Elisangela Borborema Rosa was rushed to the hospital and underwent emergency surgery after Monday's incident in the coastal city of Arraial do Cabo.
The statement quotes neurosurgeon Allan da Costa as saying that the harpoon came within 1 centimeter (less than half an inch) of killing the woman. He said he expects a full recovery.
A police officer in Arrial do Cabo said by telephone that officials are looking into the case.
"Everything indicates it was an accident, but we are investigating. We don't think the husband tried to kill her," said the officer, who cited department policy in declining to let her name be used.
"But once she fully recovers we will be able to question her and get a clearer picture of what happened."
More Nation & World Headlines
NASA opens up patents to inventors, for free The kids are all right with breaking up in person New push could revive Ex-Im Bank Ben Carson leads Clinton in key states Putin spends birthday playing hockey with NHL stars Russia fires missiles as Syrian troops launch ground push Scientists win Nobel chemistry award for work on DNA repair Nuclear smugglers sought terrorist buyers
Our new comment system is not supported in IE 7. Please upgrade your browser here.