When monitoring a client for magnesium sulfate toxicity, which parameter is most important to assess?

Monitoring a client for magnesium sulfate toxicity primarily involves assessing the patellar reflex because magnesium sulfate is a central nervous system depressant and can lead to reduced neuromuscular excitability. The presence of a functioning patellar reflex indicates adequate neuromuscular transmission and helps identify potential signs of toxicity. When magnesium levels become excessively high, the patellar reflex may be diminished or absent, signaling a serious condition that warrants immediate intervention.

While blood pressure, heart rate, and temperature are also important parameters in general nursing assessments, they are less specific indicators of magnesium sulfate toxicity. Blood pressure and heart rate may be affected by various factors and do not provide direct insight into neuromuscular function. Similarly, changes in temperature may indicate other complications but are not directly tied to magnesium sulfate effects. Thus, the patellar reflex serves as a critical focal point for assessing magnesium sulfate toxicity.