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1 results

  • Total nasal airway resistance while sitting predicts airway collapse when lying down

  • A Karlsson, M Persson, A-C Mjörnheim, G Gudnadottir, J Hellgren
  • Journal:
    The Journal of Laryngology & Otology / Volume 134 / Issue 10 / October 2020
    Published online by Cambridge University Press:
    27 October 2020, pp. 917-924
    Print publication:
    October 2020
  • Background

    Nasal obstruction when lying down is a common complaint in patients with chronic nasal obstruction, but rhinomanometry is typically performed in the sitting position. This study aimed to analyse whether adding rhinomanometry in a supine position is a useful examination.

    Method

    A total of 41 patients with chronic nasal obstruction underwent rhinomanometry and acoustic rhinometry, sitting and supine, before and after decongestion, as well as an over-night polygraphy.

    Results

    Total airway resistance was measurable in a supine position in 48 per cent (14 of 29) of the patients with total airway resistance of equal to or less than 0.3 Pa/cm3/second when sitting and in none (0 of 12) of the patients with total nasal airway resistance of more than 0.3 Pa/cm3/second when sitting. After decongestion, this increased to 83 per cent and 58 per cent, respectively.

    Conclusion

    Increased nasal resistance when sitting predicts nasal breathing problems when supine. Rhinomanometry in a supine position should be performed to diagnose upper airway collapse when supine.