NEW : Her lungs had been deteriorating rapidly over the past few months -- much faster than anyone in her family expected . Sarah family says there were no issues during her lung transplant . NEW : Surgery took about six hours , Sarah Murnaghan 's did 'extremely well , '' family spokesman says . Her family fought to change the policy for children 's lung transplants . Organization overseeing transplants ruled under 12 to make children Monday eligible for priority on adult lists .
NEW : Sarah family says there were no issues during her lung transplant . NEW : Surgery took about six hours , Sarah Murnaghan 's did 'extremely well , '' family spokesman says . Her family fought to change the policy for children 's lung transplants . Organization overseeing transplants ruled under 12 to make children Monday eligible for priority on adult lists .