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J Vasc Interv Radiol. 1993 Jan-Feb;4(1):85-90.

Portal decompression after transjugular intrahepatic portosystemic shunt creation with use of a spiral Z stent.

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1
Dotter Institute for Interventional Therapy, Oregon Health Sciences University, Portland 97201.

Abstract

PURPOSE:

An experimental swine model of acute presinusoidal portal hypertension was used to investigate the feasibility of a spiral Z stent for transjugular intrahepatic portosystemic shunt (TIPS) placement and the correlation between the shunt (stent) size and degree of portal pressure decrease.

MATERIALS AND METHODS:

Twelve young swine were used. Acute portal hypertension was induced by means of selective injections of absolute alcohol, ethiodized oil, and polyvinyl alcohol sponge particles into intrahepatic portal branches.

RESULTS:

TIPS was successfully created in all swine by using spiral Z stents that were 6, 8, and 10 mm in diameter; each size stent was deployed in four animals. Being sufficiently flexible, spiral Z stents accommodated for curved shunt tracts. An average of 48% portal pressure decrease was achieved with 6-mm-diameter stents, 61% with 8-mm-diameter stents, and 87% with 10-mm-diameter stents.

CONCLUSION:

These results are in agreement with our clinical experience with use of Gianturco-Rösch Z stents for TIPS formation.

PMID:
8425096
[Indexed for MEDLINE]
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