Focal Drug Delivery in Inner Ear Therapy

  • Jing Zou
Part of the Advances in Delivery Science and Technology book series (ADST)


Focal drug delivery in inner ear therapy such as intratympanic gentamicin sulphate injection for the treatment of Meniere’s disease and intratympanic corticosteroid therapy for idiopathic sudden sensorineural hearing loss has recently gained increasing popularity, partially because of its convenience, efficacy, and reduced systemic drug exposure and associated systemic adverse effects. This chapter describes the current scope of focal drug delivery in inner ear therapy including intratympanic perfusion (transtympanic injections using needles, transtympanic catheter injections, and trans-Eustachian tube catheter injections), organ-targeted delivery (round window diffusion-MicroWick device, round window diffusion-gelatine sponge, oval window diffusion-polyimide microlumen, tympanic medial wall diffusion), and direct cochlear drug delivery—the next-generation cochlear implant. The advantages and disadvantages of each technique are compared.


Tympanic Membrane Cochlear Implant Cochlear Implantation Round Window Oval Window 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



I want to thank Professor Ilmari Pyykkö for his positive comments on the chapter and providing the image of Fig. 9.4. The writing was supported by the 7th Framework Programme project of the European Union, NANOCI (NMP4-SL-2012-281056).


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Copyright information

© Controlled Release Society 2014

Authors and Affiliations

  1. 1.Hearing and Balance Research Unit, Field of OtolaryngologySchool of Medicine, University of TampereTampereFinland
  2. 2.Department of Otolaryngology-Head & Neck Surgery, Center for Otolaryngology-Head & Neck Surgery of Chinese PLAChanghai Hospital, Second Military Medical UniversityShganghaiChina

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