This is a report of using a new Doppler Flow Meter (DFM-4500 by Hayashi-Denki Co., Ltd.) to monitor changes in blood flow velocity and flowrate of the brachial artery with its diameter at the decubitus side of 31 healthy volunteers in lateral position.This device utilizes a simultaneous combination of an ultrasonic echo tracking (A-mode) scan to determine the diameter of the artery and of a one-beam Doppler technique to measure the cross sectional area of the vessel. Blood flowrate of the brachial artery was 2.50 ±1.13ml/sec at control (supine resting), from which 29% decreased to 1.70 ±0.90ml/sec at 15 min., 40% 1.42 ±0.75ml/sec at 30 min., 45% 1.34 ±0.78ml/sec at 45 min. and 46% decreased to 1.25 ±0.82ml/sec at 60 min. after the beginning of decubitus position, respectively.Thus, progressive and significant decreases were observed both in blood flow velocity and volume of the artery according to time-course of the position. However, the diameter of the artery showed a significant decrease only at 60 min. after the decubitus position. We conclude that this device is an important development in the field of noninvasive quatitative determination of blood flow in superficial arteries.

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Towelholder^[○!R] (HOGY-MT-561-2) and Mukinguard^[○!R] (HOGY-MT-561-1) were developed recently as the container of sterilized disposable towels. The safety and reliabioity of these two apparatus were studied by bacteriological method.In the Towelholder^[○!R] the towels were kept sterile for 24 hours, when the lid was closed. They were sterile for 10 minutes, when the lid was opened. Thirty attempts of opening and closing of the lid showed no bacteria grown.When Mukinguard^[○!R] was used with clean air flow, no accumulative bacteria grew over 6 hours in the apparatus. Without clean air flow, accumulative bacteria grew within 1 hour. In Mukinguard^[○!R] contamination of the towels was not found for 7 days with clean air flow. Without clean air flow, the towels were contaminated within 1 hour.

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