Safety and Efficacy of Intratympanic Application of Dexamethasone Via Catheter in Patients With Sudden Hearing Loss

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00335920
Recruitment Status : Completed
First Posted : June 12, 2006
Last Update Posted : February 5, 2008
Information provided by:
University Hospital Tuebingen

June 9, 2006
June 12, 2006
February 5, 2008
October 2003
July 2006   (Final data collection date for primary outcome measure)
Pure tone audiometric threshold
Same as current
Complete list of historical versions of study NCT00335920 on Archive Site
  • Word recognition (speech audiometry)
  • tinnitus improvement
  • adverse events (worsening of hearing and/or vertigo and/or tinnitus, middle ear inflammation, pain)
Same as current
Not Provided
Not Provided
Safety and Efficacy of Intratympanic Application of Dexamethasone Via Catheter in Patients With Sudden Hearing Loss
A Prospective, Randomized, Double Blind, Placebo Controlled, Multicenter Study on the Safety and Efficacy of Continuous Infusion of Corticosteroid Delivered Via Catheter in Patients With Idiopathic Sudden Sensorineural Hearing Loss
The purpose of this study is to evaluate the efficacy and safety of an intratympanic continuous two-week application of dexamethasone compared to placebo using a temporarily implanted catheter in patients with severe to profound sudden sensorineural hearing loss and insufficient recovery after initial systemic prednisolone therapy.

Patients suffering from unilateral severe to profound sudden sensorineural hearing loss (ISSNHL) or anacusis with no or insufficient recovery after 12-21 days after onset will be treated for 14 days with Dexamethasone or placebo delivered intratympanically via a micro-catheter temporarily implanted into the round window niche and an external mini-pump.

Due to the relatively unknown risks of intratympanic treatment by catheter implantation, a significant spontaneous recovery rate and an existing standard therapy for ISSNHL in Germany (systemic glucocorticoids), patients will only be enrolled into the study if no or insufficient recovery of hearing threshold could be observed after initial systemic therapy.

The study will be carried out until 10 patients per group have been randomized regardless in which study center they have been randomized. After the last patient of these 10 patients per group has reached the endpoint an interim analysis will be done. The statistical estimation of the total number of subjects to be randomized will be completed after this interim analysis by the responsible statistician.

Phase 3
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Sudden Deafness
Drug: Dexamethasone-dihydrogenphosphate (4mg/ml)
Not Provided
Plontke SK, Löwenheim H, Mertens J, Engel C, Meisner C, Weidner A, Zimmermann R, Preyer S, Koitschev A, Zenner HP. Randomized, double blind, placebo controlled trial on the safety and efficacy of continuous intratympanic dexamethasone delivered via a round window catheter for severe to profound sudden idiopathic sensorineural hearing loss after failure of systemic therapy. Laryngoscope. 2009 Feb;119(2):359-69. doi: 10.1002/lary.20074.

*   Includes publications given by the data provider as well as publications identified by Identifier (NCT Number) in Medline.
July 2007
July 2006   (Final data collection date for primary outcome measure)

Inclusion Criteria:

  • Signed informed consent form
  • Age is greater than 18 years old and less than 75 years old.
  • Diagnosis of unilateral Idiopathic sudden sensorineural hearing loss (i.e. sudden sensorineural hearing loss of unknown etiology
  • Sensorineural hearing loss is at least 50 dB or more for three or more frequencies in standard pure tone, bone-conducted audiogram within the range of 500 Hz to 4000 Hz (500, 1000, 2000, 3000 and 4000), 60 dB or more for two of these frequencies or 70 dB or more for any frequency within this range, or a decrease in the SRT to 70 dB or greater (not accounted for by conductive hearing loss) or a drop in speech discrimination score to less than or equal to 30%
  • hearing loss occurred within 72 hours
  • Hearing loss occurred at least 12 days ago but less than or equal to 21 days ago
  • Insufficient recovery of the ISSNHL at least 12 days after onset whether or not the patient received Local Standard Therapy (i.e. Hearing in the contralateral ear is at least 20 dB better than the affected ear in at least three frequencies (any three of 500, 1000, 2000, 3000, 4000 Hz))

Exclusion Criteria:

  • Age is less than 18 or greater than 75 years old
  • Hearing loss occurred less than 12 days or more than 21 days ago
  • Positive pregnancy test, risk of pregnancy (insufficient protection or lactation
  • Middle ear inflammation or effusion
  • Ear canal inflammation
  • Conductive hearing loss of greater than 10 dB
  • Sudden bilateral hearing loss
  • Presence of any conditions or symptoms which indicate that the hearing loss is not ISSNHL, for example, acoustic trauma, Meniere's disease, fluctuating hearing loss, endolymphatic hydrops, suspected retro-cochlear lesion, hearing loss due to ear surgery, perilymph fistula or barotrauma.
  • Pulse synchronic tinnitus (potentially due to glomus jugulare tumor)
  • Previous otologic surgery (excluding ventilation tubes)
  • History in the past 6 months of ototoxic treatment such as chemotherapy, use of loop diuretics, high dose aspirin, etc.
  • Known hypersensitivity, allergy or intolerance to the study medication or any history of severe abnormal drug reaction
  • Use of non-permitted treatment during the study
  • Intake of experimental drugs or participation in a clinical study within the last 30 days
  • Only hearing ear
  • History of drug abuse or alcoholism
  • History of an ischemic disorder (previous strokes, previous heart attacks, peripheral arterial occlusion disease)
  • Patient is not capable of understanding the informed consent form (whether due to its language or for other reasons)
  • Any psychiatric syndrome requiring treatment with neuroleptics, antidepressants, hypnotics or anxiolytics which has/have been prescribed within three month preceding inclusion into the study and/or cannot be continued at the same dose during the study
  • Any severe (systemic) neurological disease (e.g. Epilepsy, Parkinson's disease, Dementia/Alzheimer's disease, Multiple sclerosis)
  • Any reason, in the investigator's opinion, that prohibits inclusion into the study
Sexes Eligible for Study: All
18 Years to 75 Years   (Adult, Older Adult)
Contact information is only displayed when the study is recruiting subjects
Inner ear topical dexamethason
Not Provided
Not Provided
Not Provided
Prof. Dr. Dr. h.c. mult. Hans-Peter Zenner, University of Tuebingen, D/o Otorhinolarymgology
University Hospital Tuebingen
Not Provided
Principal Investigator: Hans-Peter Zenner, M.D. Department of Otorhinolaryngology, University of Tubingen
Study Director: Stefan K Plontke, M.D. Department of Otorhinolaryngology, University of Tubingen
University Hospital Tuebingen
February 2008

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP