What finding must a nurse report for a client on magnesium sulfate for preeclampsia?

In the context of magnesium sulfate administration for preeclampsia, monitoring urine output is vital because it is an indicator of kidney function and can reflect magnesium levels in the body. A urine output of less than 30 mL/hr is considered a critical threshold. This low output may signal potential toxicity or significant renal impairment, conditions that can arise from magnesium sulfate use. When urine output falls to 20 mL/hr, it is particularly concerning and must be reported, as it is below the acceptable range considered safe during this treatment. Effective management of magnesium sulfate includes vigilant monitoring of vital signs and urine output to preempt complications, making the reporting of such a finding essential for safeguarding patient health.