A 70-kg client with septic shоck secоndаry tо urosepsis hаs been receiving аggressive treatment in the ICU for the past hour, including: 30 mL/kg of IV lactated Ringer's per the Surviving Sepsis Campaign bundle Broad-spectrum IV antibiotics (piperacillin-tazobactam) A norepinephrine infusion titrated to maintain MAP ≥ 65 mm Hg Admission values (1 hour ago): MAP: 58 mm Hg HR: 128 bpm Serum lactate: 4.8 mmol/L Urine output: 15 mL/hr Skin: mottled, cap refill > 4 sec The nurse is reviewing the chart to evaluate the client's response to treatment. Which documented change best indicates that the client's condition is improving?