Fig. 2
From: Therapeutic experience and key techniques of tubeless percutaneous nephrolithotomy
Appearance and application of oblique sheath. (A). Dilator with a matching oblique sheath. (B). Front view of oblique sheath. (C). Side view of oblique sheath. (D-F). No bleeding in the channel by using oblique sheath. (G-I). Counterclockwise rotation of the oblique sheath resulted in a transition from a clear to a blurred view. The arrow indicated the site of vascular injury.
