The study is conducted in tertiary university hospital as a referral hospital for joint arthroplasty , the patients was informed about the study and consent was taken , the same operator , same theater and the same prosthesis company as well as the same radiologist during the study period.~the patient randomly assigned to either group A (Tourniquet release before closure of the wound and hemostasis ensured ) , or a group B ( Tourniquet release after wound closure )~post operative Hb drop was studied between the groups , and each patient underwent ultrasound measurement of the intraarticular hematoma . The wound complication between the groups was also studied .
The study , observe the effect of releasing the Tourniquet in total knee replacement surgery before closure in comparison with releasing it after wound closure~The effect was assessed by Hb drop post operative and Hematoma formation ( measured by ultrasound ) as well as the wound complication