• Korean Journal of Radiology
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• 제24권12호
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• pp.1241-1248
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• 2023

Objective: To evaluate the role of percutaneous pancreatic stent placement in postoperative pancreaticojejunostomy stenosis (PJS). Materials and Methods: This retrospective single-center study included seven procedures in five patients (four males and one female; median age, 63 years) who underwent percutaneous pancreatic stent placement for postoperative PJS between January 2005 and December 2021. The patients were referred to interventional radiology because of unfavorable anatomy or bowel abnormalities. The pancreatic duct was accessed under ultrasound and/or computed tomography guidance. A stent was placed after balloon dilatation of the PJS. Moreover, plastic stents were placed for the first two procedures, whereas bare-metal stents were used for the remaining five procedures. Technical success was defined as the successful placement of stents for the PJS, meanwhile, clinical success was defined as the normalization of pancreatic enzymes without recurrence of pancreatitis. Results: Pancreatic duct access and stent placement were successfully performed in all patients (technical success rate: 100%). All the procedures initially yielded clinical success. However, recurrence of pancreatitis was observed after two procedures that used plastic stents because of stent migration at 0.3 and 3 months after the procedure. In contrast, no instances of recurrent pancreatitis were noted after metal stent placement for a follow-up duration of 1-36 months. No serious procedure-related adverse events were observed. Conclusion: Percutaneous pancreatic stent placement may be a viable option for patients with postoperative PJS in whom an endoscopic approach is not feasible. Metal stents may be considered over plastic stents for the management of PJS, considering the possible lower stent migration and infeasibility of frequent endoscopic stent exchange due to the altered anatomy.

• Archives of Plastic Surgery
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• 제35권1호
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• pp.73-77
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• 2008

Purpose: In case of facial injury, a canalicular injury is common. Many methods and materials have been used for reconstruction of lacrimal canaliculi. Silicone tube is the most widely used material, generally with pigtail probe or stainless steel probe. But it has still many problems. The authors guess that reconstruction using Mini $Monoka^{(R)}$ will reduce those problems and will be more successful. Methods: From July, 2003 to November, 2006 in 24 patients with canalicular injury, 11 cases were recon- structed with former silicone tube and 13 cases were treated with Mini $Monoka^{(R)}$. Results: The mean follow-up period was 3 months. The results of reconstruction were classified into three groups(Normal, Fair, Poor). In 13 cases with Mini $Monoka^{(R)}$ stent, 10 cases were normal, 3 were fair, and no poor cases. But in 11 cases with bicanaliculus silicone stent, 6 cases were normal, 3 were fair, and 2 were poor. Conclusion: Compared with bicanaliculus silicone stent, Mini $Monoka^{(R)}$ stent is fixed well, has no aesthetic problems, makes less foreign body sensation. And the results were successful.

• Archives of Reconstructive Microsurgery
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• 제20권1호
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• pp.32-37
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• 2011

Purpose: Canalicular laceration is relatively common due to its exposed, vulnerable location in case of facial trauma. Conjunctivodacryocystorhinostomy has been the standard treatment for canalicular obstruction secondary to unrepaired canalicular laceration. In spite of a high rate of relieving tear-duct obstruction, this method is noted to be associated with low rate of patient satisfaction and a number of complications. The goal of this study is to report the good results of delayed lacrimal stent implantation with Mini Monoka$^{(R)}$ for patients whose canaliculi were not repaired by initial surgery. Methods: From May of 2005 to February of 2007, four patients who underwent delayed lacrimal stent implantation using Mini Monoka$^{(R)}$ in canalicular laceration were retrospectively reviewed. First, the previous scar incision was made over the lower lid and we identified the cut end of proximal lacerated canaliculus. The Mini Monoka$^{(R)}$ was passed through the punctum to the cut end of the proximal lacerated canaliculus. We identified the cut end of the distal lacerated canaliculus, whose cut end has rolled white edges after careful excision of the scarred lid tissue. We then passed Mini Monoka$^{(R)}$ through the lacerated inferior canaliculus. Using an operating microscope, we placed three interrupted sutures of 8-0 Ethilon to join the canalicular ends. Silicone stent was left in place for 6 months. The mean age of the patients was 48.5 years (range, 35 to 59 years). The time interval from initial trauma to delayed lacrimal stent implantation was between 3 and 31 days. Follow-up periods ranged from 12 and 20 months. Results: The results of reconstruction were classified into normal, fair and poor. Patent lacrimal drainage systems were achieved in three of the four cases. In one case, epiphora was encountered. No cases of stent displacement, conjunctivitis or granuloma formation were encountered. Conclusion: Even though canalicular reconstruction was delayed for a long time, attempting canalicular reconstruction would be acceptable before considering secondary operations like dacryocystorhinostomy and conjunctivodacryocystorhinostomy.

