Michael E. DeBakey Veterans Affairs Medical Center, Houston, Texas, USA.
Texas Woman's University Institute of Health Science Center, Houston, Texas, USA.
Nutr Clin Pract. 2021 Feb;36(1):219-224. doi: 10.1002/ncp.10410. Epub 2019 Sep 22.
Adequate delivery of both enteral formula and water in patients receiving enteral nutrition (EN) is critical. Pump accuracy has been identified as a factor impeding enteral formula delivery; however, rarely is enteral water delivery investigated. The purpose of this study was to explore accuracy of delivering 1 L of water by EN pumps using different flush volumes and hang heights.
Three EN pumps were used in vitro to flush 1 L of water at 50 mL every hour for 20 hours (50 mL, 20 times per day) and 500 mL every 4 hours for 8 hours (500 mL, 2 times per day) at 0 in. and 18 in. (or 45.72 cm) hang heights. Fifteen runs were conducted at each volume and hang height per pump. Actual delivered enteral water, remaining volume in enteral feeding bags, and volume reported per pump were recorded.
Hang height of 18 in. delivered a mean 3.91% (95% CI, 3.25-4.57) more water than bags hung at 0 in. (P < .0005). When delivering water in 500 mL increments, 1.57% (95% CI, 0.92-2.23) more water was delivered than when delivered in 50 mL increments (P < .005).
Appropriate hang height recommendations improve enteral water delivery in patients receiving EN. The most accurate setting was 500 mL at 18 in., resulting in accurate water delivery in 97.8% of runs, whereas 50 mL at 0 in. delivered accurately 17.8% of the time. Appropriate bag hang height and water delivery volume is critical to maintain hydration status of patients receiving EN.
接受肠内营养（EN）的患者，充足提供肠内配方和水至关重要。输送泵的准确性已被确定为妨碍肠内配方输送的因素之一；然而，很少有研究调查肠内水输送。本研究的目的是探讨使用不同冲洗量和悬挂高度的 EN 泵输送 1 L 水的准确性。
使用 3 台 EN 泵在体外以 50 mL 每小时的速度冲洗 1 L 水，20 小时（50 mL，每天 20 次）和每 4 小时冲洗 500 mL 水，8 小时（500 mL，每天 2 次），悬挂高度为 0 英寸和 18 英寸（或 45.72 厘米）。每个泵在每个体积和悬挂高度下进行 15 次运行。记录实际输送的肠内水、肠内喂养袋中剩余的体积和泵报告的体积。
悬挂高度为 18 英寸时输送的水比悬挂高度为 0 英寸时多 3.91%（95%CI，3.25-4.57）（P <.0005）。当以 500 mL 增量输送水时，输送的水量比以 50 mL 增量输送时多 1.57%（95%CI，0.92-2.23）（P <.005）。
适当的悬挂高度建议可改善接受 EN 的患者的肠内水输送。最准确的设置是 18 英寸处的 500 mL，在 97.8%的运行中实现了准确的水输送，而 0 英寸处的 50 mL 准确输送的时间为 17.8%。适当的袋悬挂高度和水输送量对于维持接受 EN 的患者的水合状态至关重要。
