This diver may well tox again and at NO TIME should they be left alone. Secure the diver in the trough and wait for him to regain consciousness. Notify support diver to inform surface manager. Keep the diver on the lower mix for 15 mins before allowing them to resume deco and watch carefully. Preventing aspiration is of utmost importance.
Diligent attention needs to be given to the divers airway.
A. Follow above steps for non-aspiration episode. If it appears that the diver aspirates proceed as follows. B. Inform support diver that the diver in question has aspirated, they in turn will inform surface manager. As long as the divers airway never relaxed underwater, then there should only be a small amount of water in the lungs. There is nothing that we can do about this underwater.