Emelec officials said that Quinonez was knocked to the ground by the force of the impact, suffered convulsions and nearly lost consciousness.
He spent the night in hospital complaining of dizziness and was released on Monday.
"I want to apologise sincerely to Pedro Quinonez, his family, the supporters, everyone," Banguera told a news conference late on Monday. "I was a bad loser.
"I am aware if there is a sanction, I will have to face it."
The two players had also been involved in an angry exchange during the Shipyard Derby which Emelec won 2-0.
(Writing by Brian Homewood in Berne; Editing by John O'Brien)
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