Intradermal injection

Intradermal injection is a method of injecting a substance into the dermis layer of the skin, typically for medical purposes such as allergy tests and tuberculosis screening. This method is used when a small amount of substance is to be introduced into the body and absorption is desired to be slow.

Procedure

The procedure for an intradermal injection typically involves the following steps:

1. The skin is cleaned with an antiseptic to prevent infection.
2. The needle is inserted into the skin at a 5 to 15 degree angle.
3. The substance is slowly injected into the dermis.
4. The needle is removed and the injection site is covered with a bandage.

Uses

Intradermal injections are commonly used for:

• Tuberculosis skin tests
• Allergy tests
• Local anesthesia
• Vaccinations, such as the BCG vaccine

Advantages and Disadvantages

The main advantage of intradermal injections is that they allow for slow absorption of the substance, which can be beneficial for certain types of tests and treatments. However, they can also be more painful than other types of injections and there is a risk of causing a skin reaction.

See Also

• Subcutaneous injection
• Intramuscular injection
• Intravenous injection

References

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  Needle insertion angles