Stephen Flock of the University of Arkansas, in the US, and his team has developed a new laser device, which is helping doctors and nurses give injections to patients. This will not only render the process pain-free, but will also reduce the risks associated with discarded needles. This hand-held device removes the upper layer of the skin -- where nerves are located and hence the pain. The battery operated device emits pulses of infrared light to remove the barrier layer in the skin and the liquid drug is allowed to penetrate ( New Scientist , Vol 153, No 2074).
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