Analysis of biliary microbiota in experimental pigs before and after enteral extended biliary stents implantation / 中华消化内镜杂志

Objective:To compare the changes of biliary microbiota after enteral extended biliary stents (EEBS) implantation with that of conventional plastic stents in animal experiment, and to preliminarily investigate its possible mechanism in preventing stents occlusion.Methods:A total of 12 healthy Bama minipigs were randomly assigned to the conventional plastic stent group ( n=6) and the EEBS group ( n=6) using simple random method. The bile samples of all pigs were collected before stents implantation and 4 weeks after stents placement. The biliary microbiota composition and diversity before and after different stents implantation were analyzed by 16S rRNA gene sequencing and compared. Results:No complications including acute cholangitis, perforation, bleeding, or death occurred in 12 pigs. Eight days after stents implantation, stents were out of bile duct in all pigs under endoscopy, while the bile samples were collected again for analysis. The main composition of biliary microbiota at the phylum level were Proteobacteria, Firmicutes and Bacteroidota. Alpha-diversities revealed the Shannon ( P=0.004) and Simpson index ( P=0.008) significantly decreased in the conventional stent group after stents placement, and Bata diversity analysis also showed a significant difference in microbial composition (Anosim: R=0.514 8, P=0.011). There was no significant difference in Observed species index ( P=0.095), Chao1 index ( P=0.136), Shannon index ( P=0.353), Simpson index ( P=0.227) or Bata diversity (Anosim: R=0.059 3, P=0.187) in the EEBS group before and after stents placement. LEfSe algorithm indicated Bacteroides_ fragilis and Proteobacteria- Gammaproteobacteria- Enterobacterales- Enterobacteriaceae- scherichia_ Shigella- Escherichia_ coli significantly increased in the conventional stent group, and Desulfobacterota- Desulfovibrionia- Desulfovibrionales- Desulfovibrionaceae- Bilophila significantly increased in the EEBS group after stents placement. Conclusion:The biliary microbiota change slightly after EEBS implantation in the short-term, and EEBS may prevent duodenobiliary reflux by prolonging the reflux path.

Experiencia del manejo por colangiopancreatografía retrógrada endoscópica de las fístulas biliares poscolecistectomía en un hospital de referencia en Colombia / Experience in endoscopic retrograde cholangiopancreatography management of postcholecystectomy biliary leak in a Colombian referral hospital

Resumen Introducción: la fistula biliar poscolecistectomía es poco frecuente. El manejo principalmente es endoscópico, pero en la literatura no hay consenso en la técnica de primera línea entre papilotomía, prótesis biliar o su combinación. Metodología: se realizó un estudio observacional tipo serie de casos en el que se incluyeron todas las CPRE realizadas en el Hospital Universitario San Ignacio en Bogotá, Colombia, entre enero de 2010 y marzo del 2021 por fistula biliar posterior a colecistectomía. Se registraron las características demográficas, manifestaciones clínicas, resolución, eventos adversos y estancia hospitalaria según la técnica endoscópica. Resultados: se incluyeron 24 pacientes con fistula biliar poscolecistectomía que se manejaron con CPRE. La mediana de edad fue de 59 años (rango intercuartílico [RIC]: 53,5-67). En el 75% el tipo de cirugía fue laparoscópica. La manifestación clínica más frecuente fue aumento del drenaje biliar > 150 mL/24 horas (50%), seguido de dolor abdominal (39%). La principal localización fue el conducto cístico en el 40%. El manejo con papilotomía fue del 25%; con prótesis biliar, 8,4%, y combinado, 66%; la resolución de la fístula ocurrió en el 100%, 50% y 87%, respectivamente, con menor estancia hospitalaria en el manejo combinado de 3,5 días frente a 4 días en papilotomía. Solo se presentó 1 evento adverso de hemorragia en el grupo de papilotomía. Conclusión: la papilotomía y la terapia combinada son opciones terapéuticas con buenas tasas de resolución y baja estancia hospitalaria para el manejo de las fistulas biliares poscolecistectomía. Se requerirán estudios prospectivos, aleatorizados y multicéntricos para definir la técnica con mejores desenlaces clínicos.

