A new meta-analysis published in The Lancet Gastroenterology & Hepatology offers compelling evidence that a digital visualization tool significantly reduces complications following colorectal surgery. The research, led by University College Dublin (UCD), demonstrates a 40% reduction in the risk of anastomotic leak – a serious and potentially life-threatening complication – when surgeons utilize indocyanine green fluorescence angiography (ICGFA) during procedures, particularly in rectal cancer surgery. This marks a substantial step forward in surgical precision and patient safety, offering a more reliable method for assessing the quality of bowel connections after cancer removal.
Colorectal cancer remains a major global health concern, ranking as the third most common cancer worldwide, according to the World Health Organization. While surgical resection is often the primary treatment, the procedure carries inherent risks. Anastomotic leak, where the rejoined sections of the bowel fail to heal properly, occurs in as many as one in four patients undergoing colorectal surgery, leading to sepsis and increased morbidity, and mortality. Improving surgical techniques to minimize this risk has been a long-standing priority for surgeons.
Visualizing Success: How ICGFA Works
ICGFA is a digital tool that allows surgeons to visually assess blood flow – or perfusion – to the bowel segments being connected during surgery. Adequate blood supply is critical for proper healing. The technique involves injecting a fluorescent dye, indocyanine green, and then using a special camera to visualize its distribution in the tissue. Areas with poor perfusion appear darker, alerting the surgeon to potential problems. This allows for real-time adjustments, such as revising the surgical technique or opting for a different section of bowel, to ensure a secure and well-perfused connection.
While previous studies had suggested the benefits of ICGFA, a definitive conclusion required a large-scale, rigorous analysis. “Although evidence of the benefits of ICGFA had been promising to date, no single randomised controlled trial (RCT) has provided unequivocal proof of usefulness,” explained Professor Ronan Cahill, Director of the UCD Centre for Precision Surgery and lead author of the study. To address this, Cahill and his team conducted a PRISMA-compliant meta-analysis, pooling data from nine randomized controlled trials encompassing a total of 4,754 patients.
A 40% Reduction in Anastomotic Leaks
The results of the meta-analysis were clear: the use of ICGFA reduced the risk of anastomotic leak by 40% in patients undergoing colorectal surgery, with a particularly pronounced effect in rectal cancer cases. This finding represents a significant improvement in surgical outcomes and has the potential to reduce the burden of complications for patients. “Of the broad areas of innovations and advances in colorectal surgery over the past 20 years, ICGFA is now proven as the most useful added step that colorectal surgeons can make in ensuring safety and highest quality outcomes during cancer and other resectional operations,” Professor Cahill stated.
The study’s findings have been met with enthusiasm from the surgical community. Professor Jan Watanabe, a co-author from Kansai Medical University in Japan, emphasized the turning point this research represents. “This study marks an important turning point in colorectal surgery. The accumulated randomised evidence now clearly shows that intraoperative ICG fluorescence imaging can reduce anastomotic leakage, shifting the focus from proving efficacy to implementing this technology in routine surgical practice.”
Beyond Improved Outcomes: Documentation and Future AI Applications
The benefits of ICGFA extend beyond simply reducing leak rates. The technique provides a documented record of the surgeon’s assessment of bowel perfusion during the operation, offering a valuable tool for quality control and surgical training. The data generated by ICGFA could potentially be used to develop artificial intelligence (AI) tools to further refine surgical decision-making. “Excitingly, this type of digital decision support paves the way for additional AI tools that can advance next generation surgery for patients by improving individualised decision-making during high risk operations,” Cahill added.
Professor David Jayne, from the University of Leeds, UK, and another co-author, highlighted the practical implications of the research. “This timely and rigorously performed meta-analysis now provides indisputable evidence of the benefit. It will be welcomed by clinicians and policy makers as the evidence needed to change practice and reduce the burden of this life-threatening complication for patients.” Dr. Denise Hilling, from Leiden University Medical Center, echoed this sentiment, stating that the focus should now shift towards wider adoption of the technology among surgeons treating patients undergoing left-sided and rectal colorectal surgery.
The research team believes that the systematic review will serve as a guide for clinicians and inform the development of clinical guidelines regarding best practices in colorectal surgery. The underlying principle of ICGFA – using real-time visualization to assess tissue perfusion – also holds promise for the development of future AI-powered surgical tools.
The study’s findings are published in the February 2026 issue of The Lancet Gastroenterology & Hepatology. You can read the full article here.
Disclaimer: This article provides information for general knowledge and informational purposes only, and does not constitute medical advice. We see essential to consult with a qualified healthcare professional for any health concerns or before making any decisions related to your health or treatment.
Looking ahead, the focus will be on integrating ICGFA into standard surgical protocols and exploring its potential for use in other surgical specialties. Further research will also investigate the development of AI-driven tools based on ICGFA data to personalize surgical approaches and optimize patient outcomes. What are your thoughts on the role of technology in improving surgical precision? Share your comments below.
