Flared Polyurethane-covered Self-expandable Nitinol Stent for Malignant Biliary Obstruction Young-Min Han, MD, Gong-Yong Jin, MD, Seung-Ok Lee, MD, Hyo-Sung.

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Presentation transcript:

Flared Polyurethane-covered Self-expandable Nitinol Stent for Malignant Biliary Obstruction Young-Min Han, MD, Gong-Yong Jin, MD, Seung-Ok Lee, MD, Hyo-Sung Kwak, MD, Gyung-Ho Chung, MD Journal of Vascular and Interventional Radiology Volume 14, Issue 10, Pages 1291-1301 (October 2003) DOI: 10.1097/01.RVI.0000092902.31640.39 Copyright © 2003 Society of Interventional Radiology Terms and Conditions

Figure 1 Flared polyurethane-covered self-expanding Niti-S stent endoprosthesis. The stent is a woven monofilament structure made of nitinol and partially covered with high-elasticity polyurethane. Journal of Vascular and Interventional Radiology 2003 14, 1291-1301DOI: (10.1097/01.RVI.0000092902.31640.39) Copyright © 2003 Society of Interventional Radiology Terms and Conditions

Figure 2 Images from a 55-year-old man with metastatic gastric carcinoma. (a) PTBD demonstrates malfunction of the plastic stent. (b) Tubogram via PTBD after removal of the plastic stent with use of the snare technique reveals irregular narrowing of the proximal CBD. (c) The 1-week follow-up tubogram shows good stent function. The flared (arrows) and remnant portions of the stent are fully expanded. (d) The 14-week follow-up abdominal CT demonstrates good stent patency. Journal of Vascular and Interventional Radiology 2003 14, 1291-1301DOI: (10.1097/01.RVI.0000092902.31640.39) Copyright © 2003 Society of Interventional Radiology Terms and Conditions

Figure 3 Images from a 93-year-old woman with pancreatic head carcinoma. (a) Percutaneous transhepatic cholangiography demonstrates obstruction of the middle CBD. (b) One-week follow-up tubogram shows good stent function. (c) The 18-week follow-up tubogram shows no patency as a result of tumor ingrowth (arrows) in the stent. Journal of Vascular and Interventional Radiology 2003 14, 1291-1301DOI: (10.1097/01.RVI.0000092902.31640.39) Copyright © 2003 Society of Interventional Radiology Terms and Conditions

Figure 4 Images from a 66-year-old woman with CBD carcinoma. (a) The immediate follow-up tubogram shows good stent position and function. Percutaneous cystostomy was performed on an emergency basis before PTBD. (b) The 35-week follow-up tubogram shows sludge formation (arrows) in the stent. Journal of Vascular and Interventional Radiology 2003 14, 1291-1301DOI: (10.1097/01.RVI.0000092902.31640.39) Copyright © 2003 Society of Interventional Radiology Terms and Conditions

Figure 5 Graph showing cumulative results of Kaplan-Meier analysis of primary patency over time after biliary stent deployment. Journal of Vascular and Interventional Radiology 2003 14, 1291-1301DOI: (10.1097/01.RVI.0000092902.31640.39) Copyright © 2003 Society of Interventional Radiology Terms and Conditions

Figure 6 Graph showing cumulative results of Kaplan-Meier analysis of time to composite endpoint (ie, recurrent stent obstruction or patient death with patent stent) after biliary stent deployment. Journal of Vascular and Interventional Radiology 2003 14, 1291-1301DOI: (10.1097/01.RVI.0000092902.31640.39) Copyright © 2003 Society of Interventional Radiology Terms and Conditions