A 66-year-old male is seen pre-operatively for clearance for…

A 66-year-old male is seen pre-operatively for clearance for his right total knee replacement. Pre-operative exam includes routine labs and UA. These show mild normocytic normochromic anemia, normal electrolytes, slight elevation in BUN and SCr, and a GFR of 54. Urine is positive for protein. Past medical history includes diabetes, hypertension and chronic kidney disease. What stage is his chronic kidney disease currently?

A 30-year-old female receives a spinal MRI due to back pain….

A 30-year-old female receives a spinal MRI due to back pain. She has no additional symptoms. Her past medical history, social history, and family history are all non-contributory. The results show an incidental finding of a single renal cyst. Which is the correct statement regarding the next step?

A 66-year-old female with a history of congestive heart fail…

A 66-year-old female with a history of congestive heart failure presents to the ED with complaints of fatigue, nausea and vomiting. She reports she was out in the heat all day and has been sweating excessively. She has tried to drink fluids but has not been able to keep them down. She is concerned since she has not produced any urine for over 12 hours. Her SCr is 1.7 and her fractional excretion of sodium (FENa) is