Abstract Introduction: Postcholecystectomy biliary leak is rare. Management is mainly endoscopic, but in the literature, there is no consensus on the first-line technique between sphincterotomy, biliary stent, or combination. Materials and methods: A case series study was conducted that included all ERCP performed at the San Ignacio University Hospital in Bogotá, Colombia, between January 2010 and March 2021 due to biliary leak after cholecystectomy. Demographic characteristics, clinical manifestations, resolution, adverse events, and hospital length stay were recorded according to the endoscopic technique. Results: 24 patients with postcholecystectomy biliary leak managed with ERCP were included. The median age was 59 years (interquartile range [IQR]: 53.5-67). In 75% the surgery was laparoscopic. The most frequent clinical manifestation was increased biliary drainage > 150 mL/24 hours (50%), followed by abdominal pain (39%). The main fistula's location was the cystic duct in 40%. Management with sphincterotomy was 25%, with a biliary stent, 8.4%, and combined, 66%; leak resolution occurred in 100%, 50%, and 87%, respectively, with a shorter hospital length stay in the combined management of 3.5 days compared to four days in sphincterotomy. Only one adverse bleeding event occurred in the sphincterotomy group. Conclusion: Sphincterotomy and combined therapy are options with reasonable resolution rates and low hospital length stay for managing postcholecystectomy biliary leak. Prospective, randomized, and multicenter trials will be required to define the best technique.

Research Progress of Anti-Reflux Biliary Stent / 医用生物力学

Biliary stent is an effective method for treating malignant biliary obstruction. However, duodenobiliary reflux is commonly found after conventional biliary stent, which causes complications such as biliary retrograde infection and stent blockage, and seriously reduces the quality of patients’ life. At present, anti-reflux biliary stent is considered as a promising palliative treatment method taking drainage and preventing duodenobiliary reflux into account. In this paper, research status of anti-reflux biliary stent was reviewed, and key problems such as design and evaluation of anti-reflux valve, valve and stent connection design, biomechanical analysis of anti-reflux biliary stent were mainly summarized. The current research progress and trend of anti-reflux biliary stent were summarized and analyzed.

Research Progress of Antibacterial Biliary Stent / 中国医疗器械杂志

Biliary stent has been widely used in the treatment of biliary stricture and obstruction, it can relieve the pain of patients effectively, but bacterial infection and stent obstruction are still troublesome after surgery. We introduce the mechanism of infection and stent blockage caused by bacterial invasion after biliary stent implantation, and expound the formation mechanism of bacterial biofilm and bile sludge in this review. Antibacterial biliary stent is an effective way to inhibit biliary tract infection, the literatures on antibacterial modification of biliary stent with different antibacterial methods in domestic and abroad are reviewed, and the research prospect of antibacterial biliary stent is summarized and prospected.

Perforación de sigma secundaria a migración de prótesis biliar / Sigma Perforation Secondary to Migration of Biliary Prosthesis

RESUMEN Introducción: La migración de una prótesis en la vía biliar es una complicación muy poco frecuente que normalmente se expulsa de forma natural, pero en raras ocasiones puede cursar con complicaciones severas. Objetivo: Describir una complicación rara por migración de una prótesis biliar. Caso clínico: Se presenta un paciente de sexo masculino de 75 años, portador de stent biliar que presenta una perforación de sigma secundaria a migración de la prótesis. Conclusiones: Las migraciones protésicas deben vigilarse y si no se eliminan de manera espontánea o el paciente presenta síntomas, se debe proceder a su retirada endoscópica o quirúrgica(AU)

ABSTRACT Introduction: Migration of a prosthesis in the bile duct is a very rare complication normally expelled in a natural way, but on rare occasions it can lead to severe complications. Objective: To describe a rare complication due to migration of biliary prosthesis. Clinical case: A case is presented of a 75-year-old male patient with a biliary stent who presented a sigmoid perforation secondary to migration of the prosthesis. Conclusions: Prosthetic migrations should be monitored and, if they are not eliminated spontaneously or the patient presents with symptoms, they should be removed endoscopically or surgically(AU)

