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Pathological study of otitis media with effusion after treatment with intranasal pulmonary surfactant

Authors

  • Zheng Hua Zhu MD,

    1. Department of Otolaryngology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
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  • Ying Jun Shan MD,

    1. Department of Otolaryngology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
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  • Yang Han MD,

    1. Department of Pathology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
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  • Li Wei Zhu MD,

    1. Department of Otolaryngology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
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  • Zhao Xin Ma MD

    Corresponding author
    1. Department of Otolaryngology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
    • Send correspondence to Zhao Xin Ma, MD, Department of Otolaryngology, Shanghai East Hospital, Tongji University School of Medicine, 150 Jimo Road, Shanghai 200120, China. E-mail: mzhx114@163.com

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  • The authors have no other funding, financial relationships, or conflicts of interest to disclose.

Abstract

Objectives/Hypothesis

To evaluate the histopathological effect of intranasal pulmonary surfactant (PS) on the eustachian tube (ET) in guinea pigs with otitis media with effusion (OME).

Study Design

Randomized control trial.

Methods

Nonviable heat-killed Hemophilus influenzae solution was injected into the tympanum of guinea pigs by a trans-eardrum approach to establish OME. Guinea pigs were divided into four groups: normal controls (group A), untreated OME (group B), saline-treated (group C), PS-treated (group D). The response threshold of the guinea pigs was measured by auditory brainstem response (ABR), and data were analyzed by one-way analysis of variance. The histopathological changes in the osseous, cartilaginous, and muscular portions of the ET were observed systematically by light microscopy.

Results

The ABR threshold in OME group B was raised significantly compared with normal group (A). The response in saline-treated group C was not statistically significantly different compared with OME group B. Seven days after intranasal dripping of pulmonary surfactant in PS-treated group D, the response threshold showed at statistically significant decrease compared with OME B and saline-treated C groups. In OME group B and saline-treated group C, mucosa showed swelling with goblet cell hyperplasia, and cilia were irregularly arranged. In PS-treated group D, there was slight mucosal swelling with fewer goblet cells, and cilia were regularly arranged, similar to the normal group A.

Conclusions

The findings of the study indicate that intranasal pulmonary surfactant drops have protective and hyposecretory effects on the mucociliary system of the ET in guinea pigs suffering from OME.

Level of Evidence

NA. Laryngoscope, 123:3148–3155, 2013

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