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Jung Hoon Park - One of the best experts on this subject based on the ideXlab platform.

  • fluoroscopy guided peroral placement of a self expandable Metallic Stent for malignant jejunal obstruction in a non surgically altered stomach
    CardioVascular and Interventional Radiology, 2019
    Co-Authors: Jung Hoon Park, Zhe Wang, Joonmyeong Choi, Hongtao Hu, Nader Bekheet, Sung Hwan Yoon, Ho Young Song
    Abstract:

    : Malignant small bowel obstruction is a common and distressing complication in advanced cancer patients. Recently, Stent placement was reported to be a safe and effective alternative treatment. However, there are only a few case reports associated with Stent placement in malignant jejunal obstruction. Furthermore, most patients had a history of gastrectomy before Stent placement, which shortens the catheterization pathway. In our case series, we present five cases of malignant proximal jejunal obstruction in a non-surgically altered stomach in the management of fluoroscopy-guided Self-Expandable Metallic Stent placement and discuss the interventional management and clinical outcomes. LEVEL OF EVIDENCE: Level 4, Case Series.

  • ew 7197 eluting nano fiber covered self expandable Metallic Stent to prevent granulation tissue formation in a canine urethral model
    PLOS ONE, 2018
    Co-Authors: Jiaywei Tsauo, Jung Hoon Park, Sugeun Yang, Sung Gwon Gang, Ho Young Song
    Abstract:

    Purpose To evaluate an EW-7197-eluting nanofiber-covered Stent (NFCS) for suppressing granulation tissue formation after Stent placement in a canine urethral model. Materials and methods All experiments were approved by the committee of animal research. A total of 12 NFCSs were placed in the proximal and distal urethras of six dogs. Dogs were divided into two groups with 3 dogs each. The control Stent (CS) group received NFCSs and the drug Stent (DS) group received EW-7197 (1000 μg)-eluting NFCSs. All dogs were sacrificed 8 weeks after Stent placement Histologic findings of the Stented urethra were compared using the Mann-Whitney U test. Results Stent placement was technically successful in all dogs without procedure-related complications. On urethrographic analysis, the mean luminal diameter was significantly larger in the DS group than in the CS group at 4 and 8 weeks after Stent placement (all p 0.05). Conclusion The EW-7197-eluting NFCS is effective and safe for suppressing granulation tissue formation after Stent placement in a canine urethral model.

  • EW-7197 eluting nano-fiber covered Self-Expandable Metallic Stent to prevent granulation tissue formation in a canine urethral model - Fig 1
    2018
    Co-Authors: Kichang Han, Jiaywei Tsauo, Jung Hoon Park, Sugeun Yang, Sung Gwon Gang, Deok Hee Lee, Kun Yung Kim, Min Tae Kim, Dae-kee Kim, Dong-hyun Kim
    Abstract:

    Representative optical images of (A) Nanofiber-covered, Self-Expandable Metallic Stent and (B) scanning electron micrographs of EW-7197 loaded nanofibers. The scale bars are 30 μm and 10 μm.

  • EW-7197 eluting nano-fiber covered Self-Expandable Metallic Stent to prevent granulation tissue formation in a canine urethral model
    2018
    Co-Authors: Kichang Han, Jiaywei Tsauo, Jung Hoon Park, Sugeun Yang, Sung Gwon Gang, Deok Hee Lee, Kun Yung Kim, Min Tae Kim, Dae-kee Kim, Dong-hyun Kim
    Abstract:

