McConnell Jamie, Dillon John, Kinninmonth Andrew, Sarungi Martin, Picard Frederic
Golden Jubilee National Hospital, Clydebank, Scotland, UK.
Acta Orthop Belg. 2012 Feb;78(1):75-9.
Perioperative blood loss was compared in 136 patients (2 groups of 68 patients) who underwent total knee arthroplasty (TKA). Blood loss was significantly lower when using a computer-navigated technique in comparison to a method employing intramedullary femoral rods. Total blood loss was calculated from body weight, height and haematocrit change, using a model that has been shown to reliably estimate true blood loss. Average total blood loss was 1362 ml in the standard TKA group, and 1137 ml in the computer navigated TKA group. This difference was statistically significant (p = 0.016). This study, as compared to previous papers assessing the effects of navigation, used a larger sample size and a more reliable method of assessing blood loss, which takes account of "hidden" losses, and confirms their findings.
对136例行全膝关节置换术（TKA）的患者（分为两组，每组68例）的围手术期失血情况进行了比较。与采用股骨髓内棒的方法相比，使用计算机导航技术时的失血量显著更低。总失血量通过体重、身高和血细胞比容变化，采用一种已被证明能可靠估计真实失血量的模型来计算。标准TKA组的平均总失血量为1362毫升，计算机导航TKA组为1137毫升。这种差异具有统计学意义（p = 0.016）。与之前评估导航效果的论文相比，本研究使用了更大的样本量以及更可靠的失血量评估方法，该方法考虑了“隐性”失血，并证实了他们的研究结果。
