Injection needle

Injection Needle

An Injection needle is a medical tool used to deliver medication into the body through the skin and underlying tissues. It is typically used in conjunction with a syringe, which holds the medication and provides the force to push it through the needle.

History[edit | edit source]

The concept of using a needle for injections was first proposed in the 17th century by Christopher Wren. However, it was not until the 19th century that the first practical injection needle was developed by Charles Pravaz and Alexander Wood. This early needle was made of silver and was used to inject morphine for pain relief.

Design[edit | edit source]

An injection needle consists of a hollow metal tube with a sharp point at one end and a hub at the other that attaches to a syringe. The sharp point, or bevel, is designed to penetrate the skin and underlying tissues with minimal pain. The diameter of the needle is measured in gauges, with a higher gauge number indicating a thinner needle.

Types[edit | edit source]

There are several types of injection needles, including intramuscular needles, subcutaneous needles, and intravenous needles. The type of needle used depends on the medication being delivered and the patient's condition.

Use[edit | edit source]

To use an injection needle, the healthcare provider first draws the medication into the syringe. The needle is then inserted into the appropriate part of the body, and the medication is injected. After use, the needle is disposed of in a sharps container to prevent needlestick injuries and the spread of infectious diseases.

Safety[edit | edit source]

Safety is a major concern when using injection needles. Needlestick injuries can lead to the transmission of diseases such as HIV and hepatitis. To prevent these injuries, many healthcare providers now use safety needles, which have a built-in safety device to shield the needle after use.