Clinical Endoscopy

Endoscopic ultrasound-guided hepaticogastrostomy and endoscopic retrograde cholangiopancreatography-guided biliary drainage for distal malignant biliary obstruction due to pancreatic cancer with asymptomatic duodenal invasion: a retrospective, single-center study in Japan: Naminatsu Takahara, Yousuke Nakai, Kensaku Noguchi, Tatsunori Suzuki, Tatsuya Sato, Ryunosuke Hakuta, Kazunaga Ishigaki, Tomotaka Saito, Tsuyoshi Hamada, Mitsuhiro Fujishiro; Received February 14, 2024 Accepted May 13, 2024 Published online August 23, 2024; DOI: https://doi.org/10.5946/ce.2024.031 [Epub ahead of print]

Graphical Abstract Abstract PDF PubReader ePub: Background
/Aims: Duodenal invasion (DI) is a risk factor for early recurrent biliary obstruction (RBO) in endoscopic retrograde cholangiopancreatography-guided biliary drainage (ERCP-BD). Endoscopic ultrasound-guided hepaticogastrostomy (EUS-HGS) may reduce early RBO in cases of asymptomatic DI, even when ERCP is possible.
Methods
We enrolled 56 patients with pancreatic cancer and asymptomatic DI who underwent EUS-HGS (n=25) or ERCP-BD (n=31). Technical and clinical success, early (<3 months) and overall RBO rates, time to RBO (TRBO), and adverse events (AEs) were compared between the EUS-HGS and ERCP-BD groups. Risk factors for early RBO were also evaluated.
Results
Baseline characteristics were similar between the groups. Both procedures demonstrated 100% technical and clinical success rates, with a similar incidence of AE (48% vs. 39%, p=0.59). While the median TRBO was comparable (5.7 vs. 8.8 months, p=0.60), EUS-HGS was associated with a lower incidence of early RBO compared to ERCP-BD (8% vs. 29%, p=0.09). The major causes of early RBO in ERCP-BD were sludge and food impaction, rarely occurring in EUS-HGS. EUS-HGS was potentially reduced early RBO (odds ratio, 0.32; p=0.07).
Conclusions
EUS-HGS can be a viable option for treating pancreatic cancer with asymptomatic DI.

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Drainage for fluid collections post pancreatic surgery and acute pancreatitis: similar but different?: Yousuke Nakai, Saburo Matsubara, Tsuyoshi Mukai, Tsuyoshi Hamada, Takashi Sasaki, Hirotoshi Ishiwatari, Susumu Hijioka, Hideyuki Shiomi, Mamoru Takenaka, Takuji Iwashita, Atsuhiro Masuda, Tomotaka Saito, Hiroyuki Isayama, Ichiro Yasuda, for the WONDERFUL study group in Japan; Received October 3, 2023 Accepted November 1, 2023 Published online May 17, 2024; DOI: https://doi.org/10.5946/ce.2023.254 [Epub ahead of print]

Abstract PDF PubReader ePub: Postoperative pancreatic fistulas (POPFs) are common adverse events that occur after pancreatic surgery. Endoscopic ultrasonography (EUS)-guided drainage (EUS-D) is a first-line treatment, similar to that for pancreatic fluid collection (PFCs) after acute pancreatitis. However, some POPFs do not develop fluid collections depending on the presence or location of the surgical drain, whereas others develop fluid collections, such as postoperative fluid collections (POPFCs). Although POPFCs are similar to PFCs, the strategy and modality for POPF management need to be modified according to the presence of fluid collections, surgical drains, and surgical type. As discussed for PFCs, the indications, timing, and selection of interventions or stents for EUS-D have not been fully elucidated for POPFs. In this review, we discuss the management of POPFs and POPFCs in comparison with PFCs due to acute pancreatitis and summarize the topics that should be addressed in future studies.

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Evaluation of the mechanical properties of current biliary self-expandable metallic stents: axial and radial force, and axial force zero border: Wataru Yamagata, Toshio Fujisawa, Takashi Sasaki, Rei Ishibashi, Tomotaka Saito, Shuntaro Yoshida, Shizuka No, Kouta Inoue, Yousuke Nakai, Naoki Sasahira, Hiroyuki Isayama; Clin Endosc 2023;56(5):633-649. Published online April 10, 2023; DOI: https://doi.org/10.5946/ce.2022.201

Graphical Abstract Abstract PDF PubReader ePub

Background
/Aims: Mechanical properties (MPs) and axial and radial force (AF and RF) may influence the efficacy and complications of self-expandable metallic stent (SEMS) placement. We measured the MPs of various SEMSs and examined their influence on the SEMS clinical ability.
Methods
We evaluated the MPs of 29 types of 10-mm SEMSs. RF was measured using a conventional measurement device. AF was measured using the conventional and new methods, and the correlation between the methods was evaluated.
Results
A high correlation in AFs was observed, as measured by the new and conventional manual methods. AF and RF scatterplots divided the SEMSs into three subgroups according to structure: hook-and-cross-type (low AF and RF), cross-type (high AF and low RF), and laser-cut-type (intermediate AF and high RF). The hook-and-cross-type had the largest axial force zero border (>20°), followed by the laser-cut and cross types.
Conclusions
MPs were related to stent structure. Hook-and-cross-type SEMSs had a low AF and high axial force zero border and were considered safest because they caused minimal stress on the biliary wall. However, the increase in RF must be overcome.

Citations

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