Nałęcz Institute of Biocybernetics and Biomedical Engineering, Polish Academy of Sciences, Warsaw, Poland.
Diabetes Technol Ther. 2013 Aug;15(8):712-21. doi: 10.1089/dia.2013.0026. Epub 2013 Jul 31.
The present study assesses precision and accuracy of four selected methods of wound area measurements in diabetic foot wounds.
The areas of 16 wound shapes were measured using linear measurement with elliptical estimation (Elliptical method), using the Visitrak™ (Smith & Nephew, London, United Kingdom) device, the SilhouetteMobile™ device (ARANZ Medical Ltd., Christchurch, New Zealand), and the TeleDiaFoS system (Nalecz Institute of Biocybernetics and Biomedical Engineering, Warsaw, Poland). The actual area of a wound shape was determined with a tested scanner and specifically developed software. Accuracy of the area measurement method was assessed by the relative error (RE), whereas precision was assessed by the coefficient of variation (CV).
The overall absolute REs were 13.3%, 6.8%, 2.1%, and 2.3% for the Elliptical method, the Visitrak device, the TeleDiaFoS system, and the SilhouetteMobile device, respectively. The accuracy of the Visitrak device was remarkably reduced for wound areas smaller than 2 cm². The overall CVs were 6.0%, 6.3%, 1.6%, and 3.1% for the Elliptical method, the Visitrak device, the TeleDiaFoS system, and the SilhouetteMobile device, respectively. The precision of the Visitrak device was revealed to be remarkably lower for small wounds (<2 cm²).
The Elliptical method gives overestimation up to 33%; thus, it should not be used in applications where the actual wound area is an important parameter (like the prediction of wound healing). The TeleDiaFoS system and the SilhouetteMobile device showed the best accuracy of all used methods; however, the precision of the TeleDiaFoS system was revealed to be higher than the precision of the SilhouetteMobile device. The accuracy and the precision of the Visitrak device are significantly reduced for wounds smaller than 2 cm².
本研究评估了四种选定的糖尿病足伤口面积测量方法的精度和准确性。
使用带有椭圆估计的线性测量（椭圆法）、使用 VisitrakTM（Smith & Nephew，英国伦敦）设备、SilhouetteMobileTM 设备（ARANZ Medical Ltd.，新西兰基督城）和 TeleDiaFoS 系统（波兰华沙 Nalecz 生物控制与生物工程研究所）测量 16 个伤口形状的面积。通过经过测试的扫描仪和专门开发的软件确定伤口形状的实际面积。通过相对误差 (RE) 评估面积测量方法的准确性，通过变异系数 (CV) 评估精度。
椭圆法、Visitrak 设备、TeleDiaFoS 系统和 SilhouetteMobile 设备的总体绝对 RE 分别为 13.3%、6.8%、2.1%和 2.3%。对于面积小于 2cm²的伤口，Visitrak 设备的准确性显著降低。椭圆法、Visitrak 设备、TeleDiaFoS 系统和 SilhouetteMobile 设备的总体 CV 分别为 6.0%、6.3%、1.6%和 3.1%。对于较小的伤口（<2cm²），发现 Visitrak 设备的精度显著降低。
椭圆法的测量结果存在高达 33%的高估，因此，在需要考虑实际伤口面积的应用中（如伤口愈合预测）不应使用该方法。TeleDiaFoS 系统和 SilhouetteMobile 设备显示出所有使用方法中最佳的准确性；然而，TeleDiaFoS 系统的精度高于 SilhouetteMobile 设备。对于面积小于 2cm² 的伤口，Visitrak 设备的准确性和精度显著降低。
