Kaberle was hit in the head by Janssen about two or three seconds after he made a pass in his own end of the ice. The Toronto player then fell to the ice and hit his head against the side boards at the Continental Airlines Arena.
Kaberle lay on the ice for a couple of minutes before he sat up. A neck brace was attached and then he was placed on a stretcher and wheeled off the ice.
A Maple Leafs spokesman said Kaberle was alert after being taken off the ice and that he was being taken to a hospital for observation.
Referees Kelly Sutherland and Brad Watson didn't call a penalty.