Arun Kumar said that before his identity was disclosed by the police, he was believed to be a victim.
"With a splinter lodged in his brain, the chances of his recovery were very poor. He was unconscious and not responding to medication after being admitted to hospital," Kumar said.
Six people were killed and 83 injured in seven bomb blasts in Patna.
Six of the seven blasts took place Sunday at Patna's Gandhi Maidan before Bharatiya Janata Party's prime ministerial candidate Narendra Modi was to address a rally. The seventh explosion was at the railway station.
