Engineering goals for future thoracic endografts-how can we make them more effective?

Area of Science:

• Biomedical Engineering
• Cardiovascular Surgery
• Medical Device Design

Background:

• Endovascular treatments, initially for abdominal aortic aneurysms (EVAR), are increasingly adapted for thoracic aortic repair (TEVAR).
• Patient populations are expanding, presenting more complex conditions and challenging anatomies for endovascular repair.
• Maturing stent graft designs are crucial for addressing these demanding thoracic applications.

Observation:

• The thoracic aorta presents unique biological parameters distinct from the abdominal aorta.
• Engineering considerations are vital for adapting stent graft designs to the thoracic environment.
• Key factors include materials, sealing mechanisms, deployment strategies, stent frame architecture, and migration resistance.

Findings:

• This article details the engineering considerations for modifying stent graft designs for current and future thoracic applications.
• It outlines the biological differences between thoracic and abdominal aortic environments.
• Specific design elements such as materials, sealing, deployment, frame architecture, and migration resistance are discussed.

Implications:

• Advancements in stent graft engineering are critical for expanding the applicability of endovascular repair in complex thoracic aortic disease.
• Understanding thoracic-specific biological parameters informs the development of more effective and durable devices.
• Future developments hold promise for improved treatment of challenging aortic conditions.