The aim of this study was to observe the effects of posterior femoral cutaneous nerve block combined with sciatic and saphenous nerve block compared with sciatic and saphenous nerve block alone on postoperative posterior side of the knee (popliteal fossa) pain and sleep quality in patients with TKA, and to further alleviate postoperative posterior side of the knee pain in patients with TKA and improve the quality of postoperative sleep.
Patients who are >45 years of age; intended to undergo elective first TKA under general anesthesia
ASA grade II-III.
Agreed to participate in this study and signed the informed consent form.
BMI less than 28Kg/m2.
Patients who refuse to participate in the trial
Preoperative inability to communicate due to speech and hearing impairment, etc.
History of allergy to local anesthetics or opioids
Contraindications to nerve block operation.