Hypodermic needle

safety18G19G

Product overview
Hypodermic needles are thin, hollow medical needles with a sharpened bevel used to penetrate the skin for injection or fluid withdrawal. They are used across clinical settings for vaccinations, IV access, blood sampling and therapeutic injections. Correct selection and handling are essential for effective and safe clinical use.

What's a gauge
The gauge number indicates needle thickness: the higher the gauge, the thinner the needle. Common clinical examples include:

• 18G — thicker needle for rapid fluid delivery or transfusion.
• 20G — balance between flow and patient comfort; common for IVs and blood draws.
• 22G — thinner and more comfortable; suitable for children or small veins.
• 25–31G — very fine needles for insulin and subcutaneous injections.

Color coding: quick identification
Needles are often color-coded to indicate gauge for rapid recognition:

• Green = 18G
• Pink = 20G
• Blue = 22G

Technical specifications

• Main components: hub (plastic or metal), shaft (hollow), bevel (angled tip).
• Common gauge options: 18G, 20G, 22G, 25–31G (higher gauge = thinner needle).
• Typical uses: 18G for rapid delivery/transfusion; 20G for IVs and blood draws; 22G for pediatric/small veins; 25–31G for insulin/subcutaneous.
• Color coding: green (18G), pink (20G), blue (22G).
• Safety: availability of guarded/retractable needles; disposal in dedicated sharps containers; no-recapping policy recommended.

Summary
Hypodermic needles are essential clinical tools. Appropriate selection by gauge and length, familiarity with component parts and consistent application of safety measures ensure effective and safe use.