Economical arm IV injection

■  Venous puncture practice:
﹡When puncturing correctly, there is a noticeable sense of emptiness and the production of blood return
﹡After successful venipuncture, multiple nursing operations such as intravenous injection, infusion, blood collection, and transfusion can be performed, and the liquid  can be truly injected.
■  Can be practiced repeatedly.
■  The blood vessels, skin, and intramuscular injection modules can be replaced.