Postoperative gastrointestinal dysfunction (POGD), often referred to as postoperative ileus (POI) after colorectal surgery, is characterized by symptoms such as nausea, vomiting, abdominal distension, and delayed bowel movements. The incidence of this issue varies among medical institutions, impacting patient nutrition, prolonging hospital stays, and increasing healthcare costs. The complex pathogenesis of POGD involves a brief neurogenic phase (within 3 hours) and a more prolonged inflammatory phase (beginning at 3-4 hours and lasting for days). The inflammatory phase is crucial and is recognized as initiated by mast cells and damage-associated molecular patterns that activate macrophages in the intestinal muscle layer. Subsequently, it triggers a series of cascading inflammation reactions through the release of inflammatory factors and recruitment of inflammatory cells, which contributes to the development and exacerbation of POGD. Studies have demonstrated changes in inflammatory cells and factors in the abdominal fluid following abdominal surgery, emphasizing the clinical significance of analyzing drainage fluid to predict postoperative gastrointestinal function. This study analyzes inflammatory markers in drainage fluid following laparoscopic colorectal cancer surgery. The aim is to enhance the accuracy of predicting gastrointestinal recovery outcomes and contribute to the evolving field of Enhanced Recovery After Surgery (ERAS).
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Measurement of drainage fluid LDH and neutrophil to lymphocyte ratio (NLR) on postoperative day 1
Timeframe: Postoperative day 1