- Which of the following is the most likely diagnosis?
Answer: Vasa previa
This is the classic presentation of vasa previa, where fetal vessels traverse the membranes over the cervical os. The triad of rupture of membranes followed by painless vaginal bleeding and acute fetal distress (severe bradycardia or decelerations) is pathognomonic. The bleeding is fetal in origin, leading to rapid exsanguination and compromise. Placental abruption is typically painful. Placenta previa bleeding is not precipitated by rupture of membranes. Uterine rupture presents with intense pain, loss of fetal station, and variable bleeding.
- Which of the following is the most appropriate initial management for this patient?
Answer: Diet and exercise modification
The patient's oral glucose tolerance test is diagnostic for gestational diabetes mellitus (GDM), with all four values exceeding the upper limit of normal (diagnosis requires at least two abnormal values). The initial and cornerstone of management for GDM is lifestyle modification, which includes dietary counseling (e.g., diabetic diet) and regular exercise. Pharmacologic therapy, such as insulin or metformin, is reserved for patients who fail to achieve glycemic control with diet and exercise alone. Repeating the test is unnecessary as the diagnosis is already established.
- What is the most definitive management for this patient's condition?
Answer: Delivery of the fetus.
The definitive treatment for preeclampsia is delivery of the placenta. For patients with preeclampsia with severe features, delivery is recommended at or after 34 0/7 weeks of gestation. Delivery is also indicated before 34 weeks if there is evidence of maternal or fetal instability, such as uncontrolled severe hypertension, eclampsia, pulmonary edema, or non-reassuring fetal status. Given her severe features at 30 weeks, delivery is the definitive management after initial maternal stabilization. Corticosteroids are given in anticipation of preterm delivery but do not treat the underlying disease. Antihypertensives stabilize the mother but are not definitive. Expectant management is not appropriate for unstable patients or those with severe features that do not resolve.
- Which of the following is the most appropriate oral medication to manage her hypertension?
Answer: Nifedipine extended-release
This patient has persistent postpartum hypertension requiring treatment. First-line oral agents for postpartum hypertension, which are safe in breastfeeding, include nifedipine and labetalol. Lisinopril (an ACE inhibitor) is generally avoided in the immediate postpartum period, especially in breastfeeding mothers. Furosemide is a diuretic and not a first-line antihypertensive unless there is evidence of fluid overload, such as pulmonary edema. Clonidine can cause sedation and is not a first-line agent.
- This patient is at highest risk for which of the following complications at the time of delivery?
Answer: Postpartum hemorrhage requiring hysterectomy
The combination of placenta previa and multiple prior cesarean deliveries is the strongest risk factor for placenta accreta spectrum (PAS). The ultrasound findings described (loss of clear space, lacunae) are also highly suggestive of PAS, a condition where the placenta invades abnormally into the uterine wall. Attempts to separate the placenta at delivery can lead to massive, life-threatening postpartum hemorrhage, which frequently necessitates a planned cesarean hysterectomy. While uterine rupture is a risk with prior C-sections, the risk of hemorrhage from PAS is higher in this specific clinical scenario.
- ED: 35-year-old G3P2 at 36 weeks with painful bleeding and hypertonic uterus; BP 90/55, HR 122. Most appropriate immediate intervention?
Answer: Begin IV fluids, type and cross, and transfuse as needed
This question tests knowledge of pregnancy complications in obstetrics and gynecology, specifically stabilizing hemorrhagic shock in abruption. Understanding pregnancy complications involves recognizing signs of hypovolemia and coagulopathy in abruption. In this scenario, specific details such as hypotension, tachycardia, painful bleeding, and hypertonic uterus require immediate resuscitation. The correct answer, 'Begin IV fluids, type and cross, and transfuse as needed', aligns with guidelines for maternal stabilization. A common distractor might suggest 'Administer terbutaline to relax the uterus', which does not address hemodynamic instability. Teaching strategies include emphasizing ABCs in obstetric emergencies. Practice applying these principles through case studies and simulations for rapid response.
- What is the most likely diagnosis?
Answer: Threatened abortion
Threatened abortion is defined as any vaginal bleeding before 20 weeks of gestation in the presence of a closed cervix and a confirmed viable intrauterine pregnancy on ultrasound. Her symptoms and findings fit this diagnosis perfectly. An inevitable abortion would present with an open cervical os. While a subchorionic hemorrhage is a common cause of threatened abortion, 'threatened abortion' is the overall clinical diagnosis. A complete abortion involves the passage of all products of conception and would show an empty uterus on ultrasound.
