Gold Coast Hospital, Gold Coast, Queensland, Australia.
Eur J Emerg Med. 2013 Apr;20(2):123-5. doi: 10.1097/MEJ.0b013e32835730fc.
The aim of the study was to determine whether the placement of a SmartSite antireflux valve between a bag of fluid with line giving set and an intravenous cannula decreases the flow rate. Fluid flow rates were compared in paired experiments with and without an antireflux valve using a pressure infuser or allowing fluid to flow by gravity only for four different sizes of intravenous cannulas (20-14 G). Antireflux valves significantly decreased the fluid flow rates for all cannula sizes, irrespective of whether a pressure infuser was used. The decrease in the flow rate was most marked for larger cannulas [gravity only: 14 G: 52% (95% confidence interval (CI): 37-68), 16 G: 39% (95% CI: 34-43); pressure bag: 14 G: 74% (95% CI: 70-78), 16 G: 56% (95% CI: 54-57); all P<0.001]. Where maximum fluid flow rates are desirable, clinicians should consider not using an antireflux valve.
本研究旨在确定在液体袋与输液管之间放置 SmartSite 反流阀是否会降低流速。通过压力输液器或仅让液体通过重力流动，对四种不同尺寸的静脉内套管（20-14 G）进行配对实验，比较有和没有反流阀时的流体流速。无论是否使用压力输液器，反流阀都会显著降低所有套管尺寸的流体流速。对于较大的套管，流速下降更为明显[仅重力：14 G：52%（95%置信区间（CI）：37-68），16 G：39%（95% CI：34-43）；压力袋：14 G：74%（95% CI：70-78），16 G：56%（95% CI：54-57）；所有 P<0.001]。在需要最大流速的情况下，临床医生应考虑不使用反流阀。
