Signs and symptoms of a Renal Failure first appear when Renal function deteriorates by more than:: (A) 20%, (B) 40%, (C) 60%, (D) 80%
Answer is C. Answer is C (>60%): Signs of renal failure become apparent when renal function deteriorates by more than 60% ( residual renal function between 20-50%) while ove symptoms usually develop only after renal function has deteriorated by >75 - 80% (residual renal function <20%)