Eclampsia is defined as the onset of generalized tonic-clonic seizures in a woman with pre-eclampsia, which cannot be attributed to other neurological causes. The underlying mechanism involves severe vasospasm, endothelial damage, and cerebral hyperperfusion, leading to cerebral edema and localized ischemia. Prodromal signs often precede the convulsion and serve as critical warning indicators. Midwives must remain vigilant for severe frontal or occipital headaches, visual disturbances such as scotoma or blurred vision, right upper quadrant or epigastric pain, and sudden marked hyperreflexia with clonus.
Misconception alert: Not all women who convulse with eclampsia have severely elevated blood pressure readings beforehand; blood pressure can sometimes be only mildly raised when the seizure strikes. Recognizing these subtle neurological warnings allows for rapid intervention before full status epilepticus develops.
When an eclamptic seizure occurs, the immediate priority is maternal resuscitation and physical safety. Call for emergency help immediately without leaving the bedside. Position the patient on her side in the recovery position to prevent aspiration of saliva, blood, or vomitus. Protect her limbs from trauma against hard bed rails, but never force objects or padded tongue blades between clenched teeth, as this risks breaking teeth and obstructing the airway.
Maintain adequate oxygenation by administering high-flow oxygen via a face mask once the convulsion subsides. Check and maintain a patent airway, and monitor vital signs continuously while preparing for emergency drug therapy.
Magnesium sulfate is the undisputed drug of choice for both treating acute eclamptic convulsions and preventing recurrent seizures. Two primary administration regimens are widely utilized in clinical practice:
Before every repeat maintenance dose, the midwife must perform mandatory clinical safety checks:
Always keep calcium gluconate (10% solution, 10 mL administered intravenously over 3 minutes) immediately accessible at the bedside as the specific antidote for magnesium toxicity.
While magnesium sulfate controls the neurological instability, acute severe hypertension must be lowered promptly to prevent maternal cerebrovascular accidents (stroke) and cardiac failure. Severe hypertension is generally defined as systolic blood pressure of 160 mmHg or higher, or diastolic blood pressure of 110 mmHg or higher.
First-line antihypertensive agents used in obstetric emergencies include:
Blood pressure reduction must be managed carefully. Lowering blood pressure too fast or too far can compromise uteroplacental perfusion, leading directly to fetal distress. The goal is steady, controlled reduction, aiming for a safe diastolic range between 90 and 100 mmHg.
Definitive treatment for eclampsia is delivery of the fetus and placenta, regardless of gestational age, once the mother is stabilized. Stabilization typically takes between 30 to 60 minutes, focusing on airway security, seizure control with magnesium sulfate, and blood pressure stabilization.
The mode of delivery depends heavily on obstetric factors, cervical favorability, and gestational age. A cesarean section is indicated if the cervix is unfavorable, if there is fetal distress, or if vaginal delivery is not imminent. If the patient is in advanced labor with a favorable cervix, vaginal delivery is encouraged under careful continuous electronic fetal monitoring. Adequate regional or general anesthesia must be managed by skilled personnel, keeping in mind the bleeding risks associated with potential coagulopathy.
The danger to the mother does not end with delivery. Postpartum eclampsia can occur, and women remain at high risk for complications during the first 48 hours following birth. Magnesium sulfate therapy must be continued for 24 hours post-delivery or 24 hours after the last seizure, whichever is later.
Midwives must maintain rigorous monitoring of fluid balance to prevent life-threatening pulmonary edema, a frequent cause of maternal mortality in these cases. Strict fluid restriction and accurate hourly input and output charting are mandatory. Other severe complications to watch for include HELLP syndrome (Hemolysis, Elevated Liver enzymes, Low Platelets), acute kidney injury, and postpartum hemorrhage due to uterine atony or coagulopathies.