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.
There's not much to say. We played like [garbage]. I think every guy in the room should be completely embarrassed about how they played tonight. Every single person. To start a road trip, one of the biggest road trips and have a division rival chasing you down and have a ton on the line, it's ridiculous how we played tonight.
— Anaheim forward Andrew Cogliano after the Ducks' 7-2 loss to the Flames on Wednesday