Endoscopy 2022; 54(09): E496-E497
DOI: 10.1055/a-1640-8829
E-Videos

A unique technique for the removal of threaded biliary inside plastic stents

Masataka Yokode
Department of Gastroenterology and Hepatology, Graduate School of Medicine, Kyoto University, Kyoto
,
Department of Gastroenterology and Hepatology, Graduate School of Medicine, Kyoto University, Kyoto
,
Norimitsu Uza
Department of Gastroenterology and Hepatology, Graduate School of Medicine, Kyoto University, Kyoto
,
Department of Gastroenterology and Hepatology, Graduate School of Medicine, Kyoto University, Kyoto
,
Takeshi Kuwada
Department of Gastroenterology and Hepatology, Graduate School of Medicine, Kyoto University, Kyoto
,
Masahiro Shiokawa
Department of Gastroenterology and Hepatology, Graduate School of Medicine, Kyoto University, Kyoto
,
Hiroshi Seno
Department of Gastroenterology and Hepatology, Graduate School of Medicine, Kyoto University, Kyoto
› Author Affiliations
 

A 48-year-old woman underwent living donor liver transplantation (LDLT) for primary sclerosing cholangitis 10 years ago. To manage a refractory anastomotic biliary stricture after LDLT, a plastic stent was placed in the bile duct as an inside stent (above the sphincter of Oddi) and endoscopic retrograde cholangiography (ERCP) was performed periodically for inside stent replacement. Most recently, a nylon-threaded plastic stent (8.5-Fr × 9-cm; Through & Pass; Gadelius Medical, Tokyo, Japan) had been placed as an inside stent across the biliary stricture 6 months previously ([Fig. 1] and [Fig. 2]). Duodenoscopy now identified the thread that was emerging into the duodenum ([Fig. 3]). In our technique, first, the thread was gripped using a rotatable grasping forceps (FG-44NR-1; Olympus, Tokyo, Japan) ([Fig. 4]). Second, the grasping forceps was slowly rotated to roll the thread as if twirling spaghetti with a fork. The inside stent gradually moved toward the papilla as the forceps was being rotated and was then removed through the endoscope ([Video 1]). Finally, a new inside stent (Through & Pass) of the same size as the previous one was placed across the stricture. The procedure was completed without complications.

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Fig. 1 Image of a threaded inside plastic stent (Through & Pass; Gadelius Medical, Tokyo, Japan).
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Fig. 2 Endoscopic retrograde cholangiography images showing: a the refractory biliary stricture after living donor liver transplantation (white arrowheads); b the inside stent previously placed across the biliary stricture (yellow arrowheads).
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Fig. 3 Duodenoscopy image showing the thread of the inside stent (white arrowheads).
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Fig. 4 Image of the rotatable grasping forceps (FG-44NR-1) that was used to grip the thread, before rotating to roll the thread and pull the stent toward the papilla.

Video 1 Video showing the inside stent removal procedure. The duodenoscopy view shows the inside stent thread being tightly rolled around the forceps, pulling the stent to the papilla for removal.


Quality:

Benign biliary strictures are a clinically common and serious complication, occurring in 30 %–40 % of patients undergoing LDLT [1] [2]. Inside stents have long-term patency compared with conventional stents that are placed across the duodenal papilla, because of their reduced reflux of duodenal contents [3] [4]. This suggests that inside stent placement might be the first-line treatment for post-LDLT biliary strictures. Recently, threaded inside stents have become commercially available to facilitate inside stent removal; however, because the thread is made of nylon, it may slip if it is merely grabbed. Because the thread can be difficult to grasp with a device or can break, stent removal can be difficult. The method presented in this report appears safer and more reliable than merely grabbing the thread.

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Correction

A unique technique for the removal of threaded biliary inside plastic stents
Yokode M, Matsumori T, Uza N et al. A unique technique for the removal of threaded biliary inside plastic stents. Endoscopy 2021, doi:10.1055/a-1640-8829
In the above-mentioned article, the institution of the authors has been corrected. This was corrected in the online version on October 21, 2021.


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Competing interests

The authors declare that they have no conflict of interest.


Corresponding author

Tomoaki Matsumori, MD, PhD
Department of Gastroenterology and Hepatology
Kyoto University Graduate School of Medicine
54 Kawara-cho, Shogoin
Sakyo-ku, Kyoto
Japan   

Publication History

Article published online:
08 October 2021

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Zoom Image
Fig. 1 Image of a threaded inside plastic stent (Through & Pass; Gadelius Medical, Tokyo, Japan).
Zoom Image
Fig. 2 Endoscopic retrograde cholangiography images showing: a the refractory biliary stricture after living donor liver transplantation (white arrowheads); b the inside stent previously placed across the biliary stricture (yellow arrowheads).
Zoom Image
Fig. 3 Duodenoscopy image showing the thread of the inside stent (white arrowheads).
Zoom Image
Fig. 4 Image of the rotatable grasping forceps (FG-44NR-1) that was used to grip the thread, before rotating to roll the thread and pull the stent toward the papilla.