scholarly journals Bile Flow Phantom Model and Animal Bile Duct Dilation Model for Evaluating Biliary Plastic Stents with Advanced Hydrophilic Coating

Gut and Liver ◽  
2016 ◽  
Vol 10 (4) ◽  
pp. 632-641 ◽  
Author(s):  
Chang-Il Kwon ◽  
Gwangil Kim ◽  
Seok Jeong ◽  
Won Seop Lee ◽  
Don Haeng Lee ◽  
...  
Keyword(s):  
Bile Duct ◽  
Bile Flow ◽  
Plastic Stents ◽  
Phantom Model ◽  
Hydrophilic Coating ◽  
Flow Phantom ◽  
Animal Bile

The Stent Patency and Migration Rate of Different Shaped Plastic Stents in Bile Flow Phantom Model and In Vivo Animal Bile Duct Dilation Model

2017 ◽  
Vol 62 (5) ◽  
pp. 1246-1255 ◽  
Author(s):  
Chang-Il Kwon ◽  
Gwangil Kim ◽  
Seok Jeong ◽  
Don Haeng Lee ◽  
Kyoung Ah Kim ◽  
...  
Keyword(s):  
Bile Duct ◽  
Bile Flow ◽  
Migration Rate ◽  
Plastic Stents ◽  
Stent Patency ◽  
Phantom Model ◽  
Flow Phantom ◽  
And Migration ◽  
Animal Bile

Mo1430 The Biodurability of Advanced Hydrophilic Coating for Plastic Stents in a Bile Flow Phantom and a Swine Bile Duct Dilation Model

2015 ◽  
Vol 81 (5) ◽  
pp. AB417
Author(s):  
Chang-Il Kwon ◽  
Gwangil Kim ◽  
Seok Jeong ◽  
Don Haeng Lee ◽  
Kwang Hyun Ko ◽  
...  
Keyword(s):  
Bile Duct ◽  
Bile Flow ◽  
Plastic Stents ◽  
Hydrophilic Coating ◽  
Flow Phantom

scholarly journals Proximal Extrahepatic Bile Ducts: Comprehensive Review

2021 ◽  
Vol 4 (1) ◽  
pp. 74-93
Author(s):  
M. A. Shorikov ◽  
O. N. Sergeeva ◽  
M. G. Lapteva ◽  
N. A. Peregudov ◽  
B. I. Dolgushin
Keyword(s):  
Bile Duct ◽  
Bile Flow ◽  
Bile Ducts ◽  
Extrahepatic Bile Duct ◽  
Hepatic Duct ◽  
Biliary Tree ◽  
Comprehensive Review ◽  
Extrahepatic Bile Ducts ◽  
And Function ◽  
Variant Anatomy

Proximal extrahepatic bile ducts are the biliary tree segment within formal boundaries from cystic ductcommon hepatic duct junction to sectoral hepatic ducts. Despite being a focus of attention of diagnostic and interventional radiologists, endoscopists, hepatobiliary surgeons and transplantologists they weren’t comprehensively described in available papers. The majority of the authors regard bile duct confluence as a group of merging primitively arranged tubes providing bile flow. The information on the proximal extrahepatic bile duct embryonal development, variant anatomy, innervation, arterial, venous and lymphatic supply is too general and not detailed. The present review brought together and systemized exiting to the date data on anatomy and function of this biliary tract portion. Unique, different from the majority of hollow organs organization of the proximal extrahepatic bile duct adapts them to the flow of the bile, i.e. viscous aggressive due to pH about 8.0 and detergents fluid, under higher wall pressure than in other parts of biliary tree. 

scholarly journals A realistic flow phantom model of the carotid artery in preterm infants for training and research

Ultrasound ◽  
2020 ◽  
Vol 28 (3) ◽  
pp. 145-154
Author(s):  
Sujith Pereira ◽  
Jonathan Reeves ◽  
Malcolm Birch ◽  
Sakthi Finton-James ◽  
Komal Verma ◽  
...  
Keyword(s):  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Carotid Artery ◽  
Preterm Infants ◽  
Pulsatile Flow ◽  
Vessel Diameter ◽  
Flow Measurements ◽  
Phantom Model ◽  
Flow Phantom ◽  
Volume Measurements

