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. 2010 Jun;3(2):70-5.
doi: 10.3342/ceo.2010.3.2.70. Epub 2010 Jun 30.

Factors affecting the extrusion rate of ventilation tubes

Chang Myeon Song  1 , Min-Hyun Park, Young Ho Kim, Jun Ho Lee
Affiliations

Factors affecting the extrusion rate of ventilation tubes

Chang Myeon Song et al. Clin Exp Otorhinolaryngol. 2010 Jun.

Abstract

Objectives: The objective of this study was to determine the various factors that affect the extrusion rate of ventilation tubes (VTs), including the nature of the middle ear effusion.

Methods: A retrospective chart review of 82 pediatric patients (177 ears) who received VT insertion surgery under general anesthesia was carried out to evaluate the relationship between various factors and the VT extrusion rate. The factors we analyzed included age, gender, the adenoid size, the amount and content of the middle ear effusion after myringotomy, bleeding events, associated adenoidectomy and the findings of the tympanic membrane status, the tympanometry and the audiometry of the air bone gap.

Results: The mean extrusion time was 254 days (range, 11 to 809 days). The patients with no history of previous VT insertion had a longer extrusion time (mean, 279 days) than did the patients who had undergone previous VT insertion (mean, 203 days). The patients with serous effusion had the shortest extrusion time (mean, 190 days) as compared to those patients with glue (273 days) and pus (295 days) effusions. Other factors had no statistical significant relationship with the extrusion time.

Conclusion: The mean VT extrusion time was 254 days. The VT extrusion time was significantly related to the characteristics of the middle ear effusion and a history of previous VT insertion. Thus, the nature of middle ear effusion can provide a clinical clue to predict the VT extrusion time.

Keywords: Extrusion rate; Extrusion time; Middle ear effusion; Otitis media with effusion; Tympanostomy tube; Ventilation tube.

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Conflict of interest statement

No potential conflict of interest relevant to this article was reported.

Figures

Fig. 1
Fig. 1
Extrusion time of the ventilation tube. Frequency histogram of the ventilation tube extrusion time. The ventilation tube's mean extrusion time was 9.1 months (254 days).
See this image and copyright information in PMC

References

    1. Teele DW, Klein JO, Rosner B. Epidemiology of otitis media during the first seven yr of life in children in greater Boston: a prospective, cohort study. J Infect Dis. 1989 Jul;160(1):83–94. - PubMed
    1. Leopold DA, McCabe BF. Factors influencing tympanostomy tube function and extrusion: a study of 1,127 ears. Otolaryngol Head Neck Surg. 1980 Jul–Aug;88(4):447–454. - PubMed
    1. Shah N. Use of grommets in 'glue' ears. J Laryngol Otol. 1971 Mar;85(3):283–287. - PubMed
    1. Valtonen H, Qvarnberg Y, Nuutinen J. Tympanostomy in young children with recurrent otitis media: a long-term follow-up study. J Laryngol Otol. 1999 Mar;113(3):207–211. - PubMed
    1. Mackenzie IJ. Factors affecting the extrusion rates of ventilation tubes. J R Soc Med. 1984 Sep;77(9):751–753. - PMC - PubMed