Core Nursing Explanation
Key Concept Analysis: This question assesses the ability to identify a critical, potentially life-threatening complication of pregnancy:
Preeclampsia. Preeclampsia is a hypertensive disorder of pregnancy characterized by new-onset hypertension (blood pressure ≥140/90 mmHg) and proteinuria after 20 weeks of gestation. The scenario specifically points to
Severe features of preeclampsia, which mandate immediate medical intervention to prevent progression to eclampsia (seizures) or HELLP syndrome (Hemolysis, Elevated Liver enzymes, Low Platelets).
Answer Rationale:
Key Point! The correct answer is option ②. A blood pressure of
158/102 mmHg meets the criteria for severe-range hypertension (systolic ≥160 or diastolic ≥110). Combined with
2+ proteinuria, this is a classic and urgent presentation of severe preeclampsia. This finding requires immediate further evaluation, which would likely include hospitalization, lab work (CBC, liver enzymes, creatinine), and possibly planning for delivery, as the definitive cure for preeclampsia is delivery of the placenta.
Distractor Analysis:
- Option ① (Mild ankle edema): Watch out for confusion! Dependent edema is a common, expected finding in the third trimester due to increased venous pressure and fluid retention. It becomes concerning only if it is sudden, severe (e.g., facial or hand edema), or accompanied by hypertension and proteinuria.
- Option ③ (Braxton Hicks contractions): These are irregular, painless practice contractions that are a normal part of pregnancy, especially in the third trimester. They are not a sign of labor or pathology unless they become regular, painful, and increase in frequency.
- Option ④ (Fetal heart rate of 150 bpm): A fetal heart rate between 110-160 beats per minute with good variability is a reassuring sign of fetal well-being. This is a normal, expected finding.
Related Concepts: The priority in prenatal assessment is to screen for and identify complications that threaten maternal and fetal health. Preeclampsia is a leading cause of maternal and perinatal morbidity. NCLEX questions often test the "most concerning" finding, requiring you to prioritize based on the
ABCs (Airway, Breathing, Circulation) and potential for rapid deterioration. Here, uncontrolled severe hypertension directly threatens cerebral perfusion and can lead to stroke or seizures.
Concept Summary
| Concept | Key Points |
| Preeclampsia | Hypertension + Proteinuria after 20 weeks. A pregnancy-specific syndrome. |
| Severe Features | BP ≥160/110, severe headache, visual changes, RUQ pain, pulmonary edema, impaired liver function, thrombocytopenia, severe proteinuria. |
| Eclampsia | Preeclampsia + new-onset grand mal seizures. |
| HELLP Syndrome | Variant of severe preeclampsia: Hemolysis, Elevated Liver enzymes, Low Platelets. |
| Normal 3rd Trimester Findings | Dependent edema, Braxton Hicks, FHR 110-160 bpm with variability. |
Side-by-Side Comparison!
| Assessment Finding | Normal/Expected | Concerning/Abnormal |
| Blood Pressure | Consistent with pre-pregnancy baseline or mild elevation. | ≥140/90 mmHg (Preeclampsia) or ≥160/110 mmHg (Severe). |
| Edema | Mild ankle/foot edema that pits and resolves with rest/elevation. | Sudden, severe edema in face, hands (facial edema); generalized edema. |
| Contractions | Irregular, painless Braxton Hicks. | Regular, painful contractions increasing in frequency (sign of preterm labor). |
| Proteinuria | Trace or absent on dipstick. | 1+ or greater (especially 2+ or 3+) on random sample, or ≥300 mg/24h urine collection. |
Anatomy, Physiology & Pharmacology Points
- Pathophysiology: Preeclampsia is thought to originate from abnormal placental development, leading to endothelial dysfunction, systemic vasoconstriction, and increased vascular permeability. This causes hypertension, proteinuria, and edema.
- Key Organ Systems at Risk: Brain (seizures, stroke), Liver (HELLP), Kidneys (proteinuria, oliguria), Hematologic (thrombocytopenia), and Placenta (fetal growth restriction, abruption).
- First-Line Drug: Magnesium sulfate is used for seizure prophylaxis in preeclampsia with severe features and for treatment of eclamptic seizures. It is not an antihypertensive; its mechanism is central nervous system depression.
- Antihypertensives: Medications like labetalol or hydralazine are used to manage severe hypertension.
Memory Tips
- Think "BP + P": For preeclampsia, remember it's defined by Blood Pressure + Proteinuria.
- Severe Range Numbers: Memorize the "160/110" threshold for severe hypertension. It's a critical NCLEX number.
- HELLP Acronym: Hemolysis, Elevated Liver enzymes, Low Platelets.
High-Frequency NCLEX Topics
Preeclampsia is a
High Yield topic. The NCLEX will test:
- Identifying signs and symptoms (especially severe features).
- Knowing priority nursing assessments (neurological checks, deep tendon reflexes, monitoring for clonus).
- Understanding medication purposes (MgSO4 for seizure prophylaxis, monitoring for toxicity).
- Recognizing findings that require immediate reporting to the provider.
Watch Out for Question Variations!
- Symptom Identification → Priority Intervention: "The nurse notes a BP of 162/110 and 3+ proteinuria in a client at 34 weeks. What is the nurse's priority action?" (Answer: Notify the provider immediately, prepare for possible MgSO4 administration).
- Medication Focus: "A client with severe preeclampsia is receiving magnesium sulfate. Which finding indicates toxicity?" (Answer: Respiratory depression < 12/min, loss of deep tendon reflexes).
- Postpartum Focus: "A client delivered 12 hours ago had preeclampsia. The nurse should monitor for which complication?" (Answer: Seizures, as eclampsia can occur up to 6 weeks postpartum).