Background and aims: Endoscopic ultrasound (EUS) guided coil plus glue injection has emerged as a safe and effective modality for gastric varices (GV). Very few studies have compared EUS embolization with direct endoscopic glue injection (EGI) technique for its safety and effectiveness. In this systematic review and meta-analysis, we aim to compare the outcomes of EUS-guided coil plus glue injection versus EGI.
Methods: Medline, Embase, and Cochrane databases were searched for studies that compared EUS and EGI for GV. A total of 1,454 articles were screened following the PRISMA protocol. Endpoints were pulmonary embolism, rebleeding rate, reintervention rate, technical success, abdominal pain, and mortality rate. A restricted maximum likelihood random-effects model with odds ratios (OR) and 95% confidence intervals (CI) was employed for binary endpoints. Heterogeneity was evaluated through Cochrane's Q statistic and Higgins and Thompson's I2 statistic. Significance was defined as a p-value < 0.05.
Results: We included six studies with a total of 445 patients treated for gastric varices. The mean age of patients was 49 years, and 43% were female. EUS was associated with a reduction in rebleeding rate (OR 0.22; 95% CI 0.11 to 0.45; p<0.001; I2=0) and in reintervention rates (OR 0.29; 95% CI 0.09 to 0.89; p=0.03; I2=49%) compared with EGI. There were no differences between groups in pulmonary embolism (OR 0.34; 95% CI 0.10 to 1.18; p=0.09; I2=0%), mortality rate (OR 0.78; 95% CI 0.28 to 2.13; p=0.63; I2=0%), technical success (OR 3.50; 95% CI 0.60 to 20.49; p=0.16; I2=0%), fever (OR 1.49 days; 95% CI 0.42 to 5.21 days; p=0.5; I2=0%), and abdominal pain (OR 0.96; 95% CI 0.31 to 2.95; p=0.94; I2=32%).
Conclusion: In patients with gastric varices, EUS-guided coil plus glue injection is associated with lower rebleeding and reintervention rate than EGI with no difference in pulmonary embolization rate, reintervention, abdominal pain, technical success, and mortality rate.
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