On a scale of 1 to 10 , with 10 being very easy to use and 1 being very difficult , the Fuji-Phycon was judged to be easier to use ( median 10 seconds ) compared with the Rusch ( median 3 , P = 0.0186 ) and the Mallinckrodt ( median 4 seconds , P = 0.0123 ) .