Department of Pathology and Immunology, Division of Laboratory and Genomic Medicine, Washington University, St. Louis, MO.
J Appl Lab Med. 2020 Nov 1;5(6):1345-1350. doi: 10.1093/jalm/jfaa081.
Validation of hospital pneumatic tube systems (PTS) is recommended to predict and prevent errors caused by sample hemolysis. 3-Axis accelerometer dataloggers have been successfully implemented as tools for PTS validation, but the most suitable device for such validation has not been investigated. The aim of this study was to evaluate the performance of four commercially available 3-axis accelerometers for PTS validation.
PCE-VD3 (PCE), CEM DT-178A (CEM), Extech VB300 (EXT), and MSR 145 (MSR) dataloggers were placed into a single PTS carrier and repeatedly transported through one of three PTS routes. The number and magnitude of accelerations within each PTS route was collected by each device. Deming regression analysis was used to compare device performance.
The MSR datalogger captured the greatest number of g-forces >3 g, 5 g, 10 g, and 15 g, and the greatest magnitude of g-force (26.7 g) relative to the other devices (CEM: 23.0 g, EXT: 23.3 g, PCE: 23.7 g). As a result of increased sampling frequency, the MSR recorded the lowest AUC and the greatest number of g-forces exceeding 3 g relative to the other devices. Subjectively, the data were difficult to extract from 4 tested devices.
Commercially available dataloggers differ in their ability to detect the number and magnitude of g-forces within PTSs. We recommend that one device be used to perform all PTS evaluations, with baseline evaluations for tolerable AUC, number, and magnitude of g-forces established internally. Lack of harmonization, cumbersome data processing, and time-consuming data analysis are substantial barriers to universal implementation of dataloggers for PTS validation and monitoring.
建议对医院气动输送系统（PTS）进行验证，以预测和防止因样本溶血引起的错误。三轴加速度计数据记录仪已成功用作 PTS 验证工具，但尚未研究最适合此类验证的设备。本研究旨在评估四种市售三轴加速度计在 PTS 验证中的性能。
将 PCE-VD3（PCE）、CEM DT-178A（CEM）、Extech VB300（EXT）和 MSR 145（MSR）数据记录仪放置在单个 PTS 载体中，并通过三个 PTS 路线之一反复运输。每个设备都收集了每个 PTS 路线内的加速度数量和大小。采用 Deming 回归分析比较设备性能。
MSR 数据记录仪捕获了最大数量的 >3g、5g、10g 和 15g 的加速度，以及最大的加速度力（26.7g），与其他设备（CEM：23.0g、EXT：23.3g、PCE：23.7g）相比。由于采样频率增加，MSR 记录的 AUC 最低，超过 3g 的加速度数量最多。主观上，从 4 种测试设备中提取数据较为困难。
市售的数据记录仪在检测 PTS 内加速度数量和大小的能力上存在差异。我们建议使用一种设备进行所有 PTS 评估，并在内部建立可接受的 AUC、加速度数量和大小的基线评估。缺乏协调、繁琐的数据处理和耗时的数据分析是普遍实施 PTS 验证和监测数据记录仪的重大障碍。
