landing zone
Anatomical segment where an endovascular device achieves proximal or distal seal, critical for procedural success.
Full Definition
A landing zone refers to the anatomical segment of a blood vessel where an endovascular device, particularly stent-grafts, achieves adequate proximal or distal seal against the vessel wall. The concept is fundamental in endovascular aortic repair (EVAR) and thoracic endovascular aortic repair (TEVAR) procedures, where successful exclusion of aneurysmal segments depends on adequate seal zones. Optimal landing zones must be of appropriate length, diameter, and angulation, free from significant thrombus or calcification, and provide sufficient space for device deployment. Landing zone assessment drives device selection, sizing decisions, and determines procedural feasibility versus alternative surgical approaches.
Usage
Usage note: Hyphenate when used as compound modifier (landing-zone assessment); distinguish from general anatomical zones.
In Context
- "Pre-operative imaging confirmed adequate proximal and distal landing zones for TEVAR." — Surgical planning report
- "The short landing zone necessitated use of a fenestrated endograft design." — Device selection rationale