Healing characteristics of intraarterial stent grafts in an injured artery model.

Abstract:

:Previous investigations reveal in the absence of endothelial cell (EC) injury, intraarterial polytetrafluoroethylene (PTFE) stent graft (SG) exhibit greater EC repaving than PTFE interposition grafts (CG). The investigation evaluated EC repaving of SG compared to CG after balloon injury. Twenty adult dogs underwent SG (n = 10) or CG (n = 10) placement in the infrarenal aorta after balloon injury with harvest at 1 and 6 weeks. Endothelial repaving, intima-to-media height ratios (IMHR), and inflammatory stains were performed. Endothelial repaving was greater in 6-week SG compared to CG (51% +/- 5.0 versus 10% +/- 5.0, p < or = 0.05). IMHR was less in 6-week SG compared to CG at the proximal (1.22 +/- 0.16 versus 1.82 +/- 0.16, p < or = 0.05) and distal anastomosis (0.81 +/- 0.25 versus 1.33 +/- 0.25, p < or = 0.05). Smooth muscle cell (SMC) alpha-actin was greater in 1-week SG compared to CG at the distal anastomosis (121.5 +/- 7.2 versus 94.0 +/- 7.2, p < or = 0.05). Proliferating cell nuclear antigen (PCNA) was less in 6-week SG compared to CG at the proximal (5.6 +/- 1.4 versus 9.4 +/- 1.1, p < or = 0.05) and distal anastomosis (3.8 +/- 0.6 versus 11.2 +/- 1.1, p < or = 0.05). Macrophage CD-44 was less in 6-week SG compared to CG at the proximal (10.4 +/- 1.6 versus 32.6 +/- 3.6, p < or = 0.05) and distal anastomosis (8.6 +/- 0.9 versus 35.6 +/- 3.6, p < or = 0.05). Intraarterial SG placed after balloon injury exhibited significantly greater endothelialization and less intimal hyperplasia when compared to CG.

journal_name

Ann Vasc Surg

authors

Weatherford DA,Ombrellaro MP,Schaeffer DO,Stevens SL,Sackman JE,Freeman MB,Goldman MH

doi

10.1007/s100169900010

subject

Has Abstract

pub_date

1997-01-01 00:00:00

pages

54-61

issue

1

eissn

0890-5096

issn

1615-5947

pii

S0890-5096(06)62115-8

journal_volume

11

pub_type

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