The Irishman told the CET: "I am out for the rest of the season so I came back to Coventry this week to get treatment. "I started the season well up there and was playing up front which is where I have always said I would like to play, but I got my studs caught in the turf in a game and felt something pop in my right knee.
"That was back in October and I had an operation where they cleaned the knee out and, in the meantime, Livingston extended my loan deal for the rest of the season because they were happy with my form and thought I would be fit again soon.
"But I was still having trouble with the knee and they put a camera in to have another look five weeks ago, and hopefully they have got to the bottom of the problem this time. "I am on crutches at the moment and decided that I might as well come back to Coventry and get treatment until the summer."