Allen has 4 goals and 12 points in 53 games for the Panthers this season. Carolina had a spot on its blue line open after trading defenseman Ian White to San Jose for a second-round pick earlier this month. Allen has one year left on his contract that carries a $2.9 million cap hit.
"Bryan is a good addition to our defense," said Hurricanes General Manager Jim Rutherford. "He has great character and experience and will add size and grit to our team."
Samsonov has 10 goals and 26 points in 58 games for the Hurricanes this season, and can become an unrestricted free agent after this season.