Deila, though, is still hopeful an agreement can be reached with the player he values as one of the squad’s leaders, but admits now needs an uninterrupted run in the team.
He said: “I hope he stays injury free for a period because he hasn’t played consistently in a long time.
“During my time here, he’s had very few games. We need consistency of play, but we know Charlie is a very good footballer. He is a character and a person I really like.
“But without having him on the pitch, it’s difficult. Charlie has experience and is a leader-type. A contract offer could happen.
“Charlie is an important player and he is a professional who brings a lot of positive energy to the dressing room.
“But, again, without having him on the pitch, it’s more difficult. We want him to stay for a longer while without any setbacks.”
Mulgrew and Kris Commons are available for tomorrow’s home clash against Ross County. Commons has now recovered from illness.
The Hoops gaffer added: “The loan is 18 months and he needs time to adapt to how we train and play.
“Patrick had injuries before he arrived, so his fitness needs to be better. We’ve spoken with him a lot and he has skills which means he can do something at this level.
“He scored a very good goal and has touch and vision. We have to use this first half of the year to get him adapted, but I’m not saying he can’t be involved.”
