Injection (medicine)

Injection (medicine)

An injection is a method of delivering drugs or vaccines directly into a patient's body using a needle and syringe. This method bypasses the digestive system, allowing for immediate absorption of the substance into the bloodstream.

Types of injections

There are several types of injections, each targeting a different layer of the skin or tissue. These include:

• Intradermal injection: This type of injection is administered into the dermis, or the outermost layer of skin.
• Subcutaneous injection: This injection is given into the fatty layer of tissue just beneath the skin.
• Intramuscular injection: This injection is delivered into a muscle, allowing for faster absorption into the bloodstream.
• Intravenous injection: This injection is administered directly into a vein, providing immediate delivery of the substance into the bloodstream.

Procedure

The procedure for administering an injection varies depending on the type of injection and the specific medication being delivered. However, the general steps include:

1. Preparing the injection site with an antiseptic to prevent infection.
2. Inserting the needle at the correct angle and depth for the type of injection.
3. Delivering the medication by slowly pushing the plunger of the syringe.
4. Removing the needle and applying pressure to the injection site to prevent bleeding.

Risks and complications

While injections are generally safe, they can sometimes lead to complications such as:

• Pain at the injection site
• Infection
• Allergic reaction
• Bleeding or bruising
• Nerve damage

Patients should always consult with their healthcare provider before receiving an injection to discuss potential risks and benefits.

See also

• Drug administration
• Vaccine
• Needlestick injury

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  Drawing of syringes with needle

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  Needle insertion angles

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  Mantoux tuberculin skin test