1/18 🤔Why is the BUN/Cr elevated in upper gastrointestinal bleeding? This question has been covered by @AdamRodmanMD and @WilliamAird4 but the lit

1/18 🤔Why is the BUN/Cr elevated in upper gastrointestinal bleeding? This question has been covered by @AdamRodmanMD and @WilliamAird4 but the lit