BioOptics World (Nov. 18) -- Computerized systems can deliver intravenous medications in precise amounts, but cannot identify or determine concentrations of drugs in the tubing. Now, an optical device can overcome this limitation through real-time characterization of fluid in an IV line. The invention of electrical and computer engineering students led by Brian Cunningham at Illinois, it uses surface-enhanced Raman scattering (SERS) technology, which boosts sensitivity to molecular signals that can identify chemicals.