Vokoun had been hospitalized since Saturday when he had a procedure performed to dissolve a blood clot in his pelvis.
There is no timetable for him to return to the team.
Vokoun went 13-4-0 with a 2.45 goals-against average in 20 regular season games for the Penguins last season, and went 6-5 with a 2.01 GAA in 11 Stanley Cup Playoff games. He replaced Marc-Andre Fleury as starter for Game 5 of the team's first-round series against the New York Islanders, and backstopped the Penguins to the Eastern Conference Final.
It's about enjoying the moment. It's pretty cool to get that many people together and that excited about hockey to the point they really want you to mess up. They've got a ton of red jerseys and you have to sit back and appreciate people love hockey that much and you are the one out there who gets to play the game. Just try and stick with that respect for the game and also the mentality that for me it's just about entering the fight and seeing how long I can stay in it.
— Canucks goaltender Ryan Miller on what he expects from the fans in Calgary for Game 6