Department of Head and Neck Oncology and Surgery, The Netherlands Cancer Institute-Antoni van Leeuwenhoek Hospital, Amsterdam, The Netherlands.
Head Neck. 2011 Sep;33(9):1285-93. doi: 10.1002/hed.21597. Epub 2010 Oct 27.
This study was designed to assess endotracheal climate in laryngectomized patients in a warm and dry environment and the effects of a heat and moisture exchanger (HME).
Endotracheal temperature and humidity were measured in 11 laryngectomized patients with a regularly used HME (Provox Normal HME; R-HME), an HME with antimicrobial filter (Provox Micron HME; F-HME), and without HME (open stoma). Measurements were performed at 32°C, 34°C, and 38°C (<25% relative humidity).
Both R-HME and F-HME increased end-inspiratory humidity (AH(insp)) equally (range, 3.4 to 5.6 mg H(2)O/L). The R-HME has a cooling effect on end-inspiratory temperature (T(insp)), which is similar for all tested environmental conditions (-3.8°C); F-HME decreases T(insp) less (range, -1.3 to -0.6°C).
In a warm and dry environment, both R- and F-HME significantly cool and humidify inspired air. Therefore, consistent use of an HME under these climate conditions is also probably clinically beneficial.
本研究旨在评估在温暖干燥环境下行全喉切除术患者的气管内气候和热湿交换器（HME）的作用。
对 11 例行全喉切除术患者使用常规 HME（Provox Normal HME；R-HME）、带抗菌过滤器的 HME（Provox Micron HME；F-HME）和无 HME（开放造口）进行气管内温度和湿度测量。测量在 32°C、34°C 和 38°C（<25%相对湿度）下进行。
R-HME 和 F-HME 均能使吸气末湿度（AH(insp)）同等增加（范围，3.4 至 5.6 mg H(2)O/L）。R-HME 对吸气末温度（T(insp)）有冷却作用，在所有测试的环境条件下均相似（-3.8°C）；F-HME 的冷却作用较小（范围，-1.3 至-0.6°C）。
在温暖干燥的环境中，R-和 F-HME 均能显著冷却和加湿吸入的空气。因此，在这些气候条件下持续使用 HME 可能也具有临床益处。
