Chapter 67 - Nonaortic stents and stent grafts

Question 1

Radial force definition

Answer 1

Force required to produce a 50% reduction in the luminal diameter of stent

Question 2

Temperature dependent states of nitinol

Answer 2

Martensite state - elongated crystalline structure at cooler temp
Austenite state - crystalline structure symmetric; shape memory

Question 3

Radiopacity between stainless steel and nitinol

Answer 3

Stainless steel more visible

Question 4

Closed cell stents vs open cell stents

Answer 4

Close = consistent interconnections of all stent wires
better trapping, less flexible

Open = not all interconnected; more movement and flexibility but potential for debris to embolize

Question 5

Sirolimus coated cordis self-expandable stent SIROCCO trial

Answer 5

Comparable results between DES and BMS

restenosis 22% at 2 years

Question 6

Exclemer laster RCT for treatment of fempop in stent restenosis EXCITE ISR

Answer 6

Laser atherectomy with PTA better than PTA alone in restenosis

Question 7

Femoral artery in stent restenosis FAIR trial

Answer 7

DCB better than PTA in in stent restenosis

Question 8

RELINE trial

Answer 8

Viabahn covered stent better than PTA in 1-2 year primary patency

Question 9

Bioabsorbable stent materal

Answer 9

poly-L-lactic acid

PLLA

Question 10

AMS INSIGHT trial

Answer 10

Bioabsorbable stent better than PTA alone with 6 month patency

Question 11

BIOLUX P-II result

Answer 11

Equivalent results of DCB vs PTA in bk vessels