vascular access sheath
Tubular device placed in blood vessel to facilitate catheter insertion during interventional procedures.
Full Definition
A short, hollow tube inserted into a blood vessel (typically femoral, radial, or brachial artery) to provide stable vascular access during angiographic and interventional procedures. The sheath consists of a dilator and outer tube, allowing multiple catheter exchanges without repeated vessel puncture. Sheaths are sized by French gauge, with larger sizes accommodating larger devices. Proper sheath management is crucial for preventing vascular complications such as bleeding, dissection, or thrombosis. The sheath remains in place throughout the procedure and is removed after completion.
Usage
Usage note: Size should be specified in French units when mentioned in procedural reports.
In Context
- "A 6-French vascular access sheath was placed in the right femoral artery." — Interventional procedure report
- "The sheath was upsized to accommodate the larger stent delivery system." — Angioplasty procedure note