Intravascular Ultrasound Evaluation of Interwoven Nitinol Stents at ImplantFrank J Arena* and Frank A Arena
Northoaks Medical Center, Hammond, Lousiana, USA
- *Corresponding Author:
- Frank J Arena
54 Preserve Lane
Mandeville, Louisiana 70471
IVUS Interwoven Nitinol at implant, USA
E-mail: [email protected]
Received Date: August 22, 2013; Accepted Date: September 09, 2013; Published Date: September 11, 2013
Citation: Arena FJ, Arena FA (2013) Intravascular Ultrasound Evaluation of Interwoven Nitinol Stents at Implant. J Vasc Med Surg 1: 116 doi: 10.4172/2329-6925.1000116
Copyright: © 2013 Arena FJ, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Purpose: To evaluate the performance of Interwoven Nitinol Stents placed in the Superficial Femoral and Popliteal arteries using Intravascular Ultrasound (IVUS).
Methods: 37 stented segments in 34 patients whose procedures involved using IVUS during their peripheral angioplasties were retrospectively examined. Twenty seven 5 mm stented segments and ten 6 mm segments were measured. The IVUS study showing each stented segment was measured at ten approximately equal distances. At each of these points the size of the lumen was measured. The area inside the stents, as well as the minimum and maximum diameters across the stent were determined. The minimal area from each segment was also obtained. These areas were averaged and the stent expansion ratio (SER), average in stent area/maximal stent area was determined for each segment. The minimum and maximum diameters in each segment were also determined and the Radial Stent Symmetry Index (RSSI), minimum/maximum stent diameter was calculated for each segment.
Results: The 5 mm Interwoven nitinol stent group achieved an SER of 96.5%. The 6 mm group achieved an SER of 87.83%. The minimal SER measurement among the 5 mm stents averaged 76.67% and the 6 mm stents 65.71%. The RSSI in the 5 mm segments were 90.49%, while the 6 mm group was 88.80%.
Conclusions: Interwoven Nitinol stents perform well at implant with consistent deployment areas across multiple stent sizes when used in the SFA and Popliteal arteries. RSSI calculations were generally consistent with a relatively round stent deployment.