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Background <p>Intraoperative assessment of aneurysm clipping remains technically challenging, particularly in identifying misclippings, aneurysmal remnants, and vessel compromise. Indocyanine green videoangiography (ICG-VA) provides real-time visualization but lacks hemodynamic quantification. FLOW 800 is a semi quantitative analysis tool that enhances blood flow evaluation. This meta-analysis aims to evaluate the combined diagnostic efficacy of ICG-VA and FLOW 800 in intracranial aneurysm surgery, focusing on intraoperative outcomes.</p> Methods <p>A systematic review was conducted in five databases (PubMed, Embase, Scopus, Web of Science, CENTRAL). The protocol was registered in PROSPERO (CRD420251014600). Twelve studies were included in the qualitative synthesis (344 aneurysms), of which eight contributed quantitative data to the meta-analysis (277 aneurysms). Pooled proportions of misclipping, aneurysmal remnant, vascular stenosis/occlusion, and clip repositioning were calculated using a random-effects model. Subgroup analyses, meta-regression, leave-one-out sensitivity analysis, and assessment of publication bias (funnel plot) were performed. Risk of bias was assessed using the QUADAS-2 tool.</p> Results <p>The pooled intraoperative detection rates using ICG-VA and FLOW 800 were: misclipping 9.36% (95% CI: 4.75–17.64), aneurysm remnant 6.55% (95% CI: 3.29–12.65), vessel stenosis or occlusion 6.90% (95% CI: 3.28–13.96), and clip repositioning 8.13% (95% CI: 4.05–15.63). Retrospective studies showed higher detection rates than prospective ones. Meta-regression identified study design as a significant predictor for all outcomes (<i>p</i> &lt; 0.0001), while older patient age was associated with increased remnant detection (<i>p</i> = 0.0247) and clip repositioning (<i>p</i> = 0.0073). Funnel plots revealed slight asymmetry, and GRADE evaluation indicated moderate certainty for misclipping and clip repositioning, and low certainty for remnants and stenosis.</p> Conclusions <p>The combined use of ICG-VA and FLOW 800 enhances the intraoperative detection of misclipping, residual aneurysm, and flow disturbances not evident with ICG-VA alone. These findings support its role as a complementary intraoperative tool. However, due to limited validation against angiographic standards, it should not replace DSA. Further prospective studies are warranted to confirm its clinical utility and encourage broader adoption in neurosurgical practice.</p>

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Efficacy of intraoperative indocyanine green videoangiography (ICG-VA) and FLOW 800 in the surgical management of intracranial aneurysms: a systematic review and meta-analysis

  • 期刊论文

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  • 发表日期：

    2026年1月26日

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  • Albert Gabriel Turpo-Pequeña,
  • Santiago Alejandro Santos-Vargas,
  • Harlly Romed Loza-Chipa,
  • Francisco Martins Lamas,
  • George Alejandro Espinoza-Laura,
  • Claudia Solange Núñez-Basurco,
  • Diego Napoleon Medina-Neira,
  • Valeria Alejandra Benites-Bustamante,
  • Rayza Ruth Osorio-Pacheco,
  • Josue Rodrigo Turpo-Peqqueña,
  • Gladys Huanca-Quispe,
  • Cristhian Adolfo Vizcarra-Vizcarra,
  • Badhin Gómez,
  • Julian Alejandro Rivillas,
  • Richard Hernández-Mayori

摘要

Background

Intraoperative assessment of aneurysm clipping remains technically challenging, particularly in identifying misclippings, aneurysmal remnants, and vessel compromise. Indocyanine green videoangiography (ICG-VA) provides real-time visualization but lacks hemodynamic quantification. FLOW 800 is a semi quantitative analysis tool that enhances blood flow evaluation. This meta-analysis aims to evaluate the combined diagnostic efficacy of ICG-VA and FLOW 800 in intracranial aneurysm surgery, focusing on intraoperative outcomes.

Methods

A systematic review was conducted in five databases (PubMed, Embase, Scopus, Web of Science, CENTRAL). The protocol was registered in PROSPERO (CRD420251014600). Twelve studies were included in the qualitative synthesis (344 aneurysms), of which eight contributed quantitative data to the meta-analysis (277 aneurysms). Pooled proportions of misclipping, aneurysmal remnant, vascular stenosis/occlusion, and clip repositioning were calculated using a random-effects model. Subgroup analyses, meta-regression, leave-one-out sensitivity analysis, and assessment of publication bias (funnel plot) were performed. Risk of bias was assessed using the QUADAS-2 tool.

Results

The pooled intraoperative detection rates using ICG-VA and FLOW 800 were: misclipping 9.36% (95% CI: 4.75–17.64), aneurysm remnant 6.55% (95% CI: 3.29–12.65), vessel stenosis or occlusion 6.90% (95% CI: 3.28–13.96), and clip repositioning 8.13% (95% CI: 4.05–15.63). Retrospective studies showed higher detection rates than prospective ones. Meta-regression identified study design as a significant predictor for all outcomes (p < 0.0001), while older patient age was associated with increased remnant detection (p = 0.0247) and clip repositioning (p = 0.0073). Funnel plots revealed slight asymmetry, and GRADE evaluation indicated moderate certainty for misclipping and clip repositioning, and low certainty for remnants and stenosis.

Conclusions

The combined use of ICG-VA and FLOW 800 enhances the intraoperative detection of misclipping, residual aneurysm, and flow disturbances not evident with ICG-VA alone. These findings support its role as a complementary intraoperative tool. However, due to limited validation against angiographic standards, it should not replace DSA. Further prospective studies are warranted to confirm its clinical utility and encourage broader adoption in neurosurgical practice.