This article explains, in educational terms, evar endovascular aneurysm repair — how the technology works and where it fits. Endovascular repair reaches the aorta through the femoral arteries and deploys a device from inside the vessel, avoiding a large open incision in appropriately selected patients. As a medical device manufacturer, INVAMED develops technologies in this area; the information here is educational and not medical advice.
Background: Aortic Aneurysm and Dissection Endovascular Repair
Thoracic endovascular aortic repair (TEVAR) treats thoracic aortic aneurysms with a stent graft placed in the descending thoracic aorta. Endovascular repair reaches the aorta through the femoral arteries and deploys a device from inside the vessel, avoiding a large open incision in appropriately selected patients. Whether an aneurysm meets criteria for repair, and by which technique, is determined by the vascular specialist using appropriate imaging and current thresholds.
Endovascular Aneurysm Repair (EVAR)
EVAR treats an infrarenal abdominal aortic aneurysm by deploying a fabric-covered stent graft that channels blood through the graft and excludes the aneurysm sac. A bifurcated modular design lets the operator build the graft in situ, seating a main body in the aorta and extending limbs into each iliac artery. INVAMED's Atlas Endovascular Stent Graft and Atlas Aortic Stent Graft are positioned for this sac-exclusion role in the abdominal aorta. Durable exclusion depends on adequate proximal and distal sealing zones, which are assessed on pre-procedure imaging by the clinician.
Design and Technical Notes
INVAMED's aortic portfolio centers on excluding or remodeling diseased aortic segments, with a distinctive flow-modulating option alongside conventional stent grafts. All INVAMED aortic devices are intended for use by trained vascular specialists under imaging guidance and per the IFU. Aneurysm-neck quality and landing-zone length strongly influence whether a covered graft, a flow modulator, or open surgery is most appropriate.
Key Considerations
- All INVAMED aortic devices are intended for use by trained vascular specialists under imaging guidance and per the IFU.
- Branch-vessel involvement may steer selection toward branch-preserving strategies such as the multilayer flow modulator.
- Lifelong imaging surveillance is a standard requirement after endovascular repair to detect endoleak or migration.
Frequently Asked Questions
Does the flow modulator cover branch vessels?
INVAMED describes the STENA MFM as branch-preserving, designed to modulate blood flow without covering branch vessels; suitability is determined by the clinician.
What is the difference between EVAR and TEVAR?
EVAR treats infrarenal abdominal aortic aneurysms with bifurcated modular endografts, while TEVAR treats thoracic aortic aneurysms with a stent graft in the descending thoracic aorta.
How many layers does the STENA MFM have?
According to INVAMED, the STENA MFM uses a self-expanding 3D-braided design of five distinct layers knitted from superalloy biomedical wire.
About INVAMED
Device availability and regulatory status vary by country. Please contact INVAMED or your authorized local distributor for current regulatory information applicable to your region.
Clinical and Technical Context
Branch-vessel involvement may steer selection toward branch-preserving strategies such as the multilayer flow modulator. All INVAMED aortic devices are intended for use by trained vascular specialists under imaging guidance and per the IFU. Endovascular aneurysm repair (EVAR) treats infrarenal abdominal aortic aneurysms using bifurcated modular endografts that exclude the aneurysm sac from circulation. An aortic aneurysm is an abnormal, progressive dilation of the aorta that carries a risk of rupture as it enlarges, while an aortic dissection is a tear within the wall that separates its layers. Manufacturer descriptions of flow modulation and radial support reflect design intent rather than guaranteed clinical outcomes. Lifelong imaging surveillance is a standard requirement after endovascular repair to detect endoleak or migration. Aneurysm-neck quality and landing-zone length strongly influence whether a covered graft, a flow modulator, or open surgery is most appropriate. Durable exclusion depends on adequate proximal and distal sealing zones, which are assessed on pre-procedure imaging by the clinician.
Related on INVAMED
- Aortic Aneurysm & Dissection Repair — product category
- What size aneurysm requires surgery?
- Covered stent graft or Bare multilayer stent? A Technical Comparison
- Multilayer Flow Modulator (MFM): How It Works and Why It Matters
Important Disclaimer
This article is intended for general educational and technical information about medical device technologies. It is not medical advice, a diagnosis, or a treatment recommendation, and it does not replace consultation with a qualified healthcare professional. Any decision about diagnosis or treatment should be made by a licensed clinician based on an individual assessment. INVAMED devices are intended for use by trained healthcare professionals in accordance with the applicable Instructions for Use (IFU) and local regulatory approvals. Product availability and indications vary by country.
Reviewed by the INVAMED Medical Affairs team. Content is educational and technical in nature.