tokens: The dynamics of N - interaction and N - retention during 3 hr CPB was quantified with autologous In - 111 labeled neutrophils ( INN ) in 4 groups of 20 Yorkshire pigs ( 28 - 35 kg , 5 sham ; 5 CPB , 1 hr ; 5 CPB , 3 hr and 5 CPB with heparinized circuit , 3 hr ) ; anesthetized pigs were injected with INN ( 500 - 650 microCi ) , 30 min before CPB and heparinized , and underwent CPB with a roller pump , a hollow fiber OX ( Bentley CM 50 , 5 . 0 m2 ) and AF ( Bentley AF 025 , 0 . 25 m2 ) at 2 . 5 - 3 . 6 l / min for 3 hr .