From the analysis of the skin structure, where is the hypodermic injection needle performed on the skin?

Subcutaneous injection is to inject a small amount of liquid medicine into the subcutaneous tissue, absorb the liquid through small blood vessels and capillaries under the skin, and deliver the liquid to the target organ through the blood circulation. Compared with intramuscular injection, subcutaneous injection can slow down the absorption and have a long-lasting effect.

Subcutaneous injection method: Tighten the skin with the left hand, the needle and the skin are at an angle of 30 to 40 degrees, not more than 45 degrees, so as not to penetrate the muscle layer. Quickly pierce the needle stem 1/2 to 1/3, loosen the fixed syringe with the left hand, twitch the piston with the right hand, check that there is no return of blood, slowly inject the liquid under the skin, quickly withdraw the needle, and press the needle eye with a sterile cotton swab for 5 minutes.

The skin test is an intradermal injection, and the intradermal test is to inject the drug between the epidermis and the dermis of the skin.

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