    PurposeTo evaluate an EW-7197-eluting nanofiber-covered Stent (NFCS) for suppressing granulation tissue formation after Stent placement in a canine urethral model.Materials and methodsAll experiments were approved by the committee of animal research. A total of 12 NFCSs were placed in the proximal and distal urethras of six dogs. Dogs were divided into two groups with 3 dogs each. The control Stent (CS) group received NFCSs and the drug Stent (DS) group received EW-7197 (1000 μg)-eluting NFCSs. All dogs were sacrificed 8 weeks after Stent placement Histologic findings of the Stented urethra were compared using the Mann-Whitney U test.ResultsStent placement was technically successful in all dogs without procedure-related complications. On urethrographic analysis, the mean luminal diameter was significantly larger in the DS group than in the CS group at 4 and 8 weeks after Stent placement (all p < 0.001). On histological examination, mean thicknesses of the papillary projection, thickness of submucosal fibrosis, number of epithelial layers, and degree of collagen deposition were significantly lower in the DS group than in the CS group (all p < 0.001), whereas the mean degree of inflammatory cell infiltration was not significantly different (p > 0.05).ConclusionThe EW-7197-eluting NFCS is effective and safe for suppressing granulation tissue formation after Stent placement in a canine urethral model.

  • 3D-printed phantom study for investigating Stent abutment during gastroduodenal Stent placement for gastric outlet obstruction
    'Springer Science and Business Media LLC', 2017
    Co-Authors: Guk Bae Kim, Jiaywei Tsauo, Jung Hoon Park, Ho Young Song, Kun Yung Kim, Min Tae Kim, Namkug Kim, Hyun Kyung Song, Eun Jung Jun, Do Hoon Kim
    Abstract:

    Abstract Background Placing a Self-Expandable Metallic Stent (SEMS) is safe and effective for the palliative treatment of malignant gastroduodenal (GD) strictures. SEMS abutment in the duodenal wall is associated with increased food impaction, resulting in higher Stent malfunction and shorter Stent patency. The desire to evaluate the mechanism and significance of Stent abutment led us to design an in vitro experiment using a flexible anthropomorphic three-dimensional (3D)-printed GD phantom model. Results A GD phantom was fabricated using 3D printer data after performing computed tomography gastrography. A partially covered (PC) or fully covered (FC) Stent was placed so that its distal end abutted onto the duodenal wall in groups PC-1 and FC-1 or its distal end was sufficiently directed caudally in groups PC-2 and FC-2. The elapsed times of the inflowing of three diets (liquid, soft, and solid) were measured in the GD phantom under fluoroscopic guidance. There was no significant difference in the mean elapsed times for the liquid diet among the four groups. For the soft diet, the mean elapsed times in groups PC-1 and FC-1 were longer than those in groups PC-2 and FC-2 (P = 0.018 and P 

Ho Young Song - One of the best experts on this subject based on the ideXlab platform.

  • fluoroscopy guided peroral placement of a self expandable Metallic Stent for malignant jejunal obstruction in a non surgically altered stomach
    CardioVascular and Interventional Radiology, 2019
    Co-Authors: Jung Hoon Park, Zhe Wang, Joonmyeong Choi, Hongtao Hu, Nader Bekheet, Sung Hwan Yoon, Ho Young Song
    Abstract:

    : Malignant small bowel obstruction is a common and distressing complication in advanced cancer patients. Recently, Stent placement was reported to be a safe and effective alternative treatment. However, there are only a few case reports associated with Stent placement in malignant jejunal obstruction. Furthermore, most patients had a history of gastrectomy before Stent placement, which shortens the catheterization pathway. In our case series, we present five cases of malignant proximal jejunal obstruction in a non-surgically altered stomach in the management of fluoroscopy-guided Self-Expandable Metallic Stent placement and discuss the interventional management and clinical outcomes. LEVEL OF EVIDENCE: Level 4, Case Series.

