Rotational Thromboelstometry (ROTEM) change_colloid_total Hip Replacement Arthroplasty

Hemostatic Changes After Colloid Fluid Administration During Total Hip Replacement Arthroplasty

The investigators administered different kinds of colloids before transfusion of red blood cell to patient undergoing total hip replacement arthroplasty. The investigators will compare the differences of changes in rotational thromboelastometry (ROTEM) data among them.

Inclusion Criteria:

• Patients diagnosed as avascular necrosis of hip and undergoing total hip replacement arthroplasty

Exclusion Criteria:

• hematologic disease
• anticoagulant medication
• preoperative hemoglobin < 10 g/dl
• renal disease
• pulmonary disease (pulmonary edema, effusion)
• cardiovascular disease (coronary heart disease, congestive heart failure)