investigators aimed to compare the effects of repeated bolus doses with femoral nerve catheter and adductor channel catheter on postoperative pain and muscle strength in patients undergoing total knee revision under spinal anesthesia in this study. Materials and Methods: The patient will be informed about the procedure to be performed before the operation and written approval will be given. The patient will be premeditated with 2mg midazolam and sedayon and monitored according to routine operating room procedures and total knee prosthesis operation under spinal anesthesia. Patients will then be transferred to the collection room and ECG, NIBP and SpO2 monitoring and appropriate sterilization will be performed, and a grubby femoral nerve catheter with USG will be attached to the other group adductor channel catheter. A 20cc 0.25% marcain will be administered in 6 hours, with the first dose catheter placed in both groups.