A newly designed biliary brachytherapy drainage catheter for patients with malignant biliary obstruction: A pilot study

Aim: Self.expandable metallic stent (SEMS) placement has been considered as the preferred treatment to relieve jaundice in nonsurgical patients. However, 50% of stents become stenosed within 3.6 months due to tumor ingrowth and epithelial hyperplasia. This study aims to evaluate the feasibility and efficacy of a newly designed brachytherapy biliary drainage catheter (BBDC) loaded with 125I seeds for palliation of malignant biliary obstruction (MBO). Methods: In this prospective study, patients with unresectable MBO underwent BBDC placement after SEMS placement at our center from September 2017 to April 2019. Results: A total of 21 patients with MBO were enrolled. The technical and clinical success rates were 100%. Total bilirubin, direct bilirubin, alanine aminotransferase, alkaline phosphatase, cancer antigen 19.9, and carcinoembryonic antigen levels significantly decreased during the 1.month follow.up (P < 0.05). Four patients (19%) had minor complications. During the median follow.up of 299 days, 13 patients (61.9%) developed stent occlusion. The 6.month stent patency and survival rates were 73.5% and 79.2%, respectively. The median stent patency and survival were 279 and 454 days, respectively. Conclusion: The use of BBDC loaded with 125I seeds is a feasible and effective method to prolong biliary stent patency in patients with MBO

Combining irreversible electroporation with a biliary composite stent implantation in treatment of unresectable hilar cholangiocarcinoma / 中华肝胆外科杂志

Objective To evaluate the clinical value of combining irreversible electroporation (IRE) with a biliary composite stent implantation in the treatment of unresectable hilar cholangiocarcinoma.Methods A total of sixteen patients with unresectable hilar cholangiocarcinoma were treated in the Fifth Affiliated Hospital of Zhengzhou University,from April 2016 to July 2018 with combined IRE ablation with a 125I particle biliary composite stent implantation.A comparative analysis was conducted on the clinical data including total bilirubin,ALT,AST,myocardial enzymes before and after surgery.Results All patients underwent successful operation and the hemodynamics were stable during the operations.In 16 patients,the myocardial enzymes increased on the first day after surgery and fell to normal within 5 days.A total of thirteen patients had a progressive reduction of CA19-9,1 patient had no significant change in CA19-9,and 2 patients had CA19-9 in the normal range before and after treatment.Total bilirubin,AST,and ALT decreased gradually after surgery in all the patients.Postoperative complications included biliary bleeding (1 patient),and ascites (1 patient).All patients were able to have the PTCD tube removed after treatment.The median time to PTCD removal was 46 days (range 11 ～ 123 days),and the median catheter-free time before requiring another PTCD tube replacement was 184 days (range 43 ～365 days).Conclusions IRE ablation combined with a biliary composite stent in the treatment of unresectable hilar cholangiocarcinoma was safe.The treatment had good short-term outcomes and it significantly improved the quality of life of the patients.

Efficacy of Nasobiliary Tubes and Biliary Stents in Management of Patients with Bile Leak after Liver Transplantation: A Systematic Review

BACKGROUND/AIMS: Bile leak is one of the most common complications of liver transplantation. The treatment options for bile leaks include conservative management, surgical re-intervention, percutaneous drainage and endoscopic drainage. We aimed to perform a systematic review to identify the efficacy of endoscopic treatment in the resolution of post-transplant bile leaks. METHODS: Two independent reviewers performed systematic literature search in PubMed, ISI Web of Science, grey literature and relevant references in May 2017. Human studies in English with documented post-liver transplant bile leaks were included. RESULTS: Thirty-four studies were included in the final analysis. The pooled efficacy of biliary stents for the resolution of post-transplant bile leaks was 82.43% compared with 87.15% efficacy of nasobiliary tubes. The efficacy of biliary stents was lower for anastomotic leaks (69.23%) compared to T-tube (90.9%) or cut-surface/ cystic duct stump related leaks (92.8%). Similarly, the efficacy of nasobiliary tube was also lower for anastomotic leaks (58.33%) compared to T-tube or cut-surface related leaks (100%). CONCLUSIONS: In this systematic review, the overall efficacy was 82.43% in biliary stent group, and 87.15% in nasobiliary tube group. Both biliary stent and nasobiliary tube were more effective in managing non-anastomotic leaks compared to anastomotic leaks.

