Hypodermic needle injection method and location

The location of hypodermic needle injection is often selected at the lower edge of the deltoid muscle of the upper arm, the abdominal wall on both sides, the back, the front and outer side of the thigh, etc. It is mainly used for subcutaneous small-dose administration, vaccination and local anesthesia. The injection method of the hypodermic needle is: tighten the local skin with one hand, hold the syringe with the other hand to fix the needle plug with the index finger, the needle tip is inclined upward, at an angle of 30-40 degrees to the skin, and quickly pierce 1/2-2/3 of the needle stem. Under the skin, loosen the hand that tightens the skin, twitch the piston, and slowly inject the liquid if no blood is returned. Avoid penetrating the muscle layer during needle insertion, and make sure that the needle does not penetrate into the blood vessel.

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