To investigate the role of creatinine monitoring in the diagnosis of urinary tract injury and urinary leakage after complicated abdominal pelvic surgery.

The data of 33 patients with urinary tract injury and urinary leakage after abdominal and pelvic surgery in Zhuhai People's Hospital from January 2015 to June 2021 were retrospectively reviewed, and 33 patients without urinary tract injury after abdominal and pelvic surgery in the hospital during the same period were matched. The creatinine of drainage fluid and the ratio of drainage to blood creatinine were compared between the 2 groups.

There was no difference of blood creatinine between the two groups. The creatinine of drainage fluid 2 754(2 133) μmol/L and drainage fluid/blood 33(57) in the urinary tract injury group were significantly higher than those in the non-urinary tract injury group 101(61) μmol/L, 0.99(0.32) (P<0.001).

Monitoring the creatinine of drainage fluid and drainage fluid/blood creatinine ratio after abdominal pelvic surgery is very accurate for the diagnosis of postoperative urinary tract injury, which is a convenient and effective diagnostic method.