system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Regarding FeNa, which of the following is true?
assistant
The correct answer is  Fractional excretion of sodium (FeNa) FeNa is the urine:plasma ratio of sodium divided by U:P of creatinine * 100 Neonates have higher FeNa because of tubular immaturity. FeNa is higher in preterm neonates due to immaturity of sodium reabsorptive capacity. FeNa may be affected by diuretics use. Classical lab findings in AKI- Type U Na FeNa Prerenal <10 <1% Intrinsic >20 >2% Postrenal >40 >4%