CRP and chronic kidney disease: Preoperative lab work showed pathological values for creatinine of 3.61 milligrams/deciliter (mg/dL), an estimated glomerular filtration rate (GFR) according to the Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) of 15.2 mL/min/1.73 m2 and a urea level of 111 mg/dL with normal diuresis, C-reactive protein (CRP) of 1.22 mg/dL, a thyroid-stimulating hormone (TSH) level of 5.66 milliunits/liter (mU/L), and a potassium level of 3.47 millimole/L (mmol/L).