Immune Modulatory Oligonucleotides in Prevention of Nasal Allergen—Induced Eustachian Tube Dysfunction in Rats

2007 ◽  
Vol 137 (2) ◽  
pp. 250-255 ◽  
Author(s):  
Charles S. Ebert ◽  
Austin S. Rose ◽  
Deidra A. Blanks ◽  
Rose P. Eapen ◽  
Ekambar R. Kandimalla ◽  
...  
Keyword(s):  
Eustachian Tube ◽  
Otitis Media With Effusion ◽  
Randomized Study ◽  
Allergic Inflammation ◽  
Eustachian Tube Dysfunction ◽  
Brown Norway ◽  
Tube Dysfunction ◽  
Dynamic Measures ◽  
Phosphate Buffered Saline

OBJECTIVES: Develop a model of nasal allergen-induced Eustachian tube dysfunction (ETD) in a rat and investigate the role of immune modulatory oligonucleotides (IMOs) in the prevention of nasal allergen-induced ETD. STUDY DESIGN AND SETTING: Prospective, randomized study. Brown Norway rats were sensitized to ova albumin (OVA) and randomized to receive pretreatment with IMOs or phosphate-buffered saline. All animals were challenged intranasally with aerosolized OVA. Dynamic measures of Eustachian tube (ET) function were analyzed. RESULTS: Animals that were OVA-sensitized and IMO-pre-treated had significantly lower mean passive opening (95% confidence interval [95% CI] 15.0,19.4) and closing (95% CI 4.8,7.8) ET pressures compared with those of (95% CI 24.1,32.7) and (95% CI 12.1,18,8) OVA-sensitized untreated rats, respectively. In addition, the IMO-pretreated animals demonstrated the ability to actively clear a significantly higher proportion of negative pressure (95% CI 0.64,0.96) compared with the untreated animals (95% CI 0.09,0.39). IMO-pretreated animals also demonstrated significantly improved mean mucociliary clearance times in seconds (95% CI 115,195) than those in untreated animals (95% CI 308,668). CONCLUSIONS: Pretreatment with IMOs prevented allergen-induced allergic inflammation around the Eustachian tube (ET) and resulted in improved ventilatory function of the ET compared with sensitized untreated animals. IMOs offer considerable promise in the management of nasal allergic disease as well as otitis media with effusion.

Immune Modulatory Oligonucleotides in the Prevention and Treatment of OVA-Induced Eustachian Tube Dysfunction in Rats

2007 ◽  
Vol 137 (2) ◽  
pp. 321-326 ◽  
Author(s):  
Deidra A. Blanks ◽  
Charles S. Ebert ◽  
Rose P. Eapen ◽  
Carlton Zdanski ◽  
Ekambar R. Kandimalla ◽  
...  
Keyword(s):  
Eustachian Tube ◽  
Negative Pressure ◽  
Mucociliary Clearance ◽  
Otitis Media With Effusion ◽  
Allergic Inflammation ◽  
Eustachian Tube Dysfunction ◽  
Brown Norway ◽  
Control Group ◽  
Prevention And Treatment ◽  
Tube Dysfunction

BACKGROUND: Otitis media with effusion (OME) is often associated with allergies. Immune modulatory oligonucleotides (IMO) mediate allergic inflammation and may therefore be efficacious in the treatment of airway inflammation. OBJECTIVE: To evaluate the role of an IMO via transtympanic mucosal application in prevention and treatment of ovalbumin-induced OME. DESIGN: Forty brown Norway rats were divided into control and treatment groups. Eustachian tube dysfunction was evaluated by passive opening pressures, passive closing pressures, active clearance of negative pressure, and mucociliary clearance transit time. RESULTS: Rats who underwent IMO treatment required 50% less pressure to open and close the eustachian tube ( P < 0.05) and were able to actively clear 50% more negative pressure than the ovalbumin-control rats ( P < 0.001). The treatment rats' mucociliary clearance time was half that of the control group ( P < 0.001). CONCLUSION: IMO via transtympanic application can prevent and treat allergy-induced eustachian tube dysfunction in rats. IMO may offer substantial promise in the future management of OME.

