Features:
■ The hand mainly distributes the main venous vascular system on the back of the hand, and can be practiced for venous injection and infusion (blood) puncture.
■ There is a clear sensation of falling when the needle is inserted, and there is a clear return of blood when the needle is punctured correctly.
■ The same part of the venous vessels and skin can withstand hundreds of repeated punctures without leaking.
