Question

A pregnancy client is receiving magnesium sulfate for the management of preeclampsia. The nurse determines that the client is experiencing toxicity from the medication if which finding is noted on assessment?

1. Proteinuria of 3+
2. Respirations of 10 breaths/minutes
3. Presence of deep tendon reflexes
4. Serum magnesium level of 6 mEq/L

Answer 1

A pregnancy client receiving magnesium sulfate would be considered to have magnesium toxicity if the nurse observes respirations of 10 breaths per minute, as magnesium sulfate can depress respiratory function when toxic levels are reached.

Step-by-step explanation:

A pregnancy client on magnesium sulfate therapy for the management of preeclampsia would be experiencing toxicity from the medication if the nurse notes respirations of 10 breaths per minute. Magnesium sulfate can depress the respiratory rate when administered in high doses or when toxicity occurs. Other signs of magnesium sulfate toxicity can include loss of deep tendon reflexes, confusion, and a serum magnesium level significantly higher than the normal range (usually 1.7 to 2.2 mg/dL or 0.7 to 0.9 mmol/L). The serum magnesium level of 6 mEq/L is clearly elevated but is not directly correlated with toxicity without considering clinical signs and symptoms. Proteinuria of 3+ is related to the severity of preeclampsia but is not an indicator of magnesium toxicity. The presence of deep tendon reflexes suggests that the neuromuscular junction is functioning properly, which is not indicative of magnesium toxicity.