Papiss Cisse underwent surgery during a seven-game ban in March
The interim head coach feared he'd be without his 11-goal top scorer for the rest of the season when the Senegal international underwent knee surgery during a seven-game ban in March.
But the 29-year-old made his comeback well ahead of expectations to play the final 20 minutes of last Saturday's 1-1 draw with West Brom, as Newcastle halted a damaging eight-game losing streak.
Carver is tempted to start the former Frieburg striker in Saturday's trip to already relegated QPR, where victory allied to Hull City failing to beat Tottenham at White Hart Lane will guarantee his side's top flight status for another season.
Newcastle haven't scored an away goal since Cisse's effort in the 1-1 draw at Crystal Palace in mid-February, and Carver said: "Papiss could be huge for us in these last two games.
"What we have to bear in mind is that he was supposed to be out for between 12 to 14 weeks, but because of the personality he is, he got back quicker than we thought.
"He didn't have any under-21 football, or a behind closed doors game to help prepare him for his Premier League comeback, and I thought he did well against West Brom after eight weeks out. He's definitely going to be involved against QPR, and he's definitely in a better place after a week's training."
Newcastle are two points and a place above the drop zone going into their final two games. They are without an away win since the end of January, and Carver warned his side to expect a reaction from their hosts, whose relegation fate was sealed with a humiliating 6-0 defeat at Manchester City.
I m the best coach in the Premier League - Carver [AMBIENT]
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In an ironic twist, two years ago Newcastle gained the points they needed to clinch top flight safety with a win at already relegated Rangers, whose current side will have in their ranks former Newcastle midfielder Joey Barton.
Carver added: "If I was QPR manager Chris Ramsey and I'd just lost 6-0 at Manchester City, I'd be wanting my side to put on a show for the fans in response to that. This is their last game in the Premier League at home for at least 12 months, there's one or two characters in their team with a point to prove and they'll want to go out on a high.
"That will drive them forward, and of course, they've got Joey Barton who won't want to do us any favours. I've seen him before after a heavy defeat and he'll want to respond in the right way."
Forwards Siem de Jong and Adam Armstrong miss out through injury at Loftus Road, but French midfielder Gabriel Obertan returns to the squad as Newcastle look to stretch a 20-year unbeaten record against the London club.