The Role of IgE-Mediated Hypersensitivity in Otitis Media with Effusion: A 1987 Update

1987 ◽  
Vol 1 (2) ◽  
pp. 67-72
Author(s):  
Joel M. Bernstein
Keyword(s):  
Allergic Rhinitis ◽  
Otitis Media ◽  
Eustachian Tube ◽  
Otitis Media With Effusion ◽  
Eustachian Tube Dysfunction ◽  
Upper Respiratory Tract ◽  
Direct Role ◽  
Tube Dysfunction ◽  
Ige Mediated

The role of IgE-mediated hypersensitivity in the development of middle ear disease has not been completely resolved. However, on the basis of our investigations and those of other laboratories, we would suggest that approximately two-thirds of patients with chronic recurrent otitis media (OM) are not allergic. The other third may have allergic rhinitis, and this allergic rhinitis may play a direct role in producing eustachian tube dysfunction in recurrent OM. However, viral infections of the upper respiratory tract may also induce IgE-mediated release of mast cell inflammatory mediators and could cause OM on the basis of viral infection alone. The role of allergic rhinitis on eustachian tube dysfunction is now well documented, and finally, the possible role of food allergy and OM must be seriously considered, particularly in the young OM-prone child with chronic recurrent rhinitis and OM.

Transient Inflammation and Dysfunction of the Eustachian Tube Secondary to Multiple Exposures of Simulated Gastroesophageal Refluxant

2001 ◽  
Vol 110 (10) ◽  
pp. 928-934 ◽  
Author(s):  
S. Brett Heavner ◽  
Stuart M. Hardy ◽  
Jiri Prazma ◽  
David R. White ◽  
Harold C. Pillsbury
Keyword(s):  
Hydrochloric Acid ◽  
Gastroesophageal Reflux ◽  
Eustachian Tube ◽  
Middle Ear ◽  
Negative Pressure ◽  
Saline Solution ◽  
Otitis Media With Effusion ◽  
Eustachian Tube Dysfunction ◽  
Tube Dysfunction ◽  
Phosphate Buffered Saline

Gastroesophageal reflux is a common problem in the newborn and preschool periods. Recent research suggests that it may be related to eustachian tube dysfunction and otitis media with effusion. The purpose of this experiment was to investigate the relationship between simulated gastroesophageal reflux and eustachian tube dysfunction. Rat middle ears were repeatedly exposed (transtympanically) to pepsin in hydrochloric acid or to phosphate-buffered saline solution. Their eustachian tube function was evaluated by assessing passive opening and passive closing pressures, and active clearance of positive and negative pressure. The passive pressure function tests showed variable results. The rats exposed to pepsin in hydrochloric acid had an impaired ability to clear positive and negative pressure from the middle ear as compared to the rats exposed only to phosphate-buffered saline solution. The results demonstrate that multiple middle ear exposures to pepsin in hydrochloric acid leads to eustachian tube dysfunction in rats.

scholarly journals Eustachian Tube Dysfunction in Children With Adenoid Hypertrophy: The Role of Adenoidectomy for Improving Ear Ventilation

2021 ◽  
pp. 014556132198945
Author(s):  
Alessandra Manno ◽  
Giannicola Iannella ◽  
Vincenzo Savastano ◽  
Tommaso Vittori ◽  
Serena Bertin ◽  
...  
Keyword(s):  
Eustachian Tube ◽  
Otitis Media With Effusion ◽  
Preoperative Evaluation ◽  
Mean Value ◽  
Eustachian Tube Dysfunction ◽  
Adenoid Hypertrophy ◽  
Before And After ◽  
Middle Ear Ventilation ◽  
Tube Dysfunction ◽  
The Impact

