RESUMEN
INTRODUCTION: Gastrointestinal (GI) bleeding stemming from malignant tumors is increasingly recognized, due to advancements in oncology and detection methods. Traditional endoscopic hemostatic techniques have shown variable success rates in managing hemorrhagic GI neoplasms. Hemospray, an emerging endoscopic hemostatic powder, offers promise in treating upper GI bleeding, potentially extending its utility to neoplastic bleeding sites. This meta-analysis aims to evaluate Hemospray's efficacy in managing bleeding related to GI tumors. METHODS: We searched Embase, Scopus, Web of Science, Medline/PubMed, and Cochrane. Inclusion criteria encompassed studies focusing on malignancy-related GI bleeding and interventions utilizing Hemospray. Comparative studies contrasted Hemospray with standard endoscopic treatments (SET), while noncomparative studies assessed Hemospray's efficacy independently. The risk of bias was assessed using appropriate tools, and statistical analyses were performed using Review Manager and open Meta analyst software. RESULTS: We included 19 studies in our meta-analysis. Hemospray demonstrated higher rates of immediate hemostasis compared to SET (odds ratio: 17.14, 95% confidence interval: 4.27-68.86), with consistent outcomes across studies. Rebleeding rates at 14 and 30 days were comparable between Hemospray and SET groups, suggesting similar efficacy in long-term hemostasis. Hemospray showed a significantly lower need for nonendoscopic hemostasis compared to SET (odds ratio: 0.51, 95% confidence interval: 0.30-0.87), indicating a potential reduction in supplementary interventions. Safety assessments revealed no confirmed adverse events directly linked to Hemospray. CONCLUSION: This meta-analysis highlights Hemospray's efficacy in achieving immediate hemostasis in GI tumor-related bleeding, with potential benefits in reducing supplementary interventions and improving patient outcomes. Despite comparable rebleeding rates, Hemospray emerges as a valuable adjunctive therapy in managing malignant GI bleeding.
RESUMEN
Artemisinin (ART) combination therapy is the main treatment for malaria. Pfk13 mutations (or K13 mutations, Kelch 13) are associated with ART resistance. This study aims to conduct a systematic review and meta-analysis of the prevalence of K13 mutations with ART resistance in malaria-endemic countries. An electronic search of studies in 2018 and a manual search in 2020 were performed to identify relevant studies. The risk of bias was assessed using the National Institutes of Health (NIH) quality assessment tool for observational cohort and cross-sectional studies. Data analysis was performed using R 4.1.0. Heterogeneity was estimated using the statistic I2 and Cochran Q test. A total of 170 studies were included in our review. Of these, 55 studies investigated the prevalence of K13 mutations in Southeast Asia. The meta-analysis showed that Southeast Asia had the highest prevalence of K13 mutations, whereas Africa, South America, Oceania, and other Asian countries outside Southeast Asia had a low prevalence of K13 mutations. The C580Y mutation was the most common in Southeast Asia with 35.5% (95%CI: 25.4-46.4%), whereas the dominant mutation in Africa was K189T (22.8%, 95%CI: 7.6-43.2%). This study revealed the emergence of ART resistance associated with K13 mutations in Southeast Asia. The diversity of each type of K13 mutation in other regions was also reported.