"We've got to think about the longevity as well, who's going to fit in personality-wise".
United's list of absentees have shortened ahead of the match, but Lukaku may well be missing after aggravating a foot complaint in last weekend's 2-0 loss at Arsenal.
On Friday Solskjaer was asked about links to Bale and while he refused to be drawn on the winger specifically, United's caretaker manager insisted that the club will consider any player who will add something new to their squad.
Solskjaer's trip to the Camp Nou will stir happy memories for the former United striker, who scored the dramatic stoppage-time victor in the club's famous Champions League final triumph against Bayern Munich in 1999.
"To win trophies you've got to win at least one or two really tough games. So there's so many things that we need to think about".
"But they've turned it around completely now, they're a different club at the moment".
However, Manchester United have made excellent progress in the cup competitions after the Red Devils were 3-1 winners against Paris Saint-Germain at Parc des Princes last week.
Goalkeeper: David De Gea could be set for a rest as Sergio Romero has played in each of the last three games in the FA Cup this season and Solskjaer has hinted he's ready to stick with the Argentinean worldwide tomorrow. "We had the final against them in 2009 and 2011 (both of which Barca won) and the semi-final in 2008 when Scholesy (Paul Scholes) scored", Solskjaer said. So yes, we can go all the way but you've got to be lucky and good along the way.
"He's coming back on Sunday", Solskjaer said of Sanchez.
"So yes, we can go all the way but you've got to be lucky and good along the way".
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