The Risk Factor Analysis of Gallbladder Gangrene in Acute Acalculous Cholecystitis: A Single-Center Retrospective Study.

Objective: This research was performed to determine the risk factors for gallbladder gangrene in acute acalculous cholecystitis patients and to assess the predictive ability of inflammatory markers. Methods: The study included 226 acute acalculous cholecystitis patients who underwent laparoscopic cholecystectomy within 72 h of onset. The receiver operating characteristic curves were employed to determine the optimal cut-off, specificity, and sensitivity of inflammatory markers in predicting gangrenous cholecystitis. Logistic regression analysis was conducted to ascertain the independent risk factors associated with gallbladder gangrene. Results: The incidence rate of gallbladder gangrene in acute acalculous cholecystitis was 45.1% (102/226). Compared with other inflammatory markers, the systemic immune-inflammation index (SII) demonstrated superior predictive validity (vs. CRP, p = 0.021; vs. WBC, p < 0.001; vs. PCT, p = 0.004; vs. NLR, p < 0.001; vs. PLR, p < 0.001). The results of the logistic regression analysis revealed that platelet, PCT, SII, D-dimer, CA19-9, gallbladder enlargement, and gallbladder effusion were independent risk factors. Conclusion: This study found that platelet, PCT, SII, D-dimer, CA19-9, gallbladder enlargement, and gallbladder effusion were independent risk factors for gallbladder gangrene in acute acalculous cholecystitis. SII could serve as a novel, straightforward, and potent predictive indicator for gallbladder gangrene in acute acalculous cholecystitis.