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The TrapezoidalWave Flowmeter
Preliminary Measurements of Blood Flow in
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adjustment aminophylline amplifier and demodulator animal artery tunnel bifilar-wound calibration cannula clamp discussed Dobson dog leg effective tissue flow electrode lead electromagnetic blood flowmeter electromagnetic flowmeter energizes the magnet epinephrine in oil femoral artery flow Figure flow signal flow-signal amplifier flowmeter transducer fluid former component frequency response gate-drive pulse hind limb histamine infusion of norepinephrine injected leg injection of epinephrine injection of norepinephrine input amplifier input signal instrument intra-arterial injection Kolin Lawrence Radiation Laboratory magnet coil magnet current magnet-current amplifier magnetic field mean flow meter ml/min negative flow output amplifier perfusion Pitressin potted Preamplifier procaine radioactive sodium recorded shown in Fig sine wave sine-wave sodium pentobarbital square wave square-wave flowmeter total femoral artery Total Femoral Flow total flow Total turnover rate transducer element Transducers designed transformer component transistors trapezoidal wave form trapezoidal-wave electromagnetic blood trapezoidal-wave flowmeter tube velocity vessel voltage wave flowmeter zener diodes zero flow