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[The larynx: an anatomical and functional echographic study].

F Zappia1, R Campani

  • 1Associazione Medicina e Tecnologica (AMT), Torino. francescozappia@virgilio.it

La Radiologia Medica
|July 6, 2000
PubMed
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Ultrasound (US) effectively measures laryngeal structures and respiratory space dynamically. This imaging technique aids in diagnosing conditions like vocal cord paralysis and monitoring treatment progress.

Area of Science:

  • Medical Imaging
  • Anatomy
  • Physiology

Background:

  • Ultrasound (US) is a non-invasive imaging modality.
  • Laryngeal structure and function are crucial for voice production and respiration.
  • Accurate assessment of laryngeal dynamics is important for diagnosis and treatment.

Purpose of the Study:

  • To evaluate the capabilities of ultrasound in the morphological and functional assessment of laryngeal structures.
  • To determine the accuracy of US in measuring vocal cord dimensions and respiratory space.

Main Methods:

  • Fifty healthy subjects (30 female, 20 male, aged 23-74) were examined, including 17 professional opera singers.
  • Ultrasound imaging was performed with the neck in hypertension using 7.5-12.0 MHz probes.
  • Scans were acquired at rest and during various breathing and phonation tasks (e.g., Valsalva, 'e', 'o').

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Main Results:

  • All measurable laryngeal anatomical structures were clearly visualized.
  • Vocal cord lengths ranged from 16-28 mm (women) and 20-23 mm (men).
  • Respiratory space varied from 2-8 mm during different respiratory and speech phases.

Conclusions:

  • Ultrasound enables precise measurements of laryngeal anatomy and respiratory space, both at rest and dynamically.
  • These measurements are valuable for conditions such as vocal cord paralysis and for monitoring treatment outcomes.
  • US can detect atypical laryngeal conditions, including false/true vocal cord hypertrophy and abnormal cord growth.