全髋关节置换后的隐性失血

背景：全髋关节置换之后常存在隐性失血，隐性失血对患者置换后的功能恢复影响很大。 目的：探讨全髋关节置换后失血的相关影响因素。 方法：回顾性分析接受全髋关节置换850例患者临床资料，根据ward等设计的通过血细胞比容计算红细胞循环血量的数学方法和Gross线性方程计算隐性失血量。通过单因素分析方法，分析性别、年龄、体质量指数、疾病类型、下肢深静脉血栓、置换后抗凝方式、假体类型等对置换后隐性失血的影响。 结果与结论:全髋关节置换后患者的隐性失血明显高于显性失血，体质量指数、疾病类型、假体类型是全髋关节置换后隐性失血量的影响因素，而性别、年龄、抗凝方式、下肢深静脉血栓对置换后隐性失血形成的影响不大。

Hidden blood loss after total hip arthroplasty

BACKGROUND:Hidden blood loss commonly occurs after total hip arthroplasty, and has great impact on function recovery after replacement. OBJECTIVE:To investigate relative factors for hidden blood loss after total hip arthroplasty. METHODS:A retrospective study of the clinical data of 850 consecutive patients who underwent total hip arthroplasty was carried on. The hidden blood loss was calculated according to Ward designed mathematical methods through calculating circulating blood volume of red blood cells using hematocrit and Cross formula linear equation. The effects of patient gender, age, body mass index, type of disease, deep vein thrombosis, postoperative anticoagulation method and type of prosthesis on the postoperative hidden blood loss were analyzed. RESULTS AND CONCLUSION:The amount of hidden blood loss after total hip arthroplasty was higher than that of obvious blood loss. Body mass index, type of disease and type of prosthesis could influence the amount of hidden blood loss after total hip arthroplasty, while the influences of patient gender, age, anticoagulation method and lower extremity deep vein thrombosis on hidden blood loss after total hip arthroplasty were not significant.