THE SYDNEY Swans have been cleared of any wrongdoing after an investigation into their concussion management of midfielder Josh Kennedy in last week's qualifying final against Greater Western Sydney.

Kennedy suffered a knock to the head in the clash and was removed from the ground for testing before returning in the second quarter and playing out the match.

The midfielder was wobbly on his feet after being collected high in a Steve Johnson bump, prompting concerns that he may not be able to play out the match.

The AFL investigated the circumstances around his testing and eventual return to the field and found the Swans had followed the League's concussion protocols.

After being taken from the ground, Kennedy underwent a head injury assessment, including a SCAT3 test.

He spent the appropriate amount of time out of the game, the League said, eventually passing the SCAT3 test and a subsequent concussion test post-game.

The AFL said he had since shown no effects from the knock since match-day.

The Swans had difficulty accessing all vision of the incident from the bench and football operations manager Mark Evans said the AFL was intending to expand the Hawkeye interchange bench medical system to all AFL venues next season.

The technology, which has been trialled at the MCG and Etihad Stadium, assists clubs when assessing on-field vision in immediately examining a player.