• Clinical Endoscopy
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• 제55권4호
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• pp.564-569
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• 2022

A lumen-apposing metal stent (LAMS) is a saddle-shaped stent with large flanges at both ends, thereby preventing stent migration and helping with approximation of the adjacent structures. We report the case of a 25-year-old female with remnant choledochal cyst which was successfully treated with LAMS after initial treatment failure with a plastic stent. Although complete excision of the cyst is the definite treatment of choledochal cysts, endoscopic ultrasonography-guided cystoduodenostomy can be considered in cases wherein surgery is not feasible and dysplasia is not present. LAMS may be preferred to plastic stents for effective resolution of remnant choledochal cyst and prevention of ascending infection.

• The Korean Journal of Pancreas and Biliary Tract
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• 제22권4호
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• pp.165-171
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• 2017

배경/목적: 담도암에서 플라스틱 스텐트 너비에 따른 스텐트 생존 차이에 대한 데이터는 부족하다. 이번 연구의 목적은 담도암에서 7-프렌치와 10-프렌치 플라스틱 스텐트의 생존 차이를 보고 어떤 인자가 개방성에 영향을 미치는지 확인하고자 한다. 방법: 2010년 1월부터 2014년 10월까지 연세대학교 원주세브란스기독병원에서 담도암으로 담도가 막힌 환자들을 등록하였다. 결과: 총 215명(7-프렌치:10-프렌치 = 89명:126명)의 환자를 후향적으로 등록하였다. 암의 위치는 총담관(111명), 간문부 담관(45명), 바터팽대부(59명)였다. 스텐트 이동이나 폐쇄는 두 군 간에 통계적 차이가 없었다. 중앙 스텐트 생존은 7-프렌치의 경우 3.3개월이었고 10-프렌치의 경우 5.9개월이었다(p = 0.543). 플라스틱 스텐트 너비는 스텐트 생존에 영향을 미치지 않았다(Hazard Ratio: 1.11, 95% CI 0.71-1.73, p = 0.649). 결론: 담도암 치료에 있어 7-프렌치와 10-프렌치 플라스틱 스텐트는 스텐트 이동이나 폐쇄 차이가 없었고 스텐트 생존에 있어 7-프렌치 플라스틱 스텐트가 10-프렌치에 비해 열등하지 않았다.

• 대한영상의학회지
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• 제84권2호
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• pp.512-517
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• 2023

췌공장문합술 후 췌관 내 스텐트를 삽입하는 것은 수술 후에 췌장루나 췌관 협착의 발생을 예방하기 위해 널리 시행하는 술기이다. 그러나 삽입한 스텐트가 막히거나 이동하는 등 스텐트에 의해서도 다양한 합병증이 발생할 수 있다. 저자들은 췌관에 삽입한 플라스틱 스텐트가 이동하면서 발생된 매우 드문 합병증의 예를 보고하고자 한다. 유문부 보존 췌두부십이지장 절제술 시행 후 췌장 내 삽입한 스텐트는 공장으로 이동하여 스텐트-돌 복합체의 근원으로 작용하여 공장 폐색을 일으켰다. 스텐트-돌 복합체는 탐색적 개복술로 제거되었다.

