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14.02.2019 | AIRWAY BIOLOGY | Ausgabe 2/2019

Lung 2/2019

Proof of Concept: Very Rapid Tidal Breathing Nasal Nitric Oxide Sampling Discriminates Primary Ciliary Dyskinesia from Healthy Subjects

Lung > Ausgabe 2/2019
Mathias G. Holgersen, June K. Marthin, Kim G. Nielsen
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The online version of this article (https://​doi.​org/​10.​1007/​s00408-019-00202-x) contains supplementary material, which is available to authorized users.

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Nasal nitric oxide (nNO) is extremely low in individuals with primary ciliary dyskinesia (PCD) and is recommended as part of early workup. We investigated whether tidal breathing sampling for a few seconds was as discriminative between PCD and healthy controls (HC) as conventional tidal breathing sampling (cTB-nNO) for 20–30 s.


We performed very rapid sampling of tidal breathing (vrTB-nNO) for 2, 4 and 6 s, respectively. Vacuum sampling with applied negative pressure (vrTB-nNOvac; negative pressure was applied by pinching the sampling tube) for < 2 s resulted in enhanced suction of nasal air during measurement. Feasibility, success rate, discriminatory capacity, repeatability and agreement were assessed for all four sampling modalities.


We included 13 patients with PCD, median (IQR) age of 21.8 (12.2–27.7) years and 17 HC, 25.3 (14.5–33.4) years. Measurements were highly feasible (96.7% success rate). Measured NO values with vrTB-nNO modalities differed significantly from TB-nNO measurements (HC: p < 0.001, PCD: p < 0.05). All modalities showed excellent discrimination. The vacuum method gave remarkably high values of nNO in both groups (1865 vs. 86 ppb), but retained excellent discrimination. vrTB-nNO4sec, vrTB-nNO6sec and vrTB-nNOvac showed identical specificity to cTB-nNO (all: 1.0, 95% CI 0.77–1.0).


vrTB-nNO sampling requires only a few seconds of probe-in-nose time, is feasible, and provides excellent discrimination between PCD and HC. Rapid TB-nNO sampling needs standardisation and further investigations in infants, young children and patients referred for PCD workup.

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