Abstract: There is disclosed a blood pressure measuring instrument which utilizes a standard cuff, a bulb for manually pumping up the cuff pressure, and a bleed hole which allows the cuff pressure to decrease at the rate of a few mm Hg per second. A single pressure transducer is in communication with the cuff interior and its output is sampled at a rate much higher than that of the blood pressure pulses.

Abstract: There is disclosed a blood pressure measuring instrument which utilizes a standard cuff, a bulb for manually pumping up the cuff pressure, and a bleed hole which allows the cuff pressure to decrease at the rate of a few mm Hg per second. A single pressure transducer is in communication with the cuff interior and its output is sampled at a rate much higher than that of the blood pressure pulses.

Abstract: There is disclosed a microprocessor-based system whose firmware controls a normal mode of operation and a factory-adjustment mode of operation. The sequencing in the two modes is controlled by branching in accordance with system-state tests performed during the sequencing. The factory-adjustment mode of operation never takes place during normal use of the system, and a branch to the factory-adjustment mode is controlled by forcing particular system-state test signals in the factory. Where no extra test pins are available, a branch to the factory-adjustment mode can be controlled by forcing two incompatible test signals, that is, by forcing an overall system state which cannot occur during normal operation.