Health care market research publisher Kalorama Information reported that, driven by innovative devices such as capsule endoscopes, the gastrointestinal device market grew to $14.6 billion in 2011. Capsule endoscopy has been one of the fastest areas of revenue increase for manufacturers, charting 12.9 percent growth annually since 2007, according to the company, which is based in Rockville, Md. The findings are based on Kalorama’s recent study The World Market for Gastrointestinal Devices. The publisher is now seeing the impact of second-generation products and new competitors. Capsule endoscopy technology is essentially a miniature video camera that is swallowed and that delivers images of the inside of the gastrointestinal tract for diagnostic purposes.