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Influence of water immersion on the airway impedance measured by forced oscillation technique
Respiratory Physiology & Neurobiology ( IF 2.3 ) Pub Date : 2021-08-26 , DOI: 10.1016/j.resp.2021.103779
Daisuke Hoshi 1 , Marina Fukuie 1 , Shinsuke Tamai 2 , Reiko Momma 2 , Takashi Tarumi 3 , Jun Sugawara 3 , Koichi Watanabe 4
Affiliation  

Introduction

Few studies have examined the influence of different water depths on the airway impedance measured by forced oscillation technique in healthy adults.

Methods

Eleven healthy men (23.2 ± 1.5 years old) participated in this study. We measured the respiratory impedance assessed with the resistance at frequency of 5 Hz and 20 Hz, the reactance at frequency of 5 Hz, and frequency of resonance. To compare the influence of water depths, we carried out one dryland (DL) and two water level conditions: clavicle level (CL) and xiphoid appendix level (XA).

Results

The respiratory resistance at frequency of 5 Hz was higher in CL and XA than DL, and at 20 Hz was significantly higher in CL than DL. The respiratory reactance at 5 Hz was lower in CL and XA than DL, and frequency of resonance was higher in CL and XA than DL.

Conclusion

These results suggested that water immersion above xiphoid appendix level increase airway resistance.



中文翻译:

水浸对强迫振荡法测量气道阻抗的影响

介绍

很少有研究检查不同水深对健康成人用强制振荡技术测量的气道阻抗的影响。

方法

11 名健康男性(23.2 ± 1.5 岁)参加了这项研究。我们测量了用 5 Hz 和 20 Hz 频率下的电阻、5 Hz 频率下的电抗和共振频率评估的呼吸阻抗。为了比较水深的影响,我们进行了一种旱地(DL)和两种水位条件:锁骨水平(CL)和剑突阑尾水平(XA)。

结果

CL 和 XA 在 5 Hz 频率下的呼吸阻力高于 DL,在 20 Hz 频率下 CL 明显高于 DL。CL和XA的5Hz呼吸电抗低于DL,CL和XA的共振频率高于DL。

结论

这些结果表明,剑突阑尾水平以上的水浸泡会增加气道阻力。

更新日期:2021-09-01
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