Where are hypodermic needles, intramuscular injections and intravenous (pulse) massage used?

Subcutaneous injection: It is used when the drug effect needs to be quickly achieved, and oral administration is impossible or inappropriate. For example, oral insulin is easily destroyed by digestive enzymes in the gastrointestinal tract and loses its effect, while subcutaneous injection is quickly absorbed.

2. Local anesthesia medication or preoperative medication.

3. Vaccination.

Intramuscular injection is mainly suitable for: intravenous injection is not suitable or impossible, when the effect is required to occur more quickly than subcutaneous injection, and when the injection of drugs with strong irritation or large doses is required.

Intravenous injection:

1. Drugs should not be taken orally, subcutaneously or intramuscularly, other methods are required

When the drug effect occurs quickly, intravenous injection or intravenous infusion can be used.

2. Other injection methods are not suitable for drugs due to high concentration, high irritation and large amount.

3. During diagnosis and testing, drugs are injected intravenously, such as X-rays of liver, kidney, gallbladder, etc.

4. Infusion and blood transfusion.

5. For intravenous nutrition therapy.

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