PDF(Pubmed)
Abstract：
UNASSIGNED: The physiological effects of HFNC devices are closely related to temperature and humidity. HFNC devices from different manufacturers may have varied performances. It is unclear whether there are differences in the humidification performance of different HFNC devices and the degree of differences.
UNASSIGNED: Four integrated HFNC devices (AIRVO 2, Fisher & Paykel Healthcare, Auckland, New Zealand; TNI softFlow 50, TNI Medical AG, Würzburg, Germany; HUMID-BH, RESPIRACARE, Shenyang, China; OH-70C, Micomme, Hunan, China) and a ventilator with an HFNC module (bellavista 1000, Imtmedical, Buchs, Switzerland) were evaluated using their matching circuits. The dew point temperature was set at 31, 34, and 37°C (set-DP). In MR850, it was set to non-invasive mode (34°C/-3°C) and invasive mode (40°C/-3°C), respectively. At each level of set-DP, the flow was set from 20 L/min up to its maximum set limit at a gradient of 5 L/min or 10 L/min. After stabilization, the dew point temperature, temperature, relative humidity, and flow rate of the delivered gas from the cannulas were recorded.
UNASSIGNED: There were significant differences in actual-DP among these devices at any set-DP (p < 0.001). The actual-DP of OH-70C and TNI softFlow 50 was lower than set-DP, and the difference between the actual-DP and the set-DP of these two devices increased with the increase of set-DP. AIRVO 2, bellavista 1000 (MR850), and HUMID-BH can provide the nominal humidity at 37°C. The actual-DP increased with the increase of set-flow under each set-DP in AIRVO 2, TNI softFlow 50 and bellavista 1000 (MR850), but decreased when the set-flow was greater than 60 L/min. The actual-T of the delivered gas was higher than actual-DP in all devices and was higher than set-DP in AIRVO 2 and HUMID-BH.
UNASSIGNED: Set-flow, set-DP, and types of devices will affect the actual temperature and humidity of the delivered gas. AIRVO 2, bellavista 1000 (MR850), and HUMID-BH can provide the nominal humidity at 37°C and may be more suitable for tracheotomy patients. The flow rate over 60 L/min should be set with caution.
UNASSIGNED: Four integrated HFNC devices (AIRVO 2, Fisher & Paykel Healthcare, Auckland, New Zealand; TNI softFlow 50, TNI Medical AG, Würzburg, Germany; HUMID-BH, RESPIRACARE, Shenyang, China; OH-70C, Micomme, Hunan, China) and a ventilator with an HFNC module (bellavista 1000, Imtmedical, Buchs, Switzerland) were evaluated using their matching circuits. The dew point temperature was set at 31, 34, and 37°C (set-DP). In MR850, it was set to non-invasive mode (34°C/-3°C) and invasive mode (40°C/-3°C), respectively. At each level of set-DP, the flow was set from 20 L/min up to its maximum set limit at a gradient of 5 L/min or 10 L/min. After stabilization, the dew point temperature, temperature, relative humidity, and flow rate of the delivered gas from the cannulas were recorded.
UNASSIGNED: There were significant differences in actual-DP among these devices at any set-DP (p < 0.001). The actual-DP of OH-70C and TNI softFlow 50 was lower than set-DP, and the difference between the actual-DP and the set-DP of these two devices increased with the increase of set-DP. AIRVO 2, bellavista 1000 (MR850), and HUMID-BH can provide the nominal humidity at 37°C. The actual-DP increased with the increase of set-flow under each set-DP in AIRVO 2, TNI softFlow 50 and bellavista 1000 (MR850), but decreased when the set-flow was greater than 60 L/min. The actual-T of the delivered gas was higher than actual-DP in all devices and was higher than set-DP in AIRVO 2 and HUMID-BH.
