The 55-year-old rocker was rushed into emergency surgery to address the eight ribs, neck vertebra and collarbone broken in the crash. Osbourne's collarbone was lifted off of an artery to alleviate pressure thought to be constricting blood flow to his arm.
Doctors also staunched some bleeding in the singer's lungs, his publicist Cindy Guagenti said. His injuries are not considered life threatening; however, doctors said Tuesday the singer will remain on a ventilator for one more day.
"We have begun, slowly begun, the process of getting him off the ventilator," Dick Jack, medical director of the undisclosed hospital where Osbourne is being treated, told reporters. "His progress is steady. He is stable, he is comfortable and satisfactory but it's going to be slow and I don't expect any major changes, certainly for 24 hours."
The rocker and reality show star was in England promoting the softened version of Black Sabbath's "Changes" he duets on with daughter Kelly. Wife Sharon flew in from the U.S. to be at his side while he recovers.
Osbourne, the former frontman for 1970's heavy metal band Black Sabbath and solo star in the 1980s, has become a star on television as well over the past few years with his wildly successful MTV reality show The Osbournes, which also stars Sharon and their children Jack and Kelly.
Just days ago, Osbourne told the Los Angeles Times that his sometimes incoherent and confused manner on the show was due not to his previous abuse of illegal drugs, but to the over prescription of drugs by a Beverly Hills doctor who is currently under investigation for overprescribing medication to eight other patients.