South Korean scientists have developed a new system that blasts microscopic jets of drugs into the skin making an injection a painless affair. The system uses an erbium-doped YAG laser to propel a tiny, precise stream of medicine with just the right amount of force.
The impacting jet pressure is higher than the skin tensile strength and thus causes the jet to smoothly penetrate into the targeted depth underneath the skin, without any splashback of the drug.
It penetrate up to several millimetres beneath the skin surface, with any damage to the tissue.
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