- operation time [ Time Frame: immediately after the surgery ]
The surgical time is defined as the time from incision to the completion of the skin suture, accurate to minutes
- Intraoperative blood loss [ Time Frame: immediately after the surgery ]
Intraoperative blood loss = total amount of fluid drawn during the operation - intraoperative irrigation volume + intraoperative gauze infiltration blood loss, accurate to ml
- Intraoperative complications [ Time Frame: immediately after the surgery ]
Various complications occurred during the operation were recorded
- Total postoperative blood loss [ Time Frame: Postoperative day 3 ]
Gross linear equation was used to calculate total blood loss and latent blood loss 3 days after surgery. Total blood loss = preoperative blood volume (PBV) × (preoperative hematocrit - postoperative hematocrit). PBV was calculated using Nadler method: PBV=K1× height (m) 3+K2× weight (kg) +K3, where male K1=0.3669, K2=0.03219, K3=0.6041; Female K1=0.3561, K2=0.03308, K3=0.1833. Postoperative total blood loss = total blood loss - intraoperative blood loss;
- Blood transfusion rate [ Time Frame: At discharge ]
The postoperative blood transfusion situation and the amount of blood transfusion were recorded. The blood was transfused mainly with suspended red blood cells, and the amount of a single transfusion was 400ml. The Hb situation was evaluated again by blood routine review on the morning of the second day after transfusion.
Indications for postoperative blood transfusion: No blood transfusion for Hb up to 8g/L or above; Hb up to 7g/L (including) must be transfused; Hb is between 7-8g/L, and blood transfusion should be given when anemia symptoms such as dizziness, weakness, palpitation, etc.
- Postoperative complication [ Time Frame: 3 years postoperatively ]
The postoperative complications such as wound nonunion, wound infection, hematomas and anemia were recorded.
- Rotation Angle of femur prosthesis [ Time Frame: Postoperative day 3 ]
On the horizontal plane of CT scan of the affected knee, the Angle between the line of the posterior condyle of the femoral prosthesis and the line of the transcondyle of the femur was shown. The target Angle was defined as 0° external rotation of the femoral prosthesis, positive Angle during external rotation, negative Angle during internal rotation, acceptable range of ±2°, beyond which was defined as angular deviation
- Visual analogue scale [ Time Frame: Postoperative day 3 ]
The pain of the affected limb was assessed by Visual analogue scale. The highest score is ten and the lowest score is zero. A higher score indicates a higher level of pain.
- Visual analogue scale [ Time Frame: 2 weeks postoperatively ]
The pain of the affected limb was assessed by Visual analogue scale. The highest score is ten and the lowest score is zero. A higher score indicates a higher level of pain.
- Visual analogue scale [ Time Frame: 6 weeks postoperatively ]
The pain of the affected limb was assessed by Visual analogue scale. The highest score is ten and the lowest score is zero. A higher score indicates a higher level of pain.
- Visual analogue scale [ Time Frame: 3 months postoperatively ]
The pain of the affected limb was assessed by Visual analogue scale. The highest score is ten and the lowest score is zero. A higher score indicates a higher level of pain.
- Visual analogue scale [ Time Frame: 6 months postoperatively ]
The pain of the affected limb was assessed by Visual analogue scale. The highest score is ten and the lowest score is zero. A higher score indicates a higher level of pain.
- Visual analogue scale [ Time Frame: 12 months postoperatively ]
The pain of the affected limb was assessed by Visual analogue scale. The highest score is ten and the lowest score is zero. A higher score indicates a higher level of pain.
- Visual analogue scale [ Time Frame: 24 months postoperatively ]
The pain of the affected limb was assessed by Visual analogue scale. The highest score is ten and the lowest score is zero. A higher score indicates a higher level of pain.
- Visual analogue scale [ Time Frame: 36 months postoperatively ]
The pain of the affected limb was assessed by Visual analogue scale. The highest score is ten and the lowest score is zero. A higher score indicates a higher level of pain.
