Auditory Brainstem Evoked Potentials (ABEP) were recorded from 29 adults and children, accidentally exposed to lead through food until approximately a year prior to this study. ABEP were recorded in response to 75 dBHL click presented at rates of 10/sec. and 55/sec. Average values were calculated for peak latency and for interpeak latency differences. Average values of the effect of increasing stimulus rate were calculated as well. Similar values were calculated for normative child and adult control groups.IPLD (I-III) showed the most significant and recurring results, with longer intervals in lead-exposed children compared with their control group. Increasing stimulus rate, on the other hand, affected the adult lead-exposed subjects more than the children. These results may imply an impairment of the auditory system with azonal and myelin involvement. ABEP is suggested as a sensitive detector of subclinical lead exposure effects on the nervous system.

A patient suffering from malignant external otitis (MEO) underwent early blood pool scanning followed after 2 hours by 99m To MDP bone scanning, and serial Ga-67 citrate scintigraphies of the skull. The former two procedures served as a diagnostic tool to MEO. The latter was used for estimating the extent of the infective process, and for following-up the efficacy of treatment.The complementary role of these three procedures in the diagnosis, and follow-up of MEO, with special emphasis on immediate blood pool scanning as part of the diagnostic procedure, is illustrated.

Otitis media is one of the most common childhood ailments and, therefore, has a significant impact on public healthcare expenditure. The initial diagnosis is usually performed by a primary-care physician and is based upon otoscopy and symptomatology; the certainty of diagnosis of acute otitis media is only 58-73%. This study aimed to assess the efficacy of a spectrophotometer-based system in identifying otitis media by comparing the output from the system with the clinical diagnosis of an experienced otologist and, hence, to evaluate the system as a diagnostic aid to primary-care physicians. The study was prospective and double blind. An otologist examined 258 patients consecutively with an oto-microscope and all of the patients were simultaneously examined with a spectrometer-based data acquisition system incorporated in a standard otoscope. The otologist's diagnosis served as a "gold standard". The acquired data were analysed by means of partial least squares regression. The system correctly differentiated acute otitis media from serous otitis media and normal ears with sensitivity of 93% and specificity of 88%. The sensitivity and specificity were 89 and 95%, respectively, in a subset of subjects aged 12 y or less. Spectrophotometry was found to be a highly accurate means of diagnosing acute otitis media. We consider that it will become an important diagnostic aid for primary care physicians.