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High-Frequency Audiometry in Children
Scandinavian Audiology, 1988On the grounds of recent literature and of their own previous studies, the authors have examined a group of 25 normal-hearing children, ranging from 7 to 10 years of age, with high-frequency audiometry. The results were compared with those obtained in a group of young adults.
FILIPO, Roberto +2 more
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Broadband high-frequency hybrid
IEEE Transactions on Instrumentation and Measurement, 2002Analog integrated circuit designs are often differential and require differential-to-single-ended hybrids for spectral measurements. This paper describes a broadband, high-frequency hybrid, whose output signal is proportional to the difference of two input ports, i.e., proportional to the differential signal. The main novelty of this hybrid is its high
Vandersteen, Gerd +2 more
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European Journal of Pediatrics, 1994
During high frequency oscillation (HFO) small volumes are delivered at frequencies up to 40 Hz; both inspiration and expiration are active. Oxygenation is controlled by the mean airway pressure level and carbon dioxide elimination by the delivered volume and, less so, by frequency. In some infants the delivered volume can be 50%-100% of the dead space.
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During high frequency oscillation (HFO) small volumes are delivered at frequencies up to 40 Hz; both inspiration and expiration are active. Oxygenation is controlled by the mean airway pressure level and carbon dioxide elimination by the delivered volume and, less so, by frequency. In some infants the delivered volume can be 50%-100% of the dead space.
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Ventilation at high respiratory frequencies
Anaesthesia, 1982Summary This paper reviews the development of different methods of ventilation at respiratory rates higher than 60 per minute (1 Hz) along with data on experimental and clinical uses of the techniques. The definitions and terms that have been used for these high rates at the present time are confusing.
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Ultrasound Patterns of Vitiligo at High Frequency and Ultra‐High Frequency
Journal of Ultrasound in MedicineObjectivesTo detect ultrasonographic anatomical alterations in all the skin layers in patients with vitiligo.MethodsA prospective observational color Doppler ultrasound study was performed in nonsegmental face and/or neck vitiligo patients without a history of previous treatments. Two sites, a lesional area and a contralateral clinically healthy region,
Ximena Wortsman +4 more
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