Un nuevo prototipo de stent biliar cubierto (flower stent) frente al stent biliar convencional en la prevención de pancreatitis y colecistitis poststent / Comparison of Flower Petal Stenting, a new prototype of covered biliary stent, with conventional biliary stenting for prevention of pancreatitis and post-stent cholecystitis

Resumen Antecedentes y objetivos: la pancreatitis y la colecistitis son complicaciones mayores después de la postura de un stent metálico cubierto en el manejo de la obstrucción biliar distal maligna. Se pretende comparar el uso de un stent biliar cubierto convencional con un nuevo prototipo de stent biliar cubierto de morfología en flor con baja fuerza axial (FA) y fuerza radial (FR), y evaluar el impacto de las cifras de colecistitis y pancreatitis poststent. Métodos: se realizó un estudio prospectivo no aleatorizado en el que se comparó un grupo de 18 pacientes con stent biliar tipo flor (SF) con un grupo de pacientes que recibieron un stent biliar convencional (SC) con una relación 1:2, para el manejo de la obstrucción biliar distal maligna. Se evaluaron datos demográficos; el éxito técnico y clínico; así como la aparición de colecistitis y/o pancreatitis, tasas de migración y/u oclusión. Resultados: se evaluaron 18 pacientes en el grupo con SF (7 hombres, 39 %) con una edad mediana de 72 años y 36 pacientes (16 hombres, 44 %) en el grupo de SC con una edad mediana de 71 años. Se presentaron 3 casos de colecistitis y 4 casos de pancreatitis, todos ellos en el grupo de SC. Al explorar la asociación de los aspectos clínicos con respecto al tipo de stent, el análisis multivariado mostró diferencias estadísticamente significativas en 4 aspectos: la hemoglobina, la longitud de estenosis, la etiología y la oclusión del stent. Al evaluar los tiempos de supervivencia entre los pacientes con SC y SF, no se hallaron diferencias significativas en las funciones de supervivencia (log rank, p = 0,399). En el modelo de riesgos proporcionales de Cox, solo un aspecto mostró diferencias significativas frente a los tiempos de supervivencia: la presencia de metástasis. Conclusiones: el uso de un nuevo prototipo de stent SF (con surcos laterales) con menor FA y FR se relaciona con un menor índice de complicaciones como colecistitis y pancreatitis en comparación con el SC, en la paliación de las estenosis biliares malignas distales sin detrimento de su permeabilidad o migración y sin afectar la supervivencia de estos pacientes.

Abstract Background and objectives: Pancreatitis and cholecystitis are major complications following stenting with covered metallic stents to manage malignant distal biliary obstructions. We compare the use of a conventional covered biliary stent with a new prototype of a covered biliary stent with a flower-pedal structure that uses with low axial force and radial force in order to evaluate impacts on cholecystitis and pancreatitis after stenting. Methods: This is a non-randomized prospective comparison of a group of 18 patients stented with a flower-like biliary stent (FS group) with a group of 36 patients who received conventional biliary stents (CS group) ratio for management of malignant distal biliary obstructions. Demographic data and data about technical and clinical success including the appearance of cholecystitis and/or pancreatitis, migration rates and/or occlusion were evaluated. Results: The 18 FS group patients included 7 men (39%) and had a median age of 72 years. The 36 CS group patients included 16 men (44%) and had a median age of 71 years. There were three cases of cholecystitis and four cases of pancreatitis, all of which were in the CS group. Multivariate analysis showed statistically significant differences between the two groups in four clinical areas: hemoglobin, length of stenosis, etiology and occlusion of stents. No significant differences were found in survival time functions (Log Rank, p = 0.399). In Cox's proportional hazards model, the only significant difference with respect to survival times was found on the issue of whether or not metastasis was present. Conclusions: The use of the new prototype flower-like biliary stent with lateral grooves and lower axial force and radial force is related to a lower rate of complications such as cholecystitis and pancreatitis than the use of conventional stents for palliation of distal malignant biliary stenoses. The new stent has no detriments in terms of permeability or migration and did not affect the survival of these patients.

