Satoh J, Yamakage M, Wasaki S I, Namiki A
Department of Anesthesiology, Sapporo Medical University School of Medicine, Sapporo, Hokkaido, Japan.
Anaesth Intensive Care. 2006 Feb;34(1):46-50. doi: 10.1177/0310057X0603400109.
This study compared the intravenous fluid warming capabilities of three systems at different flow rates. The devices studied were a water-bath warmer, a dry-heat plate warmer, and an intravenous fluid tube warmer Ambient temperature was controlled at 22 degrees to 24 degrees C. Normal saline (0.9% NaCl) at either room temperature (21 degrees to 23 degrees C) or at ice-cold temperature (3 degrees to 5 degrees C) was administered through each device at a range of flow rates (2 to 100 ml/min). To mimic clinical conditions, the temperature of the fluid was measured with thermocouples at the end of a one metre tube connected to the outflow of the warmer for the first two devices and at the end of the 1.2 m warming tubing for the intravenous fluid tube warmer The temperature of fluid delivered by the water bath warmer increased as the flow rate was increased up to 15 to 20 ml/min but decreased with greater flow rates. The temperature of the fluid delivered by the dry-heat plate warmer significantly increased as the flow rate was increased within the range tested (due to decreased cooling after leaving the device at higher flow rates). The temperature of fluid delivered by the intravenous fluid tube warmer did not depend on the flow rate up to 20 ml/min but significantly and fluid temperature-dependently decreased at higher flow rates (>30 ml/min). Under the conditions of our testing, the dry heat plate warmer delivered the highest temperature fluid at high flow rates.
本研究比较了三种系统在不同流速下的静脉输液加温能力。所研究的设备包括一个水浴加温器、一个干热板加温器和一个静脉输液管加温器。环境温度控制在22摄氏度至24摄氏度。将室温（21摄氏度至23摄氏度）或冰冷温度（3摄氏度至5摄氏度）的生理盐水（0.9%氯化钠）通过每个设备以一系列流速（2至100毫升/分钟）进行输注。为模拟临床情况，对于前两种设备，在连接到加温器流出端的一米长管末端用热电偶测量液体温度；对于静脉输液管加温器，在1.2米加温管末端测量液体温度。水浴加温器输送的液体温度在流速增加至15至20毫升/分钟时升高，但在更高流速时降低。在测试范围内，随着流速增加，干热板加温器输送的液体温度显著升高（这是由于在更高流速下离开设备后冷却减少）。静脉输液管加温器输送的液体温度在流速达到20毫升/分钟之前不依赖于流速，但在更高流速（>30毫升/分钟）时显著且与液体温度相关地降低。在我们的测试条件下，干热板加温器在高流速下输送的液体温度最高。
