Zone 1 deployment
Endovascular stent graft placement covering the left subclavian artery origin but preserving the left common carotid artery.
Full Definition
Zone 1 deployment refers to the proximal landing zone classification for thoracic endovascular aortic repair (TEVAR) where the proximal end of the stent graft is positioned to cover the origin of the left subclavian artery while maintaining patency of the left common carotid artery. This deployment zone requires careful preoperative planning regarding left subclavian revascularization and consideration of potential spinal cord ischemia risk. The classification system helps standardize communication regarding endograft positioning and associated procedural risks.
Usage
Usage note: Part of standardized aortic arch landing zone classification; specify if subclavian revascularization performed.
In Context
- "The patient underwent TEVAR with zone 1 deployment and prophylactic left subclavian-to-carotid transposition." — operative report
- "Preoperative planning confirmed adequate zone 1 landing zone length of 25mm for secure endograft seal." — pre-operative assessment