Blues boss Paul Lambert says “one or two" players could be allowed to move on now he has made additions to his squad.
Lambert has brought in four players so far during the January window with free agent James Collins on the verge of becoming the fifth.
He says that those signings will allow him to let players who will now be more on the fringes move on, while left-back Jonas Knudsen is already expected to depart.
"One or two probably will go out but I don’t want people just to go out and not play any football or the club not get some money back for it or part of their salary,” he said. "We get that done to us, so we do the exact same to other teams.”
Lambert says he has no plans to cut short the loans of Trevoh Chalobah or Matthew Pennington, his January business having taken the total of loanees to five, the maximum permitted in a matchday squad.
"It doesn’t make sense sending them back, they’ve been big players for us and we’re up to our full quota,” he said.
But he doesn’t rule out more loanees coming in: "Only if it really helps. This is where it falls down, the structure of the squad. If five loan lads come in, guaranteed, five will go back and then you go back down the same route, same route, same route, same old, same old, same old. You shouldn’t be in that position.
"Number one, you shouldn’t bring in eight or nine players in the summer window, regardless of what level you’re at, whether you’re at Premier League level, Championship level, League One, League Two.
"It doesn’t make sense bringing in eight or nine guys, you have to get them to gel first and foremost. It doesn’t work, that is a really difficult thing for any manager to do that.
"Ideally, you’d maybe have two or three guys come in in the summer, it’s enough. And then you build it.But you can’t have this turnaround, this is not normal.”