  • ew 7197 eluting nano fiber covered self expandable Metallic Stent to prevent granulation tissue formation in a canine urethral model
    PLOS ONE, 2018
    Co-Authors: Jiaywei Tsauo, Jung Hoon Park, Sugeun Yang, Sung Gwon Gang, Ho Young Song
    Abstract:

    Purpose To evaluate an EW-7197-eluting nanofiber-covered Stent (NFCS) for suppressing granulation tissue formation after Stent placement in a canine urethral model. Materials and methods All experiments were approved by the committee of animal research. A total of 12 NFCSs were placed in the proximal and distal urethras of six dogs. Dogs were divided into two groups with 3 dogs each. The control Stent (CS) group received NFCSs and the drug Stent (DS) group received EW-7197 (1000 μg)-eluting NFCSs. All dogs were sacrificed 8 weeks after Stent placement Histologic findings of the Stented urethra were compared using the Mann-Whitney U test. Results Stent placement was technically successful in all dogs without procedure-related complications. On urethrographic analysis, the mean luminal diameter was significantly larger in the DS group than in the CS group at 4 and 8 weeks after Stent placement (all p 0.05). Conclusion The EW-7197-eluting NFCS is effective and safe for suppressing granulation tissue formation after Stent placement in a canine urethral model.

  • 3D-printed phantom study for investigating Stent abutment during gastroduodenal Stent placement for gastric outlet obstruction
    'Springer Science and Business Media LLC', 2017
    Co-Authors: Guk Bae Kim, Jiaywei Tsauo, Jung Hoon Park, Ho Young Song, Kun Yung Kim, Min Tae Kim, Namkug Kim, Hyun Kyung Song, Eun Jung Jun, Do Hoon Kim
    Abstract:

    Abstract Background Placing a Self-Expandable Metallic Stent (SEMS) is safe and effective for the palliative treatment of malignant gastroduodenal (GD) strictures. SEMS abutment in the duodenal wall is associated with increased food impaction, resulting in higher Stent malfunction and shorter Stent patency. The desire to evaluate the mechanism and significance of Stent abutment led us to design an in vitro experiment using a flexible anthropomorphic three-dimensional (3D)-printed GD phantom model. Results A GD phantom was fabricated using 3D printer data after performing computed tomography gastrography. A partially covered (PC) or fully covered (FC) Stent was placed so that its distal end abutted onto the duodenal wall in groups PC-1 and FC-1 or its distal end was sufficiently directed caudally in groups PC-2 and FC-2. The elapsed times of the inflowing of three diets (liquid, soft, and solid) were measured in the GD phantom under fluoroscopic guidance. There was no significant difference in the mean elapsed times for the liquid diet among the four groups. For the soft diet, the mean elapsed times in groups PC-1 and FC-1 were longer than those in groups PC-2 and FC-2 (P = 0.018 and P 

  • Development of gastroduodenal Self-Expandable Metallic Stents: 30 years of trial and error
    Society of Gastrointestinal Intervention, 2016
    Co-Authors: Jiaywei Tsauo, Jung Hoon Park, Ho Young Song
    Abstract:

    In 1991, the author (H.Y.S.) reported the first case of Self-Expandable Metallic Stent (SEMS) placement in a patient with recurrent cancer after gastrojejunostomy. Since then SEMS placement has developed into a well-established method for the palliative treatment of malignant gastroduodenal obstruction. This year marks the 30th year the author has been implicated in the development of gastrointestinal SEMSs. Thus far, the author has developed successively a total of six generations of gastroduodenal SEMSs through trial and error over the years. In the present article, the author reviews his personal experience in developing gastroduodenal Stents

  • evaluation of formation of granulation tissue caused by Metallic Stent placement in a rat urethral model
    Journal of Vascular and Interventional Radiology, 2010
    Co-Authors: Ho Young Song, Jung Hoon Park, Jin Hyoung Kim, Cheol Woong Woo, Tae Hyung Kim, Gyungyub Gong
    Abstract:

