EnChEVAR with Endurant™ II/IIs stent graft system + Radiant™ balloon-expandable covered stent

Proven device combination for ChEVAR

EnChEVAR with Endurant™ II/IIs system + Radiant™ covered stent demonstrates durable clinical outcomes (mean f/u 24.6 ± 17.4 months)1:

  • 1.6% new late onset type Ia endoleak
  • 95.7% primary chimney graft patency

Proven, safe, and effective way to lengthen aortic sealing zones

Learn how EnChEVAR with Endurant™ II/IIs system + Radiant™ stent provides durable outcomes in challenging hostile sealing zones.

EnChEVAR deployment

Step-by-step deployment of the EndurantT™II/IIs and Radiant™ stent grafts for ChEVAR.||

EnChEVAR live case

Explore a unique real live case performed by Prof. Fazzini in a 3 min video.


Clinical outcomes

ENCHANT Trial1-year data release

EnChEVAR (Endurant II/IIs stent graft system + Radiant balloon-expandable covered stent) analysis (n = 62)3

ENCHANT is a multicentre, prospective, single-arm, post-market study to assess the clinical outcomes, safety, and performance of the Endurant II/IIs system used with balloon-expandable covered stents for treatment of juxtarenal aortic aneurysms with a short infrarenal neck in a real-world setting.


Key outcomes of the one year Kaplan-Meier analyses.

  • 29 centres in EU and Russia
  • Freedom from all-cause mortality: 87.0 ± 4.3%
  • Freedom from aneurysm rupture: 100%
  • Freedom from conversion: 100%
  • Freedom from all secondary procedures: 88.0 ± 4.3%
  • Freedom from secondary procedures to treat type la endoleak: 100%

PROTAGORAS study

The PROTAGORAS study1 evaluated the performance of the Endurant™ II/IIs stent graft for patients with pararenal pathologic processes that were treated by the chemistry/snorkel endovascular technique.

Standardised use of the Endurant™ II/IIs stent graft system and Radiant™ covered stent for ChEVAR demonstrated:

N = 128 patients1


  • 24.6 months mean radiologic follow-up (range, 0–61 months)
  • 100% technical success
  • New late onset of type Ia endoleaks: 1.6%
  • Primary patency of chimney grafts: 95.7%
  • AAA sac diameter regression/stability: 90.6%
  • Freedom from chimney graft-related reinterventions: 93.1%

Radiant™ covered stent shows significantly better performance in ChEVAR compared to other grafts, with 94.6% patency at midterm compared to 84.1% patency with other covered stents.2

View brochure for full details.

Experts testimonials

Our experts tell it best. Watch their testimonials

How does standardization improve clinical results?

Dr. Fazzini explains the benefits of the combination of Endurant™ II/IIs system and Radiant™ stent: safer procedure, shorter recovery times, and lower of reintervention rate.

Our experts tell it best.​ Clinician experiences on EnChEVAR

Prof. Reijnen and Prof. Donas share their clinical experience about EnChEVAR technique with Endurant™ II/IIs system and Radiant™ covered stent.


Stent graft sizing

Endurant™ II/IIs stent graft sizing guidelines

Vessel proximal diameter:
infrarenal EVAR (mm)

Vessel proximal diameter:
infrarenal ChEVAR (mm)
Proximal stent graft diameter
(mm)
19–20 N/A 23
21–22 19–20  25
23-25 21–23 28
26-28 24–26 32
29–32 27–30 36

Radiant™ stent graft sizing guidelines

Renal native diameter (mm)

Recommended Radiant diameter (mm)

5.4–6.2 6
6.3–7.2 7

Radiant™ stent graft size configurations

Diameter (mm)

Stent length (mm)

Catheter length (cm)

Catheter outer diameter (Fr)

6 22 120 6
6 32 120 7
6 38 120 7
6 59 120 7
7 22 120 7
7 32 120 7
7 38 120 7
7 59 120 7

Use this tool to see full ordering information and plan case specifics such as sizing and placement.


Preparing for the case

Recommended ancillary equipment§:

1. Soft wire for easy access to renal arteries

  • 0.035” soft Terumo GLIDEWIRE™* hydrophilic-coated guidewire

2. Renal wire balanced between stiffness and flexibility; atraumatic short tip

  • Cook Rosen™* wire guide

3. 7 F sheath, 90 cm length with atraumatic tip for renal entry

  • Medtronic TourGuide™ steerable sheath 7 F, 90 cm
  • Cook Flexor™* Shuttle™* guiding sheath, Terumo Destination™* guiding sheath

Shorter 16 F sheath or larger may be used for access during a two-chimney case.

4. Catheter — 5 F, minimum length of 110 cm to 125 cm

Must be able to pass through and extend beyond 90 cm sheath; variety of angles to support renal cannulation; vertebral multipurpose.

5. Balloons

  • Medtronic Reliant™ stent graft balloon catheter to achieve good conformability of the Medtronic Endurant II/IIs stent graft system with the aortic wall and the renal stents
  • Medtronic Admiral Xtreme™ PTA balloon catheter OTW 0.035“ assist in access to renal (4 mm x 40 mm)

6. Inflation devices

  • 20 cc syringe
  • 20 cc inflation device equipped with manometer