|
1
|
Sakai A, Masuda A, Eguchi T, Furumatsu K, Iemoto T, Yoshida S, Okabe Y, Yamanaka K, Miki I, Kakuyama S, Yagi Y, Shirasaka D, Kohashi S, Kobayashi T, Shiomi H, Kodama Y. A novel fully covered metal stent for unresectable malignant distal biliary obstruction: results of a multicenter prospective study. Clin Endosc 2024; 57:375-383. [PMID: 37430394 PMCID: PMC11133982 DOI: 10.5946/ce.2023.035] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2023] [Revised: 04/17/2023] [Accepted: 04/18/2023] [Indexed: 07/12/2023] Open
Abstract
BACKGROUND/AIMS Endoscopic self-expandable metal stent (SEMS) placement is currently the standard technique for treating unresectable malignant distal biliary obstructions (MDBO). Therefore, covered SEMS with longer stent patency and fewer migrations are required. This study aimed to assess the clinical performance of a novel, fully covered SEMS for unresectable MDBO. METHODS This was a multicenter single-arm prospective study. The primary outcome was a non-obstruction rate at 6 months. The secondary outcomes were overall survival (OS), recurrent biliary obstruction (RBO), time to RBO (TRBO), technical and clinical success, and adverse events. RESULTS A total of 73 patients were enrolled in this study. The non-obstruction rate at 6 months was 61%. The median OS and TRBO were 233 and 216 days, respectively. The technical and clinical success rates were 100% and 97%, respectively. Furthermore, the rate of occurrence of RBO and adverse events was 49% and 21%, respectively. The length of bile duct stenosis (<2.2 cm) was the only significant risk factor for stent migration. CONCLUSIONS The non-obstruction rate of a novel fully covered SEMS for MDBO is comparable to that reported earlier but shorter than expected. Short bile duct stenosis is a significant risk factor for stent migration.
Collapse
Affiliation(s)
- Arata Sakai
- Division of Gastroenterology, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Atsuhiro Masuda
- Division of Gastroenterology, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Takaaki Eguchi
- Department of Gastroenterology and Hepatology, Osaka Saiseikai Nakatsu Hospital, Osaka, Japan
| | - Keisuke Furumatsu
- Department of Gastroenterology, Akashi Medical Center, Akashi, Japan
| | - Takao Iemoto
- Department of Gastroenterology, Kita-Harima Medical Center, Ono, Japan
| | - Shiei Yoshida
- Department of Gastroenterology, Kobe Medical Center, Kobe, Japan
| | - Yoshihiro Okabe
- Department of Gastroenterology, Kakogawa Central City Hospital, Kakogawa, Japan
| | - Kodai Yamanaka
- Division of Gastroenterology, Konan Medical Center, Kobe, Japan
| | - Ikuya Miki
- Department of Gastroenterology, Hyogo Cancer Center, Akashi, Japan
| | - Saori Kakuyama
- Department of Gastroenterology, Takatsuki General Hospital, Takatsuki, Japan
| | - Yosuke Yagi
- Department of Internal Medicine, Shiso Municipal Hospital, Shiso, Japan
| | - Daisuke Shirasaka
- Department of Gastroenterology, Kobe Red Cross Hospital, Kobe, Japan
| | - Shinya Kohashi
- Division of Gastroenterology, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Takashi Kobayashi
- Division of Gastroenterology, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Hideyuki Shiomi
- Division of Gastroenterology, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
- Division of Gastroenterology and Hepatobiliary and Pancreatic Diseases, Department of Internal Medicine, Hyogo Medical University, Nishinomiya, Japan
| | - Yuzo Kodama
- Division of Gastroenterology, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| |
Collapse
|
|
2
|
Silver Nanofunctionalized Stent after Radiofrequency Ablation Suppresses Tissue Hyperplasia and Bacterial Growth. Pharmaceutics 2022; 14:pharmaceutics14020412. [PMID: 35214144 PMCID: PMC8876892 DOI: 10.3390/pharmaceutics14020412] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 02/08/2022] [Accepted: 02/10/2022] [Indexed: 02/01/2023] Open
Abstract
Intraductal radiofrequency (RF) ablation combined with placement of a self-expandable metal stent (SEMS) for malignant biliary obstruction has risks such as stent- and heat-induced biliary sludge and restenosis. Here, we investigated the efficacy of a silver nanoparticles (AgNPs)-coated SEMS to inhibit tissue hyperplasia and bacterial growth caused by RF ablation with stent placement in the rabbit bile duct. The release behavior and antibacterial effects of AgNPs-coated SEMSs were evaluated. Then, SEMSs were successfully placed in all rabbits immediately after RF ablation. Ag ions were rapidly released at the beginning and then showed a gradual release behavior. The AgNPs-coated SEMS significantly inhibited bacterial activity compared to the uncoated SEMS (p < 0.05). Cholangiography and histological examination confirmed that the level of tissue hyperplasia was significantly lower in the AgNPs group than in the control group (all p < 0.05). Immunohistochemistry analyses revealed that TUNEL-, HSP 70-, and α-SMA-positive areas were significantly lower in the AgNPs group than in the control group (all p < 0.05). Intraductal RF ablation combined with nanofunctionalized stent placement represents a promising new approach for suppressing thermal damage as well as stent-induced tissue hyperplasia and bacterial growth.
Collapse
|