Clin Nephrol. 2023 Jun;99(6):283-289. doi: 10.5414/CN110818.
Bioimpedance methods are currently used abundantly in patients on chronic hemodialysis. In this population, their most important role is to determine the level of fluid volume, respectively its intra- and extracellular components. There are several bioimpedance devices on the market. In this project, we compared two frequently used devices: Body Composition Monitor and InBody S10.
We invited patients on chronic hemodialysis who are being treated in our institution. Inclusion criteria were: clinically stable condition, lack of artificial joints, pacemakers, or other implanted metal objects. The examinations were performed just prior to hemodialysis by both methods 5 minutes apart. Patients were examined in the supine position after 15 minutes at rest to stabilize body fluids. Studied parameters were those that are obtainable by both methods: total body water (TBW) (L), extracellular water (ECW) (L) and intracellular water (ICW) (kg), lean tissue mass (LTM) (L), and fat tissue mass (kg).
We included 14 participants (aged 64.4 ± 18.0 years). Statistically and clinically significant differences between data from compared devices were observed for all variables. Inbody S10 overestimated TBW by 2.58 ± 2.73 L and ICW by 4.56 ± 2.27 L in comparison to BCM. The highest difference (27%) was measured for LTM and ICW 22%. LTM, fat, and ECW were higher when measured by BCM (LTM by 8.54 ± 6.43 kg, p < 0.001; fat by 3.41 ± 4.22, p = 0.01; ECW by 2.01 ± 0.89 L, p < 0.001).
The differences between tested devices were significant not only statistically, but also clinically. These two devices cannot be used interchangeably for dry weight setting of hemodialysis patients.
生物阻抗法目前在慢性血液透析患者中广泛应用。在该人群中，其最重要的作用是确定液体量水平，分别是细胞内和细胞外成分。市场上有几种生物阻抗设备。在本项目中，我们比较了两种常用设备：身体成分监测仪和 InBody S10。
我们邀请了在我们机构接受治疗的慢性血液透析患者。纳入标准为：临床状况稳定，无人工关节、起搏器或其他植入金属物体。两次检查相隔 5 分钟，均在血液透析前进行。患者在休息 15 分钟后仰卧位检查，以稳定体液。研究参数为两种方法均可获得的参数：总体水（TBW）（L）、细胞外液（ECW）（L）和细胞内液（ICW）（kg）、瘦组织质量（LTM）（L）和脂肪组织质量（kg）。
我们纳入了 14 名参与者（年龄 64.4 ± 18.0 岁）。与比较设备的数据相比，所有变量均观察到统计学和临床显著差异。与 BCM 相比，Inbody S10 高估了 TBW 2.58 ± 2.73 L 和 ICW 4.56 ± 2.27 L。差异最大（27%）的是 LTM 和 ICW 22%。BCM 测量时，LTM、脂肪和 ECW 更高（LTM 为 8.54 ± 6.43 kg，p < 0.001；脂肪为 3.41 ± 4.22，p = 0.01；ECW 为 2.01 ± 0.89 L，p < 0.001）。
测试设备之间的差异不仅在统计学上而且在临床上都具有显著性。这两种设备不能在血液透析患者干体重设置中互换使用。