- Which of the following interventions is most likely to reduce her risk of developing preeclampsia in this pregnancy?
Answer: Low-dose aspirin initiated now
Prophylaxis with low-dose aspirin (81 mg/day) is recommended for women at high risk of developing preeclampsia. A history of preeclampsia in a prior pregnancy, especially with an early-onset delivery (<34 weeks), is a major risk factor. Aspirin should be initiated between 12 and 16 weeks of gestation and continued until delivery. Sodium restriction and prophylactic antihypertensives in a normotensive patient have not been shown to prevent preeclampsia. Calcium supplementation is recommended only for women with low dietary calcium intake to reduce preeclampsia risk.
- Which of the following is the most appropriate management plan?
Answer: Expectant management with latency antibiotics and a course of corticosteroids.
This patient has preterm prelabor rupture of membranes (PPROM) at a pre-viable or peri-viable gestational age. In the absence of infection, labor, or fetal compromise, the standard of care is expectant management to prolong the pregnancy (increase latency). This includes administration of a course of antenatal corticosteroids to enhance fetal lung maturity and a course of latency antibiotics (e.g., ampicillin and erythromycin) to reduce the risk of chorioamnionitis and prolong the time to delivery. Induction of labor would be indicated for signs of infection or fetal distress. Prolonged tocolysis is not recommended, and amnioinfusion is not standard practice.
- Which of the following is the most likely diagnosis?
Answer: Inevitable abortion
This patient's presentation is consistent with an inevitable abortion, which is characterized by vaginal bleeding, a dilated cervical os, but no passage of products of conception from the uterus yet. The presence of products of conception at the os indicates that passage is imminent. A threatened abortion would have a closed cervical os. An incomplete abortion involves the passage of some, but not all, products of conception. A missed abortion involves fetal demise without cervical change or passage of tissue.
- Which of the following is the most appropriate next step in management?
Answer: Discuss options including expectant, medical, or surgical management.
The ultrasound finding of a non-viable fetus without passage of tissue or cervical change is diagnostic of a missed abortion. The most appropriate next step is to counsel the patient on the three acceptable management options: 1) expectant management (awaiting spontaneous passage), 2) medical management (e.g., with misoprostol to induce passage), and 3) surgical management (dilation and curettage). The choice depends on patient preference, clinical stability, and gestational age. While Rho(D) immune globulin will be needed if she is Rh-negative, counseling on the primary management is the first step. Serial labs or ultrasounds are not necessary as the diagnosis is definitive.
- L&D: 32-year-old G2P1 at 34 weeks with preeclampsia develops tonic-clonic seizure. Airway protected. Most effective immediate treatment?
Answer: IV magnesium sulfate bolus and infusion
This question tests knowledge of pregnancy complications in obstetrics and gynecology, specifically treating eclampsia seizures. Understanding pregnancy complications involves rapid administration of anticonvulsants in preeclampsia progression. In this scenario, specific details such as tonic-clonic seizure at 34 weeks require immediate therapy. The correct answer, 'IV magnesium sulfate bolus and infusion', aligns with guidelines as first-line for eclampsia. A common distractor might suggest 'IV diazepam as sole therapy', which is less effective long-term. Teaching strategies include emphasizing magnesium dosing and monitoring. Practice applying these principles through case studies and simulations for emergency response.
- Which of the following is the most appropriate next step in management?
Answer: Discontinue tocolysis and continue inpatient observation.
The primary purpose of tocolytic therapy in preterm labor is to delay delivery for up to 48 hours to allow for the administration and full effect of antenatal corticosteroids. There is no evidence that maintenance tocolysis beyond this initial 48-hour period improves neonatal outcomes, and it may increase maternal side effects. Therefore, once the 48-hour window is complete and contractions have ceased, the tocolytic agent should be discontinued. Strict bed rest has not been shown to be effective and is no longer recommended. Amniocentesis is not indicated as management would not change.
- Which of the following is the most appropriate next step in management?
Answer: Initiate therapy with insulin.