UNASSIGNED: Set-flow, set-DP, and types of devices will affect the actual temperature and humidity of the delivered gas. AIRVO 2, bellavista 1000 (MR850), and HUMID-BH can provide the nominal humidity at 37°C and may be more suitable for tracheotomy patients. The flow rate over 60 L/min should be set with caution.
摘要：
■HFNC装置的生理作用与温度和湿度密切相关。来自不同制造商的HFNC装置可具有不同的性能。目前尚不清楚不同HFNC装置的加湿性能是否存在差异以及差异程度。
■四个集成HFNC设备（AIRVO2，Fisher＆PaykelHealthcare，奥克兰,新西兰;TNIsoftFlow50,TNIMedicalAG,维尔茨堡,德国；HUMID-BH,呼吸道护理,沈阳,中国；OH-70C,Micomme,湖南,中国）和带有HFNC模块的呼吸机（bellavista1000，Imtmedical，Buchs,瑞士）使用其匹配电路进行了评估。露点温度设定在31、34和37°C(set-DP)。在MR850中，将其设置为非侵入式模式（34°C/-3°C）和侵入式模式（40°C/-3°C），分别。在每个级别的set-DP，在5L/min或10L/min的梯度下,流量设定为从20L/min直至其最大设定极限。稳定后,露点温度,温度,相对湿度,并且记录来自套管的输送气体的流速。
■在任何设置DP下，这些设备之间的实际DP存在显着差异（p<0.001）。OH-70C和TNIsoftFlow50的实际DP低于set-DP，并且这两个设备的实际DP和集合DP之间的差异随着集合DP的增加而增加。AIRVO2，贝拉维斯塔1000(MR850)，和HUMID-BH可以提供37°C的标称湿度。实际DP随着AIRVO2、TNIsoftFlow50和bellavista1000(MR850)中每个set-DP下的set-flow的增加而增加,但当设定流量大于60L/min时下降。在所有设备中，输送气体的实际T高于实际DP，在AIRVO2和HUMID-BH中高于设定DP。
■设置流，set-DP,和设备类型将影响输送气体的实际温度和湿度。AIRVO2，贝拉维斯塔1000(MR850)，和HUMID-BH可以提供37°C的标称湿度，可能更适合气管切开患者。流量超过60L/min应谨慎设定。
■四个集成HFNC设备（AIRVO2，Fisher＆PaykelHealthcare，奥克兰,新西兰;TNIsoftFlow50,TNIMedicalAG,维尔茨堡,德国；HUMID-BH,呼吸道护理,沈阳,中国；OH-70C,Micomme,湖南,中国）和带有HFNC模块的呼吸机（bellavista1000，Imtmedical，Buchs,瑞士）使用其匹配电路进行了评估。露点温度设定在31、34和37°C(set-DP)。在MR850中，将其设置为非侵入式模式（34°C/-3°C）和侵入式模式（40°C/-3°C），分别。在每个级别的set-DP，在5L/min或10L/min的梯度下,流量设定为从20L/min直至其最大设定极限。稳定后,露点温度,温度,相对湿度,并且记录来自套管的输送气体的流速。
■在任何设置DP下，这些设备之间的实际DP存在显着差异（p<0.001）。OH-70C和TNIsoftFlow50的实际DP低于set-DP，并且这两个设备的实际DP和集合DP之间的差异随着集合DP的增加而增加。AIRVO2，贝拉维斯塔1000(MR850)，和HUMID-BH可以提供37°C的标称湿度。实际DP随着AIRVO2、TNIsoftFlow50和bellavista1000(MR850)中每个set-DP下的set-flow的增加而增加,但当设定流量大于60L/min时下降。在所有设备中，输送气体的实际T高于实际DP，在AIRVO2和HUMID-BH中高于设定DP。
■设置流，set-DP,和设备类型将影响输送气体的实际温度和湿度。AIRVO2，贝拉维斯塔1000(MR850)，和HUMID-BH可以提供37°C的标称湿度，可能更适合气管切开患者。流量超过60L/min应谨慎设定。