- Range of motion [ Time Frame: 3 days postoperatively ]
The Range of motion of the knee on the operative side of the patient was measured
- Range of motion [ Time Frame: 2 weeks postoperatively ]
The Range of motion of the knee on the operative side of the patient was measured
- Range of motion [ Time Frame: 6 weeks postoperatively ]
The Range of motion of the knee on the operative side of the patient was measured
- Range of motion [ Time Frame: 3 months postoperatively ]
The Range of motion of the knee on the operative side of the patient was measured
- Range of motion [ Time Frame: 6 months postoperatively ]
The Range of motion of the knee on the operative side of the patient was measured
- Range of motion [ Time Frame: 12 months postoperatively ]
The Range of motion of the knee on the operative side of the patient was measured
- Range of motion [ Time Frame: 24 months postoperatively ]
The Range of motion of the knee on the operative side of the patient was measured
- Range of motion [ Time Frame: 36 months postoperatively ]
The Range of motion of the knee on the operative side of the patient was measured
- knee society score [ Time Frame: 6 weeks postoperatively ]
This method is to evaluate the patient's knee joint and its function in two aspects according to the particularity of joint replacement surgery through the evaluator interview and physical examination, that is, to obtain the information of joint anatomy, biomechanics and other aspects, and to understand the patient's functional recovery. Knee joint evaluation is to evaluate the impact of surgery on the joint and the recovery of the joint after surgery, such as: joint pain, joint range of motion, ligament stability, muscle strength, bone alignment, contracture deformity; Functional assessments include activities of daily living, walking ability, going up and down stairs, and the need for AIDS. The evaluation was numerically quantified (see table), and the knee joint score and the functional score were obtained respectively. The higher the value, the better the function.
- knee society score [ Time Frame: 3 months postoperatively ]
This method is to evaluate the patient's knee joint and its function in two aspects according to the particularity of joint replacement surgery through the evaluator interview and physical examination, that is, to obtain the information of joint anatomy, biomechanics and other aspects, and to understand the patient's functional recovery. Knee joint evaluation is to evaluate the impact of surgery on the joint and the recovery of the joint after surgery, such as: joint pain, joint range of motion, ligament stability, muscle strength, bone alignment, contracture deformity; Functional assessments include activities of daily living, walking ability, going up and down stairs, and the need for AIDS. The evaluation was numerically quantified (see table), and the knee joint score and the functional score were obtained respectively. The higher the value, the better the function.
- knee society score [ Time Frame: 6 months postoperatively ]
This method is to evaluate the patient's knee joint and its function in two aspects according to the particularity of joint replacement surgery through the evaluator interview and physical examination, that is, to obtain the information of joint anatomy, biomechanics and other aspects, and to understand the patient's functional recovery. Knee joint evaluation is to evaluate the impact of surgery on the joint and the recovery of the joint after surgery, such as: joint pain, joint range of motion, ligament stability, muscle strength, bone alignment, contracture deformity; Functional assessments include activities of daily living, walking ability, going up and down stairs, and the need for AIDS. The evaluation was numerically quantified (see table), and the knee joint score and the functional score were obtained respectively. The higher the value, the better the function.
- knee society score [ Time Frame: 12 months postoperatively ]
This method is to evaluate the patient's knee joint and its function in two aspects according to the particularity of joint replacement surgery through the evaluator interview and physical examination, that is, to obtain the information of joint anatomy, biomechanics and other aspects, and to understand the patient's functional recovery. Knee joint evaluation is to evaluate the impact of surgery on the joint and the recovery of the joint after surgery, such as: joint pain, joint range of motion, ligament stability, muscle strength, bone alignment, contracture deformity; Functional assessments include activities of daily living, walking ability, going up and down stairs, and the need for AIDS. The evaluation was numerically quantified (see table), and the knee joint score and the functional score were obtained respectively. The higher the value, the better the function.
