Intravenous injection: it is a medical method, that is, liquid substances such as blood, liquid medicine and nutrient solution are directly injected into veins. Intravenous injection can be divided into transient and persistent. Transient intravenous injection is usually injected directly into the vein with a syringe, which is a common "injection"; Continuous intravenous injection is realized by intravenous drip, commonly known as "drip".
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1, drugs should not be taken orally, subcutaneously or intramuscularly, and intravenous injection or intravenous infusion can be used when rapid drug effect is needed.
2. The drug has high concentration, great irritation and large dosage, which is not suitable for other injection methods.
3, diagnosis, testing, through intravenous injection of drugs, such as liver, kidney, gallbladder and other X-rays.
4, infusion and blood transfusion.
5, used for intravenous nutrition therapy.
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