A nurse is caring for a client. The nurse is collecting data from the client 12 hr later. How should the nurse interpret the following findings? For each potential finding, click to specify whether the finding is an indication of potential improvement or an indication of potential worsening condition.

Lithium level (1.2 mEq/L): The lithium level decreased from 1.8 mEq/L to 1.2 mEq/L. Since therapeutic toxicity is usually >1.5 mEq/L, the reduction indicates improvement in lithium toxicity. Urine output (40 mL/hr): Normal adult urine output is ~0.5–1 mL/kg/hr. A urine output of 40 mL/hr may be low for an adult and, combined with other findings (hypotension, dry mucus membranes), suggests worsening condition, possibly dehydration or early kidney compromise. Vision (blurred): Blurred vision is a classic sign of lithium toxicity or fluid/electrolyte imbalance. Since it appeared 12 hr later, it indicates worsening condition. Vital signs: Hypotension (88/50 mm Hg) and tachycardia (pulse 96/min) are new findings compared with admission. These are signs of worsening condition, possibly hypovolemia or lithium-related adverse effects. Mucus membranes (pale, dry): Dry mucus membranes suggest dehydration, which is a worsening condition.