A client with a history of severe diarrhea presents to the emergency department. Vital signs reveal a respiratory rate of 36 breaths per minute, heart rate 110 bpm, and blood pressure 90/60 mm Hg. Arterial blood gas results include: pH 7.30, PaCO2 29 mm Hg, PaO2 100 mm Hg, and HCO3- 21 mEq/L. How does the nurse interpret these findings?

The 68-year-old patient is admitted after 5 days of extremely foul-smelling watery diarrhea with a temperature of 37.9°C, heart rate 118 bpm, and blood pressure 98/52 mmHg. The patient’s recent medical history is significant for being treated 2 weeks ago for a diverticulitis flare-up. Upon assessment, the patient is pale, diaphoretic, and has a tense, distended abdomen that he does not guard with palpation. Lab studies reveal an elevated creatinine (1.9 mg/dL), high white blood cell count (20,000 cells/mL), and normal hemoglobin and hematocrit. The nurse prepares to perform which diagnostic test for this patient?  

During an assessment of the patient who just completed a cross-country flight, the nurse elicits a positive Homan's sign. Based on this finding, the nurse suspects which condition?