PMC9842854_01
Left knotted ureteric stent on abdominal x-ray.
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Xray demonstrated a knot at the proximal coil of the stent, which was pulled down into the proximal ureter (Fig. 1.).
Attempted retrieval of knotted stent with 6 x 40mm PET balloon.
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An attempt to dislodge the knotted stent up into the renal pelvis by inflating a 6 x 40mm balloon distal to the knot and pulling it up was also unsuccessful (Fig. 2.) Finally, a "loop-snare" technique was utilized by threading a Glidewire through the superior loop of the knot, snaring the wire and retracting the snared wire which ultimately untied the knot and retrieved the stent (Fig. 3.).
Retrieval of knotted stent with snare-wire technique.
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An attempt to dislodge the knotted stent up into the renal pelvis by inflating a 6 x 40mm balloon distal to the knot and pulling it up was also unsuccessful (Fig. 2.) Finally, a "loop-snare" technique was utilized by threading a Glidewire through the superior loop of the knot, snaring the wire and retracting the snared wire which ultimately untied the knot and retrieved the stent (Fig. 3.).