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M Hirabayashi

Publications and source records attributed to M Hirabayashi.

103 records · Page 6Linked to original sources
PubMedDate not supplied

Effects of analog and digital filtering on auditory middle latency responses in adults and young children.

Effects of analog high pass (HP) filtering were compared with those of zero phase-shift digital filtering on the auditory middle latency responses (MLR) from nine adults and 16 young children with normal hearing. Analog HP filtering exerted several prominent effects on the MLR waveforms in both adults and young children, such as suppression of Po (ABR), enhancement of Nb, enhancement or emergence of Pb, and latency decrements for Pa and the later components. Analog HP filtering at 20 Hz produced more pronounced waveform distortions in the responses from young children than from adults. Much greater latency decrements for Pa and Nb were observed for young children than for adults in the analog HP-filtered responses at 20 Hz. A large positive peak (Pb) emerged at about 65 ms after the stimulus onset. From these results, the use of digital HP filtering at 20 Hz is strongly recommended for obtaining unbiased and stable MLR in young children.

Acoustics↗
PubMedDate not supplied

Effect of heparin on unidentified fever after hepatectomy.

The antipyretic effects of heparin on fever of unknown origin were investigated in three patients after hepatectomy. The elevated temperatures in these patients seemed to be due to a pyrogen as no definite evidence of infection was obtained. Heparin (100-150 IU per kg of body weight) was given every eight or 12 hours subcutaneously, and fever disappeared in all three patients. This antipyretic effect of heparin was considered due to the acceleration of the pyrogen clearing system. The major thrust of this report is the clinical usefulness of heparin for the management of pyrexia of unknown origin.

Adult↗