Updated: 12/29/2021

Preeclampsia and Eclampsia

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  • Snapshot
    • A 20-year-old woman at 30 weeks gestation presents to the emergency room with malaise, headache, and nausea. On physical exam, she is alert and oriented. She is noted to have bilateral lower extremity edema. A urine dipstick shows 2+ proteinuria and her blood pressure is 150/96 mmHg. Her other laboratory values are within normal limits. She is discharged home. The next day, she returns with a worsening headache and found with elevated blood pressure again at 163/100 mmHg. She is admitted and started on magnesium sulfate for seizure prophylaxis.
  • Introduction
    • Overview
      • hypertension during pregnancy can be chronic hypertension, gestational hypertension, preeclamspia, or eclampsia
      • some consider HELLP syndrome to be a form of preeclampsia/eclampsia although this is controversial
    • Diagnosis of preeclampsia
      • hypertension (> 140/90 mmHg on 2 separate occasions or 160/110 mmHg) and proteinuria
      • can also be diagnosed without proteinuria if one of the following signs of severe preeclampsia
        • blood pressure > 160/110 mmHg
        • hepatic dysfunction
        • renal insufficiency
        • visual/cerebral disturbances
        • pulmonary edema
        • thrombocytopenia
    • Spectrum of Hypertensive Disorders in Pregnancy
      Chronic Hypertension
      Gestational Hypertension
      Preeclampsia
      Eclampsia

      HELLP Syndrome

      • History of hypertension(> 140/90 mmgHg) before pregnancy or before 20 weeks of gestation
      • Hypertension persists after delivery
      • Hypertension after 20 weeks of gestation
      • Hypertension returns to baseline by 6 weeks post-partum
      • Common in multiple gestations
        • Hypertension (> 140/90 mmHg on 2 separate occasions, or >160/110 mmHg) plusproteinuria
        • Preeclampsia plus seizures
        • Hemolysis
        • ElevatedLiver enzymes
        • LowPlatelets
    • Epidemiology
      • Incidence
        • 2-6%
      • Risk factors
        • nulliparity
        • multiple gestations
        • hyatidiform mole
        • diabetes
        • chronic hypertension
        • chronic renal disease
    • Etiology
      • Pathogenesis
        • mechanism
          • impaired vasodilation of spiral arteries causes placental ischemia
          • this results in increased vascular tone, increased vasoconstriction, and decreased vasodilation
          • other factors considered to contribute include maternal immunologic intolerance, inflammatory changes, and abnormal placental implantation
    • Presentation
      • Symptoms
        • common symptoms
          • danger signs
            • headache
            • epigastric pain
            • visual changes
            • pulmonary edema
            • oliguria
          • water retention
      • Physical exam
        • inspection
          • hypertension > 140/90 mmHg
          • tonic-clonic seizures
          • hyperreflexia
          • periorbital and extremity edema
          • altered mental status
    • Studies
      • Serum labs
        • proteinuria
          • 1-2+ on dipstick
          • > 300 mg on 24-hour urine
          • protein/creatinine ratio > 0.3
            • best confirmatory test is a spot urine protein to creatinine ratio
        • thrombocytopenia
        • hemoconcentration
    • Differential
      • Acute fatty liver of pregnancy
        • key distinguishing factor
          • primarily characterized by fulminant liver failure
      • HELLP syndrome
        • key distinguishing factor
          • characterized by hemolysis, elevated liver enzymes, and low platelets
    • Treatment
      • Medical
        • antihypertensive medication
          • indications
            • blood pressure > 160/100 mmHg
              • risk of decreased utero-placental blood flow
          • drugs
            • labetalol
            • methyldopa
            • hydralazine
        • intravenous magnesium sulfate or diazepam
          • indications
            • seizure prophylaxis and treatment
          • magnesium toxicity can occur
            • hyporeflexia presents before bradypnea
            • treatment
              • calcium gluconate
      • Surgical
        • delivery
          • indications
            • the only definitive treatment
            • if mild preeclampsia, can monitor for progression to severe preeclampsia
            • if severe preeclampsia or eclampsia, deliver immediately
            • preeclampsia can still occur postpartum and still should be managed with IV magnesium
    • Complications
      • Maternal cerebral hemorrhage
      • Disseminated intravascular coagulopathy
      • Acute respiratory distress syndrome
      • Abruptio placentae
      • Recurrence of preeclampsia
    • Prognosis
      • Maternal mortality 14%
      • Most resolve after delivery
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    (M2.OB.14.121) A 32-year-old G1P0 woman presents to the emergency department at 34 weeks gestation. She complains of vague upper abdominal pain and nausea which has persisted for 2 weeks, as well as persistent headache over the past several days. Her temperature is 99.0°F (37.2°C), blood pressure is 164/89 mmHg, pulse is 88/min, respirations are 19/min, and oxygen saturation is 98% on room air.