Introduction Cerebral blood flow is increasingly monitored in preterm infants. Doppler ultrasound of the carotid artery is a widely available method but is operator dependent. Our aim was to design and produce a realistic flow phantom model of the carotid artery of preterm infants. Methods Data from cerebral blood flow measurements using Doppler ultrasound of the right common carotid artery from 21 premature newborn infants were used to produce a Doppler flow phantom model with three different vessel diameters. Vessel diameter, continuous and pulsatile flow volume measurements were performed by two blinded observers (with more than eight and 20 years of experience). Results Vessel diameter measurements using the phantom were underestimated by 7%. Continuous flow volume measurements were overestimated by 7% by both observers (observer 1 mean difference 1.5 ± 1.96 SD −3.3 to 6.3 ml/min versus observer 2, 1.9 ± 1.96 SD −3.6 to 7.4 ml/min). Pulsatile flow measurements were overestimated by 12.6% by observer 1 (2.7 ± 1.96 SD −0.6 to 5.9 ml/min) and by 7.8% by observer 2 (1.7 ± 1.96 SD −1.6 to 4.9 ml/min). There was good interobserver and intraobserver reliability for the majority of measurements using continuous and pulsatile flow. Conclusion It is feasible to produce a realistic flow phantom model of the neonatal carotid artery of preterm infants. Diameter measurements were underestimated and flow measurements were overestimated. These errors fell within acceptable limits for in vivo measurements. If these limitations were related to materials, this could be explored using a wall-less model. The flow phantom could be utilised for research and training clinicians in measuring cerebral blood flow using the carotid artery in this vulnerable group of infants.

Endoscopic stent configuration and bile flow rates in a variable diameter bile duct model

1990 ◽  
Vol 4 (2) ◽  
pp. 91-93 ◽  
Author(s):  
David Scheeres ◽  
William O'Brien ◽  
Lee Ponsky ◽  
Jeffrey Ponsky
Keyword(s):  
Bile Duct ◽  
Bile Flow ◽  
Flow Rates ◽  
Endoscopic Stent ◽  
Variable Diameter

Magnetic resonance phase velocity mapping through NiTi stents in a flow phantom model

2004 ◽  
Vol 21 (1) ◽  
pp. 59-65 ◽  
Author(s):  
Edward G. Walsh ◽  
Andrea D. Holton ◽  
Brigitta C. Brott ◽  
Ramakrishna Venugopalan ◽  
Andreas S. Anayiotos
Keyword(s):  
Magnetic Resonance ◽  
Phase Velocity ◽  
Velocity Mapping ◽  
Phase Velocity Mapping ◽  
Phantom Model ◽  
Flow Phantom

scholarly journals Features of endobiliary stenting in unresectable tumors in the hepatopancreatoduodenal zone

2021 ◽  
Vol 26 (3) ◽  
pp. 70-78
Author(s):  
D. N. Panchenkov ◽  
Yu. V. Ivanov ◽  
D. V. Sazonov ◽  
A. I. Zlobin ◽  
A. V. Smirnov ◽  
...  
Keyword(s):  
Bile Duct ◽  
Life Expectancy ◽  
Common Bile Duct ◽  
Obstructive Jaundice ◽  
Biliary Tract ◽  
Plastic Stents ◽  
Results Of Treatment ◽  
Nitinol Stents ◽  
The Common

Aim. Optimization of endobiliary stenting in patients with unresectable tumors of the organs in the hepatopancreatoduodenal zone, improving the prevention of complications, improving the immediate results of treatment and the quality of patient’s life.Material and methods. From 2011 to 2020, 47 patients with unresectable tumors in the hepatopancreatoduodenal zone underwent endoscopic transpapillary stenting of the common bile duct for obstructive jaundice. A plastic stent was used in 28 patients, and a self-expanding nitinol stent in 19 patients. The results of endobiliary stenting, complications, efficacy and safety of stenting, side effects, quality of biliary tract decompression were evaluated.Results. All patients were perform stenting of the common bile duct. Two complications were recorded during endoscopic transpapillary stenting: bleeding from the area of the major duodenal papilla, which was stopped endoscopically. In the immediate postoperative period – stent displacement was noted in 3 patients, blockage of the stent – in 2 cases, acute post-manipulative pancreatitis – in 1 case, cholangitis — in 2 patients. Satisfactory decompression of the biliary tract was achieved in 44 from 47 patients. There was 1 death.Conclusion. Endoscopic transpapillary stenting of the common bile duct is a low-traumatic, safe and effective method of biliary decompression for tumor obstructive jaundice. Plastic stents should be used for biliary drainage with a life expectancy of ≤6 months. Self-expanding nitinol stents with full or partial coverage is the best chose for life expectancy > 6 months.

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