A 62-year-old male with newly diagnosed acute myeloid leukemia (AML) was admitted to the ICU 48 hours ago for tumor lysis syndrome (TLS). He was started on daily rasburicase, aggressive IV hydration, electrolyte management, and required a norepinephrine infusion via a central venous catheter to maintain hemodynamics. Current vital signs: temperature 37.0°C, heart rate 85 bpm, blood pressure 102/60 mmHg (MAP 74 mmHg), respiratory rate 16/min, SpO₂ 98% on room air. Labs: uric acid 2.1 mg/dL (normalized from 18 mg/dL), K⁺ 4.0 mEq/L, PO₄ 3.2 mg/dL, Ca²⁺ 8.8 mg/dL, creatinine 0.9 mg/dL. Urine output has been >0.5 mL/kg/hr for 12 hours. The norepinephrine dose has remained stable at 0.02 mcg/kg/min for 12 hours. Given his clinical status and lab trends, which is the HIGHEST PRIORITY next step in de-escalating intensive therapies?

A 45-year-old man with newly diagnosed Burkitt lymphoma is admitted to the ICU. Over the past 12 hours he develops progressive somnolence, muscle twitching, and oliguria. Laboratory studies show: Na 138 mEq/L, K 6.8 mEq/L, Cl 102 mEq/L, HCO3 18 mEq/L, BUN 65 mg/dL, creatinine 3.2 mg/dL (baseline 0.9), total Ca 6.5 mg/dL (ionized 0.8 mmol/L), phosphate 8.9 mg/dL, and uric acid 15.4 mg/dL. ECG reveals peaked T waves. Which pathophysiologic mechanism is the MOST critical immediate contributor to his acute clinical deterioration that demands urgent intervention?

A 62-year-old man with newly diagnosed acute myeloid leukemia is admitted to the ICU for induction chemotherapy. He is intubated and on norepinephrine for septic shock. On hospital day 7, he develops fever to 39.2 °C and chills. His absolute neutrophil count is 150 cells/mm³. Baseline creatinine was 0.9 mg/dL; current creatinine is 2.8 mg/dL, corresponding to an estimated creatinine clearance of approximately 27 mL/min (Cockcroft-Gault). Because of febrile neutropenia in the setting of acute kidney injury and critical illness, the team plans empiric cefepime. Which of the following regimens, including loading and maintenance dosing with infusion strategy, is most appropriate?

A 62-year-old man with metastatic prostate cancer presents with 2 days of progressive lower extremity weakness, new urinary retention, and severe mid-thoracic back pain radiating to his legs. MRI of the spine demonstrates an epidural mass at T8–T9 causing significant spinal cord compression and edema. What is the MOST critical immediate management step to prevent irreversible neurological damage?

A 48-year-old male with acute myeloid leukemia (AML) undergoing induction chemotherapy is admitted to the critical care unit at 20:00 for evaluation of fever. He has had a continuous fever of 38.8°C for the past 24 hours, mild generalized fatigue, and denies chills or rigors. He is on 2 L/min nasal cannula for mild dyspnea and receiving IV fluids via a central line. He has no known drug allergies. Vital signs: blood pressure 128/78 mmHg, heart rate 92 bpm, respiratory rate 18 breaths/min, oxygen saturation 96% on 2 L NC. He has severe oral mucositis (CTCAE Grade 3) preventing adequate oral intake, and his absolute neutrophil count (ANC) is 50 cells/mm³, expected to remain below 100 cells/mm³ for at least 10 days. In this critical care setting, based on validated risk stratification tools and clinical contraindications, which of the following is the MOST appropriate initial management strategy?

A 62-year-old male with metastatic pancreatic adenocarcinoma is admitted to the ICU with septic shock secondary to febrile neutropenia. He is on assist-control ventilation and norepinephrine at 0.1 mcg/kg/min via a central line. Despite broad-spectrum antibiotics and aggressive fluids, his mean arterial pressure remains 60 mmHg and lactate is rising at 4.8 mmol/L. His oncologist reports rapidly declining performance status (ECOG 4) and widespread disease progression on recent imaging. The family at the bedside requests “everything to be done” but also recalls his wish to avoid prolonged suffering. The intensivist contemplates initiating renal replacement therapy for worsening acute kidney injury. Considering the patient’s clinical status, prognosis, and family’s concerns, which action best aligns with multidisciplinary goals-of-care principles?

A 62-year-old man with metastatic prostate cancer presents with progressive bilateral lower extremity weakness and urinary retention. MRI confirms malignant spinal cord compression at T10–T11. Neurosurgical evaluation is pending. As the critical care pharmacist, which initial pharmacologic treatment is most appropriate?

A 58-year-old man with acute myeloid leukemia complicated by tumor lysis syndrome is admitted to the ICU. He is mechanically ventilated and requires vasopressor support. Given his critical illness and high risk for multiple ICU complications, including delirium and immobility, which of the following interventions should be prioritized as the most impactful in preventing these complications?

A 48-year-old male with acute myeloid leukemia develops laboratory evidence of severe tumor lysis syndrome while receiving continuous renal replacement therapy for acute kidney injury. His labs show uric acid 18 mg/dL, potassium 6.2 mEq/L, phosphate 8.0 mg/dL, and calcium 6.5 mg/dL. Which initial pharmacologic approach BEST reduces his hyperuricemia in this setting?

A 48-year-old male with newly diagnosed acute myeloid leukemia is admitted to the medical ICU on continuous renal replacement therapy (CRRT) via a right internal jugular central line for acute kidney injury. He is also on assist-control ventilation due to progressive hypoxemia and increased work of breathing. Over the past 24 hours following initiation of chemotherapy, his laboratory values have worsened, showing potassium 7.1 mEq/L, phosphorus 8.9 mg/dL, uric acid 18 mg/dL, and creatinine 5.2 mg/dL (baseline 0.9). Despite CRRT, his ECG reveals new-onset peaked T waves and widened QRS complexes. The critical care team is discussing further management. Given the patient’s current clinical status and laboratory findings, which of the following supportive care interventions should be prioritized to address the most immediate life-threatening complication?