    Purpose To evaluate the feasibility of Metallic Stent placement and the formation of granulation tissue caused by Stent placement in a rat urethral model. Materials and Methods A bare self-expanding Metallic Stent was inserted in the urethra under fluoroscopic guidance in 20 male Sprague-Dawley rats. Ten rats were euthanized at 4 weeks (group A), and the other 10 were euthanized at 8 weeks after Stent placement (group B). Stenosis diameter, number of epithelial layers, degree of inflammatory cell infiltration, thickness of submucosal fibrosis, and percentage of granulation tissue area were assessed. Results Stent placement was technically successful in all rats. Urethrograms showed perforation in three rats, partial migration in three, and stone formation in four. Granulation tissue formation was observed in all rats at the Stent-implanted urethra, and the average percentage of granulation tissue area accounted for 41% and 45% of the original urethral lumen area in groups A and B, respectively. Urethrograms and urethral specimens showed significantly less stenosis diameter, less thickness of submucosal fibrosis, and lower percentage of granulation tissue area in the proximal urethra than in the distal urethra in both groups ( P P = .028). Conclusions Placement of a Self-Expandable Metallic Stent proved to be feasible in the rat urethra and an efficient approach to stimulate granulation tissue formation as a potential model for reproducing the mechanisms of restenosis.

Nunzio Salfi - One of the best experts on this subject based on the ideXlab platform.

  • does Stent placement for advanced colon cancer increase the risk of perforation during bevacizumab based therapy
    Clinical Gastroenterology and Hepatology, 2009
    Co-Authors: Vincenzo Cennamo, Lorenzo Fuccio, V Mutri, Maria Eugenia Minardi, Leonardo Henry Eusebi, Liza Ceroni, Liboria Laterza, Luca Ansaloni, Antonio Daniele Pinna, Nunzio Salfi
    Abstract:

    BACKGROUND & AIMS: Data on the safety of bevacizumab-based therapies for patients carrying a Self-Expandable Metallic Stent (SEMS) for occlusive colon cancer are lacking. We report 2 cases of colon perforation observed in our case series of patients with SEMS for occlusive colon cancer. METHODS: Patients with occlusive symptoms caused by colon cancer received a colonic Stent under endoscopic and radiologic guidance. RESULTS: Over a 10-month period, 28 patients with occlusive colon cancer were treated with Stent placement. The Stent was placed as a bridge to surgery in 12 patients who were treated surgically within 4 to 78 days after the endoscopic procedures, without any Stent-related complications. Seven patients did not receive any other antitumor treatment as a result of concomitant comorbidities. Nine patients with both primary tumor and metastatic lesions were treated with medical therapy. Over a median follow-up period of 131 days colonic perforation occurred in the 2 patients treated with a combination of capecitabine and oxaliplatin plus bevacizumab. CONCLUSIONS: Further studies are needed to clarify whether SEMS placement increases the risk of perforation caused by bevacizumab-based therapies.

  • does Stent placement for advanced colon cancer increase the risk of perforation during bevacizumab based therapy
    Clinical Gastroenterology and Hepatology, 2009
    Co-Authors: Vincenzo Cennamo, Lorenzo Fuccio, V Mutri, Maria Eugenia Minardi, Leonardo Henry Eusebi, Liza Ceroni, Liboria Laterza, Luca Ansaloni, Antonio Daniele Pinna, Nunzio Salfi
    Abstract:

    BACKGROUND & AIMS: Data on the safety of bevacizumab-based therapies for patients carrying a Self-Expandable Metallic Stent (SEMS) for occlusive colon cancer are lacking. We report 2 cases of colon perforation observed in our case series of patients with SEMS for occlusive colon cancer. METHODS: Patients with occlusive symptoms caused by colon cancer received a colonic Stent under endoscopic and radiologic guidance. RESULTS: Over a 10-month period, 28 patients with occlusive colon cancer were treated with Stent placement. The Stent was placed as a bridge to surgery in 12 patients who were treated surgically within 4 to 78 days after the endoscopic procedures, without any Stent-related complications. Seven patients did not receive any other antitumor treatment as a result of concomitant comorbidities. Nine patients with both primary tumor and metastatic lesions were treated with medical therapy. Over a median follow-up period of 131 days colonic perforation occurred in the 2 patients treated with a combination of capecitabine and oxaliplatin plus bevacizumab. CONCLUSIONS: Further studies are needed to clarify whether SEMS placement increases the risk of perforation caused by bevacizumab-based therapies.

