What is one-time hypodermic needle injection

Subcutaneous injection is to inject the liquid into the subcutaneous tissue, because the subcutaneous tissue is loose, nerve, blood vessel, lymphatic fluid is rich, the drug is easy to absorb, but the injection has a sense of pain. It is commonly used in vaccine and vaccine prophylaxis, local anesthesia, and certain drugs such as epinephrine. Usually choose the lower margin of the lateral deltoid of the upper arm, the lower margin of the scapula or the abdomen (rabies vaccine), the outer thigh, etc. Generally, the needle is inserted into 1.5 ~ 2cm, and the drug solution can be pushed in if there is no blood return. Have excitant medicaments such as go armour kidney kidney gland element to wait, unfavorable subcutaneous injection. For a few patients with incomplete cardiac function or severe dehydration, subcutaneous infusion can also be used, with a long needle inserted subcutaneously into the inner side of the thigh, connected with an infusion device to slowly drip the liquid, absorption is also more satisfactory.

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