Cornaggia G, Chidini G, Stella L
Dipartimento di Scienze Neuropsichiche, IRCCS S. Raffaele, Milano.
Minerva Anestesiol. 1994 Nov;60(11):649-55.
To determine the efficiency, during general anaesthesia, of four commercially available HMEs, with particular attention to the change of performances due to the new modifications introduced by the manufacturers.
Comparisons of the performances of each HMEs with psychometric method in terms of T degree C, RH (%), AH (mgH2O/1) of inhaled and expired gases.
A sample of 28 patients under general anesthesia longer than 150 minutes, undergone elective urological surgery. Patients with cardiological, respiratory and metabolic impairments have been excluded.
The measurements of T degree C, RH and AH have been performed with thermometric probes every minute. The collected data have been analyzed by Student's "t"-test for unpaired data.
The obtained data show that a good conditioning of the inhaled gases is possible, although only few HMEs satisfy the requirements indicated in the ISO and BSI standards.
确定四种市售热湿交换器（HME）在全身麻醉期间的效率，尤其关注制造商引入的新改进所导致的性能变化。
采用心理测量方法，就吸入和呼出气体的温度（℃）、相对湿度（%）、绝对湿度（mgH₂O/l）对每种HME的性能进行比较。
选取28例接受择期泌尿外科手术、全身麻醉时间超过150分钟的患者作为样本。排除患有心脏、呼吸和代谢功能障碍的患者。
每分钟使用温度探头进行温度（℃）、相对湿度和绝对湿度的测量。收集的数据采用成组设计t检验进行分析。
所得数据表明，尽管只有少数HME符合ISO和BSI标准规定的要求，但对吸入气体进行良好调节是可能的。
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