- knee society score [ Time Frame: 24 months postoperatively ]
This method is to evaluate the patient's knee joint and its function in two aspects according to the particularity of joint replacement surgery through the evaluator interview and physical examination, that is, to obtain the information of joint anatomy, biomechanics and other aspects, and to understand the patient's functional recovery. Knee joint evaluation is to evaluate the impact of surgery on the joint and the recovery of the joint after surgery, such as: joint pain, joint range of motion, ligament stability, muscle strength, bone alignment, contracture deformity; Functional assessments include activities of daily living, walking ability, going up and down stairs, and the need for AIDS. The evaluation was numerically quantified (see table), and the knee joint score and the functional score were obtained respectively. The higher the value, the better the function.
- knee society score [ Time Frame: 36 months postoperatively ]
This method is to evaluate the patient's knee joint and its function in two aspects according to the particularity of joint replacement surgery through the evaluator interview and physical examination, that is, to obtain the information of joint anatomy, biomechanics and other aspects, and to understand the patient's functional recovery. Knee joint evaluation is to evaluate the impact of surgery on the joint and the recovery of the joint after surgery, such as: joint pain, joint range of motion, ligament stability, muscle strength, bone alignment, contracture deformity; Functional assessments include activities of daily living, walking ability, going up and down stairs, and the need for AIDS. The evaluation was numerically quantified (see table), and the knee joint score and the functional score were obtained respectively. The higher the value, the better the function.
- Western Ontario and McMaster Universities Osteoarthritis Index [ Time Frame: 6 weeks postoperatively ]
This score is used to assess the severity of arthritis and its therapeutic effect based on the patient's relevant signs and symptoms. The structure and function of the knee joint were evaluated by pain, stiffness and joint function. A higher score indicates better functionality.
- Western Ontario and McMaster Universities Osteoarthritis Index [ Time Frame: 3 months postoperatively ]
This score is used to assess the severity of arthritis and its therapeutic effect based on the patient's relevant signs and symptoms. The structure and function of the knee joint were evaluated by pain, stiffness and joint function. A higher score indicates better functionality.
- Western Ontario and McMaster Universities Osteoarthritis Index [ Time Frame: 6 months postoperatively ]
This score is used to assess the severity of arthritis and its therapeutic effect based on the patient's relevant signs and symptoms. The structure and function of the knee joint were evaluated by pain, stiffness and joint function. A higher score indicates better functionality.
- Western Ontario and McMaster Universities Osteoarthritis Index [ Time Frame: 12 months postoperatively ]
This score is used to assess the severity of arthritis and its therapeutic effect based on the patient's relevant signs and symptoms. The structure and function of the knee joint were evaluated by pain, stiffness and joint function. A higher score indicates better functionality.
- Western Ontario and McMaster Universities Osteoarthritis Index [ Time Frame: 24 months postoperatively ]
This score is used to assess the severity of arthritis and its therapeutic effect based on the patient's relevant signs and symptoms. The structure and function of the knee joint were evaluated by pain, stiffness and joint function. A higher score indicates better functionality.
- Western Ontario and McMaster Universities Osteoarthritis Index [ Time Frame: 36 months postoperatively ]
This score is used to assess the severity of arthritis and its therapeutic effect based on the patient's relevant signs and symptoms. The structure and function of the knee joint were evaluated by pain, stiffness and joint function. A higher score indicates better functionality.
- Patient satisfaction [ Time Frame: 6 months postoperatively ]
At follow-up, patients' satisfaction scores were recorded (using 5-Likert scale). The higher the score, the higher the satisfaction
- Patient satisfaction [ Time Frame: 12 months postoperatively ]
At follow-up, patients' satisfaction scores were recorded (using 5-Likert scale). The higher the score, the higher the satisfaction
- Patient satisfaction [ Time Frame: 24 months postoperatively ]
At follow-up, patients' satisfaction scores were recorded (using 5-Likert scale). The higher the score, the higher the satisfaction
- Patient satisfaction [ Time Frame: 36 months postoperatively ]
At follow-up, patients' satisfaction scores were recorded (using 5-Likert scale). The higher the score, the higher the satisfaction
- Length of stay [ Time Frame: an average of 3 days postoperatively ]
The number of days a patient stays in hospital from admission to discharge
- Medical expenses [ Time Frame: an average of 3 days postoperatively ]
The total cost of a patient from admission to discharge