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首页> 外文期刊>Current opinion in anaesthesiology >Forced-air warming: technology, physical background and practical aspects.
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Forced-air warming: technology, physical background and practical aspects.

机译：强制空气加热：技术，物理背景和实践方面。

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PURPOSE OF REVIEW: There is an ever-increasing number of forced-air warming devices available in the market. However, there is also a paucity of studies that have investigated the physical background of these devices, making it difficult to find the most suitable ones. RECENT FINDINGS: Heat flow produced by power units depends on the air temperature at the nozzle and the airflow. The heat transfer from the blanket to the body surface depends on the heat exchange coefficient, the temperature gradient between the blanket and the body surface and the area that is covered. Additionally, the homogeneity of heat distribution inside the blanket is very important. The lower the temperature difference between the highest and the lowest blanket temperature, the better the performance of the blanket. SUMMARY: The efficacy of a forced-air warming system is mainly determined by the design of the blankets. A good forced-air warming blanket can easily be detected by measuring the temperature difference between the highest blanket temperature and the lowest blanket temperature. This temperature difference should be as low as possible. Because of the limited efficacy of forced-air warming systems to prevent hypothermia, patients must be prewarmed for 30-60 min even if a forced-air warming system is used during the operation. During the operation, the largest blanket that is possible for the operation should be used.
机译：审查目的：市场上有越来越多的强制空气加热设备。但是，也很少有研究调查了这些设备的物理背景，因此很难找到最合适的设备。最近发现：动力装置产生的热流取决于喷嘴处的空气温度和气流。从毯子到身体表面的热传递取决于热交换系数，毯子和身体表面之间的温度梯度以及被覆盖的区域。另外，毯子内部热分布的均匀性非常重要。最高和最低橡皮布温度之间的温度差越小，橡皮布的性能越好。总结：强制通风加热系统的功效主要取决于毯子的设计。通过测量最高橡皮布温度和最低橡皮布温度之间的温差，可以轻松地检测出良好的强制空气加热橡皮布。该温差应尽可能小。由于强制空气加热系统预防体温过低的功效有限，即使在手术过程中使用了强制空气加热系统，也必须对患者预热30-60分钟。在操作过程中，应使用最大可能的毯子。

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