Intraoperative Fluoreszenzangiographie mit Indocyaningrün: Einfluss auf die Anastomoseninsuffizienzrate bei Rektumresektionen

Indocyanine Green Fluorescence Angiography and the Incidence of Anastomotic Leak After Colorectal Resection for Colorectal Cancer: A Meta-analysis

BACKGROUND

Anastomotic leak is a life-threatening complication of colorectal surgery. Recent studies showed that indocyanine green fluorescence angiography might be a method to prevent anastomotic leak.

OBJECTIVE

The purpose of this study was to investigate whether intraoperative indocyanine green fluorescence angiography can reduce the incidence of anastomotic leak.

DATA SOURCES

Potential relevant studies were identified from the following databases: PubMed, Embase, Web of Science, Cochrane Library, and China National Knowledge Infrastructure.

STUDY SELECTION

This meta-analysis included comparative studies investigating the association between indocyanine green fluorescence angiography and anastomotic leak in patients undergoing surgery for colorectal cancer where the diagnosis of anastomotic leak was confirmed by CT and the outcomes of the indocyanine green group were compared with a control group.

INTERVENTION

Indocyanine green was injected intravenously after the division of the mesentery and colon but before anastomosis.

MAIN OUTCOME MEASURES

The Newcastle-Ottawa Scale was used to assess methodologic quality of the studies. ORs and 95% CIs were used to assess the association between indocyanine green and anastomotic leak.

RESULTS

In 4 studies with a total sample size of 1177, comparing the number of anastomotic leaks in the indocyanine green and control groups, the ORs were 0.45 (95% CI, 0.18-1.12), 0.30 (95% CI, 0.03-2.98), 0.17 (95% CI, 0.01-3.69), and 0.12 (95% CI, 0.03-0.52). The combined OR was 0.27 (95% CI, 0.13-0.53). The difference was statistically significant (p < 0.001), and there was no significant heterogeneity (p = 0.48; I = 0).

LIMITATIONS

Data could not be pooled because of the small number of studies; some differences between studies may influence the results. Also, the pooled data were not randomized.

CONCLUSIONS

The result revealed that indocyanine green was associated with a lower anastomotic leakage rate after colorectal resection. However, larger, multicentered, high-quality randomized controlled trials are needed to confirm the benefit of indocyanine green fluorescence angiography.