  • endoscopy corner does Stent placement for advanced colon cancer increase the risk of perforation during bevacizumab based therapy
    2009
    Co-Authors: Vincenzo Cennamo, Lorenzo Fuccio, V Mutri, Maria Eugenia Minardi, Leonardo Henry Eusebi, Liza Ceroni, Liboria Laterza, Luca Ansaloni, Antonio Daniele Pinna, Nunzio Salfi
    Abstract:

    BACKGROUND & AIMS: Data on the safety of bevacizumab-based therapies for patients carrying a Self-Expandable Metallic Stent (SEMS) for occlusive colon cancer are lacking. We report 2 cases of colon perforation observed in our case series of patients with SEMS for occlusive colon cancer. METHODS: Patients with occlusive symptoms caused by colon cancer received a colonic Stent under endoscopic and radiologic guidance. RESULTS: Over a 10-month period, 28 patients with occlusive colon cancer were treated with Stent placement. The Stent was placed as a bridge to surgery in 12 patients who were treated surgically within 4 to 78 days after the endoscopic procedures, without any Stent-related complications. Seven patients did not receive any other antitumor treatment as a result of concomitant comorbidities. Nine patients with both primary tumor and metastatic lesions were treated with medical therapy. Over a median follow-up period of 131 days colonic perforation occurred in the 2 patients treated with a combination of capecitabine and oxaliplatin plus bevacizumab. CONCLUSIONS: Further studies are needed to clarify whether SEMS placement increases the risk of perforation caused by bevacizumab-based therapies.

Giampaolo Iacopini - One of the best experts on this subject based on the ideXlab platform.

  • preoperative colonoscopy after self expandable Metallic Stent placement in patients with acute neoplastic colon obstruction
    Gastrointestinal Endoscopy, 2006
    Co-Authors: M A Vitale, G Villotti, Lucia Dalba, Stefano Frontespezi, F Iacopini, Giampaolo Iacopini
    Abstract:

    Background In patients with colorectal cancer, a preoperative colonoscopy is recommended to exclude synchronous lesions. Unfortunately, between 7% and 29% of patients with colorectal cancer present with acute colonic obstruction, making complete colonoscopy impossible. Objective The aim of our study was to evaluate the feasibility of a preoperative colonoscopy after effective Stent placement in patients with acute neoplastic obstruction. Design Single-center prospective study. Setting All examinations were carried out at a tertiary referral center with 24-hour emergency endoscopy service. Patients Fifty-seven patients with acute neoplastic colon obstruction. Interventions Patients who recovered from an acute colon obstruction by an effective Stent placement and who had a resectable cancer underwent a preoperative colonoscopy. Main Outcome Measurements Patients with a resectable cancer, complete preoperative colonoscopies, and synchronous lesions rates. Results Self-Expandable Metallic Stents (SEMS) were placed in 50 of 57 patients (87.8%). Thirty-one of 50 patients had a resectable cancer (62%), and a complete preoperative colonoscopy was possible in 29 of 31 patients (93.4%). A synchronous cancer was detected in 3 patients (9.6%), changing the surgical plan. Limitations Seven patients in whom the SEMS placement (12.2%) was unsuccessful underwent an urgent surgical intervention. Nineteen of 50 patients who had Stent placement were not eligible for our study because of unresectable cancer. Conclusions Our study indicates that it is feasible in a majority of patients to perform full preoperative colonoscopy after relief of acute colonic obstruction with SEMS before surgical resection.

