[Effect of total knee arthroplasty under computer navigation on intraoperative blood loss and joint function...

To analyze the effect of computer navigation assisted total knee arthroplasty on intraoperative hemorrhage and postoperative joint function recovery in patients with knee osteoarthritis.

From February 2015 to December 2017, 65 patients with knee osteoarthritis treated by traditional total knee arthroplasty were retrospectively analyzed as the control group and 65 patients with knee osteoarthritis treated by total knee arthroplasty under computer navigation as the experimental group. Before operation, all patients showed red swelling pain of knee, pain of going up and down stairs, and pain and discomfort of waist when sitting up and standing up. All patients were treated with total knee arthroplasty. The control group was treated with traditional total knee arthroplasty, and the experimental group was treated with total knee arthroplasty under the computer navigation system. The operation related conditions of the two groups were recorded and compared including the operation time and hospitalization time; the changes of hemoglobin and hematocrit of the two groups were detected and compared before and 5 days after the operation; the blood loss of the two groups and the induced flow at each time point calculated and compared after the operation, and the perioperative allogeneic blood transfusion rate and average blood transfusion volume of the patients were recorded; The joint function scale (KSS) was used to evaluate the recovery of knee joint function before the operation, 6 and 18 months after the operation respectively and to record the incidence of postoperative infection, lower extremity venous thrombosis and other complications.

All the patients were successfully operated and the prognosis of the wound was good. All the patients were followed up for an average of 18 months. The operation time of the experimental group was longer than that of the control group, and the hospitalization time was shorter than that of the control group (P <0.05) ; the KSS score of the two groups at each time point after operation was higher than that before operation, but the increasing range of the test group was higher than that of the control group (P<0.05) ; there was no significant difference between the two groups in the incidence of complications (P>0.05) .

Under the guidance of computer navigation, total knee arthroplasty can prolong the operation time compared with single total knee arthroplasty, but it is more conducive to reduce perioperative blood loss, reduce the rate of postoperative allogeneic blood transfusion, ideal recovery of joint function, less complications, safety and reliability.