Manejo endoscópico de la estenosis biliar postoperatoria a propósito de un caso / Endoscopic management of postoperative bile duct stricture report of a case

Las estenosis biliares postoperatorias principalmente las post colecistectomía representan la causa más frecuente de estenosis biliares benignas. Presentamos el caso de una paciente del sexo femenino que acude por presentar ictericia, coluria, alzas térmicas y dolor abdominal con el único antecedente de una colecistectomía laparoscópica. Los exámenes de laboratorio presentan un patrón obstructivo colestásico se procede a realizar colangiopancreatografía retrógrada endoscópica (ERCP), observando estenosis de la vía biliar en relación a los clips metálicos. Se realizó dilataciones mecánicas e hidrostáticas de vía biliar además de la colocación, secuencial de dos prótesis biliares de plástico. A los 6 meses se retira las prótesis biliares no evidenciando estenosis en la colangiografía de control. El manejo de las estenosis benignas representa un reto ya sea para el endoscopista, como para el cirujano, la colangiopancreatografía retrógrada endoscópica juega un papel muy importante diagnóstico y terapéutico principalmente con la colocación de prótesis biliares.

Postoperative biliary strictures, mainly post cholecystectomy, represent the most frequent cause of benign biliary stenosis. We present a case of a female patient who presents jaundice, choluria, thermal spikes and abdominal pain with the only history of laparoscopic cholecystectomy. Laboratories with a cholestasic obstructive pattern proceeds to perform endoscopic retrograde cholangiopancreatography (ERCP), observing stenosis of the bile duct in relation to metal clips. Mechanical and hydrostatic dilatations of the bile duct were performed in addition to the sequential placement of two plastic biliary stents. 6 months later biliary stents were removed, not showing stricture area in the control cholangiography. The management of benign strictures represent a challenge for both the endoscopist and the surgeon the endoscopic retrograde cholangiopancreatography plays a very important diagnostic and therapeutic role mainly with the placement of biliary stent.

Percutaneous Metallic Stent Placement for Palliative Management of Malignant Biliary Hilar Obstruction

OBJECTIVE: To investigate the outcomes of percutaneous metallic stent placements in patients with malignant biliary hilar obstruction (MBHO). MATERIALS AND METHODS: From January 2007 to December 2014, 415 patients (mean age, 65 years; 261 men [62.8%]) with MBHO were retrospectively studied. All the patients underwent unilateral or bilateral stenting in a T, Y, or crisscross configuration utilizing covered or uncovered stents. The clinical outcomes evaluated were technical and clinical success, complications, overall survival rates, and stent occlusion-free survival. RESULTS: A total of 784 stents were successfully placed in 415 patients. Fifty-five patients had complications. These complications included hemobilia (n = 19), cholangitis (n = 13), cholecystitis (n = 11), bilomas (n = 10), peritonitis (n = 1), and hepatic vein-biliary fistula (n = 1). Clinical success was achieved in 370 patients (89.1%). Ninety-seven patients were lost to follow-up. Stent dysfunction due to tumor ingrowth (n = 107), sludge incrustation (n = 44), and other causes (n = 3) occurred in 154 of 318 patients. The median overall survival and the stent occlusion-free survival were 212 days (95% confidence interval [CI], 186−237 days) and 141 days (95% CI, 126−156 days), respectively. The stent type and its configuration did not affect technical success, complications, successful internal drainage, overall survival, or stent occlusion-free survival. CONCLUSION: Percutaneous stent placement may be safe and effective for internal drainage in patients with MBHO. Furthermore, stent type and configuration may not significantly affect clinical outcomes.

