Key result
Navius ZR1 locking stent reduces elastic recoil to ~2% vs slotted tube and coil designs.
Why the study?
The effect of various stent designs on minimization of postdilation stent recoil was not well characterized using quantitative intravascular ultrasound.
Does stent design affect the degree of elastic recoil in an in vitro model?
Does stent design affect the degree of elastic recoil in an in vitro model?
In an in vitro model, locking stent designs exhibit significantly less elastic recoil compared to flexible coil and slotted tube designs.
Answers are grounded in this paper and cite their sources.
Stent design may affect recoil in vitro; leaves open translation to clinical stent selection or outcomes.
The increase in minimum lumen diameter achieved by coronary stent placement can be further enhanced by reducing the immediate recoil that occurs after stent deployment. The effect of various stent designs-flexible coils, slotted tubes, and a locking stent-on minimization of postdilation stent recoil was evaluated using an in vitro model of circumferential compression. The stents were expanded to 7 atm (3.82 +/- 0.02 mm); as pressure was reduced, lumen diameter and cross-sectional area (CSA) were determined by on-line intravascular ultrasound imaging (30 MHz) positioned inside the dilating balloon (n = 10-15 inflation-deflation cycles). Stent recoil was assessed by calculation of percent change in CSA from 7 atm to negative balloon pressure: -33.1 +/- 5.6% (GR-II) and -22.4 +/- 3.8% (Wiktor) in the coil stents; -20.0 +/- 4.2% (JJIS coronary), -8.4 +/- 2.6% (JJIS biliary), and -6.9 +/- 1.5% (Multilink) in the slotted tube stents; and -1.9 +/- 3.2% in the Navius ZR1 locking stent (P < 0.05 vs. Multilink, P < 0.0001 vs. others). A range of resistances to recoil is demonstrated by this model, with coil stent designs undergoing greater elastic recoil than slotted tube stent designs. The locking stent design demonstrated the greatest radial strength and the most reduction in elastic recoil.
No takes yet. Share an insight, caveat, or question.
Yamamoto et al. (1999) studied Coronary stent placement (in vitro model). Locking stent design (Navius ZR1) vs. Slotted tube stents and flexible coil stents was evaluated on Percent change in cross-sectional area (CSA) from 7 atm to negative balloon pressure (stent recoil) (p=<0.05 vs. Multilink, <0.0001 vs. others). The Navius ZR1 locking stent demonstrated the greatest reduction in elastic recoil (-1.9%) compared to slotted tube stents like Multilink (-6.9%) and coil stents (P<0.05 vs Multilink).
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: