The over-the-scope (OTS) clip is a nitinol-based, shape-memory clip used for suturing
and hemostasis in the gastrointestinal tract [1]. When used for hemostasis of colonic diverticular bleeding (CDB), the OTS clip preserves
blood flow in the grasped tissue, potentially reducing the risk of delayed perforation
compared to methods such as endoscopic band ligation [2]. It has shown favorable outcomes as a first-line treatment for CDB [2]. However, data on salvage treatment for rebleeding after OTS clip placement remain
limited, with repeated OTS clip application, arterial embolization, and surgery being
the primary options [2]
[3]. This report describes a case in which endoscopic detachable snare ligation was
effective for rebleeding after OTS clip placement in CDB.
An 88-year-old woman presented to the emergency department with hematochezia and loss
of consciousness. An urgent colonoscopy identified a diverticulum with an exposed
vessel in the ascending colon, for which an OTS clip was applied ([Fig. 1]). However, the hematochezia and vital signs indicating shock recurred on the following
day. Repeat colonoscopy confirmed active bleeding from the OTS clip-treated site,
and hemostasis was achieved with endoscopic clipping ([Fig. 2], [Video 1]). Four days post-clipping, there was another episode of hematochezia with vital
signs indicating shock. Colonoscopy revealed clip detachment and a clot on the apex
of the diverticulum grasped by the OTS clip ([Fig. 3]). Placing a detachable snare over the OTS clip was challenging; however, by inserting
the tip of the snare into a gap within the OTS clip, the snare was stabilized, allowing
for successful ligation of the diverticulum ([Fig. 3], [Video 1]). The patient was discharged 4 days later without further rebleeding.
Fig. 1
a A diverticulum with an exposed vessel (white arrow) in the
ascending colon. b An OTS clip (yellow arrow) deployed to the
affected diverticulum, inverting and fixing it. Abbreviation: OTS, over-the-scope.
Fig. 2
a Colonoscopy performed after early rebleeding following
primary hemostasis with an OTS clip. The OTS clip remains in place, maintaining the
diverticulum in an inverted and bulging state, but active bleeding (yellow arrow)
is
observed from the apex. b Clipping was performed to stop the active
bleeding, achieving temporary hemostasis. Abbreviation: OTS, over-the-scope.
Fig. 3 Colonoscopy for rebleeding after clipping. a A clot is observed
at the apex of the OTS clip-inverted diverticulum (yellow arrow). b
The OTS clip-inverted diverticulum is ligated using a detachable snare. Abbreviation:
OTS,
over-the-scope.
Detachable snare ligation for an OTS clip-inverted colonic diverticulum.Video 1
Rebleeding after OTS clip placement poses a therapeutic challenge. Endoscopic detachable
snare ligation may be a feasible salvage option in such cases and potentially in other
gastrointestinal bleeding sites following OTS clip use.
Endoscopy_UCTN_Code_TTT_1AQ_2AZ
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