Percutaneous Puncture to Treat Malignant Obstructive Jaundice in Patients Who Fail Endoscopic Drainage / 中国医科大学学报

Objective To study the efficacy of percutaneous transhepatic cholangiodrainage (PTCD),percutaneous gallbladder drainage,and percutaneous transhepatic biliary stent implantation for the treatment of malignant obstructive jaundice in patients who are observed to fail endoscopic drainage. Methods We retrospectively analyzed 17 patients diagnosed with obstructive jaundice between August 2015 and July 2017 who were observed to have failed endoscopic drainage. Percutaneous puncture drainage had been performed in all patients-different methods were chosen based on the type of lesion and the patient's intraoperative condition. Among these patients, 9 underwent percutaneous transhepatic biliary stent implantation (53％),5 underwent PTCD (29％),and 3 underwent percutaneous gallbladder drainage (18％). The serum levels of total bilirubin (TBIL) and alanine aminotransferase (ALT) were assessed a day preoperatively and a week postoperatively. The postoperative decrease (or drop) in the serum TBIL and ALT levels was used as a parameter to assess the efficacy of treatment. Patients were divided into a stent and a tube group. The therapeutic effects were compared between the groups in terms of the drop in the serum TBIL and ALT levels and the survival time of patients. Results The postoperative serum TBIL and ALT levels were significantly decreased in all patients (P < 0. 05). No statistically significant difference was observed between the stent and the tube group in terms of the decrease in serum TBIL and ALT levels (P > 0. 05). However,a statistically significant difference was observed between the stent and the tube group in terms of the survival time of patients (P < 0. 05). Conclusion Percutaneous puncture is an effective treatment modality to manage malignant obstructive jaundice in patients who fail endoscopic drainage. Compared to tube drainage,stent placement can prolong patient survival time. Regarding the decrease in serum TBIL and ALT levels,we conclude that stent implantation is not significantly better than tube drainage.

Controversy and strategy of preoperative biliary drainage reducing jaundice in hilar cholangiocarcinoma / 中华消化外科杂志

The radical resection is the only curative way for hilar cholangiocarcinoma,and combined hepatectomy is usually needed to achieve the goal of radical resection.Most patients with hilar cholangiocarcinoma are accompanied by obstructive jaundice.Although preoperative biliary drainage (PBD) can improve liver function,blood coagulation function,nutritional status and immunologic function,control acute cholangitis and promote liver regeneration,but a series of its drawbacks currently lead to a big controversy about application value of radical resection of hilar cholangiocarcinoma.Through reviewing literatures and combining with clinical practice experiences,author suggested some ideas on effects,disadvantages,application value,indication and method selection of PBD that will provide a reference in clinical practices.

Perforación duodenal post-CPRE de manejo no quirúrgico: reporte de un caso / A Case Report of Non-Surgical Duodenal Perforation Following ERCP

Resumen La perforación duodenal posterior a la colangiopancreatografía retrógrada endoscópica (CPRE) es una complicación infrecuente que sucede en un 0,1%-0,6% de los casos. El manejo (quirúrgico o no quirúrgico) depende de varios factores. Presentamos el caso de una mujer que sufrió una perforación duodenal post-CPRE manejada conservadoramente con un stent biliar metálico autoexpandible (SMAE) totalmente recubierto y antibióticos, quien no requirió manejo quirúrgico.

Abstract Post-ERCP duodenal perforations occur in only 0.1 to 0.6% of ERCP cases. Whether these occurrences are managed with or without surgery depends on several factors. We report the case of a woman who had a post-ERCP duodenal perforation that was conservatively managed with a fully covered self-expanding metal stent (FCSEMS) and antibiotics who did not require surgical management.

