Injured Melbourne star Christian Petracca has opened up on his "traumatic" recovery from a season-ending blow to the torso that left him with four fractured ribs, a punctured lung and a lacerated spleen.

A knee from Collingwood defender Darcy Moore in last week's King's Birthday loss to the Magpie left Petracca in agony on the MCG surface early into the contest.

Petracca was taken to hospital before the game had concluded, with the midfielder held in ICU for five days due to the severity of the injury.

The club confirmed Petracca would not return to the field this year, with the 28-year-old now out of hospital and back home bed-ridden.

"I've been better. [The recovery] has been pretty tough to be honest," the Norm Smith Medal winner told Nova 100 on Monday.

"It's been pretty traumatic. I spent four-five days in the ICU, the last couple of days I was just in the ward and now I'm out of hospital and home.

"It's been pretty full on. I don't wish this on my worst enemy. It's been tough."

Stunningly, Petracca returned to the field following the injury, playing a large portion of the second quarter before eventually being subbed out of the game and placed in an ambulance.

The four-time All-Australian admitted he wouldn't have stepped back into the game had he known the full extent of his ailment, noting he just wanted to compete and help the Demons remain in the match.

Petracca said he was in severe pain when he did return, believing he had only suffered cracked ribs and was fuelled by adrenaline at the time.

"I didn't know the severity of it until two in the morning when I was gassed up with my eyes open and they were doing surgery. I just thought it was a couple of cracked ribs, which obviously is serious, but I thought I could go back and play," he added.

"It was pretty full on. I don't think people understand you just want to go out there and compete. As an athlete and competitor, you just want to do everything you can.

"I was in a similar situation a couple of years ago when I fractured my leg in the first quarter and I went out and played the next three quarters.

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"Had I known now of the severity of [my latest injury] I obviously wouldn't have gone back out there. At the time I didn't know what the injury was, we thought it was a couple of cracked ribs.

"I wanted to go out there and play. In the second quarter I was under severe pain."

Petracca confirmed Moore has reached out on several occasions since the incident, with the Demons star saying he saw no malice in the contest whatsoever.

The midfield bull can't run or do gym exercises for seven weeks and is unable to take part in contact training for three months.

The injury is a significant hit to Melbourne's premiership prospects, with the Demons' loss to Collingwood and the club's subsequent bye seeing them slip to 11th on the ladder.

A win this Saturday against North Melbourne could see the Demons climb as high as sixth on the ladder.