The application of the ratio of serum urea ni-trogen to creatinine(BUN/Cr)in identifying thesource of acute gastrointestinal hemorrhage wasreviewed in 194 cases.

• 采用血清尿素氮(BUN)/肌酐(Cr)值(mmol/mmol)对194例急性消化道出血患者的出血部位鉴别及影响因素进行了探讨。