A 28-year-old pregnant woman at 32 weeks gestation presents to the labor and delivery unit with complaints of severe headache, blurred vision, and epigastric pain. Her blood pressure is 160/110 mmHg, and she has 3+ proteinuria. Which assessment finding would be most concerning and require immediate intervention?
1Ankle edema and weight gain of 2 pounds in one week
2Blood pressure of 160/110 mmHg on repeated measurements
33+ proteinuria on dipstick urinalysis
4Hyperreflexia with sustained clonus✓ 정답
해설
Hyperreflexia with sustained clonus indicates severe CNS irritability and imminent risk of eclamptic seizures, requiring immediate magnesium sulfate administration. Other findings (hypertension, proteinuria, edema) are typical of severe preeclampsia but less urgent.
Core Nursing Explanation
This question tests the critical nursing skill of prioritizing assessment findings in a patient with severe preeclampsia. The patient already meets the diagnostic criteria for severe preeclampsia (BP ≥160/110 mmHg, significant proteinuria). The nurse must now identify which finding signals the greatest immediate danger: progression to an eclamptic seizure.
Key Concept Analysis
The core theme is recognizing Key Point!neurological signs of impending eclampsia. Severe preeclampsia is a multi-system disorder characterized by vasospasm and endothelial damage. When this process affects the central nervous system (CNS), it causes cerebral edema and increased intracranial pressure, leading to hyperirritability. This manifests as hyperreflexia (exaggerated deep tendon reflexes) and clonus (a series of involuntary, rhythmic muscle contractions when the foot is dorsiflexed). Sustained clonus (more than 3-4 beats) is a particularly ominous sign of severe CNS irritability and indicates a very high risk for seizure.
Answer RationaleKey Point! Option ④, "Hyperreflexia with sustained clonus," is the most concerning finding because it is a direct indicator of neurological deterioration and imminent risk of eclamptic seizure. An eclamptic seizure is a life-threatening obstetric emergency for both the mother (risk of cerebral hemorrhage, aspiration, death) and the fetus (risk of abruptio placentae, severe hypoxia). This finding requires immediate intervention, typically the administration of magnesium sulfate to prevent seizures.
Distractor Analysis
Option ① (Ankle edema and weight gain): While edema and rapid weight gain can be associated with preeclampsia, they are also very common in normal pregnancy. Watch out for confusion! Edema is no longer a diagnostic criterion for preeclampsia because it lacks specificity. This finding, by itself, does not indicate an acute, life-threatening change.
Option ② (BP 160/110 mmHg): This blood pressure definitively classifies the condition as severe preeclampsia and requires treatment (e.g., antihypertensive medication like labetalol or hydralazine). However, the hypertension itself, while dangerous, is not the most immediate predictor of a seizure. The neurological signs are.
Option ③ (3+ proteinuria): Like the high BP, this is a key diagnostic criterion for severe preeclampsia, indicating significant renal involvement. It confirms the severity of the disease but, again, is not the direct neurological warning sign of an impending seizure.
Related Concepts
The management of severe preeclampsia focuses on two main goals: preventing maternal seizures (with magnesium sulfate) and controlling severe hypertension to prevent stroke. The definitive treatment is delivery of the fetus and placenta.
Concept Summary
Term
Definition & Significance
Preeclampsia
Pregnancy-specific syndrome of hypertension (≥140/90 mmHg) and proteinuria (≥300 mg/24hr) after 20 weeks gestation.
Severe Preeclampsia
BP ≥160/110 mmHg, proteinuria ≥5 g/24hr (or 3+ on dipstick), or signs of end-organ involvement (CNS, hepatic, renal, hematologic).
Eclampsia
The onset of grand mal seizures in a patient with preeclampsia, not attributable to other causes.
HELLP Syndrome
A severe variant: Hemolysis, Elevated Liver enzymes, Low Platelets. Presents with epigastric/RUQ pain, nausea/vomiting.
Hyperreflexia & Clonus
Signs of CNS irritability. Sustained clonus is a red flag for imminent eclampsia.
Side-by-Side Comparison!
Assessment Finding
What It Indicates
Nursing Priority & Action
Headache/Blurred Vision/Epigastric Pain
Symptoms of severe preeclampsia (cerebral edema, hepatic capsule stretch).
High priority. Report immediately. Prepare for possible magnesium sulfate and delivery.
Hyperreflexia with Clonus
Key Point!Imminent risk of eclamptic seizure.
Highest priority. Requires immediate magnesium sulfate administration to prevent seizure.
Severe Hypertension (160/110)
Diagnostic for severe preeclampsia. Risk of stroke (hemorrhagic).
High priority. Administer antihypertensives as ordered (e.g., labetalol IV) to lower BP gradually.
3+ Proteinuria
Diagnostic for severe preeclampsia. Indicates significant renal damage.
Monitor intake/output, assess for edema. Confirms diagnosis but is not an acute intervention trigger.
Anatomy, Physiology & Pharmacology Points
Pathophysiology: Preeclampsia is thought to stem from abnormal placental development leading to widespread maternal endothelial dysfunction, vasospasm, and increased vascular permeability. This causes hypertension, proteinuria, and edema.
CNS Mechanism: Cerebral vasospasm and edema reduce blood flow, causing ischemia and neuronal hyperirritability, leading to headache, visual changes, hyperreflexia, and eventually seizures.
Drug of Choice - Magnesium Sulfate: It is a CNS depressant and vasodilator. It does not significantly lower BP. Its primary role is to prevent and treat eclamptic seizures. Nurses must monitor for toxicity: loss of deep tendon reflexes (first sign), respiratory depression, cardiac arrest. Calcium gluconate is the antidote.
