Medical double-sided needle type1 with visualisation

The needle is a sterile medical device of single use, designed for taking venous blood of the patient in a vacuum tube for in vitro diagnostics. It is a hollow tubular metal instrument, the ends of the tube have oblique cut and lance-shaped sharpening. One part of the needle is intended for insertion into the patient's vein, the other, closed with a rubber valve - for puncturing the rubber stopper of the vacuum tube. The central plastic part of the needle is a transparent visual chamber, which allows to control the correctness of the needle penetration into the vessel lumen. The central part of the needle has a thread for fixation in the needle holder. The part of the needle intended for insertion into a vein is coated with special silicone oil.