Acute Kidney Injury with Hyperkalemia Case Study

10:00: 72-year-old male presents with severe nausea, vomiting, and diarrhea for 3 days. Patient reports feeling 'weak all over' and lightheaded. Voiding very small amounts of dark amber urine. History of hypertension, heart failure, and benign prostatic hyperplasia. Current medications include lisinopril, furosemide, and spironolactone. Skin turgor is poor; mucous membranes are dry. Alert and oriented x3.