TY - JOUR
T1 - Clip placement to prevent delayed bleeding after colonic endoscopic mucosal resection (CLIPPER): study protocol for a randomized controlled trial
AU - Turan, Ayla S.
AU - Moons, Leon M. G.
AU - Schreuder, Ramon-Michel
AU - Schoon, Erik J.
AU - Terhaar sive Droste, Jochim S.
AU - Schrauwen, Ruud W. M.
AU - Straathof, Jan Willem
AU - Bastiaansen, Barbara A. J.
AU - Schwartz, Matthijs P.
AU - Hazen, Wouter L.
AU - Alkhalaf, Alaa
AU - Allajar, Daud
AU - Hadithi, Muhammed
AU - van der Spek, Bas W.
AU - Heine, Dimitri G. D. N.
AU - Tan, Adriaan C. I. T. L.
AU - de Graaf, Wilmar
AU - Boonstra, Jurjen J.
AU - Voogd, Fia J.
AU - Roomer, Robert
AU - de Ridder, Rogier J. J.
AU - on behalf of the Dutch EMR Study Group
AU - Kievit, Wietske
AU - Siersema, Peter D.
AU - Didden, Paul
AU - van Geenen, Erwin J. M.
N1 - Funding Information: The CLIPPER trial is investigator initiated and is financed by the Dutch Digestive Foundation (MLDS), a non-profit patient organization. Olympus (Japan) contributed Quick Clip Pro endoclips for this trial. The funders played and still play no active role in any part of the study design, conduct, or analysis. Publisher Copyright: © 2021, The Author(s). Copyright: Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2021/12/1
Y1 - 2021/12/1
N2 - Background: Endoscopic mucosal resection (EMR) for large colorectal polyps is in most cases the preferred treatment to prevent progression to colorectal carcinoma. The most common complication after EMR is delayed bleeding, occurring in 7% overall and in approximately 10% of polyps ≥ 2 cm in the proximal colon. Previous research has suggested that prophylactic clipping of the mucosal defect after EMR may reduce the incidence of delayed bleeding in polyps with a high bleeding risk. Methods: The CLIPPER trial is a multicenter, parallel-group, single blinded, randomized controlled superiority study. A total of 356 patients undergoing EMR for large (≥ 2 cm) non-pedunculated polyps in the proximal colon will be included and randomized to the clip group or the control group. Prophylactic clipping will be performed in the intervention group to close the resection defect after the EMR with a distance of < 1 cm between the clips. Primary outcome is delayed bleeding within 30 days after EMR. Secondary outcomes are recurrent or residual polyps and clip artifacts during surveillance colonoscopy after 6 months, as well as cost-effectiveness of prophylactic clipping and severity of delayed bleeding. Discussion: The CLIPPER trial is a pragmatic study performed in the Netherlands and is powered to determine the real-time efficacy and cost-effectiveness of prophylactic clipping after EMR of proximal colon polyps ≥ 2 cm in the Netherlands. This study will also generate new data on the achievability of complete closure and the effects of clip placement on scar surveillance after EMR, in order to further promote the debate on the role of prophylactic clipping in everyday clinical practice. Trial registration: ClinicalTrials.gov NCT03309683. Registered on 13 October 2017. Start recruitment: 05 March 2018. Planned completion of recruitment: 31 August 2021.
AB - Background: Endoscopic mucosal resection (EMR) for large colorectal polyps is in most cases the preferred treatment to prevent progression to colorectal carcinoma. The most common complication after EMR is delayed bleeding, occurring in 7% overall and in approximately 10% of polyps ≥ 2 cm in the proximal colon. Previous research has suggested that prophylactic clipping of the mucosal defect after EMR may reduce the incidence of delayed bleeding in polyps with a high bleeding risk. Methods: The CLIPPER trial is a multicenter, parallel-group, single blinded, randomized controlled superiority study. A total of 356 patients undergoing EMR for large (≥ 2 cm) non-pedunculated polyps in the proximal colon will be included and randomized to the clip group or the control group. Prophylactic clipping will be performed in the intervention group to close the resection defect after the EMR with a distance of < 1 cm between the clips. Primary outcome is delayed bleeding within 30 days after EMR. Secondary outcomes are recurrent or residual polyps and clip artifacts during surveillance colonoscopy after 6 months, as well as cost-effectiveness of prophylactic clipping and severity of delayed bleeding. Discussion: The CLIPPER trial is a pragmatic study performed in the Netherlands and is powered to determine the real-time efficacy and cost-effectiveness of prophylactic clipping after EMR of proximal colon polyps ≥ 2 cm in the Netherlands. This study will also generate new data on the achievability of complete closure and the effects of clip placement on scar surveillance after EMR, in order to further promote the debate on the role of prophylactic clipping in everyday clinical practice. Trial registration: ClinicalTrials.gov NCT03309683. Registered on 13 October 2017. Start recruitment: 05 March 2018. Planned completion of recruitment: 31 August 2021.
KW - Clip artifact
KW - Colonic polyp
KW - Delayed bleeding
KW - EMR
KW - Prophylactic clipping
UR - http://www.scopus.com/inward/record.url?scp=85100129068&partnerID=8YFLogxK
U2 - https://doi.org/10.1186/s13063-020-04996-7
DO - https://doi.org/10.1186/s13063-020-04996-7
M3 - Article
C2 - 33461579
SN - 1745-6215
VL - 22
JO - Trials
JF - Trials
IS - 1
M1 - 63
ER -