Stuart/By S. Bradley

BOSTON — It turns out Mark Stuart suffered his hand injury while blocking a shot — but against Tampa Bay last Thursday, not Tuesday night against Buffalo.

The Boston defenseman was declared out four to six weeks Wednesday with a broken left hand and dislocated ring finger. At that time, the Bruins did not provide any other details about the injury. Today after his team’s morning skate in preparation for tonight’s game with the New York Islanders, Stuart clarified that it was the shot of a Lightning player from the point that caused the injury last week. Stuart then toughed it out against Toronto Saturday and tried to give it a go against Buffalo.

“It was sore. We took X-rays after Thursday’s game and they were negative,” said Stuart. “So we just decided to see how it felt and look at it in a couple days. So it was sore. I mean, we taped it up for Toronto [Saturday]. It wasn’t feeling bad. So we actually planned on getting X-rays again after the game Tuesday. But I think my third shift, all I did was make a pass and the thing just caved in. It was just hanging on by a thin thread I think.”

By caved in, Stuart said “it just broke the rest of the way, and my finger just dislocated at the same time. So it was ready to go, I think, at any minute.”

Stuart hopes he’ll be able to ride the bike and maybe even skate during his absence. Boston was 15-7-4 last season without Stuart, who missed time with a finger injury on his right hand and a broken sternum.