This patient has failed to achieve glycemic control with conservative management (diet and exercise). Therefore, pharmacologic therapy is indicated. Insulin is the preferred first-line medication for gestational diabetes as it does not cross the placenta and has a long-standing safety record. Metformin is also a reasonable first-line option. Glyburide is used less commonly due to a higher risk of neonatal hypoglycemia. Simply reinforcing diet is inappropriate as she has already failed this approach. Fetal surveillance is indicated once pharmacotherapy is started, but the immediate next step is to initiate medication to control her glucose levels.
- What is the most appropriate next step in management?
Answer: Prepare for immediate emergency cesarean delivery.
This patient's presentation of trauma, painful vaginal bleeding, a rigid and tender uterus, maternal tachycardia, and fetal bradycardia is classic for a severe placental abruption. This is a life-threatening emergency for both the mother and fetus. The most appropriate next step is immediate delivery via emergency cesarean section. Diagnostic studies like ultrasound should not delay definitive management in an unstable patient. Tocolytics are contraindicated in placental abruption. Corticosteroids are appropriate for anticipated preterm birth but are not the priority over immediate delivery in the setting of maternal and fetal compromise.
- In addition to administering antenatal corticosteroids, which of the following is the most appropriate management?
Answer: Tocolysis with indomethacin and magnesium sulfate for neuroprotection
This patient is in preterm labor at <32 weeks gestation. The standard management includes: 1) Antenatal corticosteroids (e.g., betamethasone) to promote fetal lung maturity, 2) Tocolysis to delay delivery for at least 48 hours to allow steroids to work (indomethacin is a first-line choice at this gestational age), and 3) Magnesium sulfate for fetal neuroprotection, which is indicated for pregnancies between 24 and 32 weeks at risk of imminent delivery. Expectant management is insufficient for diagnosed preterm labor. Amniocentesis is not necessary as steroids are given empirically before 34 weeks. Augmentation of labor is contraindicated.
- Which of the following is the most appropriate management?
Answer: Proceed with induction of labor.
According to current guidelines, delivery is recommended for patients with gestational hypertension or preeclampsia without severe features at or beyond 37 0/7 weeks of gestation. This patient is at 38 weeks. Induction of labor is the appropriate management to prevent the potential progression to preeclampsia with severe features and other adverse maternal and fetal outcomes. Expectant management is not recommended at term. While antihypertensives may be used, delivery is the definitive management. Cesarean delivery is not indicated without a maternal or fetal indication.
- ED: 35-year-old G3P2 at 36 weeks has sudden abdominal pain and heavy vaginal bleeding; uterus firm, fetal tracing shows late decelerations. Next management step?
Answer: Initiate maternal stabilization and urgent delivery
This question tests knowledge of pregnancy complications in obstetrics and gynecology, specifically the management of placental abruption with fetal distress. Understanding pregnancy complications involves recognizing clinical signs like sudden pain, heavy bleeding, firm uterus, and fetal heart rate abnormalities. In this scenario, specific details such as 36 weeks gestation, firm uterus, and late decelerations point towards abruption requiring urgent intervention. The correct answer, 'Initiate maternal stabilization and urgent delivery', aligns with guidelines for managing abruption with hemodynamic instability or fetal compromise. A common distractor might suggest 'Perform digital cervical exam to assess dilation', which is contraindicated due to risk of exacerbating bleeding. Teaching strategies include emphasizing rapid assessment and stabilization in obstetric emergencies. Practice applying these principles through case studies and simulations to improve recognition of abruption signs.
- Which of the following interventions is the most appropriate for this patient?
Answer: Cervical cerclage placement
This patient has both a history of spontaneous preterm birth and a short cervix (<25 mm) detected on ultrasound before 24 weeks. In this situation, a history-indicated cerclage is the most effective intervention to reduce the risk of recurrent preterm birth. Vaginal progesterone is indicated for patients with a short cervix but no history of preterm birth. 17-OHPC is an option for patients with a history of preterm birth but a normal cervical length. Bed rest has not been shown to be effective.
- What is the most likely diagnosis?
Answer: Placenta previa
The classic presentation of placenta previa is painless, bright red vaginal bleeding in the third trimester. The uterus is typically soft and non-tender, and the fetal heart tracing is often reassuring initially. A history of a low-lying placenta on a prior ultrasound further supports this diagnosis. Placental abruption typically presents with painful vaginal bleeding and a tender, firm uterus. Uterine rupture is characterized by intense abdominal pain and fetal distress. Vasa previa classically presents with bleeding immediately following rupture of membranes, accompanied by acute fetal distress.
