The comparison of two kinds of limb length measurement in total hip arthroplasty with modified hardinge approaches / 中国现代医生

ABSTRACT

Objective To compare the effectiveness of two kinds of limb length measurement in total hip arthroplasty (THA) with modified Hardinge approaches on equal length of lower extremities. Methods Clinical records of 151 patients who had been through one-side THAwith modified Hardinge approaches for the first time in our hospital from January 2015 to May 2017 were retrospectively analyzed. Two limb length measurements were applied: 84 patients were measured using X-ray normal side control (group A) and 67 patients were measured using location method of Kirschner pin (group B). The operation duration, blood loss during operation, length difference of lower limbs, the incidence of unequal length of lower limbs, hospitalization time and Harris scores of hip function were compared between two groups. Results All of 151 patients completed the follow-up visit. The duration of operation in group Awas statistically longer than that in group B[(107. 32±12. 01) min vs (94. 56±15. 39) min)] (P＜0. 05). The length difference of lower limbs in group Awas significantly smaller than that in group B[(1. 08±0. 52) mm vs (3. 79±1. 54) mm)] (P＜0. 05). The blood loss during operation, the incidence of unequal length of lower limbs, hospitalization time and Harris score of hip function in two groups were not statistically different. Conclusion Between two methods mentioned above, X-ray normal side control (group A) was more accurate than the location method of Kirschner pin(group B) in length control of lower limbs, but it took longer duration of operation than group B.