passages.id: split_6_test_227_passage
passages.type: progene_text
passages.text: Sprague - Dawley rats , weighing 220 - 250 g , were divided into three groups : group 1 sham - operated group ( no IR injury , n = 8 ) , group 2 ischemic control group ( control , Ringer 's lactate infused , n = 8 ) , group 3 Antithrombin III treated group ( 250 U / kg before ischemia , n = 8 ) .