• Asian Pacific Journal of Cancer Prevention
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• 제14권1호
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• pp.529-532
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• 2013

Cholangiocarcinoma, though very rare in Western countries, is one of the commonest liver malignancies in Southeast Asia, especially in Thailand. More than half of the patients present with advanced stage disease. Given the poor treatment outcomes of adjuvant therapeutic options, many patients undergo only biliary drainage for palliative treatment. Clinical characteristics and treatment outcomes after biliary stenting were here analyzed for a total of 224 uresectable cholangiocarcinoma cases, 58.9% in men. The mean age was 61.5 years. Hilar involvement was the most common location. The patients underwent biliary drainage using plastic and metallic stents equally, early stent occlusion being encountered in 21.4% and 10.7%, respectively. The median survival time was 4.93 months for patients who received plastic and 5.87 months for patients who received metallic stents.

• Clinical Endoscopy
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• 제55권1호
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• pp.141-145
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• 2022

A 44-year-old woman underwent sleeve gastrectomy, which was complicated by a leak. She was treated with two sessions of endoscopic internal drainage using plastic double-pigtail stents. Her clinical evolution was favorable, but four months after the initial stent placement, she became symptomatic, and a gastrobronchial fistula with the proximal end of the stents invading the diaphragm was diagnosed. She was treated with antibiotics, plastic stents were removed, and a partially covered metallic esophageal stent was placed. Eleven weeks later, the esophageal stent was removed with no evidence of fistula. Inappropriate stent size, position, stenting duration, and persistence of low-grade inflammation could explain the patient's symptoms and provide a mechanism for gradual muscle rupture and fistula formation. Although endoscopic internal drainage is usually safe and effective for the management of post-laparoscopic sleeve gastrectomy leaks, close clinical and radiological follow-up is mandatory.

• Clinical Endoscopy
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• 제57권5호
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• pp.595-603
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• 2024

Background/Aims: Coaxial placement of double pigtail plastic stents (DPPS) through lumen-apposing metal stents (LAMSs) is commonly performed to reduce the risk of LAMS obstruction, bleeding, and stent migration when used for the drainage of pancreatic fluid collections (PFCs). A systematic review and meta-analysis were performed to compare the outcomes of LAMS alone and LAMS with coaxial DPPS placement in the management of PFCs. Methods: A systematic review was conducted to identify studies comparing LAMS and LAMS/DPPS for PFC drainage. Primary outcomes included the rate of clinical success, overall adverse events (AEs), bleeding, infection, occlusion, and stent migration. The pooled effect size was summarized using a random-effects model and compared between LAMS and LAMS/DPPS by calculating odds ratios (ORs). Results: Nine studies involving 709 patients were identified (338 on LAMS and 371 on LAMS/DPPS). LAMS/DPPS was associated with a reduced risk of stent obstruction (OR, 0.59; p=0.004) and infection (OR, 0.55; p=0.001). No significant differences were observed in clinical success (OR, 0.96; p=0.440), overall AEs (OR, 0.57; p=0.060), bleeding (OR, 0.61; p=0.120), or stent migration (OR, 1.03; p=0.480). Conclusions: Coaxial DPPS for LAMS drainage of PFCs is associated with a reduced risk of stent occlusion and infection; however, no difference was observed in the overall AE rates or bleeding.

• Imaging Science in Dentistry
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• 제40권4호
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• pp.171-178
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• 2010

Purpose : The purpose of this study is to develop a surgical stent for dental implant procedure that can be easily applied and affordable by using cone beam computerized tomography (CBCT). Materials and Methods : Aluminum, Teflon-PFA (perfluoroalkoxy), and acetal (polyoxymethylene plastic) were selected as materials for the surgical stent. Among these three materials, the appropriate material was chosen using the CBCT images. The surgical stent, which could be easily placed into an oral cavity, was designed with chosen material. CBCT images of the new surgical stent on mandible were obtained using Alphard-3030 dental CT system (Asahi Roentgen Co., Ltd., Kyoto, Japan). The point of insertion was prescribed on the surgical stent with the multiplanar reconstruction software of OnDemand3D (CyberMed Inc., Seoul, Korea). Guide holes were made at the point of insertion on the surgical stent using newly designed guide jig. CBCT scans was taken for the second time to verify the accuracy of the newly designed surgical stent. Results : Teflon-PFA showed radiologically excellent image characteristics for the surgical stent. High accuracy and reproducibility of implantation were confirmed with the surgical stent. Conclusion : The newly designed surgical stent can lead to the accurate implantation and achieve the clinically predictable result.