Bile resistance of coated transjugular intrahepatic portosystemic shunt stents in a flow-model.
Invest Radiol
; 39(12): 717-22, 2004 Dec.
Article
em En
| MEDLINE
| ID: mdl-15550832
PURPOSE: We sought to test the bile resistance of transjugular intrahepatic portosystemic shunt (TIPS) stents with 3 different coatings. MATERIALS AND METHODS: Three stents with different coating materials (monolayer polyethylene terephthalate [PETP], monolayer polytetrafluoroethylene [PTFE], and double layer [PTFE]) were tested in a flow model. After testing the sealing of the system with isotonic saline solution, fresh human bile was circulated. Constant pressure was 50 cm H2O. Bile resistance of the stent membranes was analyzed. RESULTS: Two of the 3 stents proved completely resistant to water. Only the PETP stent was resistant to bile. The PTFE-coated stents were not bile resistant. CONCLUSION: The bile resistance of coated TIPS stents and, thus, the dependency of TIPS shunt patency is called into question. The stent with the reported superior patency rates does not show experimental bile resistance.
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Base de dados:
MEDLINE
Assunto principal:
Politetrafluoretileno
/
Bile
/
Stents
/
Polietilenotereftalatos
/
Derivação Portossistêmica Transjugular Intra-Hepática
Tipo de estudo:
Evaluation_studies
Limite:
Humans
Idioma:
En
Ano de publicação:
2004
Tipo de documento:
Article