What is hypodermic needle injection operation flow

Hypodermic injection is to inject a small amount of liquid medicine or biological preparations into the method of hypodermic organization, at unfavorable oral administration of drugs, and need to happen within a certain period of time, commonly used preventive inoculation, and use hypodermic injection. Subcutaneous injection is usually used in the lower margin of the deltoid muscle of the upper arm, both sides, auxiliary arms, back, thigh, anterior and lateral. Before operation, wash hands, wear masks, according to the doctor's advice, absorb liquid medicine, choose the injection site routine skin disinfection, dry, exhaust air. Tighten the local skin with one hand, hold the syringe in one hand, fix the needle plug with the index finger, the bevel of the needle is at a 30 to 40 degree Angle with the skin, and quickly Pierce the whole needle. Then loosen the tight skin of the hand, the piston, if there is no blood, slowly push the injection liquid.

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