landing zone
The anatomical segment of healthy aorta where an endovascular stent graft seals, critical for preventing endoleaks.
Full Definition
A landing zone refers to the anatomical region of normal, non-diseased aorta where the proximal and distal ends of an endovascular stent graft achieve seal and fixation. Adequate landing zones are essential for successful TEVAR or EVAR procedures, typically requiring at least 15-20mm of healthy aortic wall for secure attachment. Landing zones are numbered anatomically (0-4 for thoracic procedures) to standardize communication about coverage of arch vessels and treatment planning. Insufficient landing zones may require surgical debranching or fenestrated/branched grafts to achieve adequate seal.
Usage
Usage note: Always specify proximal and distal landing zones with measurements when documented in planning notes.
In Context
- "Preoperative imaging revealed adequate proximal and distal landing zones for standard TEVAR deployment." — Surgical planning report
- "The patient required left carotid-subclavian bypass to extend the proximal landing zone for aneurysm coverage." — Operative note