What is a blunt needle for beauty?

Needle style for blunt needles

The trocar 5 refers to a thin tube used to pierce the cavity, lumen or blood vessel of the human body. It has been used since about 1864. The trocar is derived from the Latin "reed tube". Now often referred to as blunt needles (microtrocars) to emphasize their size, the definition in aesthetic medicine applications6 may be stricter, i.e. “a fine needle with a non-sharp tip, designed for non-traumatic hypodermic injection… Inject fillers such as hyaluronic acid, collagen, botulinum toxin, etc.” While the cosmetic blunt needle looks similar to the needle it replaces, the blunt needle differs significantly in that the filler can only be pushed out through a small opening near the side of the rounded blunt needle.

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