Sharon Osbourne said her husband stopped breathing and his heart stopped beating for nearly two minutes after the accident at their Buckinghamshire mansion on Monday.

The 51-year-old told the Daily Mirror that her husband fell off his quad bike as he drove over some uneven ground and the bike then landed on top of him.

He was saved by the actions of his security guard who happened to be with him at the time.

"He had stopped breathing and the guard spotted it immediately," she told the newspaper. "He resuscitated him and got him breathing and his pulse going again. We are so, so grateful to him."

Osbourne suffered a fractured vertebra, eight fractured ribs and a broken collarbone in the accident.

Sharon Osbourne said doctors had still not been able to determine whether he had suffered any lasting damage.

"The doctors are hoping there hasn't been any lasting damage but until Ozzy can actually come round and get off the ventilator and then they will know," she said.

She also criticised comments by Pop Idol judge Simon Cowell, who suggested the accident would help Osbourne's record sales.

Cowell later apologised: "I had no idea that Ozzy was far more seriously ill. I apologise unreservedly for the way it has been put across."

i hope ozzy gets better soon the man is a legend.