Yes one lobe & risky
Live lung donation has not achieved much popularity as only one lobe of five is permissable.
Thus two donors give one lobe each to the recepient.
Early in 2007 live donor, recepient in isreal was not encouraging.
However to save a dying child would be ethical.
Few centers offer this and rarely done.
Lobe translant has smaller pedicle and bood vessels and bronchi thus difficult.