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AIM To evaluate a new balloon-expandablestainless steel stent (Cordis stent) in atransjugular intrahepatic portosystemic shunt(TIPS) porcine model and compared withWallstent.METHODS TIPS was performed in 26 normaldomestic pigs weighing 20 kg-30 kg using aCordis stent or Wallstent (13 pigs in each stent).All pigs were sacrificed at the 14th day afterTIPS. The stent deployment delivery system,stent patency, and stent recoil after placementwere evaluated. Proliferative response inrepresentative histological sections from thecenter, hepatic and portal regions of the twostent designs were quantified.RESULTS The shunt was widely patent in 4pigs in the Cordis stent group (4/12, prematuredead in 1 pig), and in 5 pigs in the Wallstentgroup (5/13). All remaining stents of bothdesigns were occluded or stenotic. The meanquantified proliferation including thickness ofthe proliferation and the ratio of proliferation:total area in three assayed regions in Cordisstent and Wallstent was 2.18 mm:2.00 mm, and59.18 mm~2:51.66 mm~2, respectively (P>0.05).The delivery system and mechanical propertiesof the Cordis stent fuctioned well.CONCLUSION The new Cordis stent isappropriate for TIPS procedure.
AIM To evaluate a new balloon-expandable stable stainless steel stent (Cordis stent) in atransjugular intrahepatic portosystemic shunt (TIPS) porcine model and compared with Wallstent. METHODS TIPS was performed in 26 normaldomestic pigs weighing 20 kg-30 kg using aCordis stent or Wallstent (13 pigs in each stent. All pigs were sacrificed at the 14th day after TIPS. The stent deployment delivery system, stent patency, and stent recoil after placementwere evaluated. Proliferative response inrepresentative histological sections from the center, hepatic and portal regions of the twostent designs were quantified. RESULTS The shunt was widely patent in 4 pigs in the Cordis stent group (4/12, prematuredead in 1 pig), and in 5 pigs in the Wallstentgroup (5/13). All remaining stents of bothdesigns were occluded or stenotic. Themeanimalquantifined proliferation including thickness of the proliferation and the ratio of proliferation: total area in three assayed regions in Cordisstent and Wall content was 2.18 mm: 2.00 mm , and59.18 mm ~ 2: 51.66 mm ~ 2, respectively (P> 0.05). The delivery system and mechanical propertiesof the Cordis stent fuctioned well. CONCLUSION The new Cordis stent isappropriate for TIPS procedure.