Introduction: To our knowledge, few papers have addressed preoperative evaluation of the impact of adenoid hypertrophy (AH) on the pathogenesis of eustachian tube dysfunction (ETD) in children with otitis media with effusion (OME). Aim: The aim of this study was 2-fold: first, to evaluate ETD using tubomanometry and Eustachian Tube Score 7 (ETS-7), in a group of children having AH; second, to assess the clinical impact of adenoidectomy on the ETD of these patients. Methods: Fifty patients, aged 4 to 15 years, underwent adenoidectomy based on various parameters: size of the adenoids causing canal obstruction (grades 1-4), the presence of OME, and recurrent episodes of rhinosinusitis. The function of the eustachian tube was evaluated using ETS-7 before and after surgical treatment. The patients were followed up for 6 months. Results: Forty children presented ETD. Of these, 36 had a grade 4 AH. The preoperative mean value for ETS-7 was 6.62. The mean postoperative ETS-7 score showed a value of 9.60 with a statistical difference compared to the preoperative value ( P = .0015). Conclusions: Adenoid hypertrophy has a high impact on the frequency of ETD. In the patients observed in the present study, the ETS-7 score appeared to be a valid tool for assessing ETD both preoperatively and postoperatively. Adenoidectomy seemed to be effective in improving ETD as well as middle ear ventilation.

Relationship between Eustachian tube dysfunction and otitis media with effusion in radiotherapy patients

2018 ◽  
Vol 132 (2) ◽  
pp. 111-116 ◽  
Author(s):  
K Akazawa ◽  
H Doi ◽  
S Ohta ◽  
T Terada ◽  
M Fujiwara ◽  
...  
Keyword(s):  
Radiation Dose ◽  
Otitis Media ◽  
Eustachian Tube ◽  
Otitis Media With Effusion ◽  
Intensity Modulated Radiotherapy ◽  
Eustachian Tube Dysfunction ◽  
Dose Volume ◽  
Tube Dysfunction ◽  
The Relationship ◽  
Higher Doses

AbstractObjective:This study evaluated the relationship between radiation and Eustachian tube dysfunction, and examined the radiation dose required to induce otitis media with effusion.Methods:The function of 36 Eustachian tubes in 18 patients with head and neck cancer were examined sonotubometrically before, during, and 1, 2 and 3 months after, intensity-modulated radiotherapy. Patients with an increase of 5 dB or less in sound pressure level (dB) during swallowing were categorised as being in the dysfunction group. Additionally, radiation dose distributions were assessed in all Eustachian tubes using three dose–volume histogram parameters.Results:Twenty-two of 25 normally functioning Eustachian tubes before radiotherapy (88.0 per cent) shifted to the dysfunction group after therapy. All ears that developed otitis media with effusion belonged to the dysfunction group. The radiation dose threshold evaluation revealed that ears with otitis media with effusion received significantly higher doses to the Eustachian tubes.Conclusion:The results indicate a relationship between radiation dose and Eustachian tube dysfunction and otitis media with effusion.

The Role of Eustachian Tube Dysfunction in Immune-Mediated Middle Ear Effusion and Inflammation

1985 ◽  
Vol 12 ◽  
pp. S203-S205 ◽  
Author(s):  
Allen F. Ryan ◽  
Jeffrey P. Harris ◽  
Antonino Catanzaro ◽  
Stephen I. Wasserman
Keyword(s):  
Eustachian Tube ◽  
Middle Ear ◽  
Eustachian Tube Dysfunction ◽  
Middle Ear Effusion ◽  
Immune Mediated ◽  
Tube Dysfunction ◽  
Ear Effusion

Refractory otitis media with effusion from viewpoints of eustachian tube dysfunction and nasal sinusitis

1993 ◽  
Vol 14 (3) ◽  
pp. 187-190 ◽  
Author(s):  
Akihiko Fujita ◽  
Iwao Honjo ◽  
Kyosuke Kurata ◽  
I-Ken Gan ◽  
Haruo Takahashi
Keyword(s):  
Otitis Media ◽  
Eustachian Tube ◽  
Otitis Media With Effusion ◽  
Eustachian Tube Dysfunction ◽  
Tube Dysfunction

scholarly journals An alternative treatment approach for patients with resistant otitis media with effusion and dysfunctional Eustachian tube: A pilot study with rapid maxillary expansion

