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Inhaled nasopharyngeal nitric oxide concentrations during unilateral nostril breathing – a pilot study
Respiratory Physiology & Neurobiology ( IF 2.3 ) Pub Date : 2021-06-29 , DOI: 10.1016/j.resp.2021.103734
Tim H A Stassen 1 , Jim Bartley 2 , David E White 2
Affiliation  

The yogic pranayama technique of unilateral nostril breathing (UNB) has previously demonstrated improvements in language and anxiety in stroke sufferers, as well as reduced blood pressure and increased heart rate in normal healthy adults. The nose typically passes different amounts of air through each nostril with the greater amount of air passing through the ‘patent’ side, and a lesser amount through the ‘congested’ side. Each side of the nose periodically takes turns at carrying the dominant tidal air flow in what is termed the’ nasal cycle’. The nasal sinuses are a rich source of inhaled nitric oxide, a colourless and odourless gas that acts as a bronchodilator, vasodilator, and neurotransmitter. Nasal derived nitric oxide (NO) may contribute to the benefits attributed to UNB. This investigation seeks to assess the influence the nasal cycle has on inhaled nasopharyngeal NO concentrations during UNB by comparing unobstructed bilateral nostril breathing to patent-side and congested-side UNB in healthy individuals demonstrating a nasal cycle.

After determining the patent and congested nasal sides in healthy adult volunteers, and sampling air at both nostrils, nasopharyngeal inhaled NO concentrations were then assessed during normal nasal at-rest tidal breathing during three different nasal breathing states: first both nostrils, then allocated in randomised order, patent side only, and congested side with only UNB.

Nasopharyngeal NO concentrations were found to be consistently higher on both exhalation and inhalation during congested side UNB, when compared with either unilateral patent side UNB or breathing through both nostrils.



中文翻译:

单侧鼻孔呼吸时吸入鼻咽一氧化氮浓度——一项初步研究

单侧鼻孔呼吸 (UNB) 的瑜伽调息技术先前已证明可以改善中风患者的语言和焦虑,以及降低正常健康成年人的血压和增加心率。鼻子通常通过每个鼻孔通过不同量的空气,通过“通畅”侧的空气量较大,通过“拥挤”侧的空气量较少。在所谓的“鼻循环”中,鼻子的每一侧周期性地轮流携带占主导地位的潮汐气流。鼻窦是吸入一氧化氮的丰富来源,一氧化氮是一种无色无味的气体,可作为支气管扩张剂、血管扩张剂和神经递质。鼻源性一氧化氮 (NO) 可能有助于 UNB 带来的益处。

在确定健康成年志愿者的通畅和鼻侧充血,并在两个鼻孔采样空气后,然后在三种不同的鼻呼吸状态下,在正常鼻静息潮式呼吸期间评估鼻咽吸入的 NO 浓度:首先是两个鼻孔,然后随机分配顺序、仅专利侧和仅具有 UNB 的拥塞侧。

与单侧未闭侧 UNB 或通过双鼻孔呼吸相比,在充血侧 UNB 期间,鼻咽 NO 浓度在呼气和吸气时始终较高。

更新日期:2021-06-29
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