Having missed out on deadline-day moves for Peter Crouch and Peter Odemwingie, much of the west Londoners' survival hopes are pinned on the France international.
The Rs missed the former Marseille forward's firepower last weekend as they were held to a goalless draw by Norwich at Loftus Road, leaving the bottom-placed side six points adrift of safety.
It emerged that Remy suffered a groin injury in the build-up to the Canaries' visit and, after reports he could miss two months, it came to light he only suffered a strain.
The 26-year-old could therefore return at Swansea, but Redknapp will not use him if there is the slightest chance of the injury worsening.
"I am not sure about Loic Remy," he said. "We'll have a look at him. It is sort of touch and go.
"He did his groin as it was muddy out there. He went to play a ball and stretched and felt his groin tweak. We weren't sure how bad it was but it is not that bad.
"The doctor said all along he felt it was only a minor injury there so he has got a chance, but if he is not sure he is okay I wouldn't take a chance.
"With injuries like that, you can go and lose somebody for five and six weeks if they tear it so unless he feels very confident about it I wouldn't risk him.
"I don't think I can afford to do that because he could put himself out for quite a while."
- Sports & Recreation
- Peter Odemwingie
- Peter Crouch