sentences:  Clips have also been used to secure the placement of endoscopic feeding tubes, and to orient the bile duct to assist with endoscopic retrograde cholangiopancreatography, a procedure used to image to bile duct.Endoclips have been seen to dislodge between 1 and 3 weeks from deployment, although lengthy clip retention intervals of as high as 26 months have been reported.Endoclips are believed to be safe and no major complications (such as perforation or impaction) have been reported with them, although concern has been raised about blocking the outflow of the bile duct if clips are deployed in the duodenum.