Browsing by Author "Pellise, Maria"

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    Clip Closure Prevents Bleeding After Endoscopic Resection of Large Colon Polyps in a Randomized Trial
    (Elsevier, 2019-10) Pohl, Heiko; Grimm, Ian S.; Moyer, Matthew T.; Hasan, Muhammad K.; Pleskow, Douglas; Elmunzer, B. Joseph; Khashab, Mouen A.; Sanaei, Omid; Al-Kawas, Firas H.; Gordon, Stuart R.; Mathew, Abraham; Levenick, John M.; Aslanian, Harry R.; Antaki, Fadi; von Renteln, Daniel; Crockett, Seth D.; Rastogi, Amit; Gill, Jeffrey A.; Law, Ryan J.; Elias, Pooja A.; Pellise, Maria; Wallace, Michael B.; Mackenzie, Todd A.; Rex, Douglas K.; Medicine, School of Medicine
    Background & aims: Bleeding is the most common severe complication after endoscopic mucosal resection of large colon polyps and is associated with significant morbidity and cost. We examined whether prophylactic closure of the mucosal defect with hemoclips after polyp resection reduces the risk of bleeding. Methods: We performed a multicenter, randomized trial of patients with a large nonpedunculated colon polyp (≥20 mm) at 18 medical centers in North America and Spain from April 2013 through October 2017. Patients were randomly assigned to groups that underwent endoscopic closure with a clip (clip group) or no closure (control group) and followed. The primary outcome, postprocedure bleeding, was defined as a severe bleeding event that required hospitalization, a blood transfusion, colonoscopy, surgery, or another invasive intervention within 30 days after completion of the colonoscopy. Subgroup analyses included postprocedure bleeding with polyp location, polyp size, or use of periprocedural antithrombotic medications. We also examined the risk of any serious adverse event. Results: A total of 919 patients were randomly assigned to groups and completed follow-up. Postprocedure bleeding occurred in 3.5% of patients in the clip group and 7.1% in the control group (absolute risk difference [ARD] 3.6%; 95% confidence interval [CI] 0.7%-6.5%). Among 615 patients (66.9%) with a proximal large polyp, the risk of bleeding in the clip group was 3.3% and in the control group was 9.6% (ARD 6.3%; 95% CI 2.5%-10.1%); among patients with a distal large polyp, the risks were 4.0% in the clip group and 1.4% in the control group (ARD -2.6%; 95% CI -6.3% to -1.1%). The effect of clip closure was independent of antithrombotic medications or polyp size. Serious adverse events occurred in 4.8% of patients in the clip group and 9.5% of patients in the control group (ARD 4.6%; 95% CI 1.3%-8.0%). Conclusions: In a randomized trial, we found that endoscopic clip closure of the mucosal defect following resection of large colon polyps reduces risk of postprocedure bleeding. The protective effect appeared to be restricted to large polyps located in the proximal colon.
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    Dye-based chromoendoscopy for the detection of colorectal neoplasia: meta-analysis of randomized controlled trials.
