Læknablaðið : fylgirit - 01.06.2005, Blaðsíða 22

ABSTRACTS / XXIX CONGRESS OF THE NORDIC ASSOCIATION OF OTOLARYNGOLOGY
decreases with increased age in both ears. All data available is
now under thorough investigation schedule, which can be coupled
with all other fields of data, harvested in the AGES Reykjavík
study.
The AGES Reykjavík study is one of the largest epidemiology
studies in to ageing carried out.
Abstract no.: 039
In vivo visualization of endolymphatic hydrops in man
Pyykkö I, Zou J, Daspidar P, Bjelke B
Department of Otolaryngology, University Hospital of Tampere
The recent magnetic resonance imaging (MRI) technique has
made it possible to examine the cochlear compartments by using
Gd- DTPA-BMA conlrast agent. As the Gd- DTPA-BMA does
not enter into the endolymph but loads the perilymph the tech-
nique provides possibilities to visualize the different cochlear
compartments and the tightness of the endolymphatic compart-
ment. The purpose of the study was to evaluate possible changes
of the cochlea in Meniere’s disease using MRI in man. The con-
trast agent was injected in the middle ear cavity 2 h before MRI.
In all subject after 2 hours Gd could be traced in the basal turn
of the cochlea as well as in the vestibulum. The fine structure of
the three partitions of the basal turn of the cochlea was visualized
with MRI in three subjects as Gd appeared mainly in scala
tympani and vestibuli. In one subject the scala media was filled
with Gd. After 12 hours in one subject the Gd had reached the
apex whereas in most subjects the Gd-DTPA-BMA filled the
second turn.
Endolymphatic space and hydrops can be visualized by using
Gd in man and it is possible to quantify the tightness of the scala
media.
Abstract no.: 040
Inner ear conductive hearing loss: audio-vestibular and
radiological findings
Karlberg M, Annertz M, Einarsson EJ, Johansson L, Magnusson M
Lund University Hospital
Inner ear conductive hearing loss is defined as a consistent con-
ductive hearing impairment without signs of tympanic or middle
ear problems. The underlying pathology has previously been hard
to explain. Recent progress in vestibular testing and radiology
has made it possible to define a patient population with inner ear
conductive hearing loss due to an abnormal ‘third window’ to the
inner ear.
The patients have a combination of the following findings: low-
frequency conductive hearing loss (250-1000 Hz), bone conduction
hyperacusis at 250 and 500 Hz (0 to -10 dB), positive Weber if a
tuning fork is placed on the anklel, normal auditory reflexes and
normal vestibular evoked myogenic potentials (VEMPs, a test of
saccular function) despite the conductive hearing loss, auditory
reflexes and exceptional low VEMP thresholds on the affected
ear.
Temporal bone CT findings include: superior semicircular
canal dehiscence, large vestibular aqueduct and Mondini-like
cochlear dysplasia.
Conductive hearing loss patients with the above combination
of audio-vestibular findings should be examined with high-
resolution temporal bone CT scans, as this might spare the
patients from having unnecessary middle ear surgery.
Abstract no.: 041
Long term outcome of facial palsy in neuroborreliosis
Dan Bagger-Sjöback, Sten Remahl, Margareta Ericsson
Department of Otolaryngology, Karolinska Hospital, Stockholm, Sweden
Facial palsy is commonly occurring as a result of a borrelia infec-
tion. Thus, in children with manifest borreliosis facial palsy has
been found in about half of the patients. The prognosis has so
far been considered favourable with total regression of facial
symptoms after three months in a majority of cases. This issue
has, however, to some degree, been challenged by the results
of a survey performed in all children in the greater Stockholm
area, treated for neuroborreliosis during three years in the mid
nineties. Thirteen percent of the questioned children responded
that they had some residual symptoms of their facial palsy, three
to five years after the borrelia infection. These 13 children were
called in and investigated with a clinical examination as well as
with neurophysiological methods i.e. EMG and electroneuronog-
raphy, in order to assess their facial function. Eleven children in
the surveyed group that had responded that their facial palsy was
totally cured were called in as controls. When examined clinically,
nine of the thirteen children with claimed residual symptoms were
graded as House-Brackmann grade II of facial palsy whereas four
were seen to have normal function. In the control group two of the
eleven children had some slight degree of residual palsy (HBII).
The electrophysiological results indicated that about half of the
children in the residual palsy group had abnormal values, which
interestingly also was the case in the control group. In conclusion,
it has been shown that children with previous neuroborreliosis
and facial palsy in a small percentage retain clinical and electro-
physiological signs of a slight facial palsy.
Abstract no.: 042
Value of imaging studies in vertiginous children: a retro-
spective study in a Helsinki University ENT clinic
Niemensivu R, Pyykkö I, Kentala E
Helsinki and Tampere University Hospital, Finland
Background: The diagnostic work-up in vertiginous children is
challenging. The most common reasons for dizziness in children
are benign paroxysmal vertigo (BPV) and migraine-associated
dizziness. A retrospective chart review carried out in a tertiary
referral center in the Helsinki University Central Hospital ENT
clinic to determine the value of imaging studies in evaluation of
vertiginous children during a 1-year period.
Subjects: 1300 children aged from 0 to 17 years, underwent either
computer tomography (CT) or magnetic resonance imaging
(MRI) examination during the study year.
22 Læknablaðið/Fylgirit 51 2005/91