At least one hockey player has been caught in pre-Olympic drug testing.

Vancouver Canucks defenceman Mattias Ohlund tested positive for a banned substance by the International Olympic Committee.

The 25-year-old rearguard, who is scheduled to play for Team Sweden in the Salt Lake Games, took the drug Diamox, which contained the banned drug acetazolamide by his doctor after he underwent eye surgery in early December.

It is not a performing-enhancing substance. The matter will be reviewed by the IOC, and Ohlund is not required to attend.

"I'm hopeful everything will be okay and that I'll be able to play in the Olympics,' Ohlund said in a statement. "I've been told I shouldn't really comment any further until the matter is cleared up."

Ohlund submitted his sample for Olympic doping control eight days after his surgery. He did not inform World Anti-Doping Agency officials of the medication he was taking.

The NHLPA said that Ohlund was unaware that the medication he was taking contained a banned substance, and Swedish Ice Hockey president Rickard Fagerlund said that the player should still participate in the Games.

"This was doping by mistake," Fagerlund said in a statement. "It won't jeopardize his Olympic participation."

"Mattias Ohlund can sleep well," said Anders Hedberg, general manager of the Swedish team. "He hasn't done anything intentionally."

Canucks president and general manager Brian Burke is also confident that the situation will be solved in the near future.

"Mattias was subject to random testing as is every participant in the upcoming Winter Olympic Games in Salt Lake City," said Burke in a release. "As an organization, we have nothing but full support for Mattias Ohlund."

Ohlund originally injured his right eye during a 1999-2000 pre-season game in Ottawa when he was struck by a deflected puck. The most recent surgery, his fourth, was performed to remove scar tissue.