CPM Certified Professional Midwife

Answer: C - The midwife administers calcium gluconate when the client has a serum magnesium level of 7.7 mEq/L. Calcium gluconate is the antidote for magnesium toxicity. A client receiving magnesium sulfate IV should be monitored every hour. A respiratory rate below 12 breaths per minute, a urine output of less than 30 mL/hour, a serum magnesium level greater than 7.5 mEq/L, absent or decreased deep tendon reflex and decreased consciousness indicate magnesium toxicity.