Single-use endoscopic injection needles (Eco-Injectra) for sclerotherapy of varices in the digestive tract.
The intended use is drug sclerotherapy of varices in the human digestive tract, and the needle is used only together with an endoscope.
Angled positions. When the scope tip is turned back on itself the needle presses against the inside of the sheath, and the needle meets the metal at the sheath end. That is also why the needle lock matters: the exposed needle length is fixed before the puncture.
