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Unilateral and bilateral nasal resistances.

P Cole1, K Naito, R Chaban

  • 1Gage Research Institute, Toronto, Ontario, Canada.

Rhinology
|September 1, 1988
PubMed
Summary
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Nasal resistance measurements show higher variability in untreated noses compared to decongested ones. Factors like mucovascular instability and face masks significantly impact rhinomanometry results.

Area of Science:

  • Respiratory Physiology
  • Medical Instrumentation

Background:

  • Nasal resistance is a key parameter in respiratory function.
  • Accurate measurement of nasal resistance is crucial for diagnosing and managing nasal conditions.

Purpose of the Study:

  • To evaluate the variability and reliability of plethysmographic rhinomanometry.
  • To investigate the impact of nasal decongestion, measurement interval, and facial masking on nasal resistance.
  • To compare measured and calculated total nasal resistance in untreated and decongested states.

Main Methods:

  • Plethysmographic rhinomanometry was used to measure nasal resistance in healthy subjects and patients.
  • Measurements were taken at a transnasal differential pressure of 100 Pa.
  • Variability was assessed using coefficients of variation over time and between nasal cavities.

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Main Results:

  • Untreated nasal resistance showed higher coefficients of variation (11.0-11.8%) compared to decongested nasal resistance (4.7-5.1%).
  • Facial masking increased resistance variability and magnitude in decongested noses.
  • Discrepancies between measured and calculated total nasal resistance were observed in untreated noses.

Conclusions:

  • Nasal decongestion significantly improves the reliability of rhinomanometric measurements.
  • Mucovascular instability and face mask use introduce substantial variability in nasal resistance assessments.
  • These factors contribute to differences between anterior and posterior rhinomanometric evaluations.