HNO
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In contrast to auditory brainstem potentials (ABR), a more apically defined generation of middle latency evoked potentials (MLR) can be assumed due to the longer integration time present. To date, the effect of stimulus frequency spectra on MLR has not been completely known. By using masking with high-pass filtered white noise in 12 normal-hearing adults, we measured the dependence of amplitude and latency of ABR and MLR on filter frequency. ⋯ The high-pass masking of click stimuli showed a greater influence on the amplitude and latency of the ABR than on MLR. These different qualities have to be considered clinically when evaluating the methods and results of hearing testing with acoustic evoked potentials. Our findings show that MLR evoked by tone bursts should be used for the frequency selective diagnosis of hearing thresholds, especially in low-frequency ranges.
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Randomized Controlled Trial Comparative Study Clinical Trial
[Pain therapy after tonsillectomy in adults].
The postoperative pain and stress experienced by tonsillectomy patients are often underestimated. For this reason traditional methods of analgesia are frequently used but with an ineffective result. Our study involved an analysis of pain sensation with regard to postoperative analgesia after adult tonsillectomies. ⋯ Diclofenac monotherapy after tonsillectomy was only sufficient in cases involving an individual's low pain sensation. In cases with moderate or stronger pain the tonsillectomy patient requires an effective postoperative analgesia, as achieved with combined therapy using Tramadol retard and Naproxen. Aggravating side effects were not found in both schemes of analgesia.