4A Ureteral Access Sheath
The 4A Ureteral Access Sheath is a single-use endourological device designed to establish a continuous working channel during retrograde intrarenal surgery (RIRS) and flexible ureteroscopy. Featuring a wire-reinforced shaft and hydrophilic coating, it facilitates repeated scope passages, optimizes intrarenal pressure control, and protects ureteral mucosa during stone management. Its atraumatic tapered dilator tip ensures smooth, low-friction insertion across the ureterovesical junction.