Study on analysis of psychometrics property of the quantitative measurement and the guidance for use in patients with lymphedema

本研究的目的是比较非接触式3D数字化仪(日本柯尼卡美能达VividTM)和红外光电系统(PerometerTM，Pero-System)，以水置换和卷尺测量下肢周长和体积为金标准。16名健康志愿者(男10名，女6名)和7名妇科癌症继发性下肢淋巴水肿患者入选研究对象。使用PerometerTM测量的下肢周长具有较高的信度和效度，而使用VividTM的测量结果具有较好的返工信度和效度。两种方法测量肢体体积均有很好的可靠性和较好的效度，PermeterTM和VividTM是评估肢体体积的准确、简便的方法。与水置换和卷尺相比，它们具有各种优势，可能是非常有用的临床工具。

The aim of the study was to compare a non-contact 3D Digitizer (VividTM, Konica Minolta, Japan) and an infrared optoelectronic system (PerometerTM, Pero-system, Germany) with water displacement and a tape measure in lower limb circumference and volume measurement as a gold standard.16 healthy volunteers (10 males and 6 females) and 7 patients with secondary lymphedema of the lower limbs caused by gynecological cancer were enrolled. Lower limb circumference using PerometerTM had great reliability and good validity, while one using VividTM had good to re-work reliability and good validity. Lower limb volume measurement using both had great to good reliability and good validity.PerometerTM and VividTM are accurate and easy method for assessing limb volume. They have various advantages as compared with water displacement and a tape measure, and potentially are very useful clinical tools.