Sir, We read with much interest the article by Dr. Yen regarding colonoscopic treatment of acute diverticular hemorrhage by use of endoclips. In the article the authors describe the peculiar technique of positioning hemoclips bridging the edge of the diverticulum. The clipping technique consists in applying the clip on the only fringe of the diverticular orifice, placing one prong within the adjacent mucosa and the other in the diverticulum, leaving its orifice open [1]. Although the authors did not declare any complication in the series presented, it is our opinion that such a manoeuver might be unreasonably dangerous. In fact, it is known that the wall of the diverticulum is constituted by a single mucosal layer, besides being inflamed. The introduction, mostly blind, of one of the two jaws of the clip into this cavity seems unnecessary. For several years it has been our policy to prefer compression hemostasis to injection techniques, to control diverticular bleeding. In a series of six patients recently treated, up to five hemoclips were sufficient to achieve hemostasis in all cases. Hemoclips were positioned bridging the entire diverticular orifice, in this way matching the two edges by compressing the entire enteric wall. In other words hemoclips are placed to close the whole diverticular orifice among the prongs of the clips. In this way it is possible to achieve both direct compression of the bleeding vessel, if running at the clipped edge, or at least indirect compression of the vessel. In no case was injection of any drug or any other treatment needed. One of these patients was a 77-year-old man admitted to ER for acute massive rectal bleeding. The patient was administered oral anticoagulant therapy for atrial fibrillation. Three years earlier he underwent a prophylactic left hemicolectomy for recurrent diverticulitis. On admission, hemoglobin was 9 mg/dl and INR was 2.01. Urgent colonoscopy revealed multiple diverticula throughout the entire colon with the presence of abundant blood and clots in all 70 cm of the remaining colon. A tightly adherent blood clot probably covering a diverticulum and significant blood spurting flow below it were seen 55 cm from anal verge, apparently in the transverse colon (Fig. 1a). The blood clot was removed by lavage, revealing underneath an actively bleeding diverticulum (Fig. 1b). Three hemoclips (Resolution clip; Microvasive Endoscopy, Boston Scentific, Natick, MA, USA) were placed across diverticulum until constant complete hemostasis was observed for 5 min. Hemoclips were placed to close the whole diverticular orifice among the prongs of the clips (Fig. 1c). Two hours later X-rays demonstrated no free air, and the three clips were in place distal to the hepatic flexure (Fig. 1d). No further rectal bleeding was observed, and hemoglobin levels increased to 10.5 mg/dl two days later, when the patient was discharged. Bleeding from colonic diverticula is the most common cause of acute lower gastrointestinal bleeding [2]. Despite advances in diagnostic and therapeutic technology, 10–25% of cases of lower gastrointestinal bleeding will require surgical intervention because of patient instability [3]. Colonoscopy enables simultaneous diagnosis and treatment; however, controversies exist concerning the clinical impact, timing, and modalities of application. Among the techniques available, only hemoclips treatment has been reported to control bleeding in 100% of cases [1]. This successful case series adds to those already published, A. Arezzo (&) M. Verra F. Cravero R. Reddavid M. Morino Digestive, Colorectal and Minimally Invasive Surgery, University of Turin, Corso Dogliotti 14, 10126 Turin, Italy e-mail: alberto.arezzo@unito.it
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