    Hemoglobin: 10 g/dL
    Hematocrit: 30%
    Leukocyte count: 7,800/mm^3 with normal differential
    Platelet count: 25,000/mm^3

    Serum:
    Na+: 139 mEq/L
    Cl-: 100 mEq/L
    K+: 4.3 mEq/L
    HCO3-: 25 mEq/L
    BUN: 20 mg/dL
    Glucose: 99 mg/dL
    Creatinine: 1.1 mg/dL
    Ca2+: 10.2 mg/dL
    AST: 199 U/L
    ALT: 254 U/L

    Urine:
    Color: Yellow
    Protein: Positive
    Blood: Positive

    The patient begins seizing. Which of the following is the most appropriate definitive treatment for this patient?

    QID: 104761
    1

    Betamethasone

    0%

    (0/17)

    2

    Cesarean section

    24%

    (4/17)

    3

    Lorazepam

    29%

    (5/17)

    4

    Magnesium

    35%

    (6/17)

    5

    Platelet transfusion

    12%

    (2/17)

    M 6 E

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    (M2.OB.14.6) A 20-year-old woman presents to the emergency department with painful abdominal cramping. She states she has missed her menstrual period for 5 months, which her primary care physician attributes to her obesity. She has a history of a seizure disorder treated with valproic acid; however, she has not had a seizure in over 10 years and is no longer taking medications for her condition. She has also been diagnosed with pseudoseizures for which she takes fluoxetine and clonazepam. Her temperature is 98.0°F (36.7°C), blood pressure is 174/104 mmHg, pulse is 88/min, respirations are 19/min, and oxygen saturation is 98% on room air. Neurologic exam is unremarkable. Abdominal exam is notable for a morbidly obese and distended abdomen that is nontender. Laboratory studies are ordered as seen below.

    Serum:
    hCG: 100,000 mIU/mL

    Urine:
    Color: Amber
    hCG: Positive
    Protein: Positive

    During the patient's evaluation, she experiences 1 episode of tonic-clonic motions which persist for 5 minutes. Which of the following treatments is most appropriate for this patient?

    QID: 105176
    1

    Lorazepam

    2%

    (1/44)

    2

    Magnesium

    18%

    (8/44)

    3

    Phenobarbital

    77%

    (34/44)

    4

    Phenytoin

    0%

    (0/44)

    5

    Propofol

    0%

    (0/44)

    M 7 E

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    (M2.OB.13.5) A 25-year-old pregnant woman at 28 weeks gestation presents with a headache. Her pregnancy has been managed by a nurse practitioner. Her temperature is 99.0°F (37.2°C), blood pressure is 164/104 mmHg, pulse is 100/min, respirations are 22/min, and oxygen saturation is 98% on room air. Physical exam is notable for a comfortable appearing woman with a gravid uterus. Laboratory tests are ordered as seen below.

    Hemoglobin: 12 g/dL
    Hematocrit: 36%
    Leukocyte count: 6,700/mm^3 with normal differential
    Platelet count: 100,500/mm^3

    Serum:
    Na+: 141 mEq/L
    Cl-: 101 mEq/L
    K+: 4.4 mEq/L
    HCO3-: 25 mEq/L
    BUN: 21 mg/dL
    Glucose: 99 mg/dL
    Creatinine: 1.0 mg/dL
    AST: 32 U/L
    ALT: 30 U/L

    Urine:
    Color: Amber
    Protein: Positive
    Blood: Negative

    Which of the following is the most likely diagnosis?

    QID: 103368
    1

    Acute fatty liver disease of pregnancy

    3%

    (1/38)

    2

    Eclampsia

    0%

    (0/38)

    3

    HELLP syndrome

    42%

    (16/38)

    4

    Preeclampsia

    13%

    (5/38)

    5

    Severe preeclampsia

    39%

    (15/38)

    M 6 E

    Select Answer to see Preferred Response

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