Memory Tips
HELLP: Hemolysis, Elevated LFTs, Low Platelets. Think of the patient feeling "HELLP! My liver hurts!" (epigastric/RUQ pain).
MgSO4 Monitoring: Remember the "4 D's" of Magnesium Toxicity: Deep tendon reflexes Disappear, Diuresis stops (oliguria), Diplopia (blurred vision), Depressed respirations.
High-Frequency NCLEX Topics
NCLEX heavily tests the nurse's ability to recognize complications of pregnancy and prioritize interventions. Preeclampsia/eclampsia is a classic topic. You must know:
1. The difference between mild and severe preeclampsia criteria.
2. The symptoms of severe disease (headache, visual changes, epigastric pain).
3. That neurological signs (hyperreflexia/clonus) trump other findings for immediate action.
4. The purpose, administration, and toxicity monitoring of magnesium sulfate.
Watch Out for Question Variations!
From Symptom to Intervention: "The nurse assesses a preeclamptic client and finds sustained ankle clonus. What is the nurse's priority action?" (Answer: Administer magnesium sulfate as ordered).
Medication Focus: "A client receiving IV magnesium sulfate has a respiratory rate of 10/min. What should the nurse do first?" (Answer: Stop the magnesium infusion and prepare to administer calcium gluconate).
Postpartum Focus: "A client delivered 12 hours ago for severe preeclampsia. For which finding should the nurse monitor most closely?" (Answer: Seizure activity, as eclampsia can occur up to 6 weeks postpartum).
Nursing Clinical Practice GuideClinical Scenario: You are the nurse in a Labor & Delivery unit. Ms. Jones, 32 weeks pregnant, is admitted with a BP of 162/108, complaining of a "crushing" headache she rates 9/10, seeing spots, and severe pain "right under my ribs." The urine dip shows 3+ protein. You are performing your initial neurological assessment.
Nursing Intervention Strategy:
Assessment (Focused & Frequent):
Neurological: Check deep tendon reflexes (patellar, biceps) every 1-2 hours. Test for clonus by quickly dorsiflexing the foot. Assess level of consciousness, headache severity, and visual disturbances.
Vital Signs: Automatic BP monitoring every 15-30 minutes. Monitor for worsening hypertension.
Fetal: Continuous electronic fetal monitoring (EFM) to assess for signs of distress (late decelerations, decreased variability) from uteroplacental insufficiency.
Systems: Monitor for epigastric/RUQ pain (sign of hepatic involvement/HELLP), urine output (should be ≥30 mL/hr), and respiratory status (especially if on MgSO4).
Immediate Actions for Hyperreflexia/Clonus:
Stay with the patient. Call the provider STAT.
Ensure IV access is patent.
Prepare the loading dose of magnesium sulfate (typically 4-6 g IV over 20-30 minutes) as ordered.
Dim lights, minimize noise, maintain a quiet environment to reduce stimuli.
Have suction and oxygen equipment at the bedside in case of seizure.
Ongoing Care & Patient Safety:
Medication Safety: When administering MgSO4 maintenance infusion, use an IV pump. Never bolus it.
Toxicity Monitoring: Before each subsequent dose, check: 1) Patellar reflex (must be present), 2) Respiratory rate (must be >12/min), 3) Urine output (must be >30 mL/hr over 4 hrs). Absent reflexes are the first sign of toxicity.
Seizure Precautions: Pad side rails, keep the bed in low position. If a seizure occurs, protect the airway, turn patient to left lateral position, administer O2, and call for help.
Patient Education: Explain all procedures. Teach the patient to report worsening headache, visual changes, or epigastric pain immediately.
If signs of toxicity: STOP infusion. Administer calcium gluconate 1g IV push over 3 min as ordered. Support airway/breathing.
Calcium gluconate is the direct antagonist to magnesium's effects at the neuromuscular junction.
A Word from Your Senior Nurse
"Managing a patient with severe preeclampsia is one of the most high-stakes situations in obstetric nursing. Your vigilant assessment is the primary defense against eclampsia. Remember, the blood pressure number gets our attention, but it's the neurological exam that tells us if a seizure is coming. When you check reflexes and clonus, you're not just following a protocol—you're literally peering into the patient's brainstem function. If you ever see sustained clonus, your internal alarm bells should be screaming. That's the moment your knowledge directly prevents a catastrophe. Study this patho, know your magnesium inside and out, and you'll walk into any NCLEX question or clinical shift with the confidence to protect your moms and babies."
Preeclampsia — A pregnancy-specific hypertensive disorder occurring after 20 weeks gestation, characterized by new-onset hypertension (≥140/90 mmHg) and proteinuria (≥300 mg/24 hours). It involves systemic endothelial dysfunction and vasospasm.
Eclampsia — The occurrence of new-onset, generalized tonic-clonic seizures in a patient with preeclampsia, not attributable to other cerebral conditions. It is a life-threatening complication requiring immediate treatment.
Hyperreflexia — Exaggerated deep tendon reflexes (e.g., patellar, biceps). In preeclampsia, it indicates central nervous system irritability due to cerebral edema and ischemia, signaling increased risk for seizure.
Clonus — A series of involuntary, rhythmic, muscular contractions and relaxations elicited by a sudden passive stretch of a muscle (e.g., by briskly dorsiflexing the foot). Sustained clonus (≥3 beats) is a critical sign of severe neurological irritability and imminent eclampsia.
Magnesium Sulfate — The drug of choice for preventing and treating eclamptic seizures. It acts as a CNS depressant and vasodilator. Nurses must vigilantly monitor for signs of toxicity: loss of deep tendon reflexes, respiratory depression (<12/min), oliguria, and cardiac arrest. Calcium gluconate is the antidote.