Pittsburgh Penguins goaltender Tomas Vokoun is out indefinitely after undergoing a procedure to remove a blood clot on Saturday.

Vokoun was practicing with the Penguins at CONSOL Energy Center on Saturday when he noticed swelling on his thigh and left the ice. He was immediately taken to the emergency room where he was diagnosed with a blood clot on his pelvis.

"The most important thing right now is Tomas' health and well-being" GM Ray Shero said. "The clot was dissolved by the procedure and the doctors tell us that he will remain in the hospital for several days. We will continue to monitor his progress after that."

Last season was the veteran Vokoun's first in Pittsburgh. He served as the backup -- albeit a busy backup -- to Marc-Andre Fleury appearing in 20 regular season games. But it was in the postseason when Fleury once again began to struggle mightily that Vokoun took over in net and played excellent hockey to lead the Penguins to the Eastern Conference finals before they were swept by Boston.