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首页> 外文期刊>Surgical Endoscopy >Development of a new membrane-type heated humidifier for laparoscopic surgery.
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Development of a new membrane-type heated humidifier for laparoscopic surgery.

机译：新型用于腹腔镜手术的膜式加热加湿器的开发。

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BACKGROUND: Recently, several animal studies showed that the core body temperature falls during pneumoperitoneum, and this hypothermia could be prevented by using heated and humidified gas insufflation. However, there are no satisfactory heated humidifiers to meet this purpose. Therefore, we developed a new membrane-type heated humidifier. MATERIALS AND METHODS: The newly developed heated humidifier employs an ion-exchange membrane (Nafion: Du Pont Co. Ltd) tube that passes water selectively in molecular form and a gas compartment is completely separated from distilled water to prevent infection. This humidifier consists of a Nafion tube assembly and a case that includes the heater. A perforated protecting tube is located outside the Nafion tube to prevent direct contact with the Nafion tube when it is assembled. The Nafion tube assembly is inserted in the case, and dry gas flows inside of the Nafion tube. The space between the case and the Nafion tube assembly is filled with distilled water. A heater raises the temperature of the distilled water, and heat and water vapor are transferred to cold and dry gas through the Nafion membrane. Four different types of insufflators were involved in this performance comparison study: a Nafion-based heated and humidified insufflator, a conventional heated insufflator, a conventional heated and humidified insufflator, and a conventional cold and dry insufflator. Temperature and relative humidity were measured once each minute for 15 min, which was repeated four times. Each insufflator was operated at two rates of flow: 5 L/min and 10 L/min. RESULTS: Temperature and humidity of the conventional cold and dry insufflator, the Nafion membrane-type heated and humidified insufflator, the conventional heated insufflator, and the conventional heated and humidified insufflator measured at the distal end of circuit reached 22.0 +/- 0.2 degrees C and 0%, 36.7 +/- 1.1 degrees C and 100%, 29.0 +/- 0.4 degrees C and 0%, and 31.3 +/- 0.4 degrees C and 70.5 +/- 5.3% in 15 min at 5 L/min flow rates. At 10 L/min flow rates, temperature and humidity were almost the same as those at 5 L/min. The membrane-type heated humidifier demonstrated statistically significant improvement in both the temperature ( p < 0.0001) and relative humidity ( p < 0.0001) parameters in comparison to the conventional normal, heated, or heated and humidified insufflators at 5 L/min and 10 L/min continuous flow rate in statistics using repeated-measure ANOVA. CONCLUSION: This newly developed heated humidifier offers the great advantages of maintaining intraabdominal temperature and humidity in comparison to conventional insufflators for laparoscopic surgery.
机译：背景：最近，一些动物研究表明，气腹时核心体温下降，可以通过使用加热和加湿的气体吹入法来预防这种体温过低。但是，没有令人满意的加热加湿器来达到这个目的。因此，我们开发了一种新型的膜式加热加湿器。材料与方法：新开发的加热加湿器采用离子交换膜（Nafion：Du Pont Co. Ltd）管，该管以分子形式选择性地通过水，并且气体室与蒸馏水完全隔离，以防止感染。该加湿器由Nafion管组件和一个装有加热器的外壳组成。穿孔的保护管位于Nafion管的外部，以防止在组装时与Nafion管直接接触。将Nafion管组件插入外壳中，并使干燥气体在Nafion管内部流动。外壳和Nafion管组件之间的空间充满了蒸馏水。加热器提高蒸馏水的温度，热量和水蒸气通过Nafion膜传递到冷干气体中。该性能比较研究涉及四种不同类型的吹入器：基于Nafion的加热和加湿吹入器，常规的加热吹入器，常规的加热和加湿吹入器以及常规的冷干吹入器。每分钟测量一次温度和相对湿度，持续15分钟，重复四次。每个吹入器以两种流速运行：5 L / min和10 L / min。结果：常规冷干吹入器，Nafion膜式加热加湿吹入器，常规加热吹入器和常规加热加湿吹入器在回路末端测得的温度和湿度达到22.0 +/- 0.2摄氏度在5 L / min流量下，在15分钟内达到0％，36.7 +/- 1.1摄氏度和100％，29.0 +/- 0.4摄氏度和0％，31.3 +/- 0.4摄氏度和70.5 +/- 5.3％费率。流量为10 L / min时，温度和湿度几乎与5 L / min时相同。与传统的正常，加热或加热加湿的吹入器相比，膜片式加热加湿器在温度（p <0.0001）和相对湿度（p <0.0001）参数上均具有统计学上的显着改善，分别为5 L / min和10 L / min连续流量使用重复测量方差分析进行统计。结论：与用于腹腔镜手术的常规吹入器相比，这种新开发的加热加湿器具有保持腹部内温度和湿度的巨大优势。

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