#9 The Hypospray
The promise of painless needle injections lies with SonoPrep. According to the company's Web site, the SonoPrep device is the brainchild of Robert Langer, an MIT-trained chemical engineer who hit upon a novel way to penetrate the skin's outermost layer. Patients who get sonicated hear a soda-pop fizz and feel a slight tingling, but that's it. In 15 seconds, the skin is properly perforated and ready to soak up meds.