Abstract
PurposeTo evaluate the safety of including the bowel in the ice ball during cryoablation. Materials and MethodsForty-three patients who underwent 50 cryoablations between January 1, 2012, and February 1, 2023, were retrospectively reviewed and compared with a control cohort of those who underwent cryoablation without bowel involvement (n = 86). Adverse events (AEs) were stratified by the Society of Interventional Radiology (SIR) AE classification system, 2017 (1). AEs occurring within 12 months and factors that may affect the AE rate, such as degree of bowel involvement and portion of bowel involved, were reviewed. ResultsFourteen AEs occurred in 13 patients (13/43, 30.2%). This included 7 Grade 1 (7/43, 16.3%), 3 Grade 2 (3/43, 7.0%), and 4 Grade 3 (4/43, 9.3%) AEs. Of them, 1 Grade 3 AE was judged to be related to bowel involvement (1/43, 2.3%). When comparing AEs by degree of bowel wall involvement, there were more injuries with the full-thickness bowel wall cases (6/9, 66.7%) than with partial-thickness bowel wall cases, but the findings were not statistically significant (P = .140). When investigating AEs by portion of the intestine involved, it was found that 7 (7/14, 50%), 10 (10/17, 58.8%), and 4 (4/19, 21.1%, P = .055) were found when the stomach, small bowel, and large bowel were involved, respectively. No significant difference in AEs (13/43, 30.2%, vs 31/86, 36%; P = .511) or severe AEs (4/43, 9.3%, vs 9/86, 10.5%; P = .836) was found between the study and control cohorts. ConclusionsFindings from this single-center retrospective experience suggest that bowel wall involvement by the ice ball during cryoablation resulted in a lower-than-expected rate of AEs for bowel-related injuries.
Published Version
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