A recent report from Forrester Research indicates that the use of social networking websites among people aged 35 to 54 increased by 60 percent in the last year. Twitter and Facebook have become popular among federal centers like the Centers for Disease Control and Prevention (@CDCemergency), hospitals like the University of Maryland Medical System (University of Maryland Medical Center – @UMMC), and even individual doctors.
Through Twitter, doctors are able to post updates about the events of their day, connect with other healthcare workers, communicate with and inform patients, and even document surgeries and procedures. Results of a recent study by the American Telemedicine Association indicate that doctors and patients have seen beneficial outcomes from using Twitter to connect.
Article
iCons in Medicine, 22 February 2010

