CIRSE Standards of Practice for the Classification of Complications: The Modified CIRSE Classification System

The CIRSE classification system was published in 2017 aiming to standardize the reporting of complications by avoiding subjective definitions and an excessive number of grades. The original system described 6 grades: Grade 1: complication could be solved within the same procedure, Grade 2: unplanned prolonged hospitalization 48 h, but no sequelae, Grade 4: mild sequelae beyond hospitalization, Grade 5: severe sequelae requiring assistance in daily life, and Grade 6: death.Following initial evaluation through a validation process performed during the International Conference on Complications in Interventional Radiology (ICCIR 2023), a need to modify the system was identified, specifically to stratify grades 1…