This study was planned to investigate the physiopathology of bradycardia and hypotension that occur in some patients with total knee arthroplasty (TKA) between the ages of 65 and 90 years when the tourniquet, which is routinely used in patients with total knee arthroplasty (TKA), is opened at the end of the operation and to determine the physiopathology of these effects of the tourniquet and how these effects can be prevented.
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Activated Partial Thromboplastin Time(APTT)
Timeframe: Time 1:Preoperative 24th hour, Time 2: Approximately 10-15 minutes after placing cement during surgery, Time 3: Approximately 10-15 minutes after opening the intraoperative leg tourniquet, Time 4: Postoperative 12th hour, Time 5: Postoperative 24th hour
Prothrombin Time (PT)
Timeframe: Time 1:Preoperative 24th hour, Time 2: Approximately 10-15 minutes after placing cement during surgery, Time 3: Approximately 10-15 minutes after opening the intraoperative leg tourniquet, Time 4: Postoperative 12th hour, Time 5: Postoperative 24th hour
International Normalised Ratio (INR)
Timeframe: Time 1:Preoperative 24th hour, Time 2: Approximately 10-15 minutes after placing cement during surgery, Time 3: Approximately 10-15 minutes after opening the intraoperative leg tourniquet, Time 4: Postoperative 12th hour, Time 5: Postoperative 24th hour
D-DÄ°MER
Timeframe: Time 1:Preoperative 24th hour, Time 2: Approximately 10-15 minutes after placing cement during surgery, Time 3: Approximately 10-15 minutes after opening the intraoperative leg tourniquet, Time 4: Postoperative 12th hour, Time 5: Postoperative 24th hour