A
Rationale: The correct answer is A: 1 cm dilated, 20% effaced, -3 station, firm and posterior. Misoprostol is commonly used for cervical ripening in preparation for labor induction. This choice indicates an unfavorable cervix, which would benefit from cervical ripening agents like misoprostol. The cervix is minimally dilated (1 cm), partially effaced (20%), high (-3 station), firm, and posterior. This profile suggests that the cervix is not yet ripe and may require assistance in ripening for labor induction.
Choice B: 3-4 cm dilated, 50% effaced, -2 station, firm and midposition - this indicates a more favorable cervix for labor and would not typically require misoprostol for cervical ripening.
Choice C: 5 cm dilated, 80% effaced, 0 station, soft and midposition - this indicates an even more favorable cervix for labor,
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The nurse who elects to practice in the area of obstetrics often hears discussion regarding the four Ps. What are the four Ps that interact during childbirth? (Select all that apply.)
- A. Powers
- B. Passage
- C. Position
- D. Passenger
Correct Answer: A
Rationale: The correct answer is A: Powers. In obstetrics, the four Ps that interact during childbirth are Powers (contractions), Passage (birth canal), Passenger (fetus), and Psyche (mother's psychological state). Powers refer to the force generated by contractions to push the baby through the birth canal. Passage is the route the baby takes during birth. Passenger is the baby itself. Position is not one of the four Ps in childbirth. It is crucial for nurses in obstetrics to understand how these four Ps work together to facilitate a safe and successful delivery.
A 40-year-old G2, P1 woman is admitted to the labor and delivery unit with contractions 6 minutes apart. She is 36 weeks pregnant, has a history of placenta previa, and is currently experiencing moderate vaginal bleeding. What should the nurse be prepared to do?
- A. Perform a vaginal examination to determine cervical dilation
- B. Assist the health care provider to perform artificial rupture of the membranes
- C. Initiate external fetal monitoring
- D. Encourage patient to ambulate to intensify labor
Correct Answer: C
Rationale: The correct answer is C: Initiate external fetal monitoring. The nurse should initiate external fetal monitoring to assess the fetus's heart rate and uterine contractions, given the patient's history of placenta previa and vaginal bleeding. This helps to monitor the well-being of the fetus and detect any signs of distress. Performing a vaginal examination (Choice A) may aggravate the placenta previa and increase the risk of bleeding. Artificial rupture of membranes (Choice B) is contraindicated in cases of placenta previa due to the risk of increased bleeding. Encouraging ambulation (Choice D) is not advisable in this situation as it may also worsen bleeding.
When caring for a woman with a complete placenta previa, which finding should the nurse report to the physician?
- A. BP of 95/60
- B. Temperature of 100.1°F
- C. Urine output of 40 mL/hour
- D. O2 saturation less that 95%
Correct Answer: D
Rationale: The correct answer is D: O2 saturation less than 95%. In placenta previa, there is a risk of maternal hemorrhage, which can lead to decreased oxygen delivery to tissues. Reporting low O2 saturation is crucial as it indicates potential hypoxia, necessitating immediate intervention. Choice A (BP of 95/60) may be within normal limits. Choice B (Temperature of 100.1°F) can indicate infection but is not directly related to placenta previa. Choice C (Urine output of 40 mL/hour) may reflect renal function but is not the priority in this situation.
A primigravida has just been examined. The examination revealed engagement of the fetal head. The nurse is aware that this means which of the following?
- A. The biparietal diameter of the fetal head is at the level of the ischial spines.
- B. The biparietal diameter of the fetal head is at –2 station.
- C. The fetal head is well flexed.
- D. The fetal head is unable to pass under the pubic arch.
Correct Answer: A
Rationale: The correct answer is A: The biparietal diameter of the fetal head is at the level of the ischial spines. Engagement of the fetal head occurs when the largest transverse diameter of the presenting part (usually the biparietal diameter) reaches or passes through the pelvic inlet, specifically at the level of the ischial spines. This signifies descent of the fetal head into the maternal pelvis, indicating progress towards labor.
Choice B (The biparietal diameter of the fetal head is at –2 station) is incorrect as station refers to the level of the presenting part in relation to the ischial spines, not engagement.
Choice C (The fetal head is well flexed) is incorrect as engagement does not necessarily indicate the position of the fetal head.
Choice D (The fetal head is unable to pass under the pubic arch) is incorrect as engagement actually signifies that the fetal head is in the optimal position to pass through the pelvis during labor.
Which mechanism of labor occurs when the largest diameter of the fetal presenting part passes the pelvic inlet?
- A. Extension
- B. Engagement
- C. Internal rotation
- D. External rotation
Correct Answer: B
Rationale: The correct answer is B: Engagement. Engagement occurs when the largest diameter of the fetal presenting part (usually the biparietal diameter of the fetal head) passes through the pelvic inlet. This marks the beginning of the descent of the fetal head into the pelvis in preparation for birth. Extension (A) refers to the movement of the fetal head as it passes through the birth canal. Internal rotation (C) is the movement of the fetal head to align with the maternal pelvis. External rotation (D) occurs as the fetal head exits the birth canal.