Postoperative stent restenosis of percutaneous biliary metal stent implantation for malignant obstructive jaundice: recent progress in clinical research / 介入放射学杂志

Malignant obstructive jaundice is caused by biliary obstruction due to malignant tumor,and in clinical practice percutaneous transhepatic biliary metal stent implantation has already become one of the main measures to relieve malignant obstructive jaundice.Nevertheless,postoperative complications severely affect the life quality and survival of patients,especially the stent restenosis seriously influences the patient's prognosis,therefore,after percutaneous transhepatic biliary metal stent implantation the use of active preventive measures and the correct treatment of stent restenosis are particularly important.The causes of stent restenosis include tumor growth,cholestasis and proliferation of granulation tissue,and the main measures to prevent stent restenosis at present are re-implantation of the stent,reformation of the stent structure and combination therapy.This article aims to make a comprehensive reviewabout the causes of postoperative stent restenosis and the effective preventive measures.

Percutaneous transhepatic biliary preset implantation of after-loading radiotherapy catheter for the treatment of bile duct carcinoma of ampulla: preliminary results of 10 cases / 介入放射学杂志

Objective To discuss the safety and feasibility of percutaneous transhepatic biliary preset implantation of after-loading radiotherapy catheter in treating bile duct carcinoma of ampulla.Methods A total of 10 patients with carcinoma of ampulla were collected.After percutaneous transhepatic biliary stent implantation was accomplished,the after-loading radiotherapy catheter was inserted via the guide wire.Based on the lesion's location,the positioning of both the catheter tip and the simulation radioactive source implanted through catheter was conducted.Each time before irradiation,the positions of the catheter and the radioactive source were reset under CT or fluoroscopic guidance in order to ensure that the lesion could get adequate internal irradiation dose.Results Percutaneous transhepatic biliary implantation of after-loading radiotherapy catheter and the positioning of simulation radioactive source were successfully accomplished in all 10 patients,and the total internal irradiation dose was completed within 5-7 days after catheter implantation.No severe complications occurred during the whole therapeutic process.Conclusion The technology of percutaneous transhepatic biliary preset implantation of after-loading radiotherapy catheter is safe and feasible,it carries high success rate with less complications.This therapy can improve the patency rate of biliary stent,and,as a palliative treatment,it is suitable for patients with carcinoma of ampulla.This treatment is worthy of application and promotion.

A new biodegradable stent made of magnesium alloyin preventing stenosis in the common bile duct probe / 西安交通大学学报(医学版)

Objective To design a new type of biliary stent to be used in the common bile duct probe and evaluate its biocompatibility, safety and effectiveness in a canine model.Methods Magnesium alloy (AZ 31B) was used to make biliary stents.A canine model of acute obstructive jaundice was established by ligating the distal end of the common bile duct.These dogs were divided into two groups with either placement of magnesium stent or not.The incidence of bile duct leakage and survival were evaluated.Meanwhile, we determined the concentration of magnesium in various body fluids and organs, liver function test, and ultrasonic and histological studies.Results The concentrations of magnesium in the blood, feces, liver, heart, brain and lungs were similar between the two groups.Bile leakage rate in experimental group and control group was 0％ and 16.7％, respectively.The mortality was 16.7％ and 33.3％.There were no significant differences in ALP and TBIL between experimental group and control group (P>0.05) before building and bile duct exploration.There were significant differences in ALP andTBIL between the two groups one and three months after bile duct probe (P<0.05).Biliary tract specimens showed obviously anastomotic stenosis performances and expansion performances of extrahepatic biliary in the control group, but in experimental group such changes were not observed.Ultrasonography showed that the patency of biliary anastomosis was good and there was no anastomotic biliary stricture in experimental group.However, progressive stenosis and expansion performances of extrahepatic biliary occurred in control group.There were fewer collagen fibers but more muscle fibers in experimental group than in control group.Conclusion Biliary stent made of magnesium alloy is of good biocompatibility and has the potential to prevent the postoperative stenosis in the common bile duct probe.

