Qufulka fiilada ee la hagaajin karo dhererka qufulka fiilada waxaa lagu hagaajin karaa iyadoo loo eegayo jawiga garoonka si loo go'doomiyo muddada gaaban inta lagu jiro dayactirka iyo dayactirka ama quful aan xadidneyn ee muddada dheer ee valves iyo wareegyada wareegga.Inta lagu jiro dayactirka iyo dayactirka, ugu badnaan afar quful ayaa la isticmaali karaa, mid walbana waxaa leh shaqaale dayactir oo kala duwan.Kaliya marka ay dhammaan shaqaaluhu dhameeyaan shaqadooda oo ay iska saaraan qufulkooda gaarka ah ayaa laga saari karaa qufullada fiilada oo dib loo soo celin karaa hawlgalka waalka (ama furaha wareegga wareegga)