Laser Drug Delivery, No Needles Required

Ejected microjet in air. (a) Images of Er:YAG microjet at 408 mJ, 250 μs pulse duration showing jet velocity of ∼ 30 m / s . (b) Jet velocity shown for varying laser energy E = 0.5 (see more)
Citation: Mi-ae Park, Hun-jae Jang, Fedir V. Sirotkin, Jack J. Yoh, Opt. Lett. 37, 3894-3896 (2012).

Seoul National University researchers have developed a needleless drug injection system using infrared lasers.  Erbium-doped yttrium aluminum garnet (Er:YAG) lasers are usually used by dermatologists for skin treatments but Jack Yoh, professor of mechanical and aerospace engineering at the University, is taking the laser usage to the next level.  The Er:YAG lasers are capable of propelling liquids up to 70 mph and would make injections virtually pain-free.  Microscopic jets of medications would be blasted directly into the skin and feel like “being hit with a puff of air.”

(Source: eScienceNews)

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