A 56-year-old woman without relevant medical history was admitted to the emergency
room with persistent lower left abdominal pain for the previous 15 days. Abdominal
computed tomography revealed diverticulosis of the left colon, with a 55-mm linear
foreign body in the sigmoid colon, located transversely to the colon axis, with thickening
of the bowel wall and adjacent fat, without perforation ([Fig. 1]). The patient was referred for endoscopic removal.
Fig. 1 Coronal abdominal computed tomography showing the chicken bone measuring 55 mm in
length located in the sigmoid colon, transversely oriented to the colon axis, without
signs of perforation.
The impacted bone was stuck crosswise, 30 cm from the anal verge, with both ends embedded
in diverticula on opposite walls ([Fig. 2]). Multiple removal attempts with a foreign body forceps were unsuccessful. We decided
to use a mechanical lithotripter to assist in endoscopic removal ([Video 1]).
Fig. 2 Endoscopic image of the chicken bone located crosswise, 30 cm from the anal verge,
with both ends embedded in diverticula on opposite walls.
Video 1 Use of mechanical lithotripter to assist in the endoscopic removal of an impacted
long chicken bone in sigmoid diverticula.
A 0.035-inch guidewire was looped around the bone by advancing the guidewire on one
side of the bone and capturing the distal tip on the other side. With the two ends
of the guidewire outside the anus, a lithotripter cable was advanced over the ends
until the tip reached the impacted bone. Lithotripter positioning on the center of
the bone was difficult due to angulation of the colon, with constant catching of the
mucosa near one end of the bone ([Fig. 3]). A foreign body forceps was used to grab the guidewire and position it centrally
while adjusting the lithotripter cable ([Fig. 4]). The lithotripter handle was then attached to the cable and progressively ratcheted
down until the guidewire cut through the bone. The bone could then be easily removed
with foreign body forceps ([Fig. 5]). Mucosal ulceration was seen, without contrast extravasation on fluoroscopy. The
patient was discharged home the following day without symptoms and remains well 4
months later.
Fig. 3 Constant catching of the mucosa near one end of the bone while positioning the lithotripter,
despite several changes in scope and patient position.
Fig. 4 Mobilization of the looped guidewire with a foreign body forceps onto the center
of the bone, while adjusting the lithotripter cable, to ensure closure without mucosal
entrapment.
Fig. 5 The retrieved foreign body after cutting one end of the bone with the mechanical
lithotripter.
Most foreign bodies can pass through the gastrointestinal tract without consequence,
but obstruction can occur [1]. The mechanical lithotripter-assisted technique [2] allowed us to cut the bone, facilitating subsequent removal without causing complications.
Endoscopy_UCTN_Code_TTT_1AQ_2AH
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