Pre-surgical preparation Medical preparation: Once you have decided to have surgery, you will enter into a pre-surgical preparation procedure, the purpose of which is to ask your surgeon to give you a thorough pre-surgical examination of your entire body to see if there are any factors in your body that would prevent surgery and post-surgical recovery. These include: examinations; skin preparation; blood transfusions; medications; lower extremity examinations; weight loss; dental examinations; treatment of chronic lesions; urinary tract examinations; preoperative suspension of smoking; and preoperative exercises for crutch use. Perioperative period: includes pre-surgery after hospitalization, day of surgery, and early post-surgery. Pre-surgery: You will usually need to be admitted 2-3 days before surgery. After hospitalization, the attending surgeon will talk to you about prosthesis selection, post-surgical precautions, etc. If you have other co-morbidities such as diabetes, hypertension, etc., the doctor in charge will invite a specialist from the relevant department to see you; a member of the anesthesia team will examine you once. The day before surgery: You will need to take a hot shower; protect the skin in the area of surgery from injury; stop eating after 10:00 p.m. and stop drinking 6 hours before surgery; sign a consent form for surgery by yourself or by a member of your immediate family; practice deep breathing, quadriceps contraction, and ankle pump exercises; practice crutches; and practice urination and defecation in bed. Surgical period (day of surgery): You are usually taken by the operating room nurse on a trolley to the operating room preparation room early in the morning around 8:00 a.m. on the day of surgery, where you change into your surgical gown, place your personal belongings, and your relatives can accompany you to the door of the operating room. Preparation: In the operating room, the operating room nurse will place the necessary devices to check your blood pressure, pulse, and breathing; establish intravenous access; and a tourniquet will be placed on your thigh to control bleeding during surgery. Procedure: After sterilization and sterile sheeting, the orthopedic surgeon will remove the damaged bone and cartilage through an incision in the front of the knee and then implant a new metal and plastic joint to maintain proper alignment and function of your knee. The procedure takes about 2 hours from the time the skin is cut to the time the incision is closed. After surgery, you will either be moved to the wake-up room for 1-2 hours where you will be monitored by the anesthesia team and then returned to your room, or you will return to your room under the supervision of the anesthesia team. Early post-operative period (within three days after surgery): 1. The patient may be placed in the awakening room on the day of surgery or may remain in the same room, depending on the patient’s condition, usually with some instruments to test the function of your vital organs. 2.There is a thick dressing (usually a bandage and cotton pad) on the knee. 3. There is a surgical incision drainage tube that will be removed about 1-2 days after surgery. 4.There is an intravenous infusion tube, which is usually needed for 3-5 days, mainly for the input of antibiotics, or blood transfusion if necessary. 5.The catheter will be removed as early as possible; if you urinate or defecate in bed, be careful not to stain the dressing of the incision. 6.If the pain is severe, ask the surgeon to give appropriate painkillers; if a pain pump is placed, please use it as instructed by the anesthesiologist. Remember not to endure the pain, the doctor has a solution. 7. Follow the exercises taught by the surgeon before the surgery and start functional exercises as early as possible. Hospitalization period: about two weeks