KnowraHypodermic needleHypodermic needleA hollow, pointed tube designed to pierce the skin and deliver or withdraw fluids, usually attached to a syringe.BriefConnectSyringe: A device with a plunger and barrel that draws in or expels measured amounts of fluid. The needle commonly attaches to a syringe, whose plunger drives fluid through its lumen.Intramuscular injection: Delivery of a substance into skeletal muscle using a needle and syringe. Needle length and gauge help determine whether an injection reaches muscle.Alexander Wood: A Scottish physician credited with developing a practical hypodermic syringe in the 1850s. Wood's syringe-and-needle apparatus helped establish hypodermic drug administration.Intravenous catheter: A flexible tube inserted into a vein to provide ongoing vascular access. Unlike a hypodermic needle, a catheter can remain in the vein after its introducer needle is removed.Needle bevel: The angled surface formed at the tip of a needle by cutting its tube obliquely. The bevel creates the sharp point that helps the needle pierce skin.Subcutaneous injection: Delivery of a substance into the fatty tissue beneath the skin. Short needles are often used to place medicines in subcutaneous tissue.Charles Pravaz: A French surgeon who developed an early syringe for injecting medicines in the 1850s. Pravaz independently advanced a syringe design that used a fine hollow needle.Lancet: A small sharp instrument used to puncture skin, often to obtain a drop of blood. A lancet punctures skin but does not provide a hollow channel for fluid transfer.Needle gauge: A numerical system indicating a needle's outer diameter, with higher gauge numbers generally denoting thinner needles. Gauge describes the needle's thickness and affects flow, force, and tissue effects.Intravenous therapy: Administration of fluids or medicines directly into a vein. A needle can establish venous access for fluid delivery or blood sampling.Show all 24Linked from 1 pageStyletCompared with: It performs a similar piercing-and-fluid-transfer task, but is an engineered instrument.