What were the electrolyte levels? Potassium, calcium, chloride and sodium values can get way out of range with kidney disfunction, and can cause symptoms such as seizures.
Kidney chemistry values are reflected in BUN and creatinine levels. Liver tests include SGPT and bilirubin. Do you have those values available?
A lower protein diet reduces nitrogen levels being fitered through the kidneys as a high concentration will contribute to pemanent kidney disfunction, especially when their function is already compromised.