Comparison of blood loss from conventional total knee arthroplasty (TKA) and Computer-assisted surgery (CAS TKA) in patients attending Warinchamrap Hospital, Ubon Ratchathani Province

Abstract

This quasi-experimental research objective was to compare the mean difference between blood loss in conventional total knee arthroplasty (TKA) and computer-assisted surgery (CAS TKA) in patients attending Warinchamrap Hospital, Ubon Ratchathani Province. The sample group was divided into 2 groups: 17 patients underwent navigated TKA, and 15 underwent conventional TKA. Data were collected using questionnaires and data sheets to record before and after the experiment between 1 January 2019 and 30 September 2020. Statistical analysis was performed using descriptive statistics and presented in percentages, mean and standard deviations. The mean difference of blood loss of gender, age and blood loss after intergroup trials were compared using Independent t-test. According to body mass index (BMI), the mean difference of blood loss was compared using One-way ANOVA statistic at a significant level of 0.05. The results of comparison of hemorrhage according to gender, age, and body mass index showed that different sexes, ages, and BMI had not different effect on surgical hemorrhage (t = -. 968, p = .341; t = - .354, p = .726 and F = .277, p = .987, respectively) The results of comparing mean of blood loss between surgical methods were found the average blood loss of CAS is 421.77 ml (S.D.=81.94 ml). Conventional TKA is 506.67 ml (S.D.=82.25 ml). The blood loss of CAS was significantly lower than that of the TKA (Mean diff=84.90, 95%CI=25.51-144.29, p-value=0.0066). Based on the results, the CAS could reduce the amount of blood loss after surgery than TKA. Therefore, the aforementioned method should be applied to patients who come to the Warinchamrap Hospital for knee replacement surgery.