Kubo Takamitsu, Nakajima Hiroaki, Shimoda Ryo, Seo Tatsuya, Kanno Yurie, Kondo Toshikazu, Tamai Sunao
Medical Equipment Center, Shizuoka Cancer Center Hospital, Shizuoka Prefecture, Japan.
Division of Anesthesiology, Shizuoka Cancer Center Hospital, Shizuoka Prefecture, Japan.
Respir Care. 2018 Mar;63(3):267-273. doi: 10.4187/respcare.05668. Epub 2018 Feb 6.
High-flow nasal cannula (HFNC) oxygen therapy produces noise at a level such that patients often complain. However, the noise level has not been measured digitally.
We evaluated 3 types of HFNCs without filters and 2 types with filters attached for noise reduction. Optiflow (with and without a filter), MaxVenturi (with and without a filter) and AIRVO2 (without a filter only) were positioned at the center of a hospital room. We measured the noise levels at the distance of 1 m from the equipment at various total flows (30, 40, 50, 60 L/min) and F (0.40, 0.60, and 0.90).
Noise levels were increased with the AIRVO2 and MaxVenturi when total flow and F were increased. Noise levels decreased with the MaxVenturi when a filter was used. The noise level did not change with the Optiflow when total flow and F were increased. The noise level decreased in the groups with AIRVO2 and Optiflow compared with MaxVenturi without a filter.
The findings in this study show that the noise level of HFNC/Venturi could be reduced by attaching an intake filter. However, the noise level of HFNC/blender and HFNC/turbine decreased in comparison with HFNC/Venturi without an intake filter.
高流量鼻导管（HFNC）氧疗会产生一定程度的噪音，患者常因此抱怨。然而，噪音水平尚未进行数字测量。
我们评估了3种不带过滤器的HFNC和2种带降噪过滤器的HFNC。将Optiflow（带和不带过滤器）、MaxVenturi（带和不带过滤器）以及AIRVO2（仅不带过滤器）放置在医院病房中央。我们在不同总流量（30、40、50、60升/分钟）和F（0.40、0.60和0.90）条件下，测量了距离设备1米处的噪音水平。
当总流量和F增加时，AIRVO2和MaxVenturi的噪音水平升高。使用过滤器时，MaxVenturi的噪音水平降低。当总流量和F增加时，Optiflow的噪音水平不变。与不带过滤器的MaxVenturi相比，AIRVO2和Optiflow组的噪音水平降低。
本研究结果表明，通过安装进气过滤器可降低HFNC/文丘里管的噪音水平。然而，与不带进气过滤器的HFNC/文丘里管相比，HFNC/混合器和HFNC/涡轮机的噪音水平降低。