2021 ◽  
Author(s):  
Nihat Kılıç ◽  
Özgür Yörük ◽  
Songül Cömert Kılıç
Keyword(s):  
Otitis Media ◽  
Eustachian Tube ◽  
Otitis Media With Effusion ◽  
Rapid Maxillary Expansion ◽  
Eustachian Tube Dysfunction ◽  
Control Group ◽  
Maxillary Expansion ◽  
Tube Dysfunction ◽  
Maxillary Constriction ◽  
Observation Period

ABSTRACT Objectives To determine whether dysfunctional Eustachian tubes of children with resistant otitis media with effusion (OME), ventilation tube placement indication, and maxillary constriction will recover after rapid maxillary expansion (RME). Materials and Methods The RME group consisted of 15 children (mean age: 10.07 years) with maxillary constriction, Eustachian tube dysfunction (ETD), and resistant OME. The control group consisted of 11 healthy children (mean age: 8.34 years) with no orthodontic and/or rhinologic problems. Recovery of Eustachian tube dysfunction was evaluated by Williams' test at three timepoints: before RME/at baseline (T0); after RME (T1); and after an observation period of 10 months (T2). The control group was matched to all these periods, except T1. Results In the control group, functioning Eustachian tubes were observed in all ears at baseline (T0), and tubes showed no worsening and no change during the observation period (T2) (P &gt; .05). In the RME group, functioning Eustachian tubes were observed in eight of 30 ears and ETD was observed in the remaining 22 ears at baseline (T0). The RME group showed significant improvements in tube functions after RME and the observation period (P &lt; .05). Fifteen of 22 dysfunctional ears recovered (68.2%) and started to exhibit normal Eustachian tube function after RME (T1) and the observation period (T2). Conclusions The findings suggest that ears having poorly functioning Eustachian tubes are restored and recovered after RME in most of children with maxillary constriction and resistant OME. Thus, RME should be preferred as a first therapy alternative for children with maxillary constriction and serous otitis media.

Biological Mediators of Inflammation in Middle Ear Effusions

1976 ◽  
Vol 85 (2_suppl) ◽  
pp. 90-96 ◽  
Author(s):  
Joel M. Bernstein
Keyword(s):  
Otitis Media ◽  
Eustachian Tube ◽  
Middle Ear ◽  
Potential Role ◽  
Otitis Media With Effusion ◽  
Chemotactic Factor ◽  
Mediators Of Inflammation ◽  
Tube Dysfunction ◽  
Middle Ear Cleft

Four biological mediators of inflammation have been found in middle ear effusions from patients with otitis media with effusion. They are chemotactic factor(s), macrophage inhibition factor(s), activated complement and prostaglandins. The potential role of these mediators has been discussed in relation to their potential for maintaining inflammation in the middle ear cleft after Eustachian tube dysfunction.

An easier way of inserting the Shah permavent grommet

2005 ◽  
Vol 119 (1) ◽  
pp. 36-37 ◽  
Author(s):  
J Tahery ◽  
S R Saeed
Keyword(s):  
Otitis Media ◽  
Eustachian Tube ◽  
Otitis Media With Effusion ◽  
Eustachian Tube Dysfunction ◽  
Ventilation Tube ◽  
Tube Insertion ◽  
Simple Modification ◽  
Tube Dysfunction ◽  
Long Term Ventilation

Ventilation tube insertion plays an important role in the management of otitis media with effusion. In selected cases, repeated grommet insertion due to persistent eustachian tube dysfunction necessitates the need for longer-term ventilation. Insertion of such tubes can however occasionally be more difficult than insertion of standard grommets. One such long-term ventilation tube is the Shah permavent grommet. This paper describes a simple modification of the technique that is less time-consuming and less traumatic.

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