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Related Experiment Videos

Insertion of ventilation tubes: does the site matter?

J D Hern1, D A Jonathan

  • 1Department of Otolaryngology, Frimley Park Hospital, Surrey, UK.

Clinical Otolaryngology and Allied Sciences
|October 30, 1999
PubMed
Summary

Ventilation tube placement in the tympanic membrane does not significantly impact how long it stays in. This study found no difference in extrusion rates between superior and inferior placements for Shah grommets.

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Area of Science:

  • Otolaryngology
  • Pediatric Otology

Background:

  • Ventilation tube extrusion time is influenced by factors like tube design, insertion technique, and infection.
  • Theoretical models suggest superior tympanic membrane placement may prolong ventilation tube retention.

Purpose of the Study:

  • To investigate the effect of ventilation tube placement (anterosuperior vs. anteroinferior quadrant) on extrusion rates in children.

Main Methods:

  • A randomized prospective study involving 54 children.
  • Comparison of extrusion rates for Shah grommets placed in anterosuperior versus anteroinferior tympanic membrane quadrants.

Main Results:

  • No statistically significant difference was observed in the extrusion rates between the anterosuperior and anteroinferior quadrants.

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  • The placement location did not affect the duration the Shah grommet remained in the tympanic membrane.

    • Conclusions:

    • The theoretical advantage of superior ventilation tube placement for prolonged retention was not supported by this study.
    • For Shah grommets, tympanic membrane quadrant placement does not appear to influence extrusion rates.