Introduction: The aim of this video is to describe our technique using fluorescence to assess the colorectal anastomosis perfusion in order to provide expertise to contribute to the standardization of this new tool.

Method: 76 years male, classified as ASA IV. Synchronous colorectal adenocarcinoma was diagnosed. Laparoscopic left colectomy with total excision of the mesocolon is practiced. At the time of preparing the proximal anastomotic margin, its perfusion is evaluated at 3 minutes after infusion of 0.4 mg / kg of indocyanine green (ICG) with an European system, using a visual nominal scale. The proximal margin is considered isofluorescent and no change in attitude occurs. The evaluation of the anastomotic perfusion by fluorescence is performed after 25 minutes of infusion of ICG and it is considered optimal (isofluorescent).

Results: No intraoperative or postoperative complications presented. No adverse effects were reported due to the infusion of ICG. The operating time was 185 minutes. He started oral tolerance on the same day of surgery, presented peristalsis the second postoperative day and was discharged on the seventh day after surgery.

Conclusion: Fluorescence angiography during colorectal surgery was feasible and reproducible with a minimum of added complexity. Analytic measures to objectively quantify signal intensity require investment for their development and correlation with clinical outcomes.

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