Loner Carly, Acquisto Nicole M, Lenhardt Heather, Sensenbach Benjamin, Purick Julie, Jones Courtney M C, Cushman Jeremy T
Prehosp Emerg Care. 2018 Sep-Oct;22(5):645-649. doi: 10.1080/10903127.2018.1436208. Epub 2018 Feb 21.
To assess the accuracy of multiple Intravenous Infusion Flow Regulators (IIFRs) at infusion rates and hanging heights common to the prehospital setting.
Five different manufacturer's IIFRs were tested over a range of infusion rates while hanging at heights equivalent to the gurney pole, ambulance ceiling hook, and manufacturer's recommended height (if available). Each IIFR was run over a 15-minute period at each infusion rate and height three times. Drip effluent was collected and measured for comparison of volumes. Intra- and inter-device accuracy at different infusion rates and heights was calculated.
All devices deviated from the expected infusion volume regardless of infusion rate or height. There was inter-device variability across all IIFRs with some having reproducible though inaccurate volumes. Volumes were consistently below expected at lower heights and above expected at increased heights. Manufacturer recommended height guidelines provided slight improvements in accuracy.
Significant deviations from expected IIFR volume were observed across all devices, flow rates, and heights in a static, laboratory environment. These findings would lend caution to the use of IIFRs as they could lead to inaccurate medication dosing (both over- or under-dosing) in the prehospital environment.
评估多种静脉输液流量调节器（IIFRs）在院前环境常见的输液速率和悬挂高度下的准确性。
对五种不同制造商生产的IIFRs在一系列输液速率下进行测试，同时将其悬挂在与担架杆、救护车天花板挂钩高度相当的位置，以及制造商推荐的高度（若有）。每个IIFR在每种输液速率和高度下运行15分钟，重复三次。收集并测量滴出液的体积以进行体积比较。计算不同输液速率和高度下设备内部和设备之间的准确性。
无论输液速率或高度如何，所有设备的实际输液量均与预期不符。所有IIFRs之间存在设备间差异，有些设备的输液量虽可重复但不准确。在较低高度时，输液量始终低于预期，而在高度增加时则高于预期。制造商推荐的高度指南在一定程度上提高了准确性。
在静态的实验室环境中，所有设备、流速和高度下的IIFR实际输液量均与预期存在显著偏差。这些发现提醒人们在使用IIFRs时要谨慎，因为它们可能导致院前环境中药物剂量不准确（用药过量或不足）。