The impact of the location of biliary stent on treatment of lower malignant biliary obstruction / 实用放射学杂志

Objective To compare the difference in clinical prognosis of patients with low malignant obstructive jaundice treated by percutaneous biliary stent insertion across or above the duodenal papilla.Methods 56 patients with malignant biliary obstruction were reviewed retrospectively.Stents were placed above the duodenal papilla in 31 cases (group A) and across the duodenal papilla in 25 cases (group B).Total bilirubin reduction rate after 4-7 days of the procedure, biliary infection rate and stent occlusion rate were evaluated and compared between two groups.Results Mean survival periods were 180.3±142.5 days for group A and 178.6±137.7 days for group B (P=0.840).Total bilirubin level was decreased by 42.0±43.6% for group A and by 41.4±28.7% for group B after 4-7 days of the procedure(P=0.950);clinical success rates were 93.5% for group A and 92.0% for group B (P=1.0).Post-procedure cholangitis occurred in 7 cases (22.6%) in group A and 5 cases (20.0%) in group B (P=0.815).Stent occlusion rates were 22.6% and 28.0% for group A and group B (P=0.642).Conclusion For patients with lower malignant biliary obstruction, both of the two modalities of stent placement are safe and effective treatment.Stent placement across the duodenal papilla do not increase the development of stent occlusion or cholangitis compared with stent placement above the duodenal papilla.

Clinical efficacy and impact on liver and immune function in ERCP stent implantation for elderly patients with malignant obstructive jaundice / 中国内镜杂志

Objective To probe into the clinical application value of ERCP stent implantation in treatment of elderly patients with malignant obstructive jaundice. Methods From January 2014 to December 2015, 97 elderly patients with malignant obstructive jaundice were selected in our hospital as study objects. According to the different treatment, the patients were divided into study group (n = 50) and control group (n = 47) randomly. The patients in study group were treated with ERCP biliary stent implantation. The patients in control group were treated with PTCD biliary stent implantation. The surgical treatment, clinical symptoms, liver function, immunologic function and incidence of complication of the patients between the two groups were compared and analyzed. Results Compared with control group, the patients in study group, the rate of successful operation was 96.00% (48/50), there was increased, but the differences were not significant statistically (P > 0.05); the patients in study group, total efficiency rate was 94.00% (47/50), there were increased significantly, the differences were significant statistically (P < 0.05); the patients in study group after 2 weeks treatment, TBIL were (110.24±60.05) μmol/L, DBIL were (82.43 ± 46.19) μmol/L, ALT were (86.79 ± 39.30) IU/L, AST were (53.65 ± 35.81) IU/L, ALP were (216.83 ± 127.74) IU/L, GGT were (196.52 ± 100.64) IU/L, there were improved significantly, the differences were significant statistically (P < 0.05);the patients in study group after treatment, the levels of CD3+ was (70.24 ± 5.62)%, CD4+ was (37.74 ± 3.85)%, CD4+/CD8+ was (1.35 ± 0.12) and CD8+ was (27.96 ± 3.14)%, there was reduced significantly, the differences were significant statistically (P < 0.05); the patients in study group, the incidence of total complication was 8.00% (4/50), there was decreased significantly, the differences were significant statistically (P < 0.05). Conclusion ERCP stent implantation has very important clinical significance in improving the treatment effect, liver function and immune function for elderly patients with malignant obstructive jaundice.

Therapeutic effects of different treatments of hilar cholangiocarcinoma / 中华肝胆外科杂志

Objective To analyze the clinical data of patients with hilar cholangiocarcinoma (HCCA),and to compare the therapeutic effects of different methods on treating these patients.Methods The clinical data of 101 patients with HCCA in China-Japan Union Hospital of Jilin University were analyzed.Results The overall 1-year and 2-year survival rates in the radical operation group were 95.5％ and 40.9％,respectively.There was a significant difference between the radical operation group and the palliative resection group (P ＜ 0.05).The overall 1-year and 2-year survival rates in the palliative resection group were 75.0％ and 16.7％,respectively,which were much better than those in patients treated with PTCD,biliary stent on open abdominal biliary drainage (P ＜ 0.05).There were no significant differences among the PTCD,biliary stent and open abdominal biliary drainage groups (P ＞ 0.05).Conclusions Radical HCCA resection is still the best and the first choice treatment for patients with HCCA.The therapeutic effects of radical operation were much better than those of palliative resection,biliary stent,PTCD and open abdominal biliary drainage.