Exempel på stent

• Alternative options, such as implantation of stents, need to be evaluated.

• It was decided to proceed with surgical exploration and, ifwarranted, to place a further stent under direct vision.

• This is to allow for a 1520% elastic recoil in diameter but there is little shortening of the stent during expansion.

• Four stents were successfully placed in the pulmonary arteries and three in the aorta.

• On the first postoperative day, the stent in the orifice of the right pulmonary vein migrated to the descending aorta.

• This resulted in peal formation either because of low flow or because of subobstruction of the stent.

• Only mild granulomatous reaction was observed adjacent to the stent struts and degradation products.

• This approach prevents the stent from slipping off the balloon when being advanced through difficult turns, particularly in the smaller infants.

• The diameters in the middle of the stent were 6.9+ 1.7 mm immediately after implantation, and 6.9+2.1 mm in the follow-up angiographies, respectively.

• The stents were placed under general anesthesia in piglets (n=7) 1-3 days old, weighing 1.4-2.25 kg via a cutdown in the neck.

• Sequential balloon angioplasty then permitted gradual enlargement of the newly created channel, and subsequent placement of stents established a persistently wide venoatrial communication.

• In conclusion, implantation ofendovascular stents is an effective palliative or even therapeutic approach in complex coarctation.

• Three stents slipped over the balloon catheter during manipulation.

• A stent was found in the descending aorta proximal to the celiac artery.

• At autopsy, fibrous obstruction was noted proximal to the stent, and thrombus within the stent.