Drainage Fluid Biomarkers and Postoperative Gastrointestinal Dysfunction in Laparoscopic Colorectal Surgery

Drainage fluid was collected from patients on the first and third postoperative days to test the levels of three biochemical tests (albumin, lactate dehydrogenase \[LDH\], adenosine deaminase \[ADA\]).

Cytological examination of abdominal drainage fluid on the first postoperative day and the third postoperative day, calculation of neutrophil-lymphocyte ratio (NLR), lymphocyte-monocyte ratio (LMR), prognostic nutritional index (PNI)

Peripheral blood cytology tests on the first postoperative day and the third postoperative day, calculation of Neutrophil-lymphocyte ratio (NLR), lymphocyte-monocyte ratio (LMR), platelet lymphocyte ratio (PLR), systemic immunoinflammatory index (SII)