London: A Japanese scientist has developed anew injection system that can deliver drug into human skinwithout causing any pain. The system -- a round vaccine "chip" measuring 1.5 cm indiameter that contains as many as 300 micro needles -- injectsdrug into the body without breaking the dermis layer of skin. The needles are made up of a water-soluble polymer thatdissolves when pressed into the epidermis, the very outerlayer of skin, releasing the vaccine to be absorbed into thecirculatory system, the Telegraph reported. Each of the dozens of needles is a 0.5 mm long and 0.3 mmwide at the base and tests show that the efficiency of thevaccine is not adversely affected by the method of delivery. "The needle dissolves and administers the vaccine, afterpenetrating just 0.5 millimetres in the skin. So, the patientfeels no discomfort and there is no bleeding," said KanjiTakada, a professor of pharmacokinetics at KyotoPharmaceutical University, who developed it. "The patch can be used to deliver any type of vaccine andpeople are not frightened of having the injection because theyfeel nothing at all," said Takada, who took six years to develop the new drug delivery system.
The new injection system could be made available for usein hospitals in Japan within two years. PTI
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