Chronic sdh removal and complications.

My mother who had history of liver cirrhosis and 2episodes of hepatic encephalopathy was diagnosed to have sdh(left frontal) following a fall from cot..burrhole craniectomy (stp)was done as per advice..2 days prior to surgery her pt- 17 s..inr 1.32 ....bt-2mts..ct-4mts....she was given vit.k for two days and was taken for surgery...in the immediate post op she had intracerbral(left parie )hemorrhage for which they did open craniotomy.. after this we were informed that her coagulation is not normal...and altigether she was given 13 units of ffp and 4 pints of prbc in the next five days..isnt it mandatory to check pt inr immediately before surgery?was it possible to give ffp prior to surgery to correct abnormal values..and she was given normal saline as iv fluid..is this contraindicated in cirrhosis.her blood ammonia kevel was first checked on fifth day aftr surgery and it was 264.. is 5 days continous midazolam atracurium infusion necessary after open craniotomy in a cirrhotic patient?