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Physiological modulation of eustachian tube function.

J E Leclerc1, W J Doyle, W Karnavas

  • 1Department of Otolaryngology, Children's Hospital of Pittsburgh.

Acta Oto-Laryngologica
|November 1, 1987
PubMed
Summary
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Changing body position affects Eustachian tube opening time (TOT) and nasal conductance (NC). These measurements, along with nasal cycles, suggest autonomic modulation of tubal mucosa.

Area of Science:

  • Otolaryngology
  • Physiology

Background:

  • The Eustachian tube (ET) plays a crucial role in middle ear pressure regulation.
  • Nasal conductance (NC) reflects airflow resistance in the nasal cavity.
  • Understanding factors influencing ET function and nasal airflow is important for diagnosing and treating related conditions.

Purpose of the Study:

  • To investigate the impact of body position changes on Eustachian tube opening time (TOT) and nasal conductance (NC).
  • To explore the relationship between TOT, NC, and the nasal cycle.

Main Methods:

  • Eustachian tube function was assessed using sonotubometry.
  • Nasal conductance was measured via anterior or posterior rhinomanometry.
  • Tests were conducted in subjects in both erect and recumbent positions, and over a 5-7 hour period.

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Main Results:

  • Both TOT and NC decreased when subjects moved from an erect to a recumbent position.
  • A nasal cycle was observed in all subjects.
  • TOT correlated with ipsilateral NC in 3 subjects and contralateral NC in 2 subjects.

Conclusions:

  • Body position significantly influences Eustachian tube opening and nasal airflow.
  • The findings suggest that tubal mucosa undergoes cyclic fluctuations modulated by the autonomic nervous system.
  • Autonomic regulation may play a role in Eustachian tube and nasal mucosal congestion.