  • preoperative colonoscopy after self expandable Metallic Stent placement in patients with acute neoplastic colon obstruction
    Gastrointestinal Endoscopy, 2006
    Co-Authors: M A Vitale, G Villotti, Lucia Dalba, Stefano Frontespezi, F Iacopini, Giampaolo Iacopini
    Abstract:

    Background In patients with colorectal cancer, a preoperative colonoscopy is recommended to exclude synchronous lesions. Unfortunately, between 7% and 29% of patients with colorectal cancer present with acute colonic obstruction, making complete colonoscopy impossible. Objective The aim of our study was to evaluate the feasibility of a preoperative colonoscopy after effective Stent placement in patients with acute neoplastic obstruction. Design Single-center prospective study. Setting All examinations were carried out at a tertiary referral center with 24-hour emergency endoscopy service. Patients Fifty-seven patients with acute neoplastic colon obstruction. Interventions Patients who recovered from an acute colon obstruction by an effective Stent placement and who had a resectable cancer underwent a preoperative colonoscopy. Main Outcome Measurements Patients with a resectable cancer, complete preoperative colonoscopies, and synchronous lesions rates. Results Self-Expandable Metallic Stents (SEMS) were placed in 50 of 57 patients (87.8%). Thirty-one of 50 patients had a resectable cancer (62%), and a complete preoperative colonoscopy was possible in 29 of 31 patients (93.4%). A synchronous cancer was detected in 3 patients (9.6%), changing the surgical plan. Limitations Seven patients in whom the SEMS placement (12.2%) was unsuccessful underwent an urgent surgical intervention. Nineteen of 50 patients who had Stent placement were not eligible for our study because of unresectable cancer. Conclusions Our study indicates that it is feasible in a majority of patients to perform full preoperative colonoscopy after relief of acute colonic obstruction with SEMS before surgical resection.

Jiaywei Tsauo - One of the best experts on this subject based on the ideXlab platform.

  • ew 7197 eluting nano fiber covered self expandable Metallic Stent to prevent granulation tissue formation in a canine urethral model
    PLOS ONE, 2018
    Co-Authors: Jiaywei Tsauo, Jung Hoon Park, Sugeun Yang, Sung Gwon Gang, Ho Young Song
    Abstract:

    Purpose To evaluate an EW-7197-eluting nanofiber-covered Stent (NFCS) for suppressing granulation tissue formation after Stent placement in a canine urethral model. Materials and methods All experiments were approved by the committee of animal research. A total of 12 NFCSs were placed in the proximal and distal urethras of six dogs. Dogs were divided into two groups with 3 dogs each. The control Stent (CS) group received NFCSs and the drug Stent (DS) group received EW-7197 (1000 μg)-eluting NFCSs. All dogs were sacrificed 8 weeks after Stent placement Histologic findings of the Stented urethra were compared using the Mann-Whitney U test. Results Stent placement was technically successful in all dogs without procedure-related complications. On urethrographic analysis, the mean luminal diameter was significantly larger in the DS group than in the CS group at 4 and 8 weeks after Stent placement (all p 0.05). Conclusion The EW-7197-eluting NFCS is effective and safe for suppressing granulation tissue formation after Stent placement in a canine urethral model.

  • EW-7197 eluting nano-fiber covered Self-Expandable Metallic Stent to prevent granulation tissue formation in a canine urethral model - Fig 1
    2018
    Co-Authors: Kichang Han, Jiaywei Tsauo, Jung Hoon Park, Sugeun Yang, Sung Gwon Gang, Deok Hee Lee, Kun Yung Kim, Min Tae Kim, Dae-kee Kim, Dong-hyun Kim
    Abstract:

    Representative optical images of (A) Nanofiber-covered, Self-Expandable Metallic Stent and (B) scanning electron micrographs of EW-7197 loaded nanofibers. The scale bars are 30 μm and 10 μm.

