SEIZURES IN PREGNANCY. Incidence Seizures complicate 1% of pregnancies.

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Presentation transcript:

SEIZURES IN PREGNANCY

Incidence Seizures complicate 1% of pregnancies.

Association with Congenital Defects Maternal epilepsy is associated with a two-fold increase in the incidence of congenital abnormalities. Anticonvulsant therapy may contribute to the incidence of congenital abnormalities in the children of epileptics, but some increased risk is present regardless of therapy.

Justification for Treatment However, anticonvulsant therapy in pregnancy is justified to prevent uncontrolled generalized seizures.

Specific Anticonvulsants Used Phenytoin (Dilantin®) and carbamazepine (Tegretol®) have been used successfully in pregnancy. Phenobarbital may be associated with a higher rate of congenital anomalies. Valproic acid (Depakote®) has also been used but has a 1% risk of neural tube defects associated with it.

Anticonvulsant Levels Total blood levels of anticonvulsants tend to go down in pregnancy due to increased hepatic and renal clearance and an increased volume of distribution. This is partially counteracted by the fact that free (and therefore active) drug levels may increase due to a normal decrease on the concentration of serum proteins that occurs in pregnancy.

Anticonvulsant Management Serum blood levels should be checked monthly in pregnant woman and anticonvulsant dose adjusted accordingly. Some clinicians prefer to follow their patients clinically and adjust dosing only if seizures occur.

Effect of Pregnancy on the Course of Epilepsy Approximately 20% of epileptic women have increased seizure frequency during pregnancy, mostly due to poor compliance with anticonvulsant therapy, but also due to nausea and vomiting and sleep deprivation.

Acute Seizure Management Acute management of a seizure during pregnancy is the same as it is for the nonpregnant individual but, remember that maintaining maternal oxygenation is paramount to the fetus, not all seizures in pregnancy are from epilepsy (but not all of them are from eclampsia either).

Peripartum Management Vitamin K administration in the last month of pregnancy probably decreases the risk of hemorrhagic disease of the newborn and postpartum hemorrhage in the mother.

Postpartum Management After delivery, mothers with seizure disorders can be sent home on a dose halfway between their pre-pregnancy dose and their most recent pregnancy dose. They can go back to their prepregnancy dosing by two weeks postpartum. Mothers with seizure disorders should be given some practically advice about safely caring for their newborn.

Breast Feeding All anticonvulsants are compatible with breast feeding.