Needle Hypodermic
A hypodermic needle is a thin, hollow, sharp-tipped instrument commonly used with a syringe to either inject substances into the body or extract fluids from it. The word “hypodermic” itself originates from the Greek words “hypo” meaning “under” and “derma” meaning “skin”, referring to the needle’s function of entering the skin.
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Description
A hypodermic needle is a thin, hollow, sharp-tipped instrument commonly used with a syringe to either inject substances into the body or extract fluids from it. The word “hypodermic” itself originates from the Greek words “hypo” meaning “under” and “derma” meaning “skin”, referring to the needle’s function of entering the skin.
Uses in medicine
Hypodermic needles are used for administering medications via subcutaneous, intramuscular, or intravenous routes. They are also used for drawing blood samples, removing and draining fluids from the body, establishing IV access, intradermal testing, and obtaining tissue samples for biopsy.
Anatomy and components
A hypodermic needle has a hub that connects to the syringe, a shaft for fluid delivery or extraction, a bevel for smooth insertion, and a lumen for fluid flow.
Gauge and length
Needle sizes are determined by gauge and length. Gauge refers to the needle’s diameter, with higher numbers indicating thinner needles. Length is the shaft’s length; shorter needles are for superficial injections, while longer ones are for deeper injections.
Importance in healthcare
Hypodermic needles are essential for safe and efficient medical procedures, from vaccinations and blood tests to more complex interventions.
