Department of Urology, University of Minnesota, Minneapolis, MN, USA.
Department of Urology, University of Michigan, Ann Arbor, MI, USA.
Urolithiasis. 2018 Aug;46(4):343-348. doi: 10.1007/s00240-017-1006-x. Epub 2017 Oct 4.
High fluid intake is an effective preventative strategy against recurrent kidney stones but is known to be challenging to achieve. Recently, a smart water bottle (Hidrate Spark™, Minneapolis, MN) was developed as a non-invasive fluid intake monitoring system. This device could help patients who form stones from low urine volume achieve sustainable improvements in hydration, but has yet to be validated in a clinical setting. Hidrate Spark™ uses capacitive touch sensing via an internal sensor. It calculates volume measurements by detecting changes in water level and sends data wirelessly to users' smartphones through an application. A pilot study was conducted to assess accuracy of measured fluid intake over 24 h periods when used in a real life setting. Subjects were provided smart bottles and given short tutorials on their use. Accuracy was determined by comparing 24-h fluid intake measurements calculated through the smart bottle via sensor to standard volume measurements calculated by the patient from hand over the same 24 h period. Eight subjects performed sixty-two 24-h measurements (range 4-14). Mean hand measurement was 57.2 oz/1692 mL (21-96 oz/621-2839 mL). Corresponding mean smart bottle measurement underestimated true fluid intake by 0.5 ozs. (95% CI -1.9, 0.9). Percent difference between hand and smart bottle measurements was 0.0% (95% CI - 3%, 3%). Intraclass correlation coefficient (ICC), calculated to assess consistency between hand measures and bottle measures, was 0.97 (0.95, 0.98) indicating an extremely high consistency between measures. 24-h fluid intake measurements from a novel fluid monitoring system (Hidrate Spark™) are accurate to within 3%. Such technology may be useful as a behavioral aide and/or research tool particularly among recurrent stone formers with low urinary volume.
高液体摄入量是预防复发性肾结石的有效策略，但众所周知，实现这一目标具有挑战性。最近，一种智能水瓶（Hidrate Spark™，明尼苏达州明尼阿波利斯）被开发为一种非侵入性的液体摄入监测系统。该设备可以帮助因尿量低而形成结石的患者实现可持续的水分摄入改善，但尚未在临床环境中得到验证。Hidrate Spark™ 使用内部传感器通过电容触摸感应来计算体积测量值。它通过检测水位变化来计算体积测量值，并通过应用程序将数据无线发送到用户的智能手机。一项初步研究评估了在真实生活环境中使用时，24 小时内测量液体摄入量的准确性。研究对象提供了智能瓶，并接受了有关使用方法的简短教程。通过比较智能瓶通过传感器计算的 24 小时液体摄入量测量值与患者在同一 24 小时内手动计算的标准体积测量值，来确定准确性。八名研究对象进行了六十二次 24 小时测量（范围 4-14 次）。手动测量的平均值为 57.2 盎司/1692 毫升（21-96 盎司/621-2839 毫升）。相应的智能瓶测量值平均低估了 0.5 盎司（95%CI-1.9，0.9）的真实液体摄入量。手动测量值和智能瓶测量值之间的百分比差异为 0.0%（95%CI-3%，3%）。评估手动测量值和瓶测量值之间一致性的组内相关系数（ICC）为 0.97（0.95，0.98），表明测量值之间的一致性极高。来自新型液体监测系统（Hidrate Spark™）的 24 小时液体摄入量测量值准确到 3%以内。这种技术可能作为行为辅助工具和/或研究工具特别适用于低尿量的复发性结石形成者。
