Static and dynamic postural control before and after cochlear implantation in adult patients.

On a Balance Master computerized force plate static and dynamic postural control was measured in 24 severe hearing-impaired patients before and after CI surgery, and 19 healthy adults in a prospective study. The test battery consisted of the modified clinical test of sensory interaction on balance, the Rhythmic Weight Shift, the Walk Across, and the Tandem Walk test. Postural control was significantly worse in CI candidates than in healthy adults. In contrast, caloric testing of the vestibular organ was normal in the majority of CI candidates and remained normal after CI surgery. Static and dynamic standing balance parameters remained unchanged after CI surgery for the vast majority of parameters. Male gender and age >51 years were negative risk factors in some balance tasks. The static and dynamic standing balance performance seemed to improve to some degree with longer time interval before the CI surgery. Postural control was impaired but not complained of in many CI candidates before CI surgery and remained impaired after CI surgery although caloric testing is normal in most patients.