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Difficulty: MediumObstetric Complications

Match each clinical presentation of elevated blood pressure during pregnancy to the most accurate diagnostic classification according to current obstetric guidelines.

  • A 28-year-old G1P0 at 32 weeks gestation with a blood pressure of 148/94148/94 mm Hg. Urinalysis shows no protein, and serum laboratory studies are unremarkable.Gestational hypertension
  • A 33-year-old G2P1 at 36 weeks gestation with a blood pressure of 146/96146/96 mm Hg. Urine protein-to-creatinine ratio is 0.420.42. She has no headaches or visual changes.Preeclampsia
  • A 30-year-old G1P0 at 34 weeks gestation with a blood pressure of 152/98152/98 mm Hg, new-onset dyspnea, and bibasilar lung crackles. Urine dipstick is negative for protein.Preeclampsia with severe features
  • A 35-year-old G3P2 at 14 weeks gestation with a blood pressure of 144/92144/92 mm Hg at her initial prenatal visit. Baseline laboratory studies are normal.Chronic hypertension

Answer

The presentations map as follows: 32 weeks without proteinuria is Gestational hypertension; 36 weeks with proteinuria is Preeclampsia; 34 weeks with pulmonary edema is Preeclampsia with severe features; 14 weeks is Chronic hypertension.
Accurate classification of hypertensive disorders in pregnancy requires evaluating three core parameters: gestational age at presentation (≥20\geq 20 weeks versus <20< 20 weeks), presence or absence of proteinuria, and the presence or absence of end-organ damage (severe features). The clinical vignettes systematically isolate each of these parameters to confirm the correct distinct diagnoses based on current ACOG criteria.

Step-by-Step Solution

1
Determine the gestational age at the onset of hypertension.
Onset before 20 weeks indicates chronic hypertension, while onset after 20 weeks points to a pregnancy-induced disorder.
Gestational age is the primary differentiator between chronic and gestational disease processes.
2
Assess for the presence of proteinuria.
Significant proteinuria (≥300\geq 300 mg/24 hr or protein-to-creatinine ratio ≥0.3\geq 0.3) differentiates preeclampsia from isolated gestational hypertension.
Proteinuria signifies endothelial damage and renal involvement characteristic of preeclampsia.
3
Identify any severe clinical features or end-organ dysfunction.
The presence of pulmonary edema elevates the diagnosis to preeclampsia with severe features, regardless of the proteinuria status.
Severe features warrant closer monitoring and often prompt delivery due to significantly higher maternal and fetal morbidity risks.

Key Concept

Diagnostic criteria for hypertensive disorders of pregnancy
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Topics

Obstetric Complications

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