    (Elsevier, 2022) Antonelli, Giulio; Correale, Loredana; Spadaccini, Marco; Maselli, Roberta; Bhandari, Pradeep; Bisschops, Raf; Cereatti, Fabrizio; Dekker, Evelien; East, James E.; Iacopini, Federico; Jover, Rodrigo; Kiesslich, Ralph; Pellise, Maria; Sharma, Prateek; Rex, Douglas K.; Repici, Alessandro; Hassan, Cesare; Medicine, School of Medicine
    Background and Aims Dye-Based chromoendoscopy (DBC) could be effective in increasing adenoma detection rate (ADR) in patients undergoing colonoscopy, but the technique is time-consuming and its uptake is limited. We aimed to assess the effect of DBC on ADR based on available randomized controlled trials (RCTs). Methods Four databases were searched up to April 2022, for RCTs comparing DBC with conventional colonoscopy (CC) in terms of ADR, advanced ADR, and sessile serrated adenoma (SSA) detection rates as well as the mean number of adenomas per patient (MAP) and non-neoplastic lesions. Relative risk (RR) for dichotomous outcomes and mean difference (MD) for continuous outcomes were calculated using random-effect models. I2 test was used for quantifying heterogeneity. Risk of bias was evaluated with Cochrane tool. Results Overall, 10 RCTs (5,334 patients) were included. Indication for colonoscopy was screening or surveillance (3 studies), and mixed (7 studies). Pooled ADR was higher in the DBC group vs. CC group, (48.1%[41.4-54.8%] vs 39.3%[33.5-46.4%]; RR=1.20[1.11- 1.29]), with low heterogeneity (I2=29%). This effect was consistent for advanced ADR (RR=1.21[1.03-1.42] I2=0.0%), and for SSA (6.1% vs 3.5%; RR, 1.68; [1.15-2.47]; I2=9.8%), as well as for MAP (MD 0.24 [0.17–0.31]) overall and in the right colon (MD, 0.28 [0.14-0.43]. High-definition white-light colonoscopy (HDWL) was more effective than standard white-light colonoscopy (SDWL) for detection of adenomas (51.6% 95% CI:47.1-56.1% vs. 34.2%; 95% CI:28.5-40.4%) and DBC (59.1%; 95% CI:54.7-63.3%) was more effective than HDWL (RR=1.14; 95% CI:1.06-1.23, I2= 0.0%]. Conclusions Meta-analysis of RCTs showed that DBC increases key quality parameters in colonoscopy, supporting its use in every-day clinical practice.
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    Effects of Blended (Yellow) vs Forced Coagulation (Blue) Currents on Adverse Events, Complete Resection, or Polyp Recurrence After Polypectomy in a Large Randomized Trial
    (Elsevier, 2020-07) Pohl, Heiko; Grimm, Ian S.; Moyer, Matthew T.; Hasan, Muhammad K.; Pleskow, Douglas; Elmunzer, B. Joseph; Khashab, Mouen A.; Sanaei, Omid; Al-Kawas, Firas H.; Gordon, Stuart R.; Mathew, Abraham; Levenick, John M.; Aslanian, Harry R.; Antaki, Fadi; von Renteln, Daniel; Crockett, Seth D.; Rastogi, Amit; Gill, Jeffrey A.; Law, Ryan J.; Elias, Pooja A.; Pellise, Maria; Mackenzie, Todd A.; Rex, Douglas K.; Medicine, School of Medicine
    Background & aims: There is debate over the type of electrosurgical setting that should be used for polyp resection. Some endoscopists use a type of blended current (yellow), whereas others prefer coagulation (blue). We performed a single-blinded, randomized trial to determine whether type of electrosurgical setting affects risk of adverse events or recurrence. Methods: Patients undergoing endoscopic mucosal resection of nonpedunculated colorectal polyps 20 mm or larger (n = 928) were randomly assigned, in a 2 × 2 design, to groups that received clip closure or no clip closure of the resection defect (primary intervention) and then to either a blended current (Endocut Q) or coagulation current (forced coagulation) (Erbe Inc) (secondary intervention and focus of the study). The study was performed at multiple centers, from April 2013 through October 2017. Patients were evaluated 30 days after the procedure (n = 919), and 675 patients underwent a surveillance colonoscopy at a median of 6 months after the procedure. The primary outcome was any severe adverse event in a per patient analysis. Secondary outcomes were complete resection and recurrence at first surveillance colonoscopy in a per polyp analysis. Results: Serious adverse events occurred in 7.2% of patients in the Endocut group and 7.9% of patients in the forced coagulation group, with no significant differences in the occurrence of types of events. There were no significant differences between groups in proportions of polyps that were completely removed (96% in the Endocut group vs 95% in the forced coagulation group) or the proportion of polyps found to have recurred at surveillance colonoscopy (17% and 17%, respectively). Procedural characteristics were comparable, except that 17% of patients in the Endocut group had immediate bleeding that required an intervention, compared with 11% in the forced coagulation group (P = .006). Conclusions: In a randomized trial to compare 2 commonly used electrosurgical settings for the resection of large colorectal polyps (Endocut vs forced coagulation), we found no difference in risk of serious adverse events, complete resection rate, or polyp recurrence. Electrosurgical settings can therefore be selected based on endoscopist expertise and preference.