EnChEVAR Elevating ChEVAR therapy


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

Proven device combination for ChEVAR

EnChEVAR: Endurant II/IIs + Radiant offers the only on-label and CE-marked solution for ChEVAR.

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 Endurant II/IIs and Radiant stent grafts for ChEVAR.

Our experts tell it best.​Clinician experiences on EnChEVAR

Watch the video with experience of Prof. Reijnen and Prof. Donas on EnChEVAR technique with Endurant™ II/IIs system and Radiant™ covered stent.

Clinical outcomes

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.

Radiant balloon-expandable covered stent on transparent background

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


 N/A  23
20–22  1920  25


 2123  28


 2426  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 (mm)

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:

Soft wire for easy access to renal arteries

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

Renal wire balanced between stiffness and flexibility; atraumatic short tip

  • Cook Rosen™* wire guide

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.

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.


  • 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)

Inflation devices

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

Aortic catalog

Choose from a complete portfolio of market-leading aortic vascular therapies to treat aneurysm disease.

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™Third-party brands are trademarks of their respective owners.

Other covered stents include: GORE Viabahn®*, Bentley BeGraft™*, BD LifeStream™*.



Donas KP, Torsello GB, Piccoli G, et al. The PROTAGORAS study to evaluate the performance of the Endurant stent graft for patients with pararenal pathologic processes treated by the chimney/snorkel endovascular technique. J Vasc Surg. January 2016;63(1):1-7.


Pitoulias GA, Torsello G, Austermann M, et al. Outcomes of elective use of the chimney endovascular technique in pararenal aortic pathologic processes. J Vasc Surg. February 2021;73(2):433-442.

Brief statement: See the device manual for detailed information regarding the instructions for use, the implant procedure, indications, contraindications, warnings, precautions, and potential adverse events. For further information, contact your local Medtronic representative and/or consult the Medtronic website at medtronic.eu. For applicable products, consult instructions for use on www.medtronic.com/manuals. Manuals can be viewed using a current version of any major internet browser. For best results, use Adobe Acrobat® Reader with the browser.

Important Reminder: This information is intended only for users in markets where Medtronic products and therapies are approved or available for use as indicated within the respective product manuals. Content on specific Medtronic products and therapies is not intended for users in markets that do not have authorization for use.