  • EW-7197 eluting nano-fiber covered Self-Expandable Metallic Stent to prevent granulation tissue formation in a canine urethral model
    2018
    Co-Authors: Kichang Han, Jiaywei Tsauo, Jung Hoon Park, Sugeun Yang, Sung Gwon Gang, Deok Hee Lee, Kun Yung Kim, Min Tae Kim, Dae-kee Kim, Dong-hyun Kim
    Abstract:

    PurposeTo evaluate an EW-7197-eluting nanofiber-covered Stent (NFCS) for suppressing granulation tissue formation after Stent placement in a canine urethral model.Materials and methodsAll experiments were approved by the committee of animal research. A total of 12 NFCSs were placed in the proximal and distal urethras of six dogs. Dogs were divided into two groups with 3 dogs each. The control Stent (CS) group received NFCSs and the drug Stent (DS) group received EW-7197 (1000 μg)-eluting NFCSs. All dogs were sacrificed 8 weeks after Stent placement Histologic findings of the Stented urethra were compared using the Mann-Whitney U test.ResultsStent placement was technically successful in all dogs without procedure-related complications. On urethrographic analysis, the mean luminal diameter was significantly larger in the DS group than in the CS group at 4 and 8 weeks after Stent placement (all p < 0.001). On histological examination, mean thicknesses of the papillary projection, thickness of submucosal fibrosis, number of epithelial layers, and degree of collagen deposition were significantly lower in the DS group than in the CS group (all p < 0.001), whereas the mean degree of inflammatory cell infiltration was not significantly different (p > 0.05).ConclusionThe EW-7197-eluting NFCS is effective and safe for suppressing granulation tissue formation after Stent placement in a canine urethral model.

  • 3D-printed phantom study for investigating Stent abutment during gastroduodenal Stent placement for gastric outlet obstruction
    'Springer Science and Business Media LLC', 2017
    Co-Authors: Guk Bae Kim, Jiaywei Tsauo, Jung Hoon Park, Ho Young Song, Kun Yung Kim, Min Tae Kim, Namkug Kim, Hyun Kyung Song, Eun Jung Jun, Do Hoon Kim
    Abstract:

    Abstract Background Placing a Self-Expandable Metallic Stent (SEMS) is safe and effective for the palliative treatment of malignant gastroduodenal (GD) strictures. SEMS abutment in the duodenal wall is associated with increased food impaction, resulting in higher Stent malfunction and shorter Stent patency. The desire to evaluate the mechanism and significance of Stent abutment led us to design an in vitro experiment using a flexible anthropomorphic three-dimensional (3D)-printed GD phantom model. Results A GD phantom was fabricated using 3D printer data after performing computed tomography gastrography. A partially covered (PC) or fully covered (FC) Stent was placed so that its distal end abutted onto the duodenal wall in groups PC-1 and FC-1 or its distal end was sufficiently directed caudally in groups PC-2 and FC-2. The elapsed times of the inflowing of three diets (liquid, soft, and solid) were measured in the GD phantom under fluoroscopic guidance. There was no significant difference in the mean elapsed times for the liquid diet among the four groups. For the soft diet, the mean elapsed times in groups PC-1 and FC-1 were longer than those in groups PC-2 and FC-2 (P = 0.018 and P 

  • Development of gastroduodenal Self-Expandable Metallic Stents: 30 years of trial and error
    Society of Gastrointestinal Intervention, 2016
    Co-Authors: Jiaywei Tsauo, Jung Hoon Park, Ho Young Song
    Abstract:

    In 1991, the author (H.Y.S.) reported the first case of Self-Expandable Metallic Stent (SEMS) placement in a patient with recurrent cancer after gastrojejunostomy. Since then SEMS placement has developed into a well-established method for the palliative treatment of malignant gastroduodenal obstruction. This year marks the 30th year the author has been implicated in the development of gastrointestinal SEMSs. Thus far, the author has developed successively a total of six generations of gastroduodenal SEMSs through trial and error over the years. In the present article, the author